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/*
* 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.apis.app;
import com.example.android.apis.R;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.CheckBox;
/**
* Demonstrates how fragments can participate in the options menu.
*/
public class FragmentMenuFragment extends Fragment {
Fragment mFragment1;
Fragment mFragment2;
CheckBox mCheckBox1;
CheckBox mCheckBox2;
// Update fragment visibility when check boxes are changed.
final OnClickListener mClickListener = new OnClickListener() {
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 FragmentMenu.MenuFragment();
ft.add(mFragment1, "f1");
}
mFragment2 = fm.findFragmentByTag("f2");
if (mFragment2 == null) {
mFragment2 = new FragmentMenu.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();
}
}
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