android activity/service开机后自动运行

看了网上的几个例子，也做了一个系统启动后直接运行 activity的小程序

代码贴在下面：

首先是从 BroadcastReceiver 派生出一个新类，用来监听系统启动后发出的广播消息 android.intent.action.BOOT_COMPLETED 。

BootReceiver.java:

import android. content. BroadcastReceiver; import android. content. Context ; import android. content. Intent; import android. util . Log ; public class BootReceiver extends BroadcastReceiver {     public void onReceive( Context context , Intent intent) {                   if ( intent. getAction ( ) . equals ( "android.intent.action.BOOT_COMPLETED" ) )          {               Log . d( "BootReceiver" , "system boot completed" ) ;               Intent newIntent = new Intent( context , FirstRun. class ) ;          newIntent. setAction ( "android.intent.action.MAIN" ) ; //MyActivity action defined in AndroidManifest.xml          newIntent. addCategory( "android.intent.category.LAUNCHER" ) ; //MyActivity category defined in AndroidManifest.xml          newIntent. setFlags( Intent. FLAG_ACTIVITY_NEW_TASK) ; //If activity is not launched in Activity environment, this flag is mandatory to set          context . startActivity( newIntent) ;          //if you want to start a service, follow below method:          /*******************************************************             Intent service = new Intent(yourService.ACTION_START);             service.setClass(context, yourService.class);             context.startService(service);          ******************************************************/          }      } }

接下来这个类就是监听到系统启动完毕后，我们要运行的activity.
FirstRun.java

import android. app. Activity ; import android. os. Bundle; public class FirstRun extends Activity {          public void onCreate( Bundle savedInstanceState) {         super . onCreate( savedInstanceState) ;         setContentView( R. layout . main) ;     } }

当然，我们还要改配置文件，需要注意的是,在manifest.xml中需要加上
< uses-permission android:name= "android.permission.RECEIVE_BOOT_COMPLETED" > < / uses-permission>

Manifest.xml

< ? xml version = "1.0" encoding = "utf-8" ? >
< manifest xmlns:android= "http://schemas.android.com/apk/res/android"
      package= "com.service.prac"
      android:versionCode= "1"
      android:versionName= "1.0" >
      
    < application android:icon= "@drawable/icon" android:label= "@string/app_name" >
        < receiver android:name= ".BootReceiver"
                  android:label= "@string/app_name" >
            < intent-filter>
                < action android:name= "android.intent.action.BOOT_COMPLETED" / >
                < category android:name= "android.intent.category.LAUNCHER" / >
            < / intent-filter>
        < / receiver>
        < activity android:name= ".FirstRun" >
            < intent-filter>
                < action android:name= "android.intent.action.MAIN" / >
                < category android:name= "android.intent.category.LAUNCHER" / >
            < / intent-filter>
        < / activity>
    < / application>
    < uses-sdk android:minSdkVersion= "3" / >
    < uses-permission android:name= "android.permission.RECEIVE_BOOT_COMPLETED" > < / uses-permission>
< / manifest>