选项1。在一个单独的类用于同步对类对象
clearDb();
dataList = fetchDataFromHttp();
saveToDb(dataList);
:
public class WorkerClass {
private WorkerListener workerListener;
public static interface WorkerListener {
public void publishWorkProgress(String data);
}
public WorkerClass(WorkerListener workerListener) {
this.workerListener = workerListener;
}
public void performWork() {
synchronized (WorkerClass.class) {
clearDb();
publish("Cleared DB");
dataList = fetchDataFromHttp();
publish("Got http data");
saveToDb(dataList);
publish("There! saved!");
}
}
private void publish(String message) {
if(workerListener != null) {
workerListener.publishWorkProgress(message);
}
}
}
虽然从活动:
public class SampleActivity extends Activity {
public void doTheThing() {
new MyAsyncTask().execute();
}
private static class MyAsyncTask extends AsyncTask<Void, String, Void> implements WorkerListener {
@Override
protected Void doInBackground(Void... params) {
new WorkerClass(this).performWork();
return null;
}
@Override
public void publishWorkProgress(String data) {
publishProgress(data);
}
}
}
选项2:移动上述代码的移动上述IntentService:
public class WorkerIntentService extends IntentService {
public WorkerIntentService() {
super(null);
}
@Override
protected void onHandleIntent(Intent intent) {
clearDb();
dataList = fetchDataFromHttp();
saveToDb(dataList);
}
}
使用IntentService可确保任务按顺序执行。
您是否正在扩展ORMLite附带的活动并在异步任务中使用getHelper? – DArkO
您是否尝试过与您同步的目的? –