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The source code is released under:
Apache License
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/* * Copyright (C) 2012 The Android Open Source Project */* w w w . j av a2 s .c o m*/ * 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.volley.toolbox; import java.io.File; import android.annotation.TargetApi; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.net.http.AndroidHttpClient; import android.os.Build; import com.android.volley.Network; import com.android.volley.RequestQueue; @TargetApi(Build.VERSION_CODES.FROYO) public class Volley { /** Default on-disk cache directory. */ private static final String DEFAULT_CACHE_DIR = "volley"; /** * Creates a default instance of the worker pool and calls {@link RequestQueue#start()} on it. * * @param context A {@link Context} to use for creating the cache dir. * @param stack An {@link HttpStack} to use for the network, or null for default. * @return A started {@link RequestQueue} instance. */ public static RequestQueue newRequestQueue(Context context, HttpStack stack) { File cacheDir = new File(context.getCacheDir(), DEFAULT_CACHE_DIR); String userAgent = null; try { String packageName = context.getPackageName(); PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0); userAgent = packageName + "/" + info.versionCode; } catch (NameNotFoundException e) { } if (stack == null) { if (Build.VERSION.SDK_INT >= 9) { stack = new HurlStack(userAgent); } else { // Prior to Gingerbread, HttpUrlConnection was unreliable. // See: http://android-developers.blogspot.com/2011/09/androids-http-clients.html stack = new HttpClientStack(AndroidHttpClient.newInstance(userAgent)); } } Network network = new BasicNetwork(stack); RequestQueue queue = new RequestQueue(new DiskLruBasedCache(cacheDir), network); queue.start(); return queue; } /** * chenbo add ????Http???????????????????????? * ?????????? * newNoCacheRequestQueue * @param context * @param stack * @return * @since 3.5 */ public static RequestQueue newNoCacheRequestQueue(Context context) { String userAgent = null; try { String packageName = context.getPackageName(); PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0); userAgent = packageName + "/" + info.versionCode; } catch (NameNotFoundException e) { } HttpStack stack = null; if (Build.VERSION.SDK_INT >= 9) { stack = new HurlStack(userAgent); } else { // Prior to Gingerbread, HttpUrlConnection was unreliable. // See: // http://android-developers.blogspot.com/2011/09/androids-http-clients.html stack = new HttpClientStack(AndroidHttpClient.newInstance(userAgent)); } Network network = new BasicNetwork(stack); RequestQueue queue = new RequestQueue(new NoCache(), network); queue.start(); return queue; } /** * Creates a default instance of the worker pool and calls {@link RequestQueue#start()} on it. * * @param context A {@link Context} to use for creating the cache dir. * @return A started {@link RequestQueue} instance. */ public static RequestQueue newRequestQueue(Context context) { return newRequestQueue(context, null); } public static File getDefaultCacheFile(Context context) { return new File(context.getCacheDir(), DEFAULT_CACHE_DIR); } }