添加到WindowManager中的自定義視圖的動畫

Question

我有一個自定義視圖插入到窗口管理器的拖動功能，並覆蓋了OnDraw()方法。我正在嘗試使用翻譯動畫對其進行動畫製作，但動畫無法啓動（也就是animationListener不捕捉動畫），而是從動畫的起點到終點的視圖「跳轉」。

這是自定義視圖：

public class DragView extends View { 
@Override 
protected void onAnimationEnd() { 
    // TODO Auto-generated method stub 
    super.onAnimationEnd(); 
} 

@Override 
protected void onAnimationStart() { 
    // TODO Auto-generated method stub 
    super.onAnimationStart(); 
} 

// Number of pixels to add to the dragged item for scaling. Should be even 
// for pixel alignment. 
private static final int DRAG_SCALE = 0; // In Launcher, value is 40 

public Bitmap mBitmap; 
public Paint mPaint; 
public int mRegistrationX; 
public int mRegistrationY; 
public Context context; 

private float mAnimationScale = 1.0f; 

private WindowManager.LayoutParams mLayoutParams; 
private WindowManager mWindowManager; 


public DragView(Context context, Bitmap bitmap, int registrationX, int registrationY, int left, int top, int width, int height,boolean animated) { 
    super(context); 

    if (animated) 
     return; 


    this.context = context; 
    // mWindowManager = WindowManagerImpl.getDefault(); 
    mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); 

    Matrix scale = new Matrix(); 
    float scaleFactor = width; 
    scaleFactor = (scaleFactor + DRAG_SCALE)/scaleFactor; 
    scale.setScale(scaleFactor, scaleFactor); 
    mBitmap = Bitmap.createBitmap(bitmap, left, top, width, height, scale, true); 

    // The point in our scaled bitmap that the touch events are located 
    mRegistrationX = registrationX + (DRAG_SCALE/2); 
    mRegistrationY = registrationY + (DRAG_SCALE/2); 
} 

@Override 
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    setMeasuredDimension(mBitmap.getWidth(), mBitmap.getHeight()); 
} 


@Override 
protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    float scale = mAnimationScale; 
    if (scale < 0.999f) { // allow for some float error 
     float width = mBitmap.getWidth(); 
     float offset = (width - (width * scale))/2; 
     canvas.translate(offset, offset); 
     canvas.scale(scale, scale); 
    } 
    canvas.drawBitmap(mBitmap, 0.0f, 0.0f, mPaint); 
} 

@Override 
protected void onDetachedFromWindow() { 
    super.onDetachedFromWindow(); 
    mBitmap.recycle(); 
} 

public void setPaint(Paint paint) { 
    mPaint = paint; 
    invalidate(); 
} 


public void show(IBinder windowToken, int touchX, int touchY) { 
    final WindowManager.LayoutParams lp; 
    int pixelFormat; 

    pixelFormat = PixelFormat.TRANSLUCENT; 

    lp = new WindowManager.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, touchX - mRegistrationX, 
      touchY - mRegistrationY, WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL, WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN 
        | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, pixelFormat); 

    lp.gravity = Gravity.LEFT | Gravity.TOP; 
    lp.token = windowToken; 
    lp.setTitle("DragView"); 
    mLayoutParams = lp; 


    ((FragmentActivity)context).runOnUiThread(new Runnable() { 
     //@Override 
     public void run() { 
      mWindowManager.addView(DragView.this, lp); 
     } 
    }); 

} 


void move(int touchX, int touchY) { 
    // This is what was done in the Launcher code. 
    WindowManager.LayoutParams lp = mLayoutParams; 
    lp.x = touchX - mRegistrationX; 
    lp.y = touchY - mRegistrationY; 
    mWindowManager.updateViewLayout(this, lp); 
} 

void remove() { 
    mWindowManager.removeView(this); 
} 

這是我如何啓動動畫：

TranslateAnimation translate = new TranslateAnimation 
(0, outOfScreenX, 0,outOfScreenY); 
        translate.setDuration(300); 
        translate.setFillAfter(true);   
        mDragView.clearAnimation(); 
        mDragView.startAnimation(translate); 

Answer 1

的「解決方案」這個問題是窗口管理器，是一個全球性的設備組件（例如：拖動的應用程序圖標使用它），它根本不支持動畫。