Android - 開機(boot complete)後自動執行程式(activity/service)

如果希望android裝置一開機時，就能執行某支程式，無論是activity或是service，流程大致如下:

(1) 需要一個BroadcastReceiver

(2) AndroidManifest.xml對這個Receiver定義intent filter去接收android.intent.action.BOOT_COMPLETED

(3) 在AndroidManifest.xml宣告擁有權限android.permission.RECEIVE_BOOT_COMPLETED

(4) 當Recevier收到intent後，去執行activity或是service


一開就就執行某service 的程式範例如下:
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.testboot"
    android:versionCode="1"
    android:versionName="1.0" >

    <application android:icon="@drawable/ic_launcher"
                 android:label="@string/app_name" >
        <receiver android:name=".util.CommonReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>
        <service android:name=".service.UpdaterInitService"/>          
    </application>

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />   
       
</manifest>


Receiver程式如下:
public class CommonReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
       
        if(action.equals(Intent.ACTION_BOOT_COMPLETED)) {
            Intent startIntent = new Intent();
            startIntent.setClass(context, TestService.class);
            context.startService(startIntent);
        }
    }
}

如此一來，開機時系統會broadcast intent "ACTION_BOOT_COMPLETED",我們的Receiver一收到，就會啟動一條TestService