android view控件的顯示和隱藏動畫效果

// 顯示動畫
mShowAction = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
-1.0f, Animation.RELATIVE_TO_SELF, -0.0f);
mShowAction.setRepeatMode(Animation.REVERSE);
mShowAction.setDuration(500);
// 隱藏動畫
mHiddenAction = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,
-1.0f);
mHiddenAction.setDuration(500);

btn_setting.startAnimation(mShowAction);//開始動畫