Widget 跑马灯

在Activity中让TextView具有跑马灯效果很简单。只需要加android:ellipsize="marquee",并且在java代码中requestFocus就好了。但是,要是在Widget中的TextView怎么办呢?(答案是:在Layout中加<requestFocus />)

Widget 中TextView的跑马灯效果

应为Widget程序中没有提供类似requestFocus这样的函数,因此只能在layout中加<requestFocus />,让Framework主动设置TextView为Focus.

 <TextView
android:id="@+id/textView"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:ellipsize
="marquee"
android:focusable
="true"
android:focusableInTouchMode
="true"
android:marqueeRepeatLimit
="marquee_forever"
android:scrollHorizontally
="true"
android:singleLine
="true"
android:textColor
="#ffffff"
android:textSize
="14sp"
android:typeface
="monospace" >

<requestFocus />
</TextView>

 

另外,看了一篇文章可以让TextView在没有焦点的情况下也具有跑马灯效果。

android不获取焦点也可以实现跑马灯效果

参考自:http://liuyun025.iteye.com/blog/1395351,自定义TextView:

public class MarqueeTextView extends TextView{
private boolean mMarquee = false;
public MarqueeTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setMarquee(boolean marquee) {
mMarquee = marquee;
}
@Override
public void onFocusChanged(boolean focused, int direction,Rect previouslyFocusedRect) {
if (focused){
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
}
@Override
public void onWindowFocusChanged(boolean focused) {
if (focused){
super.onWindowFocusChanged(focused);
}
}
@Override
public boolean isFocused() {
return mMarquee;
}
}




 

 

 

 

posted on 2012-04-05 13:25  program_lover  阅读(404)  评论(0编辑  收藏  举报

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