使用AbstractThreadedSyncAdapter同步Android数据库:不调用onPerformSync

时间:2012-06-19 11:15:57

标签: android sqlite service synchronization android-syncadapter

我正在尝试使用AbstractThreadedSyncAdapter将我的本地数据库与我的服务器同步。我按照我发现的指南,但我不能让它工作。它适用于Android 2.2。

我的Authenticator系统正常运行。在我的AccountAuthenticatorActivity中,创建帐户后,我执行:

Bundle params = new Bundle();
params.putBoolean(ContentResolver.SYNC_EXTRAS_EXPEDITED, false);
params.putBoolean(ContentResolver.SYNC_EXTRAS_DO_NOT_RETRY, false);
params.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, false);
ContentResolver.addPeriodicSync(account, "com.syncal.authority", params, 30);
ContentResolver.setSyncAutomatically(account, "com.syncal.authority", true);
ContentResolver.requestSync(account,"com.syncal.authority",params);

我创建了我的SyncService,并在清单中声明了它。一些功能:

@Override
public IBinder onBind(Intent intent) {
    Log.i(TAG, "inBind() " + intent.getAction());
    return getSyncAdapter().getSyncAdapterBinder();
}

private synchronized AbstractThreadedSyncAdapter getSyncAdapter() {
    Log.i(TAG, "getSyncAdapter()");
    if (mSyncAdapter == null) {
         mSyncAdapter = new SweetSyncAdapter(this, true);
    }
    return mSyncAdapter;
}

然后我实现了我的SyncAdapter。 onPerformSync函数是空的,我只是想知道它是否被调用,并且它永远不会被调用。

public class SweetSyncAdapter extends AbstractThreadedSyncAdapter {

    Context mContext;
    private String AUTH_TOKEN_TYPE;
    private AccountManager mAccountManager;
    private String mAuthToken;
    private final String TAG = "SweetContactSync";
    static final String LAST_SYNC_KEY = "lastSync";

    public SweetSyncAdapter(Context context, boolean autoInitialize) {
        super(context, autoInitialize);
        Log.i(TAG, "SweetSyncAdapter");
        mContext = context;
        AUTH_TOKEN_TYPE = mContext.getString(R.string.account_type);
        mAccountManager = AccountManager.get(mContext);
    }

    public interface ISugarRunnable {
         public void run() throws URISyntaxException, OperationCanceledException, AuthenticatorException, IOException,
            AuthenticationException;
    }

    class SugarRunnable implements Runnable {
        ISugarRunnable r;
        Account mAccount;
        SyncResult mSyncResult;

        public SugarRunnable(Account acc, SyncResult syncResult, ISugarRunnable _r) {
            r = _r;
            mAccount = acc;
            mSyncResult = syncResult;
        }

        public void run() {
            try {
                r.run();
    } catch ... //All the catchs
        }
    }

    @Override
    public void onPerformSync(final Account account, Bundle extras, String authority,
                ContentProviderClient provider, SyncResult syncResult) {
        Log.i(TAG, "onPerformSync()");
    }
}

我的xml / sync_adapter.xml包含以下代码:

<?xml version="1.0" encoding="utf-8"?>
<sync-adapter xmlns:android="http://schemas.android.com/apk/res/android"
    android:contentAuthority="com.syncal.authority"
    android:accountType="com.syncal.account"   
/>

这是清单的服务部分:

<service android:name=".sweet.SweetSyncService" android:exported="true"
    android:label="@string/app_name">
    <intent-filter>
        <action android:name="android.content.SyncAdapter" />
    </intent-filter>

    <meta-data android:name="android.content.SyncAdapter"
        android:resource="@xml/sync_adapter" />

</service>

我甚至创建了我自己的ContentProvider(函数是空的,它们只是在日志中写入),因为我所遵循的指南说它是必需的,我也在清单中声明它,但没有调用任何函数。

有人知道为什么我的onPerformSync函数没有被调用吗?我的SweetSyncService的onBind函数被调用,它创建了我的SweetSyncAdapter,但我的日志没有显示任何消息。

感谢您的阅读,我知道我输入了很多代码,但我已经有一段时间了,我无法解决它。

1 个答案:

答案 0 :(得分:2)

我终于找到了错误。我在清单中添加了一些权限,现在可以使用了:

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