为什么不TextView的成为无形？

下面是我的布局XML：

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：layout_width =match_parent
    机器人：layout_height =match_parent
    机器人：方向=垂直＆GT;

    ＆LT;的TextView
    机器人：ID =@ + ID / tvRotate
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：文本=旋转我
/＆GT;
＆LT; / LinearLayout中＆GT;
 

..这里是我的活动：

 公共类RotateMeActivity扩展活动
{
    @覆盖
    公共无效的onCreate（包savedInstanceState）
    {
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;
        TextView的tvRotate =（TextView中）findViewById（R.id.tvRotate）;

        RotateAnimation R =新RotateAnimation（0，180，Animation.RELATIVE_TO_SELF，0.5F，Animation.RELATIVE_TO_SELF，0.5F）;
        r.setDuration（0）;
        r.setFillAfter（真正的）;
        tvRotate.startAnimation（r）的;
        tvRotate.setVisibility（View.INVISIBLE）;
    }
}
 

我的目标是旋转视图，然后能够隐藏并通过设置setVisibility它显示在code。下面的工作，但setRotation仅在API级别11.我需要一种方法来做到这一点在API级别10。

  tvRotate.setRotation（180）; //而非RotateAnimation，仅适用于API级别11
tvRotate.setVisibility（View.INVISIBLE）;
 

解决方案

有关我叫 clearAnimation 视图的解决了这一问题。在我来说，我希望做一个翻译后的视图设置回原来的位置与fillAfter设置为true。

Why doesn't the textView become invisible?

Here is my layout xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
    android:id="@+id/tvRotate"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Rotate Me"
/>
</LinearLayout>

..and here is my activity:

public class RotateMeActivity extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView tvRotate = (TextView) findViewById(R.id.tvRotate);

        RotateAnimation r = new RotateAnimation(0, 180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        r.setDuration(0);
        r.setFillAfter(true);
        tvRotate.startAnimation(r);
        tvRotate.setVisibility(View.INVISIBLE);
    }
}

My goal is to rotate a view and then be able to hide and show it in code by setting setVisibility. The following works, but setRotation is available only in API Level 11. I need a way to do it in API Level 10.

tvRotate.setRotation(180);//instead of the RotateAnimation, only works in API Level 11
tvRotate.setVisibility(View.INVISIBLE);

For me calling clearAnimation of the View fixed the problem. In my case I wanted to set the View back to its original position after doing a translation with fillAfter set to true.