Add ActionBarCompat sample (CL 1 of 2)

Change-Id: Ie41aee3fc805bf73ef0cd673049fcb608b59275c

samples/ActionBarCompat/src/com/example/android/actionbarcompat/ActionBarActivity.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2011 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.example.android.actionbarcompat;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuInflater;
+
+/**
+ * A base activity that defers common functionality across app activities to an {@link
+ * ActionBarHelper}.
+ *
+ * NOTE: dynamically marking menu items as invisible/visible is not currently supported.
+ *
+ * NOTE: this may used with the Android Compatibility Package by extending
+ * android.support.v4.app.FragmentActivity instead of {@link Activity}.
+ */
+public abstract class ActionBarActivity extends Activity {
+    final ActionBarHelper mActionBarHelper = ActionBarHelper.createInstance(this);
+
+    /**
+     * Returns the {@link ActionBarHelper} for this activity.
+     */
+    protected ActionBarHelper getActionBarHelper() {
+        return mActionBarHelper;
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    public MenuInflater getMenuInflater() {
+        return mActionBarHelper.getMenuInflater(super.getMenuInflater());
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mActionBarHelper.onCreate(savedInstanceState);
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    protected void onPostCreate(Bundle savedInstanceState) {
+        super.onPostCreate(savedInstanceState);
+        mActionBarHelper.onPostCreate(savedInstanceState);
+    }
+
+    /**
+     * Base action bar-aware implementation for
+     * {@link Activity#onCreateOptionsMenu(android.view.Menu)}.
+     *
+     * Note: marking menu items as invisible/visible is not currently supported.
+     */
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        boolean retValue = false;
+        retValue |= mActionBarHelper.onCreateOptionsMenu(menu);
+        retValue |= super.onCreateOptionsMenu(menu);
+        return retValue;
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    protected void onTitleChanged(CharSequence title, int color) {
+        mActionBarHelper.onTitleChanged(title, color);
+        super.onTitleChanged(title, color);
+    }
+}