Java tutorial
/* * Copyright (C) 2017, Andrew Chen * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package rx2.receiver.local.android; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Looper; import android.support.annotation.NonNull; import android.support.v4.content.LocalBroadcastManager; import io.reactivex.Observable; import io.reactivex.ObservableEmitter; import io.reactivex.ObservableOnSubscribe; import io.reactivex.Scheduler; import io.reactivex.functions.Cancellable; import static io.reactivex.android.schedulers.AndroidSchedulers.mainThread; public class RxReceiverLocal { /** * * @param context * @param intentFilter * @return */ @NonNull public static Observable<Intent> receives(@NonNull final Context context, @NonNull final IntentFilter intentFilter) { return Observable.create(new ObservableOnSubscribe<Intent>() { @Override public void subscribe(final ObservableEmitter<Intent> emitter) { final BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { emitter.onNext(intent); } }; LocalBroadcastManager.getInstance(context).registerReceiver(receiver, intentFilter); emitter.setCancellable(new Cancellable() { @Override public void cancel() throws Exception { if (Looper.getMainLooper() == Looper.myLooper()) { LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver); } else { final Scheduler.Worker inner = mainThread().createWorker(); inner.schedule(new Runnable() { @Override public void run() { LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver); inner.dispose(); } }); } } }); } }); } }