MediaRouteActionProvider.java revision b35c445f34e1a18e17aef3e3dfbc1c39b4d1815c 
1/*
2 * Copyright (C) 2012 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 android.app;
18
19import android.content.Context;
20import android.media.MediaRouter;
21import android.media.MediaRouter.RouteInfo;
22import android.util.Log;
23import android.view.ActionProvider;
24import android.view.MenuItem;
25import android.view.View;
26
27public class MediaRouteActionProvider extends ActionProvider {
28    private static final String TAG = "MediaRouteActionProvider";
29
30    private Context mContext;
31    private MediaRouter mRouter;
32    private MenuItem mMenuItem;
33    private MediaRouteButton mView;
34    private int mRouteTypes;
35    private final RouterCallback mRouterCallback = new RouterCallback();
36    private View.OnClickListener mExtendedSettingsListener;
37
38    public MediaRouteActionProvider(Context context) {
39        super(context);
40        mContext = context;
41        mRouter = (MediaRouter) context.getSystemService(Context.MEDIA_ROUTER_SERVICE);
42
43        // Start with live audio by default.
44        // TODO Update this when new route types are added; segment by API level
45        // when different route types were added.
46        setRouteTypes(MediaRouter.ROUTE_TYPE_LIVE_AUDIO);
47    }
48
49    public void setRouteTypes(int types) {
50        if (types == mRouteTypes) {
51            // Already registered; nothing to do.
52            return;
53        }
54        if (mRouteTypes != 0) {
55            mRouter.removeCallback(mRouterCallback);
56        }
57        mRouteTypes = types;
58        if (mView != null) {
59            mView.setRouteTypes(mRouteTypes);
60        }
61        mRouter.addCallback(types, mRouterCallback);
62    }
63
64    @Override
65    public View onCreateActionView() {
66        throw new UnsupportedOperationException("Use onCreateActionView(MenuItem) instead.");
67    }
68
69    @Override
70    public View onCreateActionView(MenuItem item) {
71        if (mMenuItem != null || mView != null) {
72            Log.e(TAG, "onCreateActionView: this ActionProvider is already associated " +
73                    "with a menu item. Don't reuse MediaRouteActionProvider instances! " +
74                    "Abandoning the old one...");
75        }
76        mMenuItem = item;
77        mView = new MediaRouteButton(mContext);
78        mMenuItem.setVisible(mRouter.getRouteCount() > 1);
79        mView.setRouteTypes(mRouteTypes);
80        mView.setExtendedSettingsClickListener(mExtendedSettingsListener);
81        return mView;
82    }
83
84    @Override
85    public boolean onPerformDefaultAction() {
86        // Show routing dialog
87        return true;
88    }
89
90    public void setExtendedSettingsClickListener(View.OnClickListener listener) {
91        mExtendedSettingsListener = listener;
92        if (mView != null) {
93            mView.setExtendedSettingsClickListener(listener);
94        }
95    }
96
97    private class RouterCallback extends MediaRouter.SimpleCallback {
98        @Override
99        public void onRouteAdded(MediaRouter router, RouteInfo info) {
100            mMenuItem.setVisible(mRouter.getRouteCount() > 1);
101        }
102
103        @Override
104        public void onRouteRemoved(MediaRouter router, RouteInfo info) {
105            mMenuItem.setVisible(mRouter.getRouteCount() > 1);
106        }
107    }
108}
109