android 同一个界面多个跑马灯兑现

要实现跑马灯效果。指定的TextView必须获得焦点。而一个界面只有一个view占据焦点。所以必须重写要实现的Textview。如下：

import android.content.Context;import android.graphics.Rect;import android.util.AttributeSet;import android.widget.TextView;public class ForcedTextView extends TextView {		public ForcedTextView(Context context, AttributeSet attrs)      {          super(context, attrs);      }        	  @Override      protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect)      {          if(focused)        {        	super.onFocusChanged(focused, direction, previouslyFocusedRect);          }    }            public void onWindowFocusChanged(boolean hasWindowFocus)      {          if(hasWindowFocus)         	{        	super.onWindowFocusChanged(hasWindowFocus);          	}    }            public boolean isFocused()      {          return true;      }  }

?让Textview一直把持住焦点。就可以实现要的效果啦！！！