Android学习笔记 TextSwitcher文本切换组件的使用

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextSwitcher
android:id="@+id/myTextSwitcher"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="显示当前时间" />
</LinearLayout>

public class MainActivity extends Activity {
private Button btn=null;
private TextSwitcher myTextSwitcher=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.btn=(Button)super.findViewById(R.id.btn);
this.myTextSwitcher=(TextSwitcher)super.findViewById(R.id.myTextSwitcher);
this.btn.setOnClickListener(new OnClickListenerImpl());
this.myTextSwitcher.setFactory(new ViewFactoryImpl());
this.myTextSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
this.myTextSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
}

private class OnClickListenerImpl implements OnClickListener{

@Override
public void onClick(View v) {
MainActivity.this.myTextSwitcher.setText("当前时间为："+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").format(new Date()));
}
}

private class ViewFactoryImpl implements ViewFactory{

@Override
public View makeView() {
TextView myTextView=new TextView(MainActivity.this);
myTextView.setBackgroundColor(0xFFFFFFFF);
myTextView.setTextColor(0xFF000000);
myTextView.setLayoutParams(new TextSwitcher.LayoutParams(
LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT
));
return myTextView;
}

}