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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.supportv4.app;
     18 
     19 import com.example.android.supportv4.R;
     20 
     21 import android.support.v4.app.Fragment;
     22 import android.support.v4.app.FragmentActivity;
     23 import android.support.v4.app.FragmentTransaction;
     24 
     25 import android.os.Bundle;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 import android.view.View.OnClickListener;
     30 import android.widget.Button;
     31 import android.widget.TextView;
     32 
     33 public class FragmentCustomAnimationSupport extends FragmentActivity {
     34     int mStackLevel = 1;
     35 
     36     @Override
     37     protected void onCreate(Bundle savedInstanceState) {
     38         super.onCreate(savedInstanceState);
     39         setContentView(R.layout.fragment_stack);
     40 
     41         // Watch for button clicks.
     42         Button button = (Button)findViewById(R.id.new_fragment);
     43         button.setOnClickListener(new OnClickListener() {
     44             public void onClick(View v) {
     45                 addFragmentToStack();
     46             }
     47         });
     48 
     49         if (savedInstanceState == null) {
     50             // Do first time initialization -- add initial fragment.
     51             Fragment newFragment = CountingFragment.newInstance(mStackLevel);
     52             FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
     53             ft.add(R.id.simple_fragment, newFragment).commit();
     54         } else {
     55             mStackLevel = savedInstanceState.getInt("level");
     56         }
     57     }
     58 
     59     @Override
     60     public void onSaveInstanceState(Bundle outState) {
     61         super.onSaveInstanceState(outState);
     62         outState.putInt("level", mStackLevel);
     63     }
     64 
     65 //BEGIN_INCLUDE(add_stack)
     66     void addFragmentToStack() {
     67         mStackLevel++;
     68 
     69         // Instantiate a new fragment.
     70         Fragment newFragment = CountingFragment.newInstance(mStackLevel);
     71 
     72         // Add the fragment to the activity, pushing this transaction
     73         // on to the back stack.
     74         FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
     75         ft.setCustomAnimations(R.anim.fragment_slide_left_enter,
     76                 R.anim.fragment_slide_left_exit,
     77                 R.anim.fragment_slide_right_enter,
     78                 R.anim.fragment_slide_right_exit);
     79         ft.replace(R.id.simple_fragment, newFragment);
     80         ft.addToBackStack(null);
     81         ft.commit();
     82     }
     83 //END_INCLUDE(add_stack)
     84 
     85 //BEGIN_INCLUDE(fragment)
     86     public static class CountingFragment extends Fragment {
     87         int mNum;
     88 
     89         /**
     90          * Create a new instance of CountingFragment, providing "num"
     91          * as an argument.
     92          */
     93         static CountingFragment newInstance(int num) {
     94             CountingFragment f = new CountingFragment();
     95 
     96             // Supply num input as an argument.
     97             Bundle args = new Bundle();
     98             args.putInt("num", num);
     99             f.setArguments(args);
    100 
    101             return f;
    102         }
    103 
    104         /**
    105          * When creating, retrieve this instance's number from its arguments.
    106          */
    107         @Override
    108         public void onCreate(Bundle savedInstanceState) {
    109             super.onCreate(savedInstanceState);
    110             mNum = getArguments() != null ? getArguments().getInt("num") : 1;
    111         }
    112 
    113         /**
    114          * The Fragment's UI is just a simple text view showing its
    115          * instance number.
    116          */
    117         @Override
    118         public View onCreateView(LayoutInflater inflater, ViewGroup container,
    119                 Bundle savedInstanceState) {
    120             View v = inflater.inflate(R.layout.hello_world, container, false);
    121             View tv = v.findViewById(R.id.text);
    122             ((TextView)tv).setText("Fragment #" + mNum);
    123             tv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.gallery_thumb));
    124             return v;
    125         }
    126     }
    127 //END_INCLUDE(fragment)
    128 }
    129