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app/src/main/java/com/android/volley/toolbox/Volley.java

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+/*
+ * Copyright (C) 2012 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.volley.toolbox;
+
+import java.io.File;
+
+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;
+
+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 = "volley/0";
+        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();
+            } 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 DiskBasedCache(cacheDir), 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);
+    }
+}