Improve browser startup time
A number of optimizations are made to improve the time to interact with the UI quicker.
Steps are made to parallelize the web engine initialization while others removed
impediments to the UI bring up.
Changes:
- Engine Initialization is moved to an async task.
- A new NoShow BrowserLauncher activity is added to chain-load BrowserActivity at startup
obviating the blank white screen shown.
- Native libraries are loaded asynchronously in a background thread.
- ResourceExtractor is started much earlier than before.
- BrowserSettings is synced to native only after engine initialization.
- Other parts of UI are made aware of engine initialization state to throttle actions.
Change-Id: Icd4959769fa9813170baf7023c46b696b30dfed1
diff --git a/src/com/android/browser/BrowserLauncher.java b/src/com/android/browser/BrowserLauncher.java
new file mode 100644
index 0000000..a50b519
--- /dev/null
+++ b/src/com/android/browser/BrowserLauncher.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package com.android.browser;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+
+// This is a NoShow activity for chain-loading BrowserActivity.
+// Avoid doing any heavy operations in this activity.
+public class BrowserLauncher extends Activity {
+
+ @Override
+ public void onCreate(Bundle paramBundle)
+ {
+ super.onCreate(paramBundle);
+ Intent localIntent = new Intent(getIntent());
+ localIntent.setClassName(getApplicationContext().getPackageName(), BrowserActivity.class.getName());
+ localIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_NEW_TASK);
+ startActivity(localIntent);
+ finish();
+ }
+}