Question

我有一个自定义平铺视图，直到最近才基于SurfaceView。我现在已将其更改为扩展TextureView。

基本上我在瓦片中得到一个大图像。

我需要捕获屏幕的所有内容并将其保存为位图，该位图适用于包括SurfaceView在内的所有视图。但是，当我现在使用相同的方法时，TextureView的区域是黑色的。我已经读到这与硬件加速有关。

有没有办法捕捉纹理视图的图像？以下是截屏方法。

public File takeScreenShot(View contentView)
{
    File result = null;

    String mPath = this.cacheDir + "/screenshot.png";
    File imageFile = new File(mPath);
    if (imageFile.exists()) {
        imageFile.delete();
        Log.i("ImageManager","Old screenshot image was deleted");
    }

    // create bitmap screen capture
    Bitmap bitmap;
    View v1 = contentView;
    v1.setDrawingCacheEnabled(true);
    v1.setDrawingCacheBackgroundColor(Color.WHITE);
    bitmap = Bitmap.createBitmap(v1.getDrawingCache());
    v1.setDrawingCacheEnabled(false);

    OutputStream outputStream = null;

    try {
        outputStream = new FileOutputStream(imageFile);
        bitmap.compress(Bitmap.CompressFormat.PNG, 90, outputStream);
        outputStream.flush();
        outputStream.close();
        result = imageFile;

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return result;
}

编辑：新的尝试获取所有TextureViews并调用getBitmap。这是有效的，但是将它们置于较大位图的顶部看起来并不是TilingView自身的坐标或者getLocation OnScreen（）或getLocationInWindow（）。

public List<TilingTextureView> getAllTextureViews(View view)
{
    List<TilingTextureView> tilingViews = new ArrayList<TilingTextureView>();
    if (view instanceof TilingTextureView) {
        tilingViews.add((TilingTextureView)view);
    }
    else if(view instanceof ViewGroup)
    {
        ViewGroup viewGroup = (ViewGroup)view;
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            tilingViews.addAll(getAllTextureViews(viewGroup.getChildAt(i)));
        }
    }
return tilingViews;
}

在获取整个视图的屏幕截图后，在takeScreenShot方法中添加此位。

List<TilingTextureView> tilingViews = getAllTextureViews(contentView);
if (tilingViews.size() > 0) {
    Canvas canvas = new Canvas(bitmap);
    for (TilingTextureView tilingTextureView : tilingViews) {
        Bitmap b = tilingTextureView.getBitmap(tilingTextureView.getWidth(), tilingTextureView.getHeight());
        int[] location = new int[2];
        tilingTextureView.getLocationInWindow(location);
        int[] location2 = new int[2];
        tilingTextureView.getLocationOnScreen(location2);
        canvas.drawBitmap(b, location[0], location[1], null);
    }
}

Answer 1

有些事需要注意：

Bitmap textureViewBitmap = textureView.getBitmap();

View v1 = getWindow().getDecorView().getRootView();
v1.setDrawingCacheEnabled(true);
v1.setDrawingCacheBackgroundColor(Color.TRANSPARENT);
Bitmap viewBitmap = Bitmap.createBitmap(v1.getDrawingCache());
viewBitmap.setHasAlpha(true);
v1.setDrawingCacheEnabled(false);

Canvas canvas = new Canvas(textureViewBitmap);
canvas.drawBitmap(viewBitmap, 0, 0, paint);

FileOutputStream outputStream = new FileOutputStream(imageFileDest);
int quality = 100;
cameraBitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
outputStream.flush();
outputStream.close();

假设textureView是全屏的，只有一个。如果您希望覆盖视图覆盖TextureView，viewBitmap.setHasAlpha(true);很重要，否则组合位图在＆＃34; textureView部分＆＃34;上仍然是黑色的。

屏幕截图使用DrawingCache，TextureView是黑色的

1 个答案: