1 /*
2  * Copyright 2018 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 androidx.mediarouter.app;
18 
19 import android.app.Dialog;
20 import android.content.Context;
21 import android.content.res.Configuration;
22 import android.os.Bundle;
23 
24 import androidx.fragment.app.DialogFragment;
25 import androidx.mediarouter.media.MediaRouteSelector;
26 
27 /**
28  * Media route chooser dialog fragment.
29  * <p>
30  * Creates a {@link MediaRouteChooserDialog}.  The application may subclass
31  * this dialog fragment to customize the media route chooser dialog.
32  * </p>
33  */
34 public class MediaRouteChooserDialogFragment extends DialogFragment {
35     private static final String ARGUMENT_SELECTOR = "selector";
36 
37     private MediaRouteChooserDialog mDialog;
38     private MediaRouteSelector mSelector;
39 
40     /**
41      * Creates a media route chooser dialog fragment.
42      * <p>
43      * All subclasses of this class must also possess a default constructor.
44      * </p>
45      */
MediaRouteChooserDialogFragment()46     public MediaRouteChooserDialogFragment() {
47         setCancelable(true);
48     }
49 
50     /**
51      * Gets the media route selector for filtering the routes that the user can select.
52      *
53      * @return The selector, never null.
54      */
getRouteSelector()55     public MediaRouteSelector getRouteSelector() {
56         ensureRouteSelector();
57         return mSelector;
58     }
59 
ensureRouteSelector()60     private void ensureRouteSelector() {
61         if (mSelector == null) {
62             Bundle args = getArguments();
63             if (args != null) {
64                 mSelector = MediaRouteSelector.fromBundle(args.getBundle(ARGUMENT_SELECTOR));
65             }
66             if (mSelector == null) {
67                 mSelector = MediaRouteSelector.EMPTY;
68             }
69         }
70     }
71 
72     /**
73      * Sets the media route selector for filtering the routes that the user can select.
74      * This method must be called before the fragment is added.
75      *
76      * @param selector The selector to set.
77      */
setRouteSelector(MediaRouteSelector selector)78     public void setRouteSelector(MediaRouteSelector selector) {
79         if (selector == null) {
80             throw new IllegalArgumentException("selector must not be null");
81         }
82 
83         ensureRouteSelector();
84         if (!mSelector.equals(selector)) {
85             mSelector = selector;
86 
87             Bundle args = getArguments();
88             if (args == null) {
89                 args = new Bundle();
90             }
91             args.putBundle(ARGUMENT_SELECTOR, selector.asBundle());
92             setArguments(args);
93 
94             MediaRouteChooserDialog dialog = (MediaRouteChooserDialog)getDialog();
95             if (dialog != null) {
96                 dialog.setRouteSelector(selector);
97             }
98         }
99     }
100 
101     /**
102      * Called when the chooser dialog is being created.
103      * <p>
104      * Subclasses may override this method to customize the dialog.
105      * </p>
106      */
onCreateChooserDialog( Context context, Bundle savedInstanceState)107     public MediaRouteChooserDialog onCreateChooserDialog(
108             Context context, Bundle savedInstanceState) {
109         return new MediaRouteChooserDialog(context);
110     }
111 
112     @Override
onCreateDialog(Bundle savedInstanceState)113     public Dialog onCreateDialog(Bundle savedInstanceState) {
114         mDialog = onCreateChooserDialog(getContext(), savedInstanceState);
115         mDialog.setRouteSelector(getRouteSelector());
116         return mDialog;
117     }
118 
119     @Override
onConfigurationChanged(Configuration newConfig)120     public void onConfigurationChanged(Configuration newConfig) {
121         super.onConfigurationChanged(newConfig);
122         if (mDialog != null) {
123             mDialog.updateLayout();
124         }
125     }
126 }
127