### Manage and Match Resource Configurations in Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Shows how to define device configurations such as locale, density, and screen layout using ResTableConfig. It includes methods for matching configurations and determining the best match for a given request.

```go
package main

import (
	"fmt"

	"github.com/shogo82148/androidbinary"
)

func main() {
	// Create configuration for English (US)
	configEN := &androidbinary.ResTableConfig{
		Language: [2]uint8{'e', 'n'},
		Country:  [2]uint8{'U', 'S'},
	}

	// Create configuration for Japanese
	configJA := &androidbinary.ResTableConfig{
		Language: [2]uint8{'j', 'a'},
	}

	// Create configuration for high-density screen
	configHDPI := &androidbinary.ResTableConfig{
		Density: 240, // HDPI
	}

	// Create configuration for tablet
	configTablet := &androidbinary.ResTableConfig{
		ScreenLayout: androidbinary.ScreenSizeLarge,
		ScreenWidthDp: 600,
	}

	// Check locale string
	fmt.Printf("EN-US Locale: %s\n", configEN.Locale())
	fmt.Printf("JA Locale: %s\n", configJA.Locale())

	// Test configuration matching
	resourceConfig := &androidbinary.ResTableConfig{
		Language: [2]uint8{'e', 'n'},
	}

	if resourceConfig.Match(configEN) {
		fmt.Println("EN resource matches EN-US request")
	}

	// Compare configurations for best match
	config1 := &androidbinary.ResTableConfig{Language: [2]uint8{'e', 'n'}}
	config2 := &androidbinary.ResTableConfig{}
	requestConfig := &androidbinary.ResTableConfig{
		Language: [2]uint8{'e', 'n'},
		Country:  [2]uint8{'U', 'S'},
	}

	if config1.IsBetterThan(config2, requestConfig) {
		fmt.Println("EN config is better than default for EN-US request")
	}

	// Check specificity
	if config1.IsMoreSpecificThan(config2) {
		fmt.Println("EN config is more specific than empty config")
	}

	fmt.Printf("HDPI Density: %d\n", configHDPI.Density)
	fmt.Printf("Tablet Screen Width: %ddp\n", configTablet.ScreenWidthDp)
}
```

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

### Parse APK Files - Go

Source: https://github.com/shogo82148/androidbinary/blob/main/README.md

Demonstrates how to open an APK file and extract its icon and package name using the high-level API. It also shows how to retrieve the application label for a specific language.

```Go
package main

import (
	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	pkg, _ := apk.OpenFile("your-android-app.apk")
	defer pkg.Close()

	icon, _ := pkg.Icon(nil) // returns the icon of APK as image.Image
	pkgName := pkg.PackageName() // returns the package name

	resConfigEN := &androidbinary.ResTableConfig{
		Language: [2]uint8{uint8('e'), uint8('n')},
	}
	appLabel, _ = pkg.Label(resConfigEN) // get app label for en translation
}
```

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

### Parse Binary XML Files - Go

Source: https://github.com/shogo82148/androidbinary/blob/main/README.md

Illustrates how to parse a binary XML file, such as AndroidManifest.xml, using the low-level API. It involves opening the file, creating an XML file reader, and unmarshalling the data into a manifest structure.

```Go
package main

import (
	"encoding/xml"
	"os"
	"io/ioutil"

	"github.com/shogo82148/androidbinary"
	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	f, _ := os.Open("AndroidManifest.xml")
	xmlFile, _ := androidbinary.NewXMLFile(f)
	reader := xmlFile.Reader()

	// read XML from reader
	var manifest apk.Manifest
	data, _ := ioutil.ReadAll(reader)
	xmlFile.Unmarshal(data, &manifest)
}
```

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

### Parse APK File and Extract Metadata (Go)

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Opens an APK file from the filesystem, parses its contents, and extracts metadata like package name, version, SDK info, app label, main activity, and icon. It uses the `apk.OpenFile` function and handles potential errors during file operations and data extraction. Dependencies include standard Go libraries and the androidbinary package.

```Go
package main

import (
	"fmt"
	"image/png"
	"os"

	"github.com/shogo82148/androidbinary"
	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	// Open the APK file
	pkg, err := apk.OpenFile("myapp.apk")
	if err != nil {
		fmt.Printf("Error opening APK: %v\n", err)
		return
	}
	defer pkg.Close()

	// Get basic package information
	packageName := pkg.PackageName()
	fmt.Printf("Package Name: %s\n", packageName)

	// Get the manifest for detailed information
	manifest := pkg.Manifest()
	versionCode, _ := manifest.VersionCode.Int32()
	versionName, _ := manifest.VersionName.String()
	fmt.Printf("Version: %s (%d)\n", versionName, versionCode)

	// Get SDK information
	minSDK, _ := manifest.SDK.Min.Int32()
	targetSDK, _ := manifest.SDK.Target.Int32()
	fmt.Printf("SDK: min=%d, target=%d\n", minSDK, targetSDK)

	// Get app label with locale configuration
	resConfigEN := &androidbinary.ResTableConfig{
		Language: [2]uint8{'e', 'n'},
	}
	label, err := pkg.Label(resConfigEN)
	if err != nil {
		fmt.Printf("Error getting label: %v\n", err)
	} else {
		fmt.Printf("App Label (EN): %s\n", label)
	}

	// Get the main activity
	mainActivity, err := pkg.MainActivity()
	if err != nil {
		fmt.Printf("No main activity found: %v\n", err)
	} else {
		fmt.Printf("Main Activity: %s\n", mainActivity)
	}

	// Extract app icon and save to file
	icon, err := pkg.Icon(nil)
	if err != nil {
		fmt.Printf("Error getting icon: %v\n", err)
	} else {
		iconFile, _ := os.Create("app_icon.png")
		defer iconFile.Close()
		png.Encode(iconFile, icon)
		fmt.Println("Icon saved to app_icon.png")
	}
}
```

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

### Decode Binary XML with Resource Resolution in Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Demonstrates how to extract and decode Android binary XML files (like AndroidManifest.xml) from an APK. It uses a resource table and specific configuration to resolve resource references into human-readable values.

```go
package main

import (
	"archive/zip"
	"bytes"
	"fmt"
	"io"
	"os"

	"github.com/shogo82148/androidbinary"
	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	// Open APK as zip
	f, _ := os.Open("myapp.apk")
	defer f.Close()
	fi, _ := f.Stat()
	zr, _ := zip.NewReader(f, fi.Size())

	// Read resources.arsc
	var tableFile *androidbinary.TableFile
	for _, zf := range zr.File {
		if zf.Name == "resources.arsc" {
			rc, _ := zf.Open()
			data, _ := io.ReadAll(rc)
			rc.Close()
			tableFile, _ = androidbinary.NewTableFile(bytes.NewReader(data))
			break
		}
	}

	// Read and parse AndroidManifest.xml
	for _, zf := range zr.File {
		if zf.Name == "AndroidManifest.xml" {
			rc, _ := zf.Open()
			data, _ := io.ReadAll(rc)
			rc.Close()

			xmlFile, _ := androidbinary.NewXMLFile(bytes.NewReader(data))

			// Configure for German locale
			config := &androidbinary.ResTableConfig{
				Language: [2]uint8{'d', 'e'},
				Country:  [2]uint8{'D', 'E'},
			}

			// Decode with resource resolution
			var manifest apk.Manifest
			err := xmlFile.Decode(&manifest, tableFile, config)
			if err != nil {
				fmt.Printf("Decode error: %v\n", err)
				return
			}

			// Access resolved values
			label, _ := manifest.App.Label.String()
			fmt.Printf("App Label (DE): %s\n", label)

			// Values automatically resolve resource references
			for _, activity := range manifest.App.Activities {
				name, _ := activity.Name.String()
				actLabel, _ := activity.Label.String()
				fmt.Printf("Activity: %s (label: %s)\n", name, actLabel)
			}
			break
		}
	}
}
```

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

### Parse APK from io.ReaderAt and Extract Metadata (Go)

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Opens an APK file from an `io.ReaderAt` interface, such as a byte slice representing data from memory or a network stream. It parses the APK and extracts metadata like package name, version code, and permissions. This method is useful when the APK is not directly available as a file on disk. Dependencies include standard Go libraries and the androidbinary package.

```Go
package main

import (
	"bytes"
	"fmt"
	"io"
	"os"

	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	// Read APK into memory (simulating a network download or database blob)
	data, err := os.ReadFile("myapp.apk")
	if err != nil {
		fmt.Printf("Error reading file: %v\n", err)
		return
	}

	// Create a ReaderAt from the byte slice
	reader := bytes.NewReader(data)

	// Open APK using OpenZipReader
	pkg, err := apk.OpenZipReader(reader, int64(len(data)))
	if err != nil {
		fmt.Printf("Error parsing APK: %v\n", err)
		return
	}
	// Note: Close() is not required when using OpenZipReader

	// Access APK metadata
	fmt.Printf("Package: %s\n", pkg.PackageName())
	manifest := pkg.Manifest()
	fmt.Printf("Version Code: %d\n", manifest.VersionCode.MustInt32())

	// List permissions
	fmt.Println("Permissions:")
	for _, perm := range manifest.UsesPermissions {
		permName, _ := perm.Name.String()
		fmt.Printf("  - %s\n", permName)
	}
}
```

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

### Access Android Manifest Data with Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Demonstrates how to use the Manifest struct to access application metadata, activities, permissions, and SDK requirements from an APK's AndroidManifest.xml. It provides strongly-typed access to various manifest elements.

```go
package main

import (
	"fmt"

	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	pkg, err := apk.OpenFile("myapp.apk")
	if err != nil {
		fmt.Printf("Error: %v\n", err)
		return
	}
	defer pkg.Close()

	manifest := pkg.Manifest()

	// Application metadata
	app := manifest.App
	debuggable, _ := app.Debuggable.Bool()
	allowBackup, _ := app.AllowBackup.Bool()
	fmt.Printf("Debuggable: %v\n", debuggable)
	fmt.Printf("Allow Backup: %v\n", allowBackup)

	// List all activities
	fmt.Println("\nActivities:")
	for _, activity := range app.Activities {
		name, _ := activity.Name.String()
		fmt.Printf("  - %s\n", name)

		// Check intent filters
		for _, filter := range activity.IntentFilters {
			for _, action := range filter.Actions {
				actionName, _ := action.Name.String()
				fmt.Printf("      Action: %s\n", actionName)
			}
		}
	}

	// List metadata
	fmt.Println("\nMeta-data:")
	for _, meta := range app.MetaData {
		name, _ := meta.Name.String()
		value, _ := meta.Value.String()
		fmt.Printf("  %s = %s\n", name, value)
	}

	// List required permissions
	fmt.Println("\nRequired Permissions:")
	for _, perm := range manifest.UsesPermissions {
		name, _ := perm.Name.String()
		fmt.Printf("  - %s\n", name)
	}
}

```

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

### Parse and Decompose Android Resource IDs in Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Demonstrates how to validate, parse, and decompose Android resource identifiers (ResID) into package, type, and entry indices. It also shows how to instantiate a custom ResID object.

```go
package main

import (
	"fmt"

	"github.com/shogo82148/androidbinary"
)

func main() {
	// Check if a string represents a resource ID
	refString := "@0x7F040001"
	if androidbinary.IsResID(refString) {
		fmt.Printf("%s is a resource ID reference\n", refString)
	}

	// Parse a resource ID from string
	resID, err := androidbinary.ParseResID(refString)
	if err != nil {
		fmt.Printf("Error parsing ResID: %v\n", err)
		return
	}

	// Decompose the resource ID
	fmt.Printf("Resource ID: %s\n", resID.String())
	fmt.Printf("  Package Index: 0x%02X\n", resID.Package())
	fmt.Printf("  Type Index: 0x%02X\n", resID.Type())
	fmt.Printf("  Entry Index: 0x%04X\n", resID.Entry())

	// Create a resource ID directly
	customID := androidbinary.ResID(0x7F020003)
	fmt.Printf("\nCustom ID: %s\n", customID.String())
	fmt.Printf("  Package: %d, Type: %d, Entry: %d\n",
		customID.Package(), customID.Type(), customID.Entry())
}
```

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

### Parse Android Resource Table Files with Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Demonstrates using androidbinary.NewTableFile to parse Android resource table files (resources.arsc). It allows looking up string resources, drawables, and other resource values by their IDs, supporting specific locale configurations.

```go
package main

import (
	"fmt"
	"os"

	"github.com/shogo82148/androidbinary"
)

func main() {
	// Open the resources.arsc file
	f, err := os.Open("resources.arsc")
	if err != nil {
		fmt.Printf("Error opening file: %v\n", err)
		return
	}
	defer f.Close()

	// Parse the resource table
	tableFile, err := androidbinary.NewTableFile(f)
	if err != nil {
		fmt.Printf("Error parsing resource table: %v\n", err)
		return
	}

	// Look up a resource by ID (e.g., app_name string resource)
	// Resource IDs are in format 0xPPTTEEEE where PP=package, TT=type, EEEE=entry
	resourceID := androidbinary.ResID(0x7f040000)

	// Get resource with default configuration
	value, err := tableFile.GetResource(resourceID, nil)
	if err != nil {
		fmt.Printf("Error getting resource: %v\n", err)
		return
	}
	fmt.Printf("Resource 0x%08X: %v\n", uint32(resourceID), value)

	// Get resource with specific locale configuration
	configJP := &androidbinary.ResTableConfig{
		Language: [2]uint8{'j', 'a'},
		Country:  [2]uint8{'J', 'P'},
	}
	valueJP, err := tableFile.GetResource(resourceID, configJP)
	if err == nil {
		fmt.Printf("Resource (ja-JP): %v\n", valueJP)
	}

	// Get string from string pool by reference
	stringRef := androidbinary.ResStringPoolRef(0)
	str := tableFile.GetString(stringRef)
	fmt.Printf("String at ref 0: %s\n", str)
}

```

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

### Parse Resource Files - Go

Source: https://github.com/shogo82148/androidbinary/blob/main/README.md

Shows how to parse a resource file (resources.arsc) and retrieve specific resources by their ID. This uses the low-level API for interacting with Android resource tables.

```Go
package main

import (
	"fmt"
	"os"
	"github.com/shogo82148/androidbinary"
)

func main() {
	f, _ := os.Open("resources.arsc")
	rsc, _ := androidbinary.NewTableFile(f)
	resource, _ := rsc.GetResource(androidbinary.ResID(0xCAFEBABE), nil)
	fmt.Println(resource)
}
```

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

### Parse Binary XML Files to Standard XML with Go

Source: https://context7.com/shogo82148/androidbinary/llms.txt

Utilizes androidbinary.NewXMLFile to parse compiled binary XML files into a standard XML format. It supports reading raw XML content, decoding into Go structs with resource resolution, and using Go's standard xml.Decoder.

```go
package main

import (
	"encoding/xml"
	"fmt"
	"io"
	"os"

	"github.com/shogo82148/androidbinary"
	"github.com/shogo82148/androidbinary/apk"
)

func main() {
	// Open a binary AndroidManifest.xml file
	f, err := os.Open("AndroidManifest.xml")
	if err != nil {
		fmt.Printf("Error opening file: %v\n", err)
		return
	}
	defer f.Close()

	// Parse the binary XML
	xmlFile, err := androidbinary.NewXMLFile(f)
	if err != nil {
		fmt.Printf("Error parsing binary XML: %v\n", err)
		return
	}

	// Get a reader for the converted XML text
	reader := xmlFile.Reader()

	// Option 1: Read raw XML content
	rawXML, _ := io.ReadAll(reader)
	fmt.Println("Raw XML:")
	fmt.Println(string(rawXML))

	// Option 2: Decode into struct using Decode method (with resource resolution)
	f.Seek(0, 0)
	xmlFile2, _ := androidbinary.NewXMLFile(f)
	var manifest apk.Manifest
	err = xmlFile2.Decode(&manifest, nil, nil)
	if err != nil {
		fmt.Printf("Error decoding: %v\n", err)
		return
	}
	fmt.Printf("\nDecoded Package: %s\n", manifest.Package.MustString())

	// Option 3: Use standard xml.Decoder
	f.Seek(0, 0)
	xmlFile3, _ := androidbinary.NewXMLFile(f)
	decoder := xml.NewDecoder(xmlFile3.Reader())
	var manifest2 apk.Manifest
	decoder.Decode(&manifest2)

	// Pretty print the result
	encoder := xml.NewEncoder(os.Stdout)
	encoder.Indent("", "  ")
	encoder.Encode(manifest2)
}

```

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