Question

我有这个元素：

<View
   android:id="@+id/cameraProgressBar"
   android:layout_width="1dp"
   android:layout_height="15dp" 
   android:background = "#ffffff" 
   android:layout_alignParentBottom="true"/>

和这个动画代码：

mProgressBar = findViewById(R.id.cameraProgressBar);

 private void showGlassProgressBar(final Runnable onAnimationEnd) {

    float screenWidth = myManager.GetScreenWidth();


    ScaleAnimation scaleAnim = new ScaleAnimation(1F, screenWidth, // Start and end values for the X
                                                                   // axis
                                                         // scaling
        1F, 1F, // Start and end values for the Y axis scaling
        Animation.RELATIVE_TO_SELF, 1f, // Pivot point of X scaling
        Animation.RELATIVE_TO_SELF, 0f); // Pivot point of Y scaling

    scaleAnim.setFillAfter(true); // Needed to keep the result of the animation
    scaleAnim.setAnimationListener(new AnimationListener() {

      @Override
      public void onAnimationStart(Animation animation) {
        // TODO Auto-generated method stub

      }

      @Override
      public void onAnimationRepeat(Animation animation) {
        // TODO Auto-generated method stub

      }

      @Override
      public void onAnimationEnd(Animation animation) {
        AppService.Post(onAnimationEnd);

      }
    });    
    scaleAnim.setInterpolator(new LinearInterpolator());
    scaleAnim.setDuration(3 * 1000);
    mProgressBar.startAnimation(scaleAnim);

  }

我想将一个dp点延长到一个完整的行（x asix）

但是动画结束了，没有看到任何内容。

Answer 1

签名是X-scale（开始，结束）和Y-scale。

表示没有绝对X尺寸screenWidth

更好的改变：

ScaleAnimation scaleAnim = new ScaleAnimation(1F, screenWidth, 
    1F, 1F,
    Animation.RELATIVE_TO_SELF, 1f, // Pivot point of X scaling
    Animation.RELATIVE_TO_SELF, 0f); // Pivot point of Y scaling

使用：

    ScaleAnimation scaleAnim = new ScaleAnimation((float) 0.0, (float) 1.0,
    1F, 1F,
    Animation.RELATIVE_TO_SELF, 0f, // Pivot point of X scaling
    Animation.RELATIVE_TO_SELF, 0f); // Pivot point of Y scaling

我的比例动画不起作用

1 个答案: