android - 为什么 bringToFront 只工作一次

Question

bringToFront 工作一次，之后就不再工作了。为什么？当您单击一次时，它会将该 View 带到前面，但是当您尝试恢复该 View 时，它不再有效。触摸/点击始终正常。

    View view1,view2,view3,view4; 
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //sets the Bundle  

    //code to initiate and putting the views in layout 
    view1= findViewById(R.id.button1);
    view2= findViewById(R.id.button2);

    view1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Log.i("onClick","1");
            view1.bringToFront();
            view1.invalidate(); 
            view2.invalidate(); 
        }
    });     
    view2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Log.i("onClick","2");
            view2.bringToFront(); 
            view1.invalidate(); 
            view2.invalidate(); 
        }
    });
}       

这是xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >


    <TextView
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginLeft="30dp"
        android:text="Button2ButtonButton"
        android:textColor="#00ff00"
        android:textSize="60dp" />

    <TextView
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginLeft="170dp"
        android:text="Button1ButtonButton"
        android:textColor="#ff0000"
        android:textSize="60dp" />

</RelativeLayout>

Answer 1

我想我解决了。我必须将所有内容都放在一个图层中并使其无效。