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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.supportv4.app;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.example.android.supportv4.R;
public class FragmentStackFragmentSupport extends Fragment {
int mStackLevel = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
// Do first time initialization -- add initial fragment.
Fragment newFragment = FragmentStackSupport.CountingFragment.newInstance(mStackLevel);
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
ft.add(R.id.simple_fragment, newFragment).commit();
} else {
mStackLevel = savedInstanceState.getInt("level");
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_stack, container, false);
// Watch for button clicks.
Button button = (Button)v.findViewById(R.id.new_fragment);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
addFragmentToStack();
}
});
button = (Button)v.findViewById(R.id.delete_fragment);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
getChildFragmentManager().popBackStack();
}
});
button = (Button)v.findViewById(R.id.home);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// If there is a back stack, pop it all.
FragmentManager fm = getChildFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
fm.popBackStack(fm.getBackStackEntryAt(0).getId(),
FragmentManager.POP_BACK_STACK_INCLUSIVE);
}
}
});
return v;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("level", mStackLevel);
}
void addFragmentToStack() {
mStackLevel++;
// Instantiate a new fragment.
Fragment newFragment = FragmentStackSupport.CountingFragment.newInstance(mStackLevel);
// Add the fragment to the activity, pushing this transaction
// on to the back stack.
FragmentTransaction ft = getChildFragmentManager().beginTransaction();
ft.replace(R.id.simple_fragment, newFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();
}
}
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