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 ; } } |
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 > |
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。