| /* |
| * Copyright (C) 2012 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.supportv4.app; |
| |
| import com.example.android.supportv4.R; |
| |
| import android.support.v4.app.Fragment; |
| import android.support.v4.app.FragmentManager; |
| import android.support.v4.app.FragmentTransaction; |
| |
| import android.os.Bundle; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.View.OnClickListener; |
| import android.widget.CheckBox; |
| |
| /** |
| * Demonstrates how fragments can participate in the options menu. |
| */ |
| public class FragmentMenuFragmentSupport extends Fragment { |
| Fragment mFragment1; |
| Fragment mFragment2; |
| CheckBox mCheckBox1; |
| CheckBox mCheckBox2; |
| |
| // Update fragment visibility when check boxes are changed. |
| final OnClickListener mClickListener = new OnClickListener() { |
| @Override |
| public void onClick(View v) { |
| updateFragmentVisibility(); |
| } |
| }; |
| |
| @Override |
| public View onCreateView(LayoutInflater inflater, ViewGroup container, |
| Bundle savedInstanceState) { |
| View v = inflater.inflate(R.layout.fragment_menu, container, false); |
| |
| // Make sure the two menu fragments are created. |
| FragmentManager fm = getChildFragmentManager(); |
| FragmentTransaction ft = fm.beginTransaction(); |
| mFragment1 = fm.findFragmentByTag("f1"); |
| if (mFragment1 == null) { |
| mFragment1 = new FragmentMenuSupport.MenuFragment(); |
| ft.add(mFragment1, "f1"); |
| } |
| mFragment2 = fm.findFragmentByTag("f2"); |
| if (mFragment2 == null) { |
| mFragment2 = new FragmentMenuSupport.Menu2Fragment(); |
| ft.add(mFragment2, "f2"); |
| } |
| ft.commit(); |
| |
| // Watch check box clicks. |
| mCheckBox1 = (CheckBox)v.findViewById(R.id.menu1); |
| mCheckBox1.setOnClickListener(mClickListener); |
| mCheckBox2 = (CheckBox)v.findViewById(R.id.menu2); |
| mCheckBox2.setOnClickListener(mClickListener); |
| |
| // Make sure fragments start out with correct visibility. |
| updateFragmentVisibility(); |
| |
| return v; |
| } |
| |
| @Override |
| public void onViewStateRestored(Bundle savedInstanceState) { |
| super.onViewStateRestored(savedInstanceState); |
| // Make sure fragments are updated after check box view state is restored. |
| updateFragmentVisibility(); |
| } |
| |
| // Update fragment visibility based on current check box state. |
| void updateFragmentVisibility() { |
| FragmentTransaction ft = getChildFragmentManager().beginTransaction(); |
| if (mCheckBox1.isChecked()) ft.show(mFragment1); |
| else ft.hide(mFragment1); |
| if (mCheckBox2.isChecked()) ft.show(mFragment2); |
| else ft.hide(mFragment2); |
| ft.commit(); |
| } |
| } |