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我认为BroadcastReceiver AlarmManagerBroadcastReceiver即使我退出应用程序也会继续运行。我认为BroadcastReceiver当我重新启动系统时，它将自动恢复并继续运行。为了停止广播接收器，我必须卸载应用程序，对吗？

布局

<LinearLayout xmlns:android='http://schemas.android.com/apk/res/android'
    xmlns:tools='http://schemas.android.com/tools'
    android:layout_width='match_parent'
    android:layout_height='match_parent' 
    android:orientation='vertical'>

    <Button
        android:layout_width='fill_parent'
        android:layout_height='wrap_content'
        android:padding='@dimen/padding_medium'
        android:text='@string/start_repeating_alarm'
        android:onClick='startRepeatingAlarm'
        tools:context='.EnableDisableBroadcastReceiver' />

    <Button
       android:layout_width='fill_parent'
       android:layout_height='wrap_content'
       android:padding='@dimen/padding_medium'
       android:text='@string/cancel_alarm'
       android:onClick='cancelAlarm'
       tools:context='.EnableDisableBroadcastReceiver' />

    <Button
        android:layout_width='fill_parent'
        android:layout_height='wrap_content'
        android:padding='@dimen/padding_medium'
        android:text='@string/enable_broadcast_receiver'
        android:onClick='enableBroadcastReceiver'
        tools:context='.EnableDisableBroadcastReceiver' />

   <Button
       android:layout_width='fill_parent'
       android:layout_height='wrap_content'
       android:padding='@dimen/padding_medium'
       android:text='@string/disable_broadcast_receiver'
       android:onClick='disableBroadcastReceiver'
       tools:context='.EnableDisableBroadcastReceiver' />

</LinearLayout>

资源

<resources>
    <string name='app_name'>EnableDisableBroadcastReceiver</string>
    <string name='enable_broadcast_receiver'>Enable Broadcast Receiver</string>
    <string name='disable_broadcast_receiver'>Disable Broadcast Receiver</string>
    <string name='start_repeating_alarm'>Start Repeating Alarm</string>
    <string name='cancel_alarm'>Cancel Alarm</string>
    <string name='menu_settings'>Settings</string>
    <string name='title_activity_enable_disable_boradcast_receiver'>EnableDisableBoradcastReceiver</string>
</resources>

广播接收器 

public class AlarmManagerBroadcastReceiver extends BroadcastReceiver {

    final public static String ONE_TIME = 'onetime';

    @Override
    public void onReceive(Context context, Intent intent) {

         //You can do the processing here update the widget/remote views.
         StringBuilder msgStr = new StringBuilder();
         //Format time.
         Format formatter = new SimpleDateFormat('hh:mm:ss a');
         msgStr.append(formatter.format(new Date()));

         Toast.makeText(context, msgStr, Toast.LENGTH_SHORT).show();

    }
}

活动

public class EnableDisableBroadcastReceiver extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void startRepeatingAlarm(View view)
    {
        AlarmManager am=(AlarmManager)this.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, AlarmManagerBroadcastReceiver.class);
        PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, 0);
        //After after 2 seconds
        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 4 , pi); 
        Toast.makeText(this, 'Started Repeating Alarm', Toast.LENGTH_SHORT).show();
    }

    public void cancelAlarm(View view)
    {
        Intent intent = new Intent(this, AlarmManagerBroadcastReceiver.class);
        PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
        AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
        alarmManager.cancel(sender);
        Toast.makeText(this, 'Cancelled alarm', Toast.LENGTH_SHORT).show();
    }

    public void enableBroadcastReceiver(View view){
        ComponentName receiver = new ComponentName(this, AlarmManagerBroadcastReceiver.class);
        PackageManager pm = this.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
        Toast.makeText(this, 'Enabled broadcast receiver', Toast.LENGTH_SHORT).show();
    }

    public void disableBroadcastReceiver(View view){
        ComponentName receiver = new ComponentName(this, AlarmManagerBroadcastReceiver.class);
        PackageManager pm = this.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                PackageManager.DONT_KILL_APP);
        Toast.makeText(this, 'Disabled broadcst receiver', Toast.LENGTH_SHORT).show();
    }   
}
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1 回答 1

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阅读Broadcastreceiver 和 Paused activity。它提到当您在活动中以编程方式注册广播接收器时，当活动暂停时它将不会收到广播。

如果您想在后台运行它，您可能会想要使用服务。

Service 是一个应用程序组件，可以在后台执行长时间运行的操作，并且不提供用户界面。

让服务运行并在那里注册 BroadcastReceiver。您可以在清单中注册它。如果您也想在重新启动时运行它，那么您需要使用：

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

并将其放入intent-filter您的接收器中：

<receiver android:enabled="true"           
android:permission="android.permission.RECEIVE_BOOT_COMPLETED" android:name=".MyReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

如果可能的话，您可以在清单中注册广播接收器并在那里处理它。接收器在主线程上运行，因此理想情况下，您可以向正在运行的服务发出信号或在那里启动服务。您可能想阅读是否应该使用 Service 或 BroadcastReceiver 构建警报？.

希望能帮助到你。

于 2013-11-07T03:19:52.360 回答