我正在编写一个Android同步适配器,并且基本上遇到了无限循环同步的问题。一旦同步完成,它就会重新开始。
谢谢,
此致
阿克沙伊
@Override
public void onPerformSync(final Account account, final Bundle extras, final String authority, final ContentProviderClient provider, final SyncResult syncResult) {
Log.i("Sync result full sync = " + syncResult.fullSyncRequested);
Log.i("Sync result " + syncResult.toDebugString());
Log.i("Bundle " + extras.toString());
final CountDownLatch latch = new CountDownLatch(3);
final CachedDataReceiver globalStreamRefreshReciever = new CachedDataReceiver(null) {
@Override
protected void onComplete(int resultCode) {latch.countDown();}
@Override
protected void onError() {latch.countDown();}
};
final CachedDataReceiver newMessagesReciever = new CachedDataReceiver(null) {
@Override
protected void onComplete(int resultCode) {latch.countDown();}
@Override
protected void onError() {latch.countDown();}
};
final CachedDataReceiver getViewedMessagesReciever = new CachedDataReceiver(null) {
@Override
protected void onComplete(int resultCode) {latch.countDown();showAnyNewInboxItemAlerts(getApplicationContext());}
@Override
protected void onError() {latch.countDown();}
};
/*long currentTime = System.currentTimeMillis();
long netTime = currentTime-getLastSyncTimeStamp();
boolean shouldSync = (netTime - getSyncInterval()) >=0;
if (!shouldSync && getSyncInterval()!=Constants.INVALID_ITEM){
Log.i("Current time = " + currentTime + " last sync = " + getLastSyncTimeStamp() + " sync interval = " + getSyncInterval());
Log.i("Difference = " + (netTime - getSyncInterval()));
return;
}*/
if (user.isUserLoggedIn() && (!TextUtils.isEmpty(user.peekLoggedInUserAccountToken(null)))){
startService(api.getGlobalStream(0,10,globalStreamRefreshReciever));
startService(api.getNewMessagesInbox(newMessagesReciever));
startService(api.getViewedMessagesInbox(false, getViewedMessagesReciever));
addTimeStamp();
Log.i("in sync");
try {
latch.await(1, TimeUnit.MINUTES);
} catch (InterruptedException interruptedException) {
interruptedException.printStackTrace();
Log.e("Error in latch while sync ");
}
}
}
答案 0 :(得分:14)
你错过了很多代码,当你不告诉我们你在做什么时很难找到你的问题。
对你的问题进行猜测......
您创建的addTimeStamp()
或各种服务是否会修改ContentProvider中存储的数据?
如果是这样,您的ContentProvider会调用ContentResolver.notifyChange(uri, null)
吗?
如果是这样,您的ContentProvider会通知Android它已更改并需要同步,从而驱动循环。
API为notifyChange (Uri uri, ContentObserver observer, boolean syncToNetwork)
。您需要使用notifyChange(uri, null, false);
进行呼叫 - 这表示您已从网络中进行了更改,并且不应将其推回网络,从而打破了循环。
答案 1 :(得分:0)
当我们注册了ContentObserver时,即使将syncToNetwork设置为false,同步适配器也会进入循环。
notifyChange(uri, null, false);