OpenTracks/MyTracks/src/com/google/android/apps/mytracks/AbstractMyTracksActivity.java

/*
 * Copyright 2012 Google Inc.
 * 
 * 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.google.android.apps.mytracks;

import com.google.android.apps.mytracks.util.ApiAdapterFactory;

import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.support.v4.app.FragmentActivity;
import android.view.MenuItem;

/**
 * An abstract class for all My Tracks activities.
 * 
 * @author Jimmy Shih
 */
public abstract class AbstractMyTracksActivity extends FragmentActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setVolumeControlStream(TextToSpeech.Engine.DEFAULT_STREAM);

    // Hide title must be before setContentView
    if (hideTitle()) {
      ApiAdapterFactory.getApiAdapter().hideTitle(this);
    }

    setContentView(getLayoutResId());

    // Configure action bar must be after setContentView
    if (configureActionBarHomeAsUp()) {
      ApiAdapterFactory.getApiAdapter().configureActionBarHomeAsUp(this);
    }
  }

  /**
   * Gets the layout resource id.
   */
  protected abstract int getLayoutResId();

  /**
   * Returns true to hide the title. Be default, do not hide the title.
   */
  protected boolean hideTitle() {
    return false;
  }

  /**
   * Returns true to configure the action bar home button as the up button.
   */
  protected boolean configureActionBarHomeAsUp() {
    return true;
  }

  /**
   * Callback when the home menu item is selected.
   */
  protected void onHomeSelected() {
    finish();
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
      onHomeSelected();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
}