Java tutorial
/* * Copyright (C) 2013 Square, Inc. * * 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 retrofit; import android.os.Build; import android.os.Handler; import android.os.Looper; import com.squareup.okhttp.OkHttpClient; import java.util.concurrent.Executor; import java.util.concurrent.TimeUnit; class Platform { private static final Platform PLATFORM = findPlatform(); static Platform get() { return PLATFORM; } private static Platform findPlatform() { try { Class.forName("android.os.Build"); if (Build.VERSION.SDK_INT != 0) { return new Android(); } } catch (ClassNotFoundException ignored) { } return new Platform(); } CallAdapter.Factory defaultCallAdapterFactory(Executor callbackExecutor) { if (callbackExecutor != null) { return new ExecutorCallAdapterFactory(callbackExecutor); } return DefaultCallAdapter.FACTORY; } OkHttpClient defaultClient() { OkHttpClient client = new OkHttpClient(); client.setConnectTimeout(15, TimeUnit.SECONDS); client.setReadTimeout(15, TimeUnit.SECONDS); client.setWriteTimeout(15, TimeUnit.SECONDS); return client; } /** Provides sane defaults for operation on Android. */ static class Android extends Platform { @Override CallAdapter.Factory defaultCallAdapterFactory(Executor callbackExecutor) { if (callbackExecutor == null) { callbackExecutor = new MainThreadExecutor(); } return new ExecutorCallAdapterFactory(callbackExecutor); } static class MainThreadExecutor implements Executor { private final Handler handler = new Handler(Looper.getMainLooper()); @Override public void execute(Runnable r) { handler.post(r); } @Override public String toString() { return "MainThreadExecutor"; } } } }