我希望创建一个只包含服务(没有活动)的应用程序。这个服务必须在启动时启动。我的问题是,如果没有活动,似乎启动接收器不会被调用。我使用以下示例进行测试。我有不同的文件:
MyReceiver.java:
package com.test.teststartserviceatboot;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive( Context ctx, Intent i ) {
Log.v( "MyReceiver", "onReceive : ");
Intent intent = new Intent( ctx, MonService.class );
ctx.startService(intent);
}
}
MyService.java:
package com.test.teststartserviceatboot;
import android.app.Service;
public class MyService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.v( "MyService","onStartCommand" );
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind( Intent arg0 ) {
Log.v( "MyService","onBind" );
return null;
}
}
MainActivity.java:
package com.test.teststartserviceatboot;
import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
我只在我的几个测试中修改了AndroidManifest。
Test 1 (with Activity)
<uses-sdk android:minSdkVersion="17" android:targetSdkVersion="17"/> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".MyService" android:exported="false" android:label="MyService" > </service> <receiver android:name=".MyReceiver" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> </intent-filter> </receiver> </application>
-> 重启后,该服务正在运行。我看到日志:
AtivityManager 为 com.test.teststartserviceatboot 启动进程以进行广播 com.test.teststartserviceatboot/.MyReceiver: pid=1808 uid=10156 gids={50156}
MyReceiver onReceive
MyService onStartCommand
Test 2 (without Activity)
<uses-sdk android:minSdkVersion="17" android:targetSdkVersion="17"/> <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <service android:name=".MyService" android:exported="false" android:label="MyService" > </service> <receiver android:name=".MyReceiver" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> </intent-filter> </receiver> </application>
->The service don't running
- Test 3
我在测试1上使用同一个应用程序(带有活动)。这次在重新启动平板电脑之前杀死了应用程序(参数->应用程序->TestServiceAtBoot->强制停止)。 -> 重启后,服务不运行
广播接收器是否需要活动才能工作?为什么?
谢谢您的解答。