### Verify Java Development Kit Installation

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Command to verify that the required JDK 17 environment is correctly installed and accessible in the system path.

```bash
java -version
```

--------------------------------

### getComposingStart

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current composing region start position.

```APIDOC
## GET /getComposingStart

### Description
Gets the current composing region start position.

### Method
GET

### Endpoint
/getComposingStart

### Response

#### Success Response (200)

*   **composingStart** (`number`) - The composing start position, or -1 if no composing region.

#### Response Example

```json
{
  "composingStart": 0
}
```
```

--------------------------------

### Deploy Flutter Applications to OpenHarmony Devices

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Methods for installing and running compiled HAP files on physical OpenHarmony devices. Includes direct execution via Flutter CLI and manual installation using the hdc tool.

```sh
# Method 1: Compile and install via Flutter CLI
flutter run --debug -d <deviceId>

# Method 2: Manual build and install via hdc
flutter build hap --debug
hdc -t <deviceId> install <hap file path>
```

--------------------------------

### getSelectionStart

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current selection start position.

```APIDOC
## GET /getSelectionStart

### Description
Gets the current selection start position.

### Method
GET

### Endpoint
/getSelectionStart

### Response

#### Success Response (200)

*   **selectionStart** (`number`) - The selection start position.

#### Response Example

```json
{
  "selectionStart": 10
}
```
```

--------------------------------

### Configure Flutter example pubspec.yaml

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/07_plugin/developing-an-ohos-plugin-using-flutter.md

Configures the example application's pubspec.yaml to include the local path_provider plugin and define the OHOS platform support.

```yaml
name: path_provider_example
description: Demonstrates how to use the path_provider plugin.
publish_to: none

environment:
  sdk: ">=2.18.0 <4.0.0"
  flutter: ">=3.3.0"

dependencies:
  flutter:
    sdk: flutter
  path_provider:
    path: ../../path_provider
  path_provider_platform_interface: ^2.0.0

dev_dependencies:
  flutter_test:
    sdk: flutter
  integration_test:
    sdk: flutter

flutter:
  uses-material-design: true
```

--------------------------------

### Configuring Permissions and Resource Strings

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/07_plugin/template_EN.md

Examples for defining required permissions in the module configuration and providing localized reasons in string.json.

```json
"requestPermissions": [
  {
    "name": "ohos.permission.INTERNET",
    "reason": "$string:network_reason",
    "usedScene": {
      "abilities": [
        "EntryAbility"
      ],
      "when":"inuse"
    }
  }
]
```

```json
{
  "string": [
    {
      "name": "network_reason",
      "value": "使用网络"
    }
  ]
}
```

--------------------------------

### Run Flutter Example on OpenHarmony Device (Shell)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/09_specifications/update-flutter-plugin-structure.md

Command to run the Flutter example application on a connected OpenHarmony device. Ensure the device is properly configured and the signature is set up in DevEco Studio.

```shell
cd integration_test/example
flutter run -d $DEVICE --debug
```

--------------------------------

### getPreviewTextStart

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the start position of the preview text in the original text.

```APIDOC
## GET /getPreviewTextStart

### Description
Gets the start position of the preview text in the original text.

### Method
GET

### Endpoint
/getPreviewTextStart

### Response

#### Success Response (200)

*   **previewTextStart** (`number`) - The preview text start position.

#### Response Example

```json
{
  "previewTextStart": 5
}
```
```

--------------------------------

### Preload Flutter Engine on Button Touch (ArkTS)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/04_development/using-flutterEnginePreload.md

This example demonstrates how to preload a Flutter engine when a button is touched. It uses the `FlutterEnginePreload.preloadEngine` method with context and parameters. The `onClick` event handles navigation to the Flutter page.

```arkts
build() {
  Button(this.title)
    .onClick(() => {
      try {
        router.pushUrl({ url: 'pages/Flutter', params: { route: this.route } });
      } catch (err) {
        Log.d(TAG, `跳转页面${this.route} error === ${JSON.stringify(err)}`);
      }
    })
    .onTouch((touch: TouchEvent) => {
      if (touch.type == TouchType.Down) {
        let params: Record<string, Object> = {};
        params['route'] = this.route;
        FlutterEnginePreload.preloadEngine(getContext(this), params);
      }
    });
}
```

--------------------------------

### Installing Flutter Plugin Dependencies

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/07_plugin/template_EN.md

Methods for adding dependencies to a project using either npm or the pubspec.yaml configuration file.

```bash
npm install @flutter-tpl/<库名>@file:#
```

```yaml
dependencies:
  image_picker:
    git:
      url: https://gitcode.com/openharmony-tpc/flutter_packages.git
      path: packages/image_picker
```

--------------------------------

### Usage Example for OpenHarmony Build Aliases

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/08_FAQ/ohos-hap.md

Demonstrates how to initialize a project for OpenHarmony and execute the previously configured build and run aliases.

```shell
flutter create hello --platforms ohos
cd hello
# Compile the debug version.
fbuildD
# Run the debug version.
frunD
```

--------------------------------

### Documenting OpenHarmony Links in README

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/07_plugin/template_EN.md

Format for adding OpenHarmony documentation links to the main project README file.

```markdown
### OpenHarmony

- [中文](../camera_ohos/README_CN.md)
- [EN](../camera_ohos/README.md)
```

--------------------------------

### Configure HAP File Reference in Example (JSON)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/09_specifications/update-flutter-plugin-structure.md

Adjusts the 'oh-package.json5' file within the example directory to correctly reference the generated HAP files. This ensures the example app can locate and utilize the plugin's OpenHarmony module.

```json
{
  // ...
  "dependencies": {
    "@ohos/flutter_ohos": "file:./har/flutter.har"
  },
  "overrides": {
    "@ohos/flutter_ohos": "file:./har/flutter.har"
  }
}
```

--------------------------------

### Configure Pub Mirror for Flutter

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Environment variable configuration to speed up dependency resolution by using a mirror source for pub packages and Flutter storage.

```bash
PUB_HOSTED_URL=https://mirrors.tuna.tsinghua.edu.cn/dart-pub
FLUTTER_STORAGE_BASE_URL=https://mirrors.tuna.tsinghua.edu.cn/flutter
```

--------------------------------

### Pre-draw Cached Flutter Engines with Viewport and ID Offset (ArkTS)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/04_development/using-flutterEnginePreload.md

This complex example shows how to pre-draw multiple cached Flutter engines. It involves setting custom viewport metrics for non-fullscreen rendering and managing unique `FlutterViewId`s using offsets. The `FlutterEnginePreload.predrawEngine` method is used with pre-obtained engine instances from `FlutterEngineCache`.

```arkts
.onTouch((touch: TouchEvent) => {
  if (touch.type == TouchType.Down) {
    let params: Record<string, Object> = {};
    let viewports: ViewportMetrics = new ViewportMetrics();
    // 多引擎时，对传入的 view ID 手动添加偏移
    let nextViewId = FlutterManager.getInstance().getNextFlutterViewId();
    let nextViewId2 = FlutterManager.getInstance().getNextFlutterViewId(1);
    viewports.physicalWidth = display.getDefaultDisplaySync().width;
    viewports.physicalHeight = display.getDefaultDisplaySync().height / 2;
    params[FlutterAbilityLaunchConfigs.PRELOAD_VIEWPORT_METRICS_KEY] = viewports;

    FlutterEnginePreload.predrawEngine(
      FlutterEngineCache.getInstance().get('DoubleFlutterTop'),
      params,
      nextViewId
    );

    FlutterEnginePreload.predrawEngine(
      FlutterEngineCache.getInstance().get('DoubleFlutterBottom'),
      params,
      nextViewId2
    );
  }
});
```

--------------------------------

### Set Preview Text Start Position

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Sets the start position for the preview text. This function accepts a number indicating the start position and returns void.

```dart
void setPreviewTextStart(int previewTextStart)
```

--------------------------------

### Install HAP Manually on OpenHarmony

Source: https://context7.com/smdegz/harmenyflutterdoc/llms.txt

This command installs a HAP (Harmony Application Package) file onto a specified OpenHarmony device using the hdc (HUAWEI Device Connector) tool. Ensure the device ID is correctly provided and the path to the HAP file is accurate.

```bash
hdc -t <device-id> install path/to/app.hap
```

--------------------------------

### Create and Build Flutter Projects for OpenHarmony

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Commands to initialize a Flutter project with OpenHarmony support and compile the HAP package. Supports creating projects with specific platform targets or all standard platforms.

```sh
# Method 1 for project creation: Only the ohos platform is created.
flutter create --platforms ohos <projectName> 

# Method 2 for project creation: Android, iOS, and ohos platforms are created.
flutter create  <projectName> 

# Go to the root directory of the project and compile the HAP.
flutter build hap --debug
```

--------------------------------

### Clone OpenHarmony Flutter Repository

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Commands to clone the OpenHarmony-specific Flutter repository and switch to the development branch to access the latest features.

```bash
git clone https://gitcode.com/openharmony-tpc/flutter_flutter.git
git checkout -b dev origin/dev
```

--------------------------------

### Create Flutter Project for OpenHarmony

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/OpenHarmony-device-operation-guide.md

Creates a new Flutter project with OpenHarmony as a target platform. This command initializes the project structure required for developing cross-platform applications.

```bash
flutter create --platforms ohos <projectName>
```

--------------------------------

### Configure System Environment Variables

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/openharmony-flutter-environment-setup.md

Commands to identify the current shell and update the configuration file (e.g., .bash_profile or .zshrc) with required Flutter and OpenHarmony SDK paths.

```bash
echo $SHELL
vi ~/.bash_profile
# Add the following configurations:
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
export PATH=/Users/admin/ohos/flutter_flutter/bin:$PATH
export TOOL_HOME=/Applications/DevEco-Studio.app/Contents
export DEVECO_SDK_HOME=$TOOL_HOME/sdk
export PATH=$TOOL_HOME/tools/ohpm/bin:$PATH
export PATH=$TOOL_HOME/tools/hvigor/bin:$PATH
export PATH=$TOOL_HOME/tools/node/bin:$PATH
source ~/.bash_profile
```

--------------------------------

### Running Flutter on OpenHarmony

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/07_plugin/template_EN.md

Command to execute and compile the Flutter application on a specific OpenHarmony device.

```bash
flutter run -d xxxxxxxx
```

--------------------------------

### Modify Sandbox Configuration for /system/lib64

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/03_environment/OpenHarmony-device-operation-guide.md

Updates the application sandbox configuration file to include the '/system/lib64' path. This allows applications to access libraries located in this directory.

```json
{
   "src-path": "/system/lib64",
   "sandbox-path": "/system/lib64",
   "sandbox-flags": [
      "bind",
      "rec"
   ],
   "check-action-status": "false"
}
```

--------------------------------

### SystemChromeStyle Constructor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/systemchannels/PlatformChannel/classes/SystemChromeStyle.md

Constructs a new SystemChromeStyle instance with specified colors and brightness for system UI elements.

```APIDOC
## Constructor SystemChromeStyle

### Description
Constructs a new SystemChromeStyle instance.

### Method
CONSTRUCTOR

### Endpoint
N/A

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
- **statusBarColor** (number) - Required - The status bar color
- **statusBarIconBrightness** (Brightness) - Required - The status bar icon brightness
- **systemStatusBarContrastEnforced** (boolean) - Required - Whether status bar contrast is enforced
- **systemNavigationBarColor** (number) - Required - The navigation bar color
- **systemNavigationBarIconBrightness** (Brightness) - Required - The navigation bar icon brightness
- **systemNavigationBarDividerColor** (number) - Required - The navigation bar divider color
- **systemNavigationBarContrastEnforced** (boolean) - Required - Whether navigation bar contrast is enforced

### Request Example
```json
{
  "statusBarColor": 16777215,
  "statusBarIconBrightness": "dark",
  "systemStatusBarContrastEnforced": false,
  "systemNavigationBarColor": 0,
  "systemNavigationBarIconBrightness": "light",
  "systemNavigationBarDividerColor": 16777215,
  "systemNavigationBarContrastEnforced": true
}
```

### Response
#### Success Response (200)
- **SystemChromeStyle** (object) - The newly created SystemChromeStyle object

#### Response Example
```json
{
  "statusBarColor": 16777215,
  "statusBarIconBrightness": "dark",
  "systemStatusBarContrastEnforced": false,
  "systemNavigationBarColor": 0,
  "systemNavigationBarIconBrightness": "light",
  "systemNavigationBarDividerColor": 16777215,
  "systemNavigationBarContrastEnforced": true
}
```
```

--------------------------------

### Set Selection Start Position

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Sets the start position of the current selection. This function takes a number for the new start position and returns void.

```dart
void setSelectionStart(int newSelectionStart)
```

--------------------------------

### Initialize and Use ByteBuffer

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/util/ByteBuffer/classes/ByteBuffer.md

Demonstrates how to instantiate a new ByteBuffer and access its properties such as current offset and remaining bytes.

```typescript
const buffer = new ByteBuffer();
const offset = buffer.byteOffset;
const remaining = buffer.bytesRemaining;
console.log(`Offset: ${offset}, Remaining: ${remaining}`);
```

--------------------------------

### Initialize and Compare ViewportMetrics

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/view/FlutterView/classes/ViewportMetrics.md

Demonstrates how to instantiate a ViewportMetrics object, clone it, and compare two instances for equality.

```typescript
const metrics = new ViewportMetrics();
metrics.physicalWidth = 1080;

// Create a deep copy
const clonedMetrics = metrics.clone();

// Check for equality
const areEqual = metrics.isEqual(clonedMetrics); // Returns true
```

--------------------------------

### Creating and Managing FlutterEngine in OpenHarmony

Source: https://context7.com/smdegz/harmenyflutterdoc/llms.txt

This TypeScript code illustrates how to create, initialize, and manage a FlutterEngine instance in OpenHarmony. It covers setting up the Dart execution environment, registering plugins, and interacting with platform channels for navigation and lifecycle events. Dependencies include modules from '@ohos/flutter_ohos'.

```typescript
// Creating and managing FlutterEngine directly
import FlutterEngine from '@ohosos/flutter_ohos/src/main/ets/embedding/engine/FlutterEngine'
import { FlutterLoader } from '@ohosos/flutter_ohos/src/main/ets/embedding/engine/loader/FlutterLoader'
import { DartEntrypoint } from '@ohosos/flutter_ohos/src/main/ets/embedding/engine/dart/DartExecutor'
import { PlatformViewsController } from '@ohosos/flutter_ohos/src/main/ets/plugin/platform/PlatformViewsController'
import common from '@ohos.app.ability.common'

async function createFlutterEngine(context: common.Context): Promise<FlutterEngine> {
  // Create engine with default components
  const engine = new FlutterEngine(
    context,
    null,  // FlutterLoader - auto-created if null
    null,  // FlutterNapi - auto-created if null
    null   // PlatformViewsController - auto-created if null
  )

  // Initialize the engine
  engine.init(context, [], false)

  // Execute Dart code
  const dartExecutor = engine.getDartExecutor()
  const entrypoint = DartEntrypoint.createDefault()
  dartExecutor.executeDartEntrypoint(entrypoint)

  // Access various channels
  const lifecycleChannel = engine.getLifecycleChannel()
  lifecycleChannel?.appIsResumed()

  const navigationChannel = engine.getNavigationChannel()
  navigationChannel?.setInitialRoute('/home')

  return engine
}

// Cleanup when done
function destroyEngine(engine: FlutterEngine): void {
  engine.destroy()
}

```

--------------------------------

### Get Pending Channel Response Count

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/dart/DartExecutor/classes/DartExecutor.md

Gets the number of pending channel callback replies. This is useful for testing frameworks to determine if the application is idle.

```typescript
dartExecutor.getPendingChannelResponseCount()
```

--------------------------------

### getStringCache

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current text content.

```APIDOC
## GET /getStringCache

### Description
Gets the current text content.

### Method
GET

### Endpoint
/getStringCache

### Response

#### Success Response (200)

*   **text** (`string`) - The current text content.

#### Response Example

```json
{
  "text": "This is the current text."
}
```
```

--------------------------------

### Initialize and Configure FlutterEngine Options

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterEngineGroup/classes/Options.md

Demonstrates how to instantiate the Options class and configure various settings such as the initial route and Dart entrypoint arguments. These methods support method chaining for fluent configuration.

```dart
final options = Options(context)
  .setInitialRoute("/")
  .setDartEntrypointArgs(["--verbose"])
  .setWaitForRestorationData(true);
```

--------------------------------

### getSelectionString

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the currently selected text.

```APIDOC
## GET /getSelectionString

### Description
Gets the currently selected text.

### Method
GET

### Endpoint
/getSelectionString

### Response

#### Success Response (200)

*   **selectedText** (`string`) - The selected text, or empty string if selection is invalid.

#### Response Example

```json
{
  "selectedText": "example text"
}
```
```

--------------------------------

### getRightTextOfCursor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the text to the right of the cursor.

```APIDOC
## GET /getRightTextOfCursor

### Description
Gets the text to the right of the cursor.

### Method
GET

### Endpoint
/getRightTextOfCursor

### Parameters

#### Query Parameters

*   **length** (`number`) - Required - The maximum number of characters to return.

### Response

#### Success Response (200)

*   **text** (`string`) - The text to the right of the cursor.

#### Response Example

```json
{
  "text": "Flutter"
}
```
```

--------------------------------

### Instantiate FlutterEngine

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterEngine/classes/FlutterEngine.md

Demonstrates how to construct a new FlutterEngine instance. This constructor initializes various components like DartExecutor, channels, plugins, and listeners. It requires context and optionally accepts FlutterLoader, FlutterNapi, and PlatformViewsController.

```typescript
new FlutterEngine(context, flutterLoader, flutterNapi, platformViewsController)
```

--------------------------------

### getLeftTextOfCursor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the text to the left of the cursor.

```APIDOC
## GET /getLeftTextOfCursor

### Description
Gets the text to the left of the cursor.

### Method
GET

### Endpoint
/getLeftTextOfCursor

### Parameters

#### Query Parameters

*   **length** (`number`) - Required - The maximum number of characters to return.

### Response

#### Success Response (200)

*   **text** (`string`) - The text to the left of the cursor.

#### Response Example

```json
{
  "text": "Hello"
}
```
```

--------------------------------

### FlutterApplicationInfo Constructor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/loader/FlutterApplicationInfo/classes/FlutterApplicationInfo.md

Constructs a new FlutterApplicationInfo instance with specified configuration parameters.

```APIDOC
## Constructor FlutterApplicationInfo

### Description
Constructs a new FlutterApplicationInfo instance.

### Method
CONSTRUCTOR

### Endpoint
N/A

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
* **aotSharedLibraryName** (string) - Optional - Name of the AOT shared library, or null to use default
* **vmSnapshotData** (string) - Optional - Name of the VM snapshot data file, or null to use default
* **isolateSnapshotData** (string) - Optional - Name of the isolate snapshot data file, or null to use default
* **flutterAssetsDir** (string) - Optional - Directory containing Flutter assets, or null to use default
* **domainNetworkPolicy** (string) - Optional - Domain network policy, or null for empty string
* **nativeLibraryDir** (string) - Required - Directory containing native libraries
* **automaticallyRegisterPlugins** (boolean) - Required - Whether to automatically register plugins

### Request Example
```json
{
  "aotSharedLibraryName": "libflutter.so",
  "vmSnapshotData": "vm_snapshot_data",
  "isolateSnapshotData": "isolate_snapshot_data",
  "flutterAssetsDir": "/path/to/assets",
  "domainNetworkPolicy": "example.com",
  "nativeLibraryDir": "/path/to/native/libs",
  "automaticallyRegisterPlugins": true
}
```

### Response
#### Success Response (200)
* **FlutterApplicationInfo** (object) - The newly created FlutterApplicationInfo instance.

#### Response Example
```json
{
  "aotSharedLibraryName": "libflutter.so",
  "vmSnapshotData": "vm_snapshot_data",
  "isolateSnapshotData": "isolate_snapshot_data",
  "flutterAssetsDir": "/path/to/assets",
  "domainNetworkPolicy": "example.com",
  "nativeLibraryDir": "/path/to/native/libs",
  "automaticallyRegisterPlugins": true,
  "isDebugMode": false,
  "isProfile": false
}
```
```

--------------------------------

### PlatformViewRegistryImpl Constructor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/platform/PlatformViewRegistryImpl/classes/PlatformViewRegistryImpl.md

Constructs a new PlatformViewRegistryImpl instance.

```APIDOC
## Constructor PlatformViewRegistryImpl

### Description

Constructs a new PlatformViewRegistryImpl instance.

### Method

`constructor`

### Endpoint

N/A

### Parameters

None

### Request Example

```javascript
const registry = new PlatformViewRegistryImpl();
```

### Response

#### Success Response (200)

- **instance** (`PlatformViewRegistryImpl`) - A new instance of PlatformViewRegistryImpl.

#### Response Example

```json
{
  "instance": "PlatformViewRegistryImpl"
}
```
```

--------------------------------

### getSelectionEnd

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current selection end position.

```APIDOC
## GET /getSelectionEnd

### Description
Gets the current selection end position.

### Method
GET

### Endpoint
/getSelectionEnd

### Response

#### Success Response (200)

*   **selectionEnd** (`number`) - The selection end position.

#### Response Example

```json
{
  "selectionEnd": 15
}
```
```

--------------------------------

### FlutterAbilityLaunchConfigs Reference

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/ohos/FlutterAbilityLaunchConfigs/classes/FlutterAbilityLaunchConfigs.md

A collection of static constants used to configure Flutter ability launch parameters, including metadata keys and default values.

```APIDOC
## FlutterAbilityLaunchConfigs Constants

### Description
This class provides a centralized set of constants for configuring Flutter ability launch parameters, including entrypoint definitions, engine management, and UI behavior.

### Key Constants
- **DART_ENTRYPOINT_META_DATA_KEY** (string) - Metadata key for the Dart entrypoint.
- **DART_ENTRYPOINT_URI_META_DATA_KEY** (string) - Metadata key for the Dart entrypoint URI.
- **DEFAULT_BACKGROUND_MODE** (BackgroundMode) - Default background mode (opaque).
- **DEFAULT_DART_ENTRYPOINT** (string) - Default entrypoint name ("main").
- **DEFAULT_INITIAL_ROUTE** (string) - Default initial route ("/").
- **EXTRA_CACHED_ENGINE_ID** (string) - Intent extra for cached engine ID.
- **EXTRA_INITIAL_ROUTE** (string) - Intent extra for the initial route.
- **HANDLE_DEEPLINKING_META_DATA_KEY** (string) - Metadata key for enabling deeplinking.

### Usage Example
```dart
// Example of using a constant to define an intent extra
intent.putExtra(FlutterAbilityLaunchConfigs.EXTRA_INITIAL_ROUTE, "/home");
```

### Full Property List
- **DART_ENTRYPOINT_META_DATA_KEY**: "io.flutter.Entrypoint"
- **DART_ENTRYPOINT_URI_META_DATA_KEY**: "io.flutter.EntrypointUri"
- **EXTRA_DART_ENTRYPOINT**: "dart_entrypoint"
- **EXTRA_DART_ENTRYPOINT_ARGS**: "dart_entrypoint_args"
- **EXTRA_ENABLE_STATE_RESTORATION**: "enable_state_restoration"
- **SPLASH_SCREEN_META_DATA_KEY**: "io.flutter.embedding.android.SplashScreenDrawable"
```

--------------------------------

### Update Entry OH-Package.json5 for Example (JSON)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/09_specifications/update-flutter-plugin-structure.md

Modifies the entry 'oh-package.json5' file in the example's 'ohos/entry' directory. It updates the dependency path for the plugin's HAP file to correctly point to the 'har' directory.

```json
{
  // ...
  "dependencies": {
    "integration_test": "file:../har/integration_test.har"
  }
}
```

--------------------------------

### getPreviewText

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current preview text from the input method.

```APIDOC
## GET /getPreviewText

### Description
Gets the current preview text from the input method.

### Method
GET

### Endpoint
/getPreviewText

### Response

#### Success Response (200)

*   **previewText** (`string`) - The preview text.

#### Response Example

```json
{
  "previewText": "World"
}
```
```

--------------------------------

### Clean Repository for Reproducible Demos

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/08_FAQ/README_EN.md

A set of git commands to initialize a repository and remove all untracked files, useful for creating minimal reproducible demo packages.

```shell
git init
git add -A
git commit -m "init"
git clean -dfx
```

--------------------------------

### getComposingEnd

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the current composing region end position.

```APIDOC
## GET /getComposingEnd

### Description
Gets the current composing region end position.

### Method
GET

### Endpoint
/getComposingEnd

### Response

#### Success Response (200)

*   **composingEnd** (`number`) - The composing end position, or -1 if no composing region.

#### Response Example

```json
{
  "composingEnd": 5
}
```
```

--------------------------------

### getRestorationData()

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/systemchannels/RestorationChannel/classes/RestorationChannel.md

Gets the most current restoration data that the framework has provided.

```APIDOC
## getRestorationData()

### Description
Gets the most current restoration data that the framework has provided.

### Method
`Uint8Array`

### Endpoint
N/A (Method within a class)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```json
{
  "method": "getRestorationData"
}
```

### Response
#### Success Response (200)
- **data** (`Uint8Array`) - The restoration data as a Uint8Array

#### Response Example
```json
{
  "data": "<binary data>"
}
```
```

--------------------------------

### getPreviewTextEnd

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the end position of the preview text in the original text.

```APIDOC
## GET /getPreviewTextEnd

### Description
Gets the end position of the preview text in the original text.

### Method
GET

### Endpoint
/getPreviewTextEnd

### Response

#### Success Response (200)

*   **previewTextEnd** (`number`) - The preview text end position.

#### Response Example

```json
{
  "previewTextEnd": 10
}
```
```

--------------------------------

### Initialize and Manage FlutterNapi Instance

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterNapi/classes/FlutterNapi.md

Demonstrates the instantiation of the FlutterNapi class and the essential lifecycle methods for attaching to the native engine and releasing resources.

```TypeScript
const flutterNapi = new FlutterNapi();

// Attach to the native engine before performing operations
flutterNapi.attachToNative();

// Perform operations...

// Clean up resources when finished
flutterNapi.detachFromNativeAndReleaseResources();
```

--------------------------------

### getIsCursorIdxOutOfPreviewTextRange

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets whether the cursor index is out of the preview text range.

```APIDOC
## GET /getIsCursorIdxOutOfPreviewTextRange

### Description
Gets whether the cursor index is out of the preview text range.

### Method
GET

### Endpoint
/getIsCursorIdxOutOfPreviewTextRange

### Response

#### Success Response (200)

*   **isOutOfRange** (`boolean`) - True if the cursor is out of range, false otherwise.

#### Response Example

```json
{
  "isOutOfRange": false
}
```
```

--------------------------------

### createAndRunEngineByOptions()

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterEngineGroup/classes/FlutterEngineGroup.md

Creates and runs a Flutter engine based on the provided options. If no engines exist, it creates a new one; otherwise, it spawns from the first existing engine.

```APIDOC
## POST /createAndRunEngineByOptions

### Description
Creates and runs a Flutter engine based on the provided options. If no engines exist, creates a new engine. Otherwise, spawns from the first engine.

### Method
POST

### Endpoint
/createAndRunEngineByOptions

### Parameters
#### Request Body
- **options** (Options) - Required - Configuration options for engine creation.

### Request Example
```json
{
  "example": {
    "options": {
      "route": "/",
      "initialRouteList": ["/", "/home"]
    }
  }
}
```

### Response
#### Success Response (200)
- **any** - The created or spawned FlutterEngine instance.

#### Response Example
```json
{
  "example": "FlutterEngine instance"
}
```
```

--------------------------------

### PlatformViewsController Properties

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/platform/PlatformViewsController/classes/PlatformViewsController.md

Methods for getting and setting parameters within the DVModelParameters.

```APIDOC
## GET /smdegz/harmenyflutterdoc/PlatformViewsController/getParams

### Description
Gets a parameter value from the DVModelParameters.

### Method
GET

### Endpoint
N/A

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
- **params** (DVModelParameters) - Required - The parameters object to read from
- **key** (string) - Required - The parameter key

### Request Example
```dart
final params = DVModelParameters(); // Assume params is initialized
final value = controller.getParams(params, 'someKey');
```

### Response
#### Success Response (200)
- **value** (number) - The parameter value as a number

#### Response Example
```json
{
  "value": 123
}
```

## PlatformViewsController/setParams

### Description
Sets a parameter value in the DVModelParameters.

### Method
POST

### Endpoint
N/A

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
- **params** (DVModelParameters) - Required - The parameters object to modify
- **key** (string) - Required - The parameter key
- **element** (Any) - Required - The value to set

### Request Example
```dart
final params = DVModelParameters(); // Assume params is initialized
controller.setParams(params, 'someKey', 'someValue');
```

### Response
#### Success Response (200)
N/A

#### Response Example
N/A
```

--------------------------------

### Get Application Data Directory (OpenHarmony)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/util/PathUtils/classes/PathUtils.md

Gets or creates the Flutter data directory for the application using the provided context. Returns the directory path or null if creation fails. This method is part of the PathUtils utility class in OpenHarmony.

```typescript
import { PathUtils } from '@ohos/etsapi';

// Assuming 'context' is available
const dataDir: string | null = PathUtils.getDataDirectory(context);
```

--------------------------------

### UIAbility and WindowStage Management

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/ohos/FlutterManager/classes/FlutterManager.md

Methods to manage the lifecycle and associations of UIAbility and WindowStage instances.

```APIDOC
## [METHOD] pushUIAbility

### Description
Pushes a UIAbility to the internal management list.

### Method
void

### Parameters
#### Request Body
- **uiAbility** (UIAbility) - Required - The UIAbility to add

***

## [METHOD] popUIAbility

### Description
Removes a UIAbility from the internal management list.

### Method
void

### Parameters
#### Request Body
- **uiAbility** (UIAbility) - Required - The UIAbility to remove

***

## [METHOD] pushWindowStage

### Description
Associates a specific WindowStage with a given UIAbility.

### Method
void

### Parameters
#### Request Body
- **uiAbility** (UIAbility) - Required - The UIAbility
- **windowStage** (WindowStage) - Required - The WindowStage to associate

***

## [METHOD] popWindowStage

### Description
Removes the WindowStage association for a specific UIAbility.

### Method
void

### Parameters
#### Request Body
- **uiAbility** (UIAbility) - Required - The UIAbility
```

--------------------------------

### Pre-warm Flutter Engines with FlutterEngineCache (TypeScript)

Source: https://context7.com/smdegz/harmenyflutterdoc/llms.txt

Illustrates how to use FlutterEngineCache to pre-warm and store FlutterEngine instances, significantly reducing the startup latency for Flutter content. It includes methods for pre-warming, retrieving cached engines, and cleaning them up.

```typescript
// Pre-warming and caching Flutter engines
import { FlutterEngineCache } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/FlutterEngineCache'
import FlutterEngine from '@ohos/flutter_ohos/src/main/ets/embedding/engine/FlutterEngine'
import { DartEntrypoint } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/dart/DartExecutor'
import common from '@ohos.app.ability.common'

const ENGINE_ID = "my_cached_engine"

// Pre-warm an engine during app initialization
async function preWarmEngine(context: common.Context): Promise<void> {
  const cache = FlutterEngineCache.getInstance()

  // Check if already cached
  if (cache.contains(ENGINE_ID)) {
    return
  }

  // Create and warm up the engine
  const engine = new FlutterEngine(context, null, null, null)
  engine.init(context, [], false)

  // Start Dart execution
  const dartExecutor = engine.getDartExecutor()
  dartExecutor.executeDartEntrypoint(DartEntrypoint.createDefault())

  // Cache the engine
  cache.put(ENGINE_ID, engine)
}

// Retrieve cached engine in FlutterAbility
export default class CachedEngineAbility extends FlutterAbility {
  // Return the cached engine ID
  getCachedEngineId(): string {
    return ENGINE_ID
  }

  // Don't destroy cached engine when ability is destroyed
  shouldDestroyEngineWithHost(): boolean {
    return false
  }
}

// Clean up when app terminates
function cleanupCachedEngines(): void {
  const cache = FlutterEngineCache.getInstance()
  const engine = cache.get(ENGINE_ID)
  if (engine) {
    engine.destroy()
    cache.remove(ENGINE_ID)
  }
}

```

--------------------------------

### getRightIdxOfPreviewTextRange

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the right index of the preview text range in the string cache.

```APIDOC
## GET /getRightIdxOfPreviewTextRange

### Description
Gets the right index of the preview text range in the string cache.

### Method
GET

### Endpoint
/getRightIdxOfPreviewTextRange

### Response

#### Success Response (200)

*   **rightIndex** (`number`) - The right index of the preview text range.

#### Response Example

```json
{
  "rightIndex": 10
}
```
```

--------------------------------

### Initialize StandardMethodCodec

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/common/StandardMethodCodec/classes/StandardMethodCodec.md

Demonstrates how to instantiate the StandardMethodCodec using a provided StandardMessageCodec.

```typescript
const messageCodec = new StandardMessageCodec();
const methodCodec = new StandardMethodCodec(messageCodec);
```

--------------------------------

### getLeftIdxOfPreviewTextRange

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Gets the left index of the preview text range in the string cache.

```APIDOC
## GET /getLeftIdxOfPreviewTextRange

### Description
Gets the left index of the preview text range in the string cache.

### Method
GET

### Endpoint
/getLeftIdxOfPreviewTextRange

### Response

#### Success Response (200)

*   **leftIndex** (`number`) - The left index of the preview text range.

#### Response Example

```json
{
  "leftIndex": 0
}
```
```

--------------------------------

### getId() - Get Overlay Surface ID

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterOverlaySurface/classes/FlutterOverlaySurface.md

Retrieves the unique identifier of the FlutterOverlaySurface.

```APIDOC
## getId()

### Description
Gets the unique identifier of this overlay surface.

### Method
`getId(): number`

### Endpoint
N/A (Method call on an instance)

### Parameters
None

### Request Example
```javascript
const overlaySurface = new FlutterOverlaySurface(456);
const id = overlaySurface.getId();
console.log(id); // Output: 456
```

### Response
#### Success Response (200)
- **id** (number) - The overlay surface ID

#### Response Example
```json
{
  "id": 456
}
```
```

--------------------------------

### FlutterShellArgs Initialization

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterShellArgs/classes/FlutterShellArgs.md

Constructor and property management for Flutter shell command-line arguments.

```APIDOC
## CONSTRUCTOR FlutterShellArgs

### Description
Initializes a new instance of the FlutterShellArgs class to manage engine arguments.

### Method
NEW

### Parameters
- **None**

### Request Example
```javascript
const shellArgs = new FlutterShellArgs();
```

### Response
- **returns** (FlutterShellArgs) - An instance of the argument manager.
```

--------------------------------

### setComposingStart

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Sets the start position of the composing text region. A value of -1 clears the composing region.

```APIDOC
## setComposingStart

### Description
Sets the composing region start position.

### Method
Not specified (likely internal)

### Endpoint
Not applicable (function)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

##### newComposingStart
(number) - Required - The new composing start position, or -1 to clear

### Request Example
```json
{
  "newComposingStart": 10
}
```

### Response
#### Success Response (200)
- **void** - This function does not return a value.

#### Response Example
```json
null
```
```

--------------------------------

### Get System Languages

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterNapi/classes/FlutterNapi.md

Retrieves the list of system languages currently configured on the platform.

```typescript
getSystemLanguages(): void;
```

--------------------------------

### FlutterAbilityAndEntryDelegate Constructor

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/ohos/FlutterAbilityAndEntryDelegate/classes/FlutterAbilityAndEntryDelegate.md

Constructs a new FlutterAbilityAndEntryDelegate instance. Optionally takes a Host instance.

```APIDOC
## Constructor FlutterAbilityAndEntryDelegate

### Description
Constructs a new FlutterAbilityAndEntryDelegate instance.

### Method
`new`

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Parameters
#### host
- **host** (`Host`) - Optional - The Host instance.

### Request Example
```json
{
  "host": { /* Host object */ }
}
```

### Response
#### Success Response (200)
- **FlutterAbilityAndEntryDelegate** (`FlutterAbilityAndEntryDelegate`) - A new FlutterAbilityAndEntryDelegate instance.

#### Response Example
```json
{
  "instance": "FlutterAbilityAndEntryDelegate"
}
```
```

--------------------------------

### replace

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Replaces a specified range of text with new content, with options for specifying start and end positions within the replacement text.

```APIDOC
## replace

### Description
Replaces a range of text with new text.

### Method
Not specified (likely internal)

### Endpoint
Not applicable (function)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

##### start
(number) - Required - The start position of the range to replace

##### end
(number) - Required - The end position of the range to replace

##### tb
(String) - Required - The replacement text

##### tbStart
(number) - Required - The start position within the replacement text

##### tbEnd
(number) - Required - The end position within the replacement text

### Request Example
```json
{
  "start": 5,
  "end": 10,
  "tb": "new content",
  "tbStart": 0,
  "tbEnd": 11
}
```

### Response
#### Success Response (200)
- **void** - This function does not return a value.

#### Response Example
```json
null
```
```

--------------------------------

### Full Screen Configuration

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/ohos/FlutterManager/classes/FlutterManager.md

Endpoints to toggle and check the full-screen status of the application.

```APIDOC
## [METHOD] setUseFullScreen

### Description
Configures whether the application should operate in full-screen mode.

### Method
void

### Parameters
#### Request Body
- **use** (boolean) - Required - Whether to use full screen
- **context** (any) - Optional - Optional context

***

## [METHOD] useFullScreen

### Description
Checks the current full-screen mode status.

### Method
GET

### Response
#### Success Response (200)
- **result** (boolean) - True if full screen is enabled, false otherwise
```

--------------------------------

### Manage Multiple Flutter Engines with FlutterEngineGroup (TypeScript)

Source: https://context7.com/smdegz/harmenyflutterdoc/llms.txt

Demonstrates how to use FlutterEngineGroup to create and manage multiple FlutterEngine instances that share resources, leading to reduced memory usage and faster startup times. It covers engine initialization, lifecycle management, and view attachment.

```typescript
// Multi-engine setup with FlutterEngineGroup
import { FlutterEngineGroup, Options } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/FlutterEngineGroup'
import { DartEntrypoint } from '@ohos/flutter_ohos/src/main/ets/embedding/engine/dart/DartExecutor'
import { FlutterManager } from '@ohos/flutter_ohos/src/main/ets/embedding/ohos/FlutterManager'
import { FlutterView } from '@ohos/flutter_ohos/src/main/ets/view/FlutterView'
import { GeneratedPluginRegistrant } from '../plugins/GeneratedPluginRegistrant'
import common from '@ohos.app.ability.common'

// Create a shared engine group instance
const engines = new FlutterEngineGroup()

class EngineBindings {
  private engine?: FlutterEngine
  private context: common.Context
  private flutterView: FlutterView

  constructor(context: common.Context) {
    this.context = context
    this.flutterView = FlutterManager.getInstance().createFlutterView(context)
  }

  getFlutterViewId(): string {
    return this.flutterView.getId()
  }

  async attach(): Promise<void> {
    if (this.engine) return

    // 1. Initialize loader
    await engines.checkLoader(this.context, [])

    // 2. Create engine with options
    const options = new Options(this.context)
      .setDartEntrypoint(DartEntrypoint.createDefault())

    this.engine = await engines.createAndRunEngineByOptions(options)
    if (!this.engine) {
      throw new Error("Failed to create engine")
    }

    // 3. Resume lifecycle
    this.engine.getLifecycleChannel()?.appIsResumed()

    // 4. Attach to ability if available
    const ability = FlutterManager.getInstance().getTopUIAbility()
    if (ability) {
      this.engine.getAbilityControlSurface()?.attachToAbility(ability)
    }

    // 5. Attach view to engine
    this.flutterView.attachToFlutterEngine(this.engine)

    // 6. Register plugins
    GeneratedPluginRegistrant.registerWith(this.engine)
  }

  detach(): void {
    this.flutterView.detachFromFlutterEngine()
    this.engine?.destroy()
    this.engine = undefined
  }
}

```

--------------------------------

### Read Data from ByteBuffer

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/util/ByteBuffer/classes/ByteBuffer.md

Examples of reading various data types from the buffer using specific offsets and endianness configurations.

```typescript
const val = buffer.getInt32(0, true); // Read 32-bit int at offset 0, little-endian
const str = buffer.getString(4, 10, 'utf8'); // Read string at offset 4 with length 10
const isSet = buffer.getBool(14); // Read boolean at offset 14
```

--------------------------------

### Start Deletion Operation

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/ListenableEditingState/classes/ListenableEditingState.md

Initiates a deletion operation, typically triggered by a key code. This function takes a number representing the key code and returns void.

```dart
void startDeleting(int code)
```

--------------------------------

### Initialize and Lifecycle Management for FlutterView

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/view/FlutterView/classes/FlutterView.md

Demonstrates how to instantiate the FlutterView and manage its connection to a Flutter engine. These methods are essential for setting up the rendering surface and cleaning up resources upon destruction.

```TypeScript
const view = new FlutterView("view_id", context);
view.attachToFlutterEngine(engine);

// Cleanup when no longer needed
view.detachToFlutterEngine();
view.onDestroy();
```

--------------------------------

### BinaryCodec.INSTANCE_DIRECT

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/common/BinaryCodec/classes/BinaryCodec.md

Provides a direct instance of BinaryCodec that returns the direct buffer from decoding.

```APIDOC
## BinaryCodec.INSTANCE_DIRECT

### Description
Provides a direct instance of BinaryCodec that returns the direct buffer from decoding. This is a static, read-only property.

### Method
GET

### Endpoint
N/A (Static property)

### Returns
`BinaryCodec`

### Response Example
```json
{
  "instanceType": "BinaryCodec",
  "configuration": {
    "returnsDirectByteBufferFromDecoding": true
  }
}
```
```

--------------------------------

### Manage Flutter Dependencies Offline

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/08_FAQ/environment.md

Use the --offline flag to install dependencies when an active internet connection is unavailable.

```shell
flutter pub get --offline
```

--------------------------------

### System Navigation and Resource Cleanup

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/ohos/FlutterAbility/classes/FlutterAbility.md

Utility methods for handling system navigation requests and releasing allocated resources.

```typescript
function popSystemNavigator(): boolean;
function release(): void;
```

--------------------------------

### Get Texture ID (Dart)

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/renderer/FlutterRenderer/classes/SurfaceTextureRegistryEntry.md

Retrieves the texture ID. This ID is used to reference the texture within the registry.

```dart
getTextureId(): number
```

--------------------------------

### Initialize Flutter Engine

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/FlutterNapi/classes/FlutterNapi.md

Initializes the Flutter engine instance with required paths, context, and configuration arguments.

```typescript
init(context: Context, args: string[], bundlePath: string, appStoragePath: string, engineCachesPath: string, initTimeMillis: number): void;
```

--------------------------------

### View State and Property Access

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/view/FlutterView/classes/FlutterView.md

Provides examples of retrieving the current state of the FlutterView, including active status, surface identification, and keyboard metrics.

```TypeScript
const isActive = view.getActive();
const surfaceId = view.getSurfaceId();
const keyboardHeight = view.getKeyboardHeight();
const isRendered = view.hasRenderedFirstFrame();
```

--------------------------------

### Constructor: TextEditingDelta

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/plugin/editing/TextEditingDelta/classes/TextEditingDelta.md

Initializes a new instance of TextEditingDelta to track changes in text editing state.

```APIDOC
## CONSTRUCTOR TextEditingDelta

### Description
Constructs a new TextEditingDelta instance to track text, selection, and composing region changes.

### Parameters
- **oldEditable** (string) - Required - The text before the change
- **selectionStart** (number) - Required - The new selection start position
- **selectionEnd** (number) - Required - The new selection end position
- **composingStart** (number) - Required - The new composing region start position
- **composingEnd** (number) - Required - The new composing region end position
- **replacementDestinationStart** (number) - Optional - Start position of the replacement destination
- **replacementDestinationEnd** (number) - Optional - End position of the replacement destination
- **replacementSource** (string) - Optional - Replacement text

### Request Example
{
	"oldEditable": "Hello",
	"selectionStart": 5,
	"selectionEnd": 5,
	"composingStart": 0,
	"composingEnd": 0
}
```

--------------------------------

### Initialize FlutterPluginBinding

Source: https://github.com/smdegz/harmenyflutterdoc/blob/main/11_flutter_api_docs/embedding/engine/plugins/FlutterPlugin/classes/FlutterPluginBinding.md

Constructs a new instance of FlutterPluginBinding. This requires the application context, engine instance, binary messenger, assets, and texture registry, with an optional platform view registry.

```java
FlutterPluginBinding binding = new FlutterPluginBinding(
	applicationContext,
	flutterEngine,
	binaryMessenger,
	flutterAssets,
	textureRegistry,
	platformViewRegistry
);
```