PixelCopy 将 Surface 转成 Bitmap

PixelCopy 是 Android 8.0 新增的类，支持传入 Surface/Window。生成的截图包含阴影裁剪

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public static void request(@NonNull Surface source, @Nullable Rect srcRect,
            @NonNull Bitmap dest, @NonNull OnPixelCopyFinishedListener listener,
            @NonNull Handler listenerThread) 

public static void request(@NonNull Window source, @Nullable Rect srcRect,
            @NonNull Bitmap dest, @NonNull OnPixelCopyFinishedListener listener,
            @NonNull Handler listenerThread)
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public static void convertLayoutToBitmap(Activity activity, OnConvertBitmapListener listener) {
    if (activity == null || activity.isFinishing()) {
        return;
    }
    Window window = activity.getWindow();
    View view = window.getDecorView();
    Rect rect = new Rect(0, 0, view.getWidth(), view.getHeight());
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        Bitmap dest = Bitmap.createBitmap(rect.width(), rect.height(), Bitmap.Config.RGB_565);
        android.view.PixelCopy.request(window, rect, dest, new PixelCopy.OnPixelCopyFinishedListener() {
            @Override
            public void onPixelCopyFinished(int copyResult) {
                if (copyResult ==  android.view.PixelCopy.SUCCESS) {
                    listener.onSuccess(dest);
                }else {
                    listener.onFailure();
                }
            }
        }, new Handler(Looper.getMainLooper()));
    }else{
        listener.onSuccess(getBitmapFromView(view));
    }
}

 public static Bitmap getBitmapFromView(View v) {
    if (null == v) {
        return null;
    }
    v.setDrawingCacheEnabled(true); //注意child 如果设置了 enable可能会导致获取的截图不更新。可循环遍历看看是哪个 view
    Bitmap drawingCache = v.getDrawingCache();
    Bitmap bitmap = Bitmap.createBitmap(drawingCache);
    v.setDrawingCacheEnabled(false);
    return bitmap;
}

public interface OnConvertBitmapListener {
    void onSuccess(Bitmap bm);

    void onFailure();
}

8.0 以下版本使用 View.getDrawingCache 来兼容

文章来自： https://hanks.pub