android – 如何在另一个活动中停止取消警报管理器？

概述我在活动A& amp;停止/取消另一个活动B.我努力但没有运气,下面是我的代码： MainAcitivity public class MainActivity extends Activity { private PendingIntent pendingIntent; private static Context context; @Override pu 我在活动A& amp;停止/取消另一个活动B.我努力但没有运气,下面是我的代码：

MainAcitivity

public class MainActivity extends Activity {    private PendingIntent pendingIntent;    private static Context context;    @OverrIDe    public voID onCreate(Bundle savedInstanceState)     {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_main);    Intent myIntent = new Intent(this,MyReceiver.class);    pendingIntent = PendingIntent.getbroadcast(MainActivity.this,myIntent,0);    AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),12 * 60 * 60,pendingIntent);     } //end onCreate}

MyReceiver

public class MyReceiver extends broadcastReceiver    {        @OverrIDe         public voID onReceive(Context context,Intent intent)        {           Intent service1 = new Intent(context,MyAlarmService.class);           context.startService(service1);         }    }

MyAlarmService

public class MyAlarmService extends Service {     private notificationmanager mManager;     @OverrIDe     public IBinder onBind(Intent arg0)     {       // Todo auto-generated method stub        return null;     }    @OverrIDe    public voID onCreate()     {       // Todo auto-generated method stub         super.onCreate();    }   @SuppressWarnings("static-access")   @OverrIDe   public voID onStart(Intent intent,int startID)   {       super.onStart(intent,startID);       mManager = (notificationmanager) this.getApplicationContext().getSystemService(this.getApplicationContext().NOTIFICATION_SERVICE);       Intent intent1 = new Intent(this.getApplicationContext(),MainActivity.class);       Notification notification = new Notification(R.drawable.ic_launcher,"This is a test message!",System.currentTimeMillis());       intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_top| Intent.FLAG_ACTIVITY_CLEAR_top);       PendingIntent pendingNotificationIntent = PendingIntent.getActivity( this.getApplicationContext(),intent1,PendingIntent.FLAG_UPDATE_CURRENT);       notification.flags |= Notification.FLAG_auto_CANCEL;       notification.setLatestEventInfo(this.getApplicationContext(),"AlarmManagerDemo",pendingNotificationIntent);       mManager.notify(0,notification);    }    @OverrIDe    public voID onDestroy()     {        // Todo auto-generated method stub        super.onDestroy();    }}

NextActivity

public class NextActivity extends Activity{    @OverrIDe    public voID onCreate(Bundle savedInstanceState)     {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);           Intent intentt = new Intent(this,MyReceiver.class);           PendingIntent pintent = PendingIntent.getbroadcast(this,10,intentt,0);           AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);           stopService(intentt);           alarm.cancel(pintent);    }   }

表现

<?xml version="1.0" enCoding="utf-8"?><manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"    package="com.example"    androID:versionCode="1"    androID:versionname="1.0" >    <uses-sdk        androID:minSdkVersion="8"        androID:targetSdkVersion="10" />    <uses-permission androID:name="androID.permission.WAKE_LOCK" />    <application        androID:allowBackup="true"        androID:icon="@drawable/ic_launcher"        androID:label="@string/app_name"        androID:theme="@style/Apptheme" >        <activity            androID:name="com.example.MainActivity"            androID:label="@string/app_name" >            <intent-filter>                <action androID:name="androID.intent.action.MAIN" />                <category androID:name="androID.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity            androID:name="com.example.NextActivity"            androID:label="Next Screen">        </activity>        <service androID:name=".MyAlarmService"                 androID:enabled="true" />        <receiver androID:name=".MyReceiver"/>    </application></manifest>

它仍在发出警报,执行此 *** 作后无法停止/取消.

解决方法 创建警报时,使用此PendingIntent：

Intent myIntent = new Intent(MainActivity.getAppContext(),MyReceiver.class);pendingIntent = PendingIntent.getbroadcast(MainActivity.this,0);

当您尝试取消它时,您正在使用此PendingIntent：

Intent intentt = new Intent(MainActivity.getAppContext(),NextActivity.class);PendingIntent pintent = PendingIntent.getService(this,0);

要取消警报时,需要使用相同的代码创建PendingIntent.使用getbroadcast()而不是getService()并使用MyReceiver.class而不是NextActivity.class.

此外,您无需在MainActivity中保存应用程序上下文.你可以删除所有这些静态的东西.在执行新的Intent(Context,Thing.class)时,您可以将它用作Context参数

总结

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