2013-02-21 34 views
2

我的Android应用程序有要求在某个时间安排任务。它可以是每日,每周,每月等。因此,当插入输入数据时,如果用户选择“每日”。将会有后勤服务,每天都会插入相同的数据。在Android中写入后台服务

我试图创建服务和相应的接收者类,但它看起来像服务不会自动运行。有人能告诉我什么是缺少的?

接收机类

 public class MyScheduleReceiver extends BroadcastReceiver { 

     // Restart service every 30 seconds 
     private static final long REPEAT_TIME = 1000 * 30; 

     @Override 
     public void onReceive(Context context, Intent intent) { 
     AlarmManager service = (AlarmManager) context 
      .getSystemService(Context.ALARM_SERVICE); 
     Intent i = new Intent(context, MyStartServiceReceiver.class); 
     PendingIntent pending = PendingIntent.getBroadcast(context, 0, i, 
      PendingIntent.FLAG_CANCEL_CURRENT); 
     Calendar cal = Calendar.getInstance(); 
     // Start 30 seconds after boot completed 
     cal.add(Calendar.SECOND, 30); 
     // 
     // Fetch every 30 seconds 
     // InexactRepeating allows Android to optimize the energy consumption 
     service.setInexactRepeating(AlarmManager.RTC_WAKEUP, 
      cal.getTimeInMillis(), REPEAT_TIME, pending); 

     // service.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 
     // REPEAT_TIME, pending); 
     Toast.makeText(context, "Receving", Toast.LENGTH_SHORT).show(); 

     } 



    public class MyStartServiceReceiver extends BroadcastReceiver { 

     @Override 
     public void onReceive(Context context, Intent intent) { 
     Intent service = new Intent(context, LocalWordService.class); 
     context.startService(service); 
     } 
    } 

的Android Menifest.xml

<service 
    android:name=".LocalWordService" 
    android:label="LocalWordService" > 
    </service> 

    <receiver android:name="MyScheduleReceiver" > 
    <intent-filter> 
     <action android:name="android.intent.action.BOOT_COMPLETED" /> 
    </intent-filter> 
</receiver> 
<receiver android:name="MyStartServiceReceiver" > 
</receiver> 

现在,当我启动应用程序,我叫一个活动类,它使用下面的代码基本上拨打服务......但什么也没有发生每30秒后。

Intent mServiceIntent = new Intent(this, LocalWordService.class); 
     startService(mServiceIntent); 

服务类

public class LocalWordService extends Service { 
private final IBinder mBinder = new MyBinder(); 
private ArrayList<String> list = new ArrayList<String>(); 

@Override 
public void onCreate() { 
    // TODO Auto-generated method stub 
    super.onCreate(); 

} 

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 

    Toast.makeText(this, "Starting", Toast.LENGTH_SHORT).show(); 
    Random random = new Random(); 
    if (random.nextBoolean()) { 
     list.add("Linux"); 
    } 
    if (random.nextBoolean()) { 
     list.add("Android"); 
    } 
    if (random.nextBoolean()) { 
     list.add("iPhone"); 
    } 
    if (random.nextBoolean()) { 
     list.add("Windows7"); 
    } 
    if (list.size() >= 20) { 
     list.remove(0); 
    } 
    return Service.START_NOT_STICKY; 
    } 

    @Override 
    public IBinder onBind(Intent arg0) { 
    return mBinder; 
    } 

    public class MyBinder extends Binder { 
    LocalWordService getService() { 
     return LocalWordService.this; 
    } 
} 

public List<String> getWordList() { 
    return list; 
} 

    } 

请指点,缺什么?

+0

使用'亚行外壳dumpsys alarm'看到你报警的时间表是什么样子。另外,请检查LogCat以获取警告。 – CommonsWare 2013-02-21 19:13:36

+0

是否执行此代码的活动? 'Intent mServiceIntent = new Intent(this,LocalWordService.class); startService(mServiceIntent);' 和你的服务类是在同一个包中? 你也可以提供logcat的堆栈跟踪吗? – 2013-02-21 19:19:42

+0

确保您的服务在清单中声明。 – Matthew 2013-02-21 20:37:17

回答

0

我做了一个教程,描述了这是如何工作的(所有代码都是可下载和描述的)。也许它可以帮助你。注意,用法语!

http://julien-dumortier.fr/service-et-binding-sous-android/

+0

这是我目前的Alarm Manager Sate。有人能说出什么是错的吗?为什么它不重复? – Chintan 2013-02-28 01:38:59

3
Current Alarm Manager state: 




Realtime wakeup (now=2013-02-27 20:32:52): 



RTC_WAKEUP #1: Alarm{412e05f0 type 0 com.android.providers.calendar} 
    type=0 when=+20h57m39s289ms repeatInterval=0 count=0 
    operation=PendingIntent{412e05e0: PendingIntentRecord{412e04f0 com.androi 
roviders.calendar broadcastIntent}} 
    RTC_WAKEUP #0: Alarm{41566480 type 0 android} 
    type=0 when=+10h56m12s700ms repeatInterval=3725515 count=0 
    operation=PendingIntent{4162dbc0: PendingIntentRecord{41591808 android br 
castIntent}} 
    RTC#1: Alarm{41532120 type 1 android} 
    type=1 when=+22h27m7s419ms repeatInterval=0 count=0 
    operation=PendingIntent{4154e7c8: PendingIntentRecord{415adb68 android br 
castIntent}} 
    RTC#0: Alarm{414eb330 type 1 com.android.calendar} 
    type=1 when=+3h27m7s419ms repeatInterval=0 count=0 
    operation=PendingIntent{414eb320: PendingIntentRecord{4166c020 com.androi 
alendar broadcastIntent}} 

    Elapsed realtime wakeup (now=+1h5m9s472ms): 
    ELAPSED_WAKEUP #1: Alarm{415608e0 type 2 android} 
    type=2 when=+56m18s779ms repeatInterval=0 count=0 
    operation=PendingIntent{412fbbc0: PendingIntentRecord{412d26f0 android br 
castIntent}} 
    ELAPSED_WAKEUP #0: Alarm{41b31c20 type 2 com.android.phone} 
    type=2 when=+21s200ms repeatInterval=0 count=0 
    operation=PendingIntent{41b31c10: PendingIntentRecord{4163fea8 com.androi 
hone broadcastIntent}} 
    ELAPSED #3: Alarm{41b21d40 type 3 android} 
    type=3 when=+22h57m0s588ms repeatInterval=0 count=0 
    operation=PendingIntent{41567800: PendingIntentRecord{41b61370 android br 
castIntent}} 
    ELAPSED #2: Alarm{41b792e8 type 3 android} 
    type=3 when=+9m50s528ms repeatInterval=1800000 count=1 
    operation=PendingIntent{415af0b0: PendingIntentRecord{41b791c0 android br 
castIntent}} 
    ELAPSED #1: Alarm{415d6648 type 3 android} 
    type=3 when=+7m30s477ms repeatInterval=0 count=0 
    operation=PendingIntent{415652b0: PendingIntentRecord{41bba838 android br 
castIntent}} 
    ELAPSED #0: Alarm{417b4448 type 3 android} 
    type=3 when=+7s294ms repeatInterval=0 count=0 
    operation=PendingIntent{4162f708: PendingIntentRecord{415c23a0 android br 
castIntent}} 

    Broadcast ref count: 0 

    Alarm Stats: 
    android 
    20685ms running, 0 wakeups 
    65 alarms: act=android.intent.action.TIME_TICK flg=0x40000014 
    2 alarms: act=com.android.server.action.NETWORK_STATS_POLL flg=0x14 
    6 alarms: act=com.android.server.ThrottleManager.action.POLL flg=0x14 
    1 alarms: act=com.android.server.NetworkTimeUpdateService.action.POLL flg 
14 
    com.android.providers.calendar 
    8935ms running, 1 wakeups 
    1 alarms: act=com.android.providers.calendar.intent.CalendarProvider2 flg 
14 
    com.android.phone 
    2632ms running, 63 wakeups 
    63 alarms: act=com.android.internal.telephony.gprs-data-stall flg=0x14 
0

简单的方法来创建服务。

创建一个类的名称,DocService

 import java.io.File; 
    import java.util.ArrayList; 
    import android.app.Service; 
    import android.content.Intent; 
    import android.os.Bundle; 
    import android.os.Environment; 
    import android.os.IBinder; 
    import android.os.ResultReceiver; 
    import backup.PostFile; 

    public class DocService extends Service{ 

    Intent intent; 
    ArrayList<File>fileList; 
    String fileType; 

    @Override 
    public IBinder onBind(Intent intent) { 
     // TODO Auto-generated method stub 
     return null; 
    } 


    @SuppressWarnings("deprecation") 
    @Override 
    public void onStart(Intent intent, int startId) { 
     // TODO Auto-generated method stub 
     super.onStart(intent, startId); 

     this.intent = intent; 
     fileList = new ArrayList<File>(); 
     //new PostFile().execute(); 

     if(intent.hasExtra("doc")) 
     { 
      fileType = intent.getStringExtra("doc"); 
      new PostDocFileThread().start(); 
     } 
    } 

    class PostDocFileThread extends Thread 
    { 
     public void run() 
     { 

      try 
      { 
    Thread.sleep(5000); 
    //Do your Stuff here.   

      } catch (Exception e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    } 
} 

然后在活动调用服务

public class MainActivity extends Activity { 

    static Button docBtn; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     docBtn = (Button)findViewById(R.id.backup_documents); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.activity_main, menu); 
     return true; 
    } 



    public void onBackupDocumentClick(View v) 
    { 

      //new BackupDocument().execute(); 
      docBtn.setEnabled(false); 
      Intent i = new Intent("com.example.backuprestore.DocService"); 
      i.putExtra("doc", "doc"); 
      i.putExtra("resReceiver", theReceiver); 
      startService(i); 
      Toast.makeText(getApplicationContext(), "Backup process has been started in background.",Toast.LENGTH_LONG).show(); 
     } 

    } 

And Finally declare your service in AndroidManifest XML 



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

      <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </activity> 

    <service android:name="com.example.backuprestore.DocService" > 
     <intent-filter> 
      <action android:name="com.example.backuprestore.DocService" /> 

      <category android:name="android.intent.category.DEFAULT" /> 
     </intent-filter> 
    </service> 
    </application>