Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkVersionManager.java |
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkVersionManager.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkVersionManager.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e6f84a8f6e734a61b457328151d1558f8c5f5780 |
--- /dev/null |
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkVersionManager.java |
@@ -0,0 +1,53 @@ |
+// 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.chrome.browser.webapps; |
+ |
+import android.content.Context; |
+import android.content.SharedPreferences; |
+ |
+import org.chromium.base.ContextUtils; |
+import org.chromium.base.FileUtils; |
+import org.chromium.base.ThreadUtils; |
+import org.chromium.webapk.lib.client.DexOptimizer; |
+ |
+import java.io.File; |
+ |
+/** |
+ * Updates installed WebAPKs after a Chrome update. |
+ */ |
+public class WebApkVersionManager { |
+ /** |
+ * Name of the shared preference to store whether an attempt to extract the WebAPK runtime |
+ * library was made. |
+ */ |
+ private static final String TRIED_EXTRACTING_DEX_PREF = |
+ "org.chromium.chrome.browser.webapps.TRIED_EXTRACTING_DEX"; |
+ |
+ /** |
+ * Tries to extract the WebAPK runtime dex from the Chrome APK if it has not tried already. |
+ * Should not be called on UI thread. |
+ */ |
+ public static void updateWebApksIfNeeded() { |
+ assert !ThreadUtils.runningOnUiThread(); |
+ |
+ SharedPreferences preferences = ContextUtils.getAppSharedPreferences(); |
+ if (preferences.getBoolean(TRIED_EXTRACTING_DEX_PREF, false)) { |
+ return; |
+ } |
+ |
+ preferences.edit().putBoolean(TRIED_EXTRACTING_DEX_PREF, true).apply(); |
+ |
+ Context context = ContextUtils.getApplicationContext(); |
+ File dexDir = context.getDir("dex", Context.MODE_PRIVATE); |
+ File dexFile = new File(dexDir, "web_apk.dex"); |
+ if (!FileUtils.extractAsset(context, "web_apk.dex", dexFile) |
+ || !DexOptimizer.optimize(dexFile)) { |
+ return; |
+ } |
+ |
+ // Make dex file world-readable so that WebAPK can use it. |
+ dexFile.setReadable(true, false); |
+ } |
+} |