| /* |
| * Copyright (C) 2010 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.Activity; |
| import android.app.Fragment; |
| import android.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.Button; |
| import android.widget.TextView; |
| |
| public class FragmentStack extends Activity { |
| int mStackLevel = 1; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.fragment_stack); |
| |
| // Watch for button clicks. |
| Button button = (Button)findViewById(R.id.new_fragment); |
| button.setOnClickListener(new OnClickListener() { |
| public void onClick(View v) { |
| addFragmentToStack(); |
| } |
| }); |
| |
| if (savedInstanceState == null) { |
| // Do first time initialization -- add initial fragment. |
| Fragment newFragment = CountingFragment.newInstance(mStackLevel); |
| FragmentTransaction ft = getFragmentManager().openTransaction(); |
| ft.add(R.id.simple_fragment, newFragment).commit(); |
| } else { |
| mStackLevel = savedInstanceState.getInt("level"); |
| } |
| } |
| |
| @Override |
| public void onSaveInstanceState(Bundle outState) { |
| super.onSaveInstanceState(outState); |
| outState.putInt("level", mStackLevel); |
| } |
| |
| //BEGIN_INCLUDE(add_stack) |
| void addFragmentToStack() { |
| mStackLevel++; |
| |
| // Instantiate a new fragment. |
| Fragment newFragment = CountingFragment.newInstance(mStackLevel); |
| |
| // Add the fragment to the activity, pushing this transaction |
| // on to the back stack. |
| FragmentTransaction ft = getFragmentManager().openTransaction(); |
| ft.replace(R.id.simple_fragment, newFragment); |
| ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); |
| ft.addToBackStack(null); |
| ft.commit(); |
| } |
| //END_INCLUDE(add_stack) |
| |
| //BEGIN_INCLUDE(fragment) |
| public static class CountingFragment extends Fragment { |
| int mNum; |
| |
| /** |
| * Create a new instance of CountingFragment, providing "num" |
| * as an argument. |
| */ |
| static CountingFragment newInstance(int num) { |
| CountingFragment f = new CountingFragment(); |
| |
| // Supply num input as an argument. |
| Bundle args = new Bundle(); |
| args.putInt("num", num); |
| f.setArguments(args); |
| |
| return f; |
| } |
| |
| /** |
| * When creating, retrieve this instance's number from its arguments. |
| */ |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| mNum = getArguments().getInt("num"); |
| } |
| |
| /** |
| * The Fragment's UI is just a simple text view showing its |
| * instance number. |
| */ |
| @Override |
| public View onCreateView(LayoutInflater inflater, ViewGroup container, |
| Bundle savedInstanceState) { |
| View v = inflater.inflate(R.layout.hello_world, container, false); |
| View tv = v.findViewById(R.id.text); |
| ((TextView)tv).setText("Fragment #" + mNum); |
| return v; |
| } |
| } |
| //END_INCLUDE(fragment) |
| } |