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 android.os.Bundle;
20 import android.view.LayoutInflater;
21 import android.view.View;
22 import android.view.View.OnClickListener;
23 import android.view.ViewGroup;
24 import android.widget.Button;
25 import android.widget.TextView;
26 
27 import androidx.fragment.app.DialogFragment;
28 import androidx.fragment.app.Fragment;
29 import androidx.fragment.app.FragmentActivity;
30 import androidx.fragment.app.FragmentTransaction;
31 
32 import com.example.android.supportv4.R;
33 
34 public class FragmentDialogSupport extends FragmentActivity {
35     int mStackLevel = 0;
36 
37     @Override
onCreate(Bundle savedInstanceState)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             @Override
52             public void onClick(View v) {
53                 showDialog();
54             }
55         });
56 
57         if (savedInstanceState != null) {
58             mStackLevel = savedInstanceState.getInt("level");
59         }
60     }
61 
62     @Override
onSaveInstanceState(Bundle outState)63     public void onSaveInstanceState(Bundle outState) {
64         super.onSaveInstanceState(outState);
65         outState.putInt("level", mStackLevel);
66     }
67 
68 //BEGIN_INCLUDE(add_dialog)
showDialog()69     void showDialog() {
70         mStackLevel++;
71 
72         // DialogFragment.show() will take care of adding the fragment
73         // in a transaction.  We also want to remove any currently showing
74         // dialog, so make our own transaction and take care of that here.
75         FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
76         Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog");
77         if (prev != null) {
78             ft.remove(prev);
79         }
80         ft.addToBackStack(null);
81 
82         // Create and show the dialog.
83         DialogFragment newFragment = MyDialogFragment.newInstance(mStackLevel);
84         newFragment.show(ft, "dialog");
85     }
86 //END_INCLUDE(add_dialog)
87 
getNameForNum(int num)88     static String getNameForNum(int num) {
89         switch ((num-1)%6) {
90             case 1: return "STYLE_NO_TITLE";
91             case 2: return "STYLE_NO_FRAME";
92             case 3: return "STYLE_NO_INPUT (this window can't receive input, so "
93                     + "you will need to press the bottom show button)";
94             case 4: return "STYLE_NORMAL with dark fullscreen theme";
95             case 5: return "STYLE_NORMAL with light theme";
96             case 6: return "STYLE_NO_TITLE with light theme";
97             case 7: return "STYLE_NO_FRAME with light theme";
98             case 8: return "STYLE_NORMAL with light fullscreen theme";
99         }
100         return "STYLE_NORMAL";
101     }
102 
103 //BEGIN_INCLUDE(dialog)
104     public static class MyDialogFragment extends DialogFragment {
105         int mNum;
106 
107         /**
108          * Create a new instance of MyDialogFragment, providing "num"
109          * as an argument.
110          */
newInstance(int num)111         static MyDialogFragment newInstance(int num) {
112             MyDialogFragment f = new MyDialogFragment();
113 
114             // Supply num input as an argument.
115             Bundle args = new Bundle();
116             args.putInt("num", num);
117             f.setArguments(args);
118 
119             return f;
120         }
121 
122         @Override
onCreate(Bundle savedInstanceState)123         public void onCreate(Bundle savedInstanceState) {
124             super.onCreate(savedInstanceState);
125             mNum = getArguments().getInt("num");
126 
127             // Pick a style based on the num.
128             int style = DialogFragment.STYLE_NORMAL, theme = 0;
129             switch ((mNum-1)%6) {
130                 case 1: style = DialogFragment.STYLE_NO_TITLE; break;
131                 case 2: style = DialogFragment.STYLE_NO_FRAME; break;
132                 case 3: style = DialogFragment.STYLE_NO_INPUT; break;
133                 case 4: style = DialogFragment.STYLE_NORMAL; break;
134                 case 5: style = DialogFragment.STYLE_NO_TITLE; break;
135                 case 6: style = DialogFragment.STYLE_NO_FRAME; break;
136                 case 7: style = DialogFragment.STYLE_NORMAL; break;
137             }
138             switch ((mNum-1)%6) {
139                 case 2: theme = android.R.style.Theme_Panel; break;
140                 case 4: theme = android.R.style.Theme; break;
141                 case 5: theme = android.R.style.Theme_Light; break;
142                 case 6: theme = android.R.style.Theme_Light_Panel; break;
143                 case 7: theme = android.R.style.Theme_Light; break;
144             }
145             setStyle(style, theme);
146         }
147 
148         @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)149         public View onCreateView(LayoutInflater inflater, ViewGroup container,
150                 Bundle savedInstanceState) {
151             View v = inflater.inflate(R.layout.fragment_dialog, container, false);
152             View tv = v.findViewById(R.id.text);
153             ((TextView)tv).setText("Dialog #" + mNum + ": using style "
154                     + getNameForNum(mNum));
155 
156             // Watch for button clicks.
157             Button button = (Button)v.findViewById(R.id.show);
158             button.setOnClickListener(new OnClickListener() {
159                 @Override
160                 public void onClick(View v) {
161                     // When button is clicked, call up to owning activity.
162                     ((FragmentDialogSupport)getActivity()).showDialog();
163                 }
164             });
165 
166             return v;
167         }
168     }
169 //END_INCLUDE(dialog)
170 }
171