本文实例讲述了Android开发基础之创建启动界面Splash Screen的方法。分享给大家供大家参考。具体如下:
启动界面Splash Screen在应用程序是很常用的,往往在启动界面中显示产品Logo、公司Logo或者开发者信息,如果应用程序启动时间比较长,那么启动界面就是一个很好的东西,可以让用户耐心等待这段枯燥的时间。
Android 应用程序创建一个启动界面Splash Screen非常简单。比如创建一个工程MySample,主Acitity就叫MySample,创建另一个Activity叫 SplashScreen,用于显示启动界面,资源文件为splash.xml。至于如何制作SplashSceen界面,这不是本文章要讨论的东西,就 此略过。
SplashScreen的代码如下:
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package com.ctoof.android;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;
public class SplashScreen extends Activity {
protected boolean _active = true ;
protected int _splashTime = 5000 ;
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.splash);
Thread splashTread = new Thread() {
@Override
public void run() {
try {
int waited = 0 ;
while (_active && (waited < _splashTime)) {
sleep( 100 );
if (_active) {
waited += 100 ;
}
}
} catch (InterruptedException e) {
// do nothing
} finally {
finish();
// 启动主应用
startActivity( new Intent( "com.ctoof.android.MySample.MyApp" ));
stop();
}
}
};
splashTread.start();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
_active = false ;
}
return true ;
}
}
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然后在AndroidMainfest.xml中修改代码如下:
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<? xml version = "1.0" encoding = "utf-8" ?>
< manifest xmlns:android = "http://schemas.android.com/apk/res/android"
package = "com.ctoof.android"
android:versionCode = "1"
android:versionName = "1.0" >
< application android:icon = "@drawable/icon" android:label = "@string/app_name" >
< activity android:name = ".SplashScreen"
android:label = "@string/app_name" >
< intent-filter >
< action android:name = "android.intent.action.MAIN" />
< category android:name = "android.intent.category.LAUNCHER" />
</ intent-filter >
</ activity >
< activity android:name = ".MyApp" >
< intent-filter >
< action android:name = " com.ctoof.android. MySample.MyApp " />
< category android:name = "android.intent.category.DEFAULT" />
</ intent-filter >
</ activity >
</ application >
< uses-sdk android:minSdkVersion = "4" />
</ manifest >
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在这里负责注册两个活动。把负责管理启动界面Splash Screen的活动Activity作为应用程序的主活动,然后在SplashScreen中负责启动MyApp。
希望本文所述对大家的Android程序设计有所帮助。