我已阅读文档http://www.javacodegeeks.com/2012/08/android-broadcast-receiver-enable-and.html，我认为即使我退出应用程序，广播接收器 AlarmManagerBroadcastReceiver 也会继续运行，为了停止广播接收器，我必须再次运行应用程序并单击禁用广播接收器按钮，对吗？
<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>
<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>
package com.code4reference.enabledisablebroadcastreceiver;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.widget.Toast;
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();
}
}
package com.code4reference.enabledisablebroadcastreceiver;
import com.example.enabledisablebroadcastreceiver.R;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class EnableDisableBroadcastReceiver extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/**
* This method gets called when 'Start Repeating Alarm' button is pressed.
* It sets the repeating alarm whose periodicity is 3 seconds.
* @param view
*/
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();
}
/**
* This method gets called when 'cancel Alarm' button is pressed.
* This method cancels the previously set repeating alarm.
* @param view
*/
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();
}
/**
* This method enables the Broadcast receiver registered in the AndroidManifest file.
* @param view
*/
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();
}
/**
* This method disables the Broadcast receiver registered in the AndroidManifest file.
* @param view
*/
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();
}
}