Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2016, 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.
 */

import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import static com.google.common.base.Preconditions.checkNotNull;

public class Main {
    /**
     * The {@code fragment} is added to the container view with id {@code frameId}. The operation is
     * performed by the {@code fragmentManager}.
     *
     */
    public static void addFragmentToActivity(@NonNull FragmentManager fragmentManager, @NonNull Fragment fragment,
            int frameId) {
        checkNotNull(fragmentManager);
        checkNotNull(fragment);
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.add(frameId, fragment);
        transaction.commit();
    }

    public static <T extends Fragment> T addFragmentToActivity(@NonNull FragmentManager fragmentManager,
            @NonNull Class<T> clz, @NonNull Integer frameId) {
        checkNotNull(fragmentManager);
        checkNotNull(clz);
        checkNotNull(frameId);
        T fragment = (T) fragmentManager.findFragmentById(frameId);
        if (fragment == null) {
            try {
                fragment = clz.newInstance();
                FragmentTransaction transaction = fragmentManager.beginTransaction();
                transaction.add(frameId, fragment);
                transaction.commit();
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        return fragment;
    }
}