Android开发之文本切换组件TextSwi…

.xml

<LinearLayout 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"

    tools:context=".MainActivity" 

    android:orientation="vertical">

    <TextSwitcher 

        android:id="@+id/textSwitch"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

    

    <Button 

        android:id="@+id/but"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="显示时间"/>

</LinearLayout>

.java

package com.example.textswitcherdemo;

import java.text.SimpleDateFormat;

import java.util.Date;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.animation.AnimationUtils;

import android.widget.Button;

import android.widget.LinearLayout.LayoutParams;

import android.widget.TextSwitcher;

import android.widget.TextView;

import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity {

private TextSwitcher myTextSwitcher=null;

private Button button=null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

this.myTextSwitcher=(TextSwitcher) super.findViewById(R.id.textSwitch);

this.button=(Button) super.findViewById(R.id.but);

this.button.setOnClickListener(new OnClickListenerImp());

this.myTextSwitcher.setFactory(new ViewFactoryImp());

this.myTextSwitcher.setInAnimation(AnimationUtils.loadAnimation(

this, 

android.R.anim.fade_in

));

this.myTextSwitcher.setOutAnimation(AnimationUtils.loadAnimation(

this,

android.R.anim.fade_out

));

}

private class OnClickListenerImp implements OnClickListener{

public void onClick(View v) {

MainActivity.this.myTextSwitcher.setText(

"当前时间为:"+new SimpleDateFormat("yyyy-MM-dd HH:ss:SS").format(new Date())

);

}

}

private class ViewFactoryImp implements ViewFactory{

public View makeView() {

TextView txt=new TextView(MainActivity.this);

txt.setBackgroundColor(0xFFFFFF);

txt.setTextColor(0XFF000000);

txt.setLayoutParams(new TextSwitcher.LayoutParams(

LayoutParams.FILL_PARENT,

LayoutParams.FILL_PARENT

));

txt.setTextSize(30);

return txt;

}

}

}