文本切换器的功能和用法

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MainActivity.java

package com.lxm.textswitchertest;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.view.Menu;import android.view.View;import android.widget.TextSwitcher;import android.widget.TextView;import android.widget.ViewSwitcher.ViewFactory;public class MainActivity extends Activity {private TextSwitcher textSwitcher;String[] strs = new String[]{"瘋狂Java講義","輕量級JavaEE企業應用實戰","瘋狂Android講義","瘋狂Ajax講義"};int curStr;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher);textSwitcher.setFactory(new ViewFactory() {@Overridepublic View makeView() {TextView tv = new TextView(MainActivity.this);tv.setTextSize(40);tv.setTextColor(Color.MAGENTA);return tv;}});next(null);}public void next(View v){textSwitcher.setText(strs[curStr++ % strs.length]);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}

activity_main.xml

<RelativeLayout 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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <TextSwitcher        android:id="@+id/textSwitcher"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="next"/></RelativeLayout>

运行效果：

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