java - 为什么我恢复应用程序后 SurfaceView 会被剪切？

Question

如果我使用 Android L 设备并恢复我的应用程序，SurfaceView 将被剪切。

发生条件详情如下:
- 使用Android L(原来是L，未更新为L)
- SurfaceView 大于显示屏。
- SurfaceView 的左上角更靠近显示屏的左侧或顶部。
- 从后台应用程序列表恢复应用程序，而不是应用程序列表中的图标。

我尝试重置大小、重力、剪辑边界等，但是没有效果。
我想修复SurfaceView的切口，你没有什么想法吗？

示例代码如下:

[ Activity ]

public class ViewTestActivity extends Activity {

    private DrawSurfaceView mDrawSurfaceView;
    private int overDispW;
    private int overDispH;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
        Display display = wm.getDefaultDisplay();
        Point dispP = new Point();
        display.getSize(dispP);
        overDispW = (int) (dispP.x * 1.5);
        overDispH = (int) (dispP.y * 1.5);

        FrameLayout.LayoutParams overSizeParams = new FrameLayout.LayoutParams(overDispW, overDispH);

        //If gravity is Gravity.LEFT|Gravity.TOP, there is no cut.
        overSizeParams.gravity = Gravity.CENTER;

        mDrawSurfaceView = new DrawSurfaceView(this);

        setContentView(mDrawSurfaceView, overSizeParams);
    }
}

[SurfaceView]

public class DrawSurfaceView extends SurfaceView implements SurfaceHolder.Callback{

    private Paint mPaintRed;
    private Paint mPaintBlue;
    private Paint mPaintGreen;
    private Paint mPaintYellow;
    private SurfaceHolder mHolder;

    public DrawSurfaceView(Context context) {
        super(context);

        mPaintRed = new Paint();
        mPaintRed.setColor(Color.argb(255, 255, 0, 0));

        mPaintBlue = new Paint();
        mPaintBlue.setColor(Color.argb(255, 0, 0, 255));

        mPaintGreen = new Paint();
        mPaintGreen.setColor(Color.argb(255, 0, 255, 0));

        mPaintYellow = new Paint();
        mPaintYellow.setColor(Color.argb(255, 255, 255, 0));

        mHolder = getHolder();
        mHolder.setFormat(PixelFormat.RGBA_8888);
        mHolder.addCallback(this);
    }

    public void onDraw(Canvas canvas){
        super.onDraw(canvas);
        drawRect(canvas);
    }

    private void drawRect(Canvas canvas) {
        int w = canvas.getWidth();
        int h = canvas.getHeight();
        canvas.drawColor(Color.TRANSPARENT, Mode.CLEAR);
        canvas.drawRect(0, 0, w/2, h/2, mPaintRed);
        canvas.drawRect(w/2, h/2, w, h, mPaintBlue);
        canvas.drawRect(w/2, 0, w, h/2, mPaintGreen);
        canvas.drawRect(0, h/2, w/2, h, mPaintYellow);
    }

    public void doDraw(){
        Canvas canvas = mHolder.lockCanvas();
        if(canvas != null){
            drawRect(canvas);
            mHolder.unlockCanvasAndPost(canvas);
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        doDraw();
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        doDraw();
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
    }
}

Answer 1

右侧 View 已被剪切。