2

我正在尝试创建一个在状态栏中弹出提醒的提醒应用程序。据我了解，Android NotificationManager 是用于安排通知的标准工具，但是需要一个 BootService 来重新安排通知，因为安排的事件不会在引导后继续存在。

我拼凑了一个应用程序，它在启动时安排一个提醒，并在状态栏中弹出一个通知。如果您单击通知，它会启动 MainActivity，它在未来将具有添加更多提醒、删除提醒或其他任何选项的选项。

我遇到的问题是提醒第一次正常工作但是它似乎正在重新安排自己并由于某种原因随机再次弹出。我应该启动另一项活动而不是安装 BootAlarmService 的活动吗？

更新： 所以我想我在 logcat 中找到了一些线索。显然，服务正在崩溃并被重新启动，这正在重置通知。任何想法为什么会这样？

更新二：代码更改为工作模型

ActivityManager   I  No longer want com.example.alarm_boot_test (pid 1428): hidden #16
ActivityManager   W  Scheduling restart of crashed service com.example.alarm_boot_test/.BootAlarmService in 5000ms
ActivityManager   W  Scheduling restart of crashed service com.example.alarm_boot_test/.NotificationAlarmService in 15000ms
ActivityManager   I  Start proc com.example.alarm_boot_test for service com.example.alarm_boot_test/.BootAlarmService: pid=2321 uid=10069 gids={}
       dalvikvm   D  Debugger has detached; object registry had 1 entries
        szipinf   D  Initializing inflate state
BootAlarmService  D  oncreate()
BootAlarmService  D  alarm set for Thu Jan 17 08:03:00 CST 2013

MainActivity.java

package com.example.alarm_boot_test;

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);
    }


}

BootAlarmService.java

package com.example.alarm_boot_test;

import java.util.Calendar;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class BootAlarmService extends Service
{
    private final String TAG = this.getClass ().getName ();

    @Override
    public void onCreate ()
    {
        Log.d (TAG, "oncreate()");
        super.onCreate ();
    }


   @Override
   public int onStartCommand (Intent intent, int flags, int startId)
   {
       Log.d (TAG, "alarm_test: BootAlarmService.onStartCommand() Received start id " + startId + ": " + intent);

       // if intent == null, service has been killed/restarted by system
       if (intent != null)
        createNotificationOnBoot();
       else
        Toast.makeText (getBaseContext (), "Intent was null in BootAlarmService.", Toast.LENGTH_LONG).show();


       return START_STICKY;
    }


    private void createNotificationOnBoot ()
    {
        Intent inotify = new Intent(this , NotificationAlarmService.class);
        inotify.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
        AlarmManager amgr = (AlarmManager)getSystemService(ALARM_SERVICE);
        PendingIntent pendingIntent = PendingIntent.getService(this, 0, inotify, 0);

        // go off two mins from now
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MINUTE, calendar.get (Calendar.MINUTE) + 2);

        amgr.set (AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis (), pendingIntent);


        Log.d (TAG, "alarm set for " + calendar.getTime ().toString ());
    }


    @Override
    public IBinder onBind (Intent intent)
    {
        return null;
    }


}

BootReceiver.java

package com.example.alarm_boot_test;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BootReceiver extends BroadcastReceiver
{

    @Override
    public void onReceive (final Context context, final Intent bootintent)
    {
        Intent i = new Intent ();
        i.setAction ("com.example.alarm_boot_test.BootAlarmService");
        context.startService (i);
    }

}

NotificationAlarmService.java

package com.example.alarm_boot_test;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class NotificationAlarmService extends Service
{
    private final String TAG = this.getClass().getName ();


    @Override
    public void onCreate ()
    {
        super.onCreate ();
    }


    @Override
    public int onStartCommand (Intent intent, int flags, int startId)
    {
       Log.d (TAG, "alarm_test: NotificationAlarmService.onStartCommand()");
       if (intent != null)
          createNotification ();
       else
          Toast.makeText (getBaseContext (), "Intent was null in NotificationAlarmService.", Toast.LENGTH_LONG).show();

       return super.onStartCommand (intent, flags, startId);
     }



    private void createNotification()
    {
      NotificationManager notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
      Notification notification = new Notification(android.R.drawable.stat_sys_warning, "Note from AlarmService", System.currentTimeMillis());
      Intent i = new Intent(this, ViewReminder.class);
      PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, i, 0);

      notification.setLatestEventInfo(this, "New Notification", "You have been notified by AlarmService", pendingIntent);
      notificationManager.notify(10001, notification);

   }




    @Override
   public IBinder onBind (Intent intent)
   {
       return null;
   }
}

*activity_main.xml*

<RelativeLayout 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"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Service started! Reboot!" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarm_boot_test"
    android:versionCode="1"
    android:versionName="1.0" >

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

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="9" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <service android:name="com.example.alarm_boot_test.BootAlarmService" >
            <intent-filter>
                <action android:name="com.example.alarm_boot_test.BootAlarmService" >
                </action>
            </intent-filter>
        </service>

        <receiver android:name="com.example.alarm_boot_test.BootReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" >
                </action>
            </intent-filter>
        </receiver>

        <service android:name="com.example.alarm_boot_test.NotificationAlarmService" >
        </service>

        <activity
            android:name="com.example.alarm_boot_test.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>
    </application>

</manifest>
4

1 回答 1

1

如果它对其他人有帮助，我想我需要在 BootAlarmService.java 和 NotificationAlarmService.java 的 onStartCommand() 方法中检查传递的 Intent 是否为 NULL。仅对其进行了几天的测试，但如果系统终止/重新启动服务，则 Intent 似乎为 NULL。对此的简单测试允许我仅在启动时启动服务时创建通知（当传递的 Intent 不为空时）。

于 2013-01-23T15:59:15.610 回答