addPeriodicSync funktioniert nicht

Question

Haben Sie ein Problem mit der Verwendung von SyncAdapter. Ich habe es wie in this Guide erstellt, aber wenn ich versuche, addPeriodicSync zu verwenden, bekomme ich keinen Effekt.

Ich lese alle Antworten, die ich auf Stack Overflow gefunden habe, habe aber immer noch keine Ahnung, wo das Problem liegt. Bitte fragen Sie nach Hilfe.

Code:

Manifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.igordotsenko.dotsenkorssreader" > 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS" /> 
    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" /> 
    <uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" /> 
    <uses-permission android:name="android.permission.READ_SYNC_STATS" /> 

    <application 
     android:name="com.activeandroid.app.Application" 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_rss" 
     android:label="@string/app_name" 
     android:supportsRtl="true" 
     android:theme="@style/AppTheme" > 
     <activity android:name=".MainActivity" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity android:name=".ItemListActivity" > 
     </activity> 
     <activity android:name=".ItemContentActivity" > 
     </activity> 

     <service android:name=".RefreshService" /> 

     <provider 
      android:name=".ReaderContentProvider" 
      android:authorities="com.igordotsenko.dotsenkorssreader" 
      android:enabled="true" 
      android:exported="true" > 
     </provider> 

     <service 
      android:name=".syncadapter.SyncService" 
      android:exported="true" 
      > 
      <!-- android:process=":sync" --> 
      <intent-filter> 
       <action android:name="android.content.SyncAdapter" /> 
      </intent-filter> 
      <meta-data 
       android:name="android.content.SyncAdapter" 
       android:resource="@xml/syncadapter" /> 
     </service> 

     <service 
      android:name=".syncadapter.AuthenticatorService" 
      android:exported="true" 
      > 
      <intent-filter> 
       <action android:name="android.accounts.AccountAuthenticator"/> 
      </intent-filter> 
      <meta-data 
       android:name="android.accounts.AccountAuthenticator" 
       android:resource="@xml/authenticator" /> 

     </service> 
    </application> 

</manifest> 

SyncAdapter Implementierung

package com.igordotsenko.dotsenkorssreader.syncadapter; 

import android.accounts.Account; 
import android.content.AbstractThreadedSyncAdapter; 
import android.content.ContentProviderClient; 
import android.content.ContentResolver; 
import android.content.Context; 
import android.content.SyncResult; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.RemoteException; 
import android.util.Log; 

import com.igordotsenko.dotsenkorssreader.ReaderContentProvider; 

public class ReaderSyncAdapter extends AbstractThreadedSyncAdapter { 
    public static final String SA_LOG = "syncAdapter_log"; 

    private static final String AUTHORITY = "com.igordotsenko.dotsenkorssreader"; 
    private static final Uri CHANNEL_CONTENT_URI = Uri.parse(
      "content://" + AUTHORITY + "/" + ReaderContentProvider.ReaderRawData.CHANNEL_TABLE); 

    private static final Uri ITEM_CONTENT_URI = Uri.parse(
      "content://" + AUTHORITY + "/" + ReaderContentProvider.ReaderRawData.ITEM_TABLE); 

    private ContentResolver contentResolver; 


    public ReaderSyncAdapter(Context context, boolean autoInitialize) { 
     super(context, autoInitialize); 

     this.contentResolver = context.getContentResolver(); 
     Log.i(SA_LOG, "ReaderSyncAdapter created"); 
    } 


    @Override 
    public void onPerformSync(Account account, Bundle extras, String authority, ContentProviderClient provider, SyncResult syncResult) { 
     Log.i(SA_LOG, "onPerformSync started"); 
     // trying to crash my programm to understand, that onPerforSync was started. Brutal,isn't it? 
     String str = "a"; 

     if (true) str = null; 

     str.equals("a"); 
    } 
} 

SyncService

package com.igordotsenko.dotsenkorssreader.syncadapter; 

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

import java.util.Objects; 

public class SyncService extends Service { 
    private static final Object syncAdapterLock = new Object(); 
    private static ReaderSyncAdapter syncAdapter; 

    public SyncService() { 
     synchronized (syncAdapterLock) { 
      Log.i(ReaderSyncAdapter.SA_LOG, "SyncService started"); 
      if (syncAdapter == null) 
       syncAdapter = new ReaderSyncAdapter(getApplicationContext(), true); 
      Log.i(ReaderSyncAdapter.SA_LOG, "SyncService finished"); 
     } 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     Log.i(ReaderSyncAdapter.SA_LOG, "SyncService onBind"); 
     return syncAdapter.getSyncAdapterBinder(); 
    } 
} 

syncadapter.xml

<?xml version="1.0" encoding="utf-8"?> 
<sync-adapter xmlns:android="http://schemas.android.com/apk/res/android" 
    android:contentAuthority="com.igordotsenko.dotsenkorssreader" 
    android:accountType="dummy.com" 
    android:userVisible="false" 
    android:supportsUploading="false" 
    android:allowParallelSyncs="false" 
    android:isAlwaysSyncable="true" 
    /> 

AuthenticatorService

package com.igordotsenko.dotsenkorssreader.syncadapter; 

import android.app.Service; 
import android.content.Intent; 
import android.os.IBinder; 

public class AuthenticatorService extends Service { 
    private ReaderAccountAuthenticator readerAccountAuthenticator; 

    public AuthenticatorService() { 
     readerAccountAuthenticator = new ReaderAccountAuthenticator(this); 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     return readerAccountAuthenticator.getIBinder(); 
    } 
} 

ReaderAccountAuthenticator

Nur grundlegende Methoden withoud Implementierung als mein Konto nur "Dummy" ist

authenticator.xml

<?xml version="1.0" encoding="utf-8"?> 
<account-authenticator 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:accountType="dummy.com" 
    /> 

Verwendung in MainActivity in onCreate() -Methode:

account = new Account(ACCOUNT, ACCOUNT_TYPE); 
     AccountManager accountManager = (AccountManager) MainActivity.this.getSystemService(ACCOUNT_SERVICE); 
     accountManager.addAccountExplicitly(account, null, null); 

     ContentResolver.setIsSyncable(account, AUTHORITY, 1); 
     ContentResolver.setSyncAutomatically(account, AUTHORITY, true); 
     ContentResolver.addPeriodicSync(account, AUTHORITY, Bundle.EMPTY, 2); 

Answer 1

ich das Problem gefunden habe, war in dieser Tatsache, dass ein minimales Intervall für die regelmäßige Synchronisation ist 1 Minute, also Synchronisation wurde jede Minute ausgelöst, aber nicht 2 Sekunden, wie ich eingestellt habe.

Problem gelöst.