android 文本切换 TextSwicher

要进行切换操作，那么肯定需要ViewFactory,因为如果不设置，那么就无法完成组件的转换，而文本组件转换肯定需要操作TextView。

在main.xml中

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<TextSwitcher

android:id="@+id/myTextSwitcher"

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="显示当前时间"/>

</LinearLayout>

在MyTextSwitcherDemo.java程序中

package com.tarena.textswitcher;

import java.text.SimpleDateFormat;

import java.util.Date;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup.LayoutParams;

import android.view.animation.AnimationUtils;

import android.widget.Button;

import android.widget.TextSwitcher;

import android.widget.TextView;

import android.widget.ViewSwitcher.ViewFactory;

public class MyTextSwitcherDemo extends Activity {

private TextSwitcher myTextSwitcher = null;

private Button but = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

super.setContentView(R.layout.main);

this.myTextSwitcher = (TextSwitcher) super

.findViewById(R.id.myTextSwitcher);

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

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));

this.but.setOnClickListener(new OnClickListenerImpl());

}

private class OnClickListenerImpl implements OnClickListener {

public void onClick(View v) {

MyTextSwitcherDemo.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 {

public View makeView() {

TextView txt = new TextView(MyTextSwitcherDemo.this);

txt.setBackgroundColor(0xFFFFFFFF);

txt.setTextColor(0xFF000000);

txt.setLayoutParams(new TextSwitcher.LayoutParams(

LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

txt.setTextSize(30);

return txt;

}

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