Chi Learning

首先是從BroadcastReceiver派生出一個新類，用來監聽系統啟動後發出的廣播消息android.intent.action.BOOT_COMPLETED 。 

• BootReceiver.java:
• import android.content.BroadcastReceiver;
• import android.content.Context;
• import android.content.Intent;
• import android.util.Log;
• publicclass BootReceiver extends BroadcastReceiver {
• publicvoid 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;
• publicclass FirstRun extends Activity {
• publicvoid 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>

 文章出處  http://www.ziyouku.com/archives/android-start-at-boot-activity-service.html