### Load PDF with Options

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Demonstrates loading a PDF file from various sources with a comprehensive set of configuration options. Use this to customize page rendering, swipe behavior, annotations, and more.

```java
pdfView.fromUri(Uri)
or
pdfView.fromFile(File)
or
pdfView.fromBytes(byte[])
or
pdfView.fromStream(InputStream) // stream is written to bytearray - native code cannot use Java Streams
or
pdfView.fromSource(DocumentSource)
or
pdfView.fromAsset(String)
    .pages(0, 2, 1, 3, 3, 3) // all pages are displayed by default
    .enableSwipe(true) // allows to block changing pages using swipe
    .swipeHorizontal(false)
    .enableDoubletap(true)
    .defaultPage(0)
    // allows to draw something on the current page, usually visible in the middle of the screen
    .onDraw(onDrawListener)
    // allows to draw something on all pages, separately for every page. Called only for visible pages
    .onDrawAll(onDrawListener)
    .onLoad(onLoadCompleteListener) // called after document is loaded and starts to be rendered
    .onPageChange(onPageChangeListener)
    .onPageScroll(onPageScrollListener)
    .onError(onErrorListener)
    .onPageError(onPageErrorListener)
    .onRender(onRenderListener) // called after document is rendered for the first time
    // called on single tap, return true if handled, false to toggle scroll handle visibility
    .onTap(onTapListener)
    .onLongPress(onLongPressListener)
    .enableAnnotationRendering(false) // render annotations (such as comments, colors or forms)
    .password(null)
    .scrollHandle(null)
    .enableAntialiasing(true) // improve rendering a little bit on low-res screens
    // spacing between pages in dp. To define spacing color, set view background
    .spacing(0)
    .autoSpacing(false) // add dynamic spacing to fit each page on its own on the screen
    .linkHandler(DefaultLinkHandler)
    .pageFitPolicy(FitPolicy.WIDTH) // mode to fit pages in the view
    .fitEachPage(false) // fit each page to the view, else smaller pages are scaled relative to largest page.
    .pageSnap(false) // snap pages to screen boundaries
    .pageFling(false) // make a fling change only a single page like ViewPager
    .nightMode(false) // toggle night mode
    .load();
```

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

### Configure 16 KB Page Size in sample/build.gradle

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Apply 16 KB page size support configuration to the sample application's build.gradle file. This includes setting packaging options and the NDK version.

```gradle
packagingOptions {
    // ... existing exclusions ...
    
    // 16 KB page size support configuration
    jniLibs {
        useLegacyPackaging false  // Use uncompressed shared libraries for 16 KB alignment
    }
}

// Enable 16 KB page size support for native libraries
ndkVersion "28.0.12433566"  // Use NDK r28+ for 16 KB support
```

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

### Enable 16 KB Page Size Support in gradle.properties

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Configure Gradle properties to enable uncompressed native libraries and full R8 mode for 16 KB page size compatibility.

```properties
# 16 KB page size support
android.bundle.enableUncompressedNativeLibs=false
android.enableR8.fullMode=true
```

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

### Check Device Page Size with ADB

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Use the adb shell command to verify the system's page size on a connected device. The output should be 16384 for 16 KB support.

```bash
adb shell getconf PAGE_SIZE
# Should return 16384
```

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

### Verify 16 KB Alignment on Windows PowerShell

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Execute the provided PowerShell script to verify the 16 KB alignment of your APK on Windows.

```powershell
.\check_16kb_alignment.ps1 -ApkFile "sample\build\outputs\apk\debug\sample-debug.apk"
```

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

### Run Realignment Script

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Execute the realignment script on a copied APK to fix potential 16 KB alignment issues.

```batch
.\realign_apk.bat "sample-debug-copy.apk"
```

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

### Configure 16 KB Page Size in android-pdf-viewer/build.gradle

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Configure packaging options and NDK version for 16 KB page size support in the main library's build.gradle file. Ensure uncompressed shared libraries are used for proper alignment.

```gradle
// 16 KB page size support configuration
packagingOptions {
    jniLibs {
        useLegacyPackaging false  // Use uncompressed shared libraries for 16 KB alignment
    }
}

// Enable 16 KB page size support for native libraries
ndkVersion "28.0.12433566"  // Use NDK r28+ for 16 KB support
```

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

### Manual APK Alignment Check

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Perform a manual check of APK alignment using the zipalign tool with specific flags. Ensure the APK is properly aligned for 16 KB page sizes.

```bash
zipalign -c -p -v 4 your-app.apk
```

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

### Verify 16 KB Alignment on Windows Batch Script

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Run the provided Windows batch script to check the 16 KB alignment of your APK.

```batch
.\realign_apk.bat "sample\build\outputs\apk\debug\sample-debug.apk"
```

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

### Fix 16 KB Page Size Alignment (Windows)

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Use this batch script on Windows to realign your APK for 16 KB page sizes if it fails the verification checks.

```batch
.\realign_apk.bat "your-app.apk"
```

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

### Verify Realignment Fix

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

After running the realignment script, use zipalign to verify that the APK now meets the 16 KB alignment requirements.

```bash
zipalign -c -p -v 4 sample-debug-copy.apk
```

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

### Verify 16 KB Alignment on Linux/macOS

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Use the provided shell script to check the 16 KB alignment of your APK on Linux or macOS systems.

```bash
./check_16kb_alignment.sh sample/build/outputs/apk/debug/sample-debug.apk
```

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

### Verify 16 KB Alignment using Python Script

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Utilize the cross-platform Python script to verify the 16 KB alignment of your APK.

```python
python fix_16kb_alignment.py "sample/build/outputs/apk/debug/sample-debug.apk"
```

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

### Copy APK for Realignment

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/16KB_SUPPORT.md

Create a copy of your APK before running realignment scripts to avoid potential file lock issues.

```bash
cp sample/build/outputs/apk/debug/sample-debug.apk sample-debug-copy.apk
```

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

### Fit Document to Screen Width

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Renders a specific page to fit the screen width, useful for orientation changes. This should be used within the onInitiallyRendered callback.

```java
Configurator.onRender(new OnRenderListener() {
    @Override
    public void onInitiallyRendered(int pages, float pageWidth, float pageHeight) {
        pdfView.fitToWidth(pageIndex);
    }
});
```

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

### Load PDF from Different Sources

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Shorthand methods for loading PDF documents from various sources like URI, File, byte array, InputStream, or assets.

```java
pdfView.fromUri(Uri)
```

```java
pdfView.fromFile(File)
```

```java
pdfView.fromBytes(byte[])
```

```java
pdfView.fromStream(InputStream)
```

```java
pdfView.fromAsset(String)
```

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

### Configure Single Page Scrolling

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Enables ViewPager-like scrolling and snapping behavior for single pages. Use these settings to achieve a smooth page-turning effect.

```java
.swipeHorizontal(true)
.pageSnap(true)
.autoSpacing(true)
.pageFling(true)
```

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

### Add Android PDF Viewer Dependency

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Include this dependency in your app's build.gradle file to use the library. Choose the latest beta or a stable version.

```gradle
implementation 'com.github.barteksc:android-pdf-viewer:3.2.0-beta.1'
```

```gradle
implementation 'com.github.barteksc:android-pdf-viewer:2.8.2'
```

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

### Set Page Fit Policy

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Configure the page fitting policy to control how pages are scaled to fit the view. Options include fitting by width, height, or both.

```java
.pageFitPolicy(FitPolicy.WIDTH)
```

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

### ProGuard Configuration for PDF Viewer

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

If you are using ProGuard for code shrinking, add this rule to your ProGuard configuration file to prevent issues with the library.

```proguard
-keep class com.shockwave.**
```

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

### Set Zoom Levels

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Allows customization of the minimum, mid, and maximum zoom levels for double-tap zooming.

```java
void setMinZoom(float zoom);
void setMidZoom(float zoom);
void setMaxZoom(float zoom);
```

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

### Set Custom Link Handler

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Set a custom link handler to manage link behavior within the PDF document. Implement the LinkHandler interface for custom actions.

```java
.linkHandler(LinkHandler)
```

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

### Register Default Scroll Handle

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Register the default scroll handle implementation. This can be placed on the right/bottom or left/top by providing a boolean argument to the constructor.

```java
.scrollHandle(new DefaultScrollHandle(this))
```

```java
new DefaultScrollHandle(this, true)
```

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

### Include PDFView in Layout

Source: https://github.com/dimuthuupe/androidpdfviewer/blob/master/README.md

Add the PDFView widget to your Android XML layout file to display PDF documents. It supports matching parent dimensions.

```xml
<com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
```

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