FragmentDialogSupport.java revision f27b1ffc67228d73326ec3426fef4c9db75cd6fd 
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
17package com.example.android.supportv4.app;
18
19import com.example.android.supportv4.R;
20
21import android.support.v4.app.DialogFragment;
22import android.support.v4.app.Fragment;
23import android.support.v4.app.FragmentActivity;
24import android.support.v4.app.FragmentTransaction;
25
26import android.os.Bundle;
27import android.view.LayoutInflater;
28import android.view.View;
29import android.view.View.OnClickListener;
30import android.view.ViewGroup;
31import android.widget.Button;
32import android.widget.TextView;
33
34public 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            @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
63    public void onSaveInstanceState(Bundle outState) {
64        super.onSaveInstanceState(outState);
65        outState.putInt("level", mStackLevel);
66    }
67
68//BEGIN_INCLUDE(add_dialog)
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
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         */
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
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
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