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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.DialogFragment;
     22 import android.support.v4.app.Fragment;
     23 import android.support.v4.app.FragmentActivity;
     24 import android.support.v4.app.FragmentTransaction;
     25 
     26 import android.os.Bundle;
     27 import android.view.LayoutInflater;
     28 import android.view.View;
     29 import android.view.View.OnClickListener;
     30 import android.view.ViewGroup;
     31 import android.widget.Button;
     32 import android.widget.TextView;
     33 
     34 public class FragmentDialogSupport extends FragmentActivity {
     35     int mStackLevel = 0;
     36 
     37     @Override
     38     protected void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40         setContentView(R.layout.fragment_dialog);
     41 
     42         View tv = findViewById(R.id.text);
     43         ((TextView)tv).setText("Example of displaying dialogs with a DialogFragment.  "
     44                 + "Press the show button below to see the first dialog; pressing "
     45                 + "successive show buttons will display other dialog styles as a "
     46                 + "stack, with dismissing or back going to the previous dialog.");
     47 
     48         // Watch for button clicks.
     49         Button button = (Button)findViewById(R.id.show);
     50         button.setOnClickListener(new OnClickListener() {
     51             public void onClick(View v) {
     52                 showDialog();
     53             }
     54         });
     55 
     56         if (savedInstanceState != null) {
     57             mStackLevel = savedInstanceState.getInt("level");
     58         }
     59     }
     60 
     61     @Override
     62     public void onSaveInstanceState(Bundle outState) {
     63         super.onSaveInstanceState(outState);
     64         outState.putInt("level", mStackLevel);
     65     }
     66 
     67 //BEGIN_INCLUDE(add_dialog)
     68     void showDialog() {
     69         mStackLevel++;
     70 
     71         // DialogFragment.show() will take care of adding the fragment
     72         // in a transaction.  We also want to remove any currently showing
     73         // dialog, so make our own transaction and take care of that here.
     74         FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
     75         Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
     76         if (prev != null) {
     77             ft.remove(prev);
     78         }
     79         ft.addToBackStack(null);
     80 
     81         // Create and show the dialog.
     82         DialogFragment newFragment = MyDialogFragment.newInstance(mStackLevel);
     83         newFragment.show(ft, "dialog");
     84     }
     85 //END_INCLUDE(add_dialog)
     86 
     87     static String getNameForNum(int num) {
     88         switch ((num-1)%6) {
     89             case 1: return "STYLE_NO_TITLE";
     90             case 2: return "STYLE_NO_FRAME";
     91             case 3: return "STYLE_NO_INPUT (this window can't receive input, so "
     92                     + "you will need to press the bottom show button)";
     93             case 4: return "STYLE_NORMAL with dark fullscreen theme";
     94             case 5: return "STYLE_NORMAL with light theme";
     95             case 6: return "STYLE_NO_TITLE with light theme";
     96             case 7: return "STYLE_NO_FRAME with light theme";
     97             case 8: return "STYLE_NORMAL with light fullscreen theme";
     98         }
     99         return "STYLE_NORMAL";
    100     }
    101 
    102 //BEGIN_INCLUDE(dialog)
    103     public static class MyDialogFragment extends DialogFragment {
    104         int mNum;
    105 
    106         /**
    107          * Create a new instance of MyDialogFragment, providing "num"
    108          * as an argument.
    109          */
    110         static MyDialogFragment newInstance(int num) {
    111             MyDialogFragment f = new MyDialogFragment();
    112 
    113             // Supply num input as an argument.
    114             Bundle args = new Bundle();
    115             args.putInt("num", num);
    116             f.setArguments(args);
    117 
    118             return f;
    119         }
    120 
    121         @Override
    122         public void onCreate(Bundle savedInstanceState) {
    123             super.onCreate(savedInstanceState);
    124             mNum = getArguments().getInt("num");
    125 
    126             // Pick a style based on the num.
    127             int style = DialogFragment.STYLE_NORMAL, theme = 0;
    128             switch ((mNum-1)%6) {
    129                 case 1: style = DialogFragment.STYLE_NO_TITLE; break;
    130                 case 2: style = DialogFragment.STYLE_NO_FRAME; break;
    131                 case 3: style = DialogFragment.STYLE_NO_INPUT; break;
    132                 case 4: style = DialogFragment.STYLE_NORMAL; break;
    133                 case 5: style = DialogFragment.STYLE_NO_TITLE; break;
    134                 case 6: style = DialogFragment.STYLE_NO_FRAME; break;
    135                 case 7: style = DialogFragment.STYLE_NORMAL; break;
    136             }
    137             switch ((mNum-1)%6) {
    138                 case 2: theme = android.R.style.Theme_Panel; break;
    139                 case 4: theme = android.R.style.Theme; break;
    140                 case 5: theme = android.R.style.Theme_Light; break;
    141                 case 6: theme = android.R.style.Theme_Light_Panel; break;
    142                 case 7: theme = android.R.style.Theme_Light; break;
    143             }
    144             setStyle(style, theme);
    145         }
    146 
    147         @Override
    148         public View onCreateView(LayoutInflater inflater, ViewGroup container,
    149                 Bundle savedInstanceState) {
    150             View v = inflater.inflate(R.layout.fragment_dialog, container, false);
    151             View tv = v.findViewById(R.id.text);
    152             ((TextView)tv).setText("Dialog #" + mNum + ": using style "
    153                     + getNameForNum(mNum));
    154 
    155             // Watch for button clicks.
    156             Button button = (Button)v.findViewById(R.id.show);
    157             button.setOnClickListener(new OnClickListener() {
    158                 public void onClick(View v) {
    159                     // When button is clicked, call up to owning activity.
    160                     ((FragmentDialogSupport)getActivity()).showDialog();
    161                 }
    162             });
    163 
    164             return v;
    165         }
    166     }
    167 //END_INCLUDE(dialog)
    168 }
    169