Android: TextView添加图片(drawable)及动画实例(2)

/*  drawable 转换成bitmap */
    private Bitmap drawableToBitmap(Drawable drawable)
    {
              int width = drawable.getIntrinsicWidth(); 
              int height = drawable.getIntrinsicHeight();
             
              // 取drawable的颜色格式
              Bitmap.Config config =
               drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                 : Bitmap.Config.RGB_565; 
              // 建立对应bitmap
              Bitmap bitmap = Bitmap.createBitmap(width, height, config);
              // 建立对应bitmap的画布
              Canvas canvas = new Canvas(bitmap);        
              drawable.setBounds(0, 0, width, height);
              // 把drawable内容画到画布中
              drawable.draw(canvas);    
              return bitmap;
    }
}

3、定义动画文件

accelerate_interpolator.xml

<?xml version="1.0" encoding="utf-8"?>
<accelerateInterpolator />

decelerate_interpolator.xml

<?xml version="1.0" encoding="utf-8"?>

<decelerateInterpolator />

status_view_enter.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@anim/decelerate_interpolator">
 <translate android:fromYDelta="75%" android:toYDelta="0"
        android:duration="1000"/>
 <alpha android:fromAlpha="0.0" android:toAlpha="1.0"
        android:duration="1000" />
</set>

status_view_exit.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@anim/accelerate_interpolator">
 <translate android:fromYDelta="0" android:toYDelta="75%"
        android:startOffset="100" android:duration="1000"/>
 <alpha android:fromAlpha="1.0" android:toAlpha="0.0"
        android:startOffset="100" android:duration="1000" />
</set>

说明：zoomDrawable()方法和drawableToBitmap()来源网络。