gecko-dev/mobile/android/base/LocaleAware.java

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.gecko;

import org.mozilla.gecko.BrowserLocaleManager;
import org.mozilla.gecko.LocaleManager;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.StrictMode;
import android.support.v4.app.FragmentActivity;

/**
 * This is a helper class to do typical locale switching operations
 * without hitting StrictMode errors or adding boilerplate to common
 * activity subclasses.
 *
 * Either call {@link LocaleAware#initializeLocale(Context)} in your
 * <code>onCreate</code> method, or inherit from <code>LocaleAwareFragmentActivity</code>
 * or <code>LocaleAwareActivity</code>.
 */
public class LocaleAware {
  public static void initializeLocale(Context context) {
    final LocaleManager localeManager = BrowserLocaleManager.getInstance();
    final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
    StrictMode.allowThreadDiskWrites();
    try {
      localeManager.getAndApplyPersistedLocale(context);
    } finally {
      StrictMode.setThreadPolicy(savedPolicy);
    }
  }

  public static class LocaleAwareFragmentActivity extends FragmentActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      LocaleAware.initializeLocale(getApplicationContext());
      super.onCreate(savedInstanceState);
    }
  }

  public static class LocaleAwareActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      LocaleAware.initializeLocale(getApplicationContext());
      super.onCreate(savedInstanceState);
    }
  }
}