Index: chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkUtils.java |
diff --git a/chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkUtils.java b/chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkUtils.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ed92cd321ee88432bd630dae39975ee1bd48f097 |
--- /dev/null |
+++ b/chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkUtils.java |
@@ -0,0 +1,61 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+package org.chromium.webapk.lib.common; |
+ |
+import android.content.Context; |
+import android.content.pm.ApplicationInfo; |
+import android.content.pm.PackageManager; |
+import android.content.pm.PackageManager.NameNotFoundException; |
+import android.os.Bundle; |
+ |
+/** |
+ * Contains utility methods for interacting with WebAPKs. |
+ */ |
+public class WebApkUtils { |
+ |
+ /** |
+ * Caches the value read from Application Metadata which specifies the host browser's package |
+ * name. |
+ */ |
+ private static String sHostPackage; |
+ |
+ /** |
+ * Returns a Context for the host browser that was specified when building the WebAPK. |
+ * @param context A context. |
+ * @return The remote context. Returns null on an error. |
+ */ |
+ public static Context getHostBrowserContext(Context context) { |
+ try { |
+ String hostPackage = getHostBrowserPackageName(context); |
+ return context.getApplicationContext().createPackageContext( |
+ hostPackage, |
+ Context.CONTEXT_IGNORE_SECURITY | Context.CONTEXT_INCLUDE_CODE); |
+ } catch (NameNotFoundException e) { |
+ e.printStackTrace(); |
+ } |
+ return null; |
+ } |
+ |
+ /** |
+ * Returns the package name for the host browser that was specified when building the WebAPK. |
+ * @param context A context. |
+ * @return The package name. Returns null on an error. |
+ */ |
+ public static String getHostBrowserPackageName(Context context) { |
+ if (sHostPackage != null) return sHostPackage; |
+ String hostPackage = null; |
+ try { |
+ ApplicationInfo ai = context.getPackageManager().getApplicationInfo( |
+ context.getPackageName(), PackageManager.GET_META_DATA); |
+ Bundle bundle = ai.metaData; |
+ hostPackage = bundle.getString("runtimeHost"); |
+ } catch (NameNotFoundException e) { |
+ e.printStackTrace(); |
+ } |
+ // Set {@link sHostPackage} to a non-null value so that the value is computed only once. |
+ sHostPackage = hostPackage != null ? hostPackage : ""; |
+ return sHostPackage; |
+ } |
+} |