Java tutorial
/* * Copyright (C) 2011 The Android Open Source Project * * 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 com.android.test.gallery3d.common; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.os.Build; import android.util.Log; import org.apache.http.HttpVersion; import org.apache.http.client.HttpClient; import org.apache.http.conn.params.ConnManagerParams; import org.apache.http.params.CoreProtocolPNames; import org.apache.http.params.HttpParams; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; /** * Constructs {@link HttpClient} instances and isolates client code from API * level differences. */ public final class HttpClientFactory { // TODO: migrate GDataClient to use this util method instead of apache's // DefaultHttpClient. /** * Creates an HttpClient with the userAgent string constructed from the * package name contained in the context. * @return the client */ public static HttpClient newHttpClient(Context context) { return HttpClientFactory.newHttpClient(getUserAgent(context)); } /** * Creates an HttpClient with the specified userAgent string. * @param userAgent the userAgent string * @return the client */ public static HttpClient newHttpClient(String userAgent) { // AndroidHttpClient is available on all platform releases, // but is hidden until API Level 8 try { Class<?> clazz = Class.forName("android.net.http.AndroidHttpClient"); Method newInstance = clazz.getMethod("newInstance", String.class); Object instance = newInstance.invoke(null, userAgent); HttpClient client = (HttpClient) instance; // ensure we default to HTTP 1.1 HttpParams params = client.getParams(); params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1); // AndroidHttpClient sets these two parameters thusly by default: // HttpConnectionParams.setSoTimeout(params, 60 * 1000); // HttpConnectionParams.setConnectionTimeout(params, 60 * 1000); // however it doesn't set this one... ConnManagerParams.setTimeout(params, 60 * 1000); return client; } catch (InvocationTargetException e) { throw new RuntimeException(e); } catch (ClassNotFoundException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } catch (IllegalAccessException e) { throw new RuntimeException(e); } } /** * Closes an HttpClient. */ public static void close(HttpClient client) { // AndroidHttpClient is available on all platform releases, // but is hidden until API Level 8 try { Class<?> clazz = client.getClass(); Method method = clazz.getMethod("close", (Class<?>[]) null); method.invoke(client, (Object[]) null); } catch (InvocationTargetException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } catch (IllegalAccessException e) { throw new RuntimeException(e); } } private static String sUserAgent = null; private static String getUserAgent(Context context) { if (sUserAgent == null) { PackageInfo pi; try { pi = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); } catch (NameNotFoundException e) { throw new IllegalStateException("getPackageInfo failed"); } sUserAgent = String.format("%s/%s; %s/%s/%s/%s; %s/%s/%s", pi.packageName, pi.versionName, Build.BRAND, Build.DEVICE, Build.MODEL, Build.ID, Build.VERSION.SDK, Build.VERSION.RELEASE, Build.VERSION.INCREMENTAL); } return sUserAgent; } private HttpClientFactory() { } }