HelpUtils.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 cheng.app.cnbeta.util;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

import cheng.app.cnbeta.AboutFragment;
import cheng.app.cnbeta.OpenSourceLicensesFragment;

/**
 * This is a set of helper methods for showing contextual help information in the app.
 */
public class HelpUtils {
    public static void showAbout(FragmentActivity activity) {
        FragmentManager fm = activity.getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        Fragment prev = fm.findFragmentByTag("dialog_about");
        if (prev != null) {
            ft.remove(prev);
        }
        ft.addToBackStack(null);
        new AboutFragment().show(ft, "dialog_about");
    }

    public static void showOpenSourceLicenses(FragmentActivity activity) {
        FragmentManager fm = activity.getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        Fragment prev = fm.findFragmentByTag("dialog_licenses");
        if (prev != null) {
            ft.remove(prev);
        }
        ft.addToBackStack(null);

        new OpenSourceLicensesFragment().show(ft, "dialog_licenses");
    }

}