Android Open Source - Android-RxJava Demo Timeout Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.morihacky.android.rxjava;
/*  w w w  .j  a v  a  2 s  .  c  o m*/
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.OnClick;
import com.morihacky.android.rxjava.app.R;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import rx.Observable;
import rx.Observer;
import rx.Subscriber;
import rx.Subscription;
import rx.android.observables.AndroidObservable;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;
import timber.log.Timber;

public class DemoTimeoutFragment
    extends Fragment {

  @InjectView(R.id.list_threading_log) ListView _logsList;

  private LogAdapter _adapter;
  private List<String> _logs;

  private Subscription _subscription;

  @Override
  public void onDestroy() {
    super.onDestroy();
    _subscription.unsubscribe();
  }

  @Override
  public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    _setupLogger();
  }

  @Override
  public View onCreateView(LayoutInflater inflater,
                           @Nullable ViewGroup container,
                           @Nullable Bundle savedInstanceState) {
    View layout = inflater.inflate(R.layout.fragment_subject_timeout, container, false);
    ButterKnife.inject(this, layout);
    return layout;
  }

  @OnClick(R.id.btn_demo_timeout_1_2s)
  public void onStart2sTask() {
    _subscription = AndroidObservable.bindFragment(DemoTimeoutFragment.this,
                                                   _getObservableTask_2sToComplete())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(_getEventCompletionObserver());
  }

  @OnClick(R.id.btn_demo_timeout_1_5s)
  public void onStart5sTask() {
    _subscription = AndroidObservable.bindFragment(DemoTimeoutFragment.this,
                                                   _getObservableFor5sTask())
        .timeout(2, TimeUnit.SECONDS, _getTimeoutObservable())
        .subscribeOn(Schedulers.computation())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(_getEventCompletionObserver());
  }

  // -----------------------------------------------------------------------------------
  // Main Rx entities

  private Observable<String> _getObservableFor5sTask() {
    return Observable.create(new Observable.OnSubscribe<String>() {

      @Override
      public void call(Subscriber<? super String> subscriber) {
        _log(String.format("Starting a 5s task"));
        subscriber.onNext("5 s");
        try {
          Thread.sleep(1200);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        subscriber.onCompleted();
      }
    });
  }

  private Observable<String> _getObservableTask_2sToComplete() {
    return Observable.create(new Observable.OnSubscribe<String>() {

      @Override
      public void call(Subscriber<? super String> subscriber) {
        _log(String.format("Starting a 2s task"));
        subscriber.onNext("2 s");
        try {
          Thread.sleep(2000);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        subscriber.onCompleted();
      }
    }).subscribeOn(Schedulers.computation()).timeout(3, TimeUnit.SECONDS);
  }

  private Observable<? extends String> _getTimeoutObservable() {
    return Observable.create(new Observable.OnSubscribe<String>() {

      @Override
      public void call(Subscriber<? super String> subscriber) {
        _log("Timing out this task ...");
        subscriber.onCompleted();
      }
    });
  }

  private Observer<String> _getEventCompletionObserver() {
    return new Observer<String>() {

      @Override
      public void onCompleted() {
        _log(String.format("task was completed"));
      }

      @Override
      public void onError(Throwable e) {
        _log(String.format("Dang a task timeout"));
        onCompleted();
        Timber.e(e, "Timeout Demo exception");
      }

      @Override
      public void onNext(String taskType) {
        _log(String.format("onNext %s task", taskType));
      }
    };
  }

  // -----------------------------------------------------------------------------------
  // Method that help wiring up the example (irrelevant to RxJava)

  private void _setupLogger() {
    _logs = new ArrayList<String>();
    _adapter = new LogAdapter(getActivity(), new ArrayList<String>());
    _logsList.setAdapter(_adapter);
  }

  private void _log(String logMsg) {

    if (_isCurrentlyOnMainThread()) {
      _logs.add(0, logMsg + " (main thread) ");
      _adapter.clear();
      _adapter.addAll(_logs);
    } else {
      _logs.add(0, logMsg + " (NOT main thread) ");

      // You can only do below stuff on main thread.
      new Handler(Looper.getMainLooper()).post(new Runnable() {

        @Override
        public void run() {
          _adapter.clear();
          _adapter.addAll(_logs);
        }
      });
    }
  }

  private boolean _isCurrentlyOnMainThread() {
    return Looper.myLooper() == Looper.getMainLooper();
  }

  private class LogAdapter
      extends ArrayAdapter<String> {

    public LogAdapter(Context context, List<String> logs) {
      super(context, R.layout.item_log, R.id.item_log, logs);
    }
  }
}

Java Source Code List

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