1/* 2 * Copyright (C) 2013 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.android.internal.app; 18 19import com.android.internal.R; 20 21import android.app.Dialog; 22import android.content.Context; 23import android.media.MediaRouter; 24import android.media.MediaRouter.RouteInfo; 25import android.os.Bundle; 26import android.text.TextUtils; 27import android.view.LayoutInflater; 28import android.view.View; 29import android.view.ViewGroup; 30import android.view.Window; 31import android.widget.AdapterView; 32import android.widget.ArrayAdapter; 33import android.widget.Button; 34import android.widget.ListView; 35import android.widget.TextView; 36 37import java.util.Comparator; 38 39/** 40 * This class implements the route chooser dialog for {@link MediaRouter}. 41 * <p> 42 * This dialog allows the user to choose a route that matches a given selector. 43 * </p> 44 * 45 * @see MediaRouteButton 46 * @see MediaRouteActionProvider 47 * 48 * TODO: Move this back into the API, as in the support library media router. 49 */ 50public class MediaRouteChooserDialog extends Dialog { 51 private final MediaRouter mRouter; 52 private final MediaRouterCallback mCallback; 53 54 private int mRouteTypes; 55 private View.OnClickListener mExtendedSettingsClickListener; 56 private RouteAdapter mAdapter; 57 private ListView mListView; 58 private Button mExtendedSettingsButton; 59 private boolean mAttachedToWindow; 60 61 public MediaRouteChooserDialog(Context context, int theme) { 62 super(context, theme); 63 64 mRouter = (MediaRouter) context.getSystemService(Context.MEDIA_ROUTER_SERVICE); 65 mCallback = new MediaRouterCallback(); 66 } 67 68 /** 69 * Gets the media route types for filtering the routes that the user can 70 * select using the media route chooser dialog. 71 * 72 * @return The route types. 73 */ 74 public int getRouteTypes() { 75 return mRouteTypes; 76 } 77 78 /** 79 * Sets the types of routes that will be shown in the media route chooser dialog 80 * launched by this button. 81 * 82 * @param types The route types to match. 83 */ 84 public void setRouteTypes(int types) { 85 if (mRouteTypes != types) { 86 mRouteTypes = types; 87 88 if (mAttachedToWindow) { 89 mRouter.removeCallback(mCallback); 90 mRouter.addCallback(types, mCallback, 91 MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN); 92 } 93 94 refreshRoutes(); 95 } 96 } 97 98 public void setExtendedSettingsClickListener(View.OnClickListener listener) { 99 if (listener != mExtendedSettingsClickListener) { 100 mExtendedSettingsClickListener = listener; 101 updateExtendedSettingsButton(); 102 } 103 } 104 105 /** 106 * Returns true if the route should be included in the list. 107 * <p> 108 * The default implementation returns true for enabled non-default routes that 109 * match the route types. Subclasses can override this method to filter routes 110 * differently. 111 * </p> 112 * 113 * @param route The route to consider, never null. 114 * @return True if the route should be included in the chooser dialog. 115 */ 116 public boolean onFilterRoute(MediaRouter.RouteInfo route) { 117 return !route.isDefault() && route.isEnabled() && route.matchesTypes(mRouteTypes); 118 } 119 120 @Override 121 protected void onCreate(Bundle savedInstanceState) { 122 super.onCreate(savedInstanceState); 123 124 getWindow().requestFeature(Window.FEATURE_LEFT_ICON); 125 126 setContentView(R.layout.media_route_chooser_dialog); 127 setTitle(mRouteTypes == MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY 128 ? R.string.media_route_chooser_title_for_remote_display 129 : R.string.media_route_chooser_title); 130 131 // Must be called after setContentView. 132 getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON, 133 R.drawable.ic_media_route_off_holo_dark); 134 135 mAdapter = new RouteAdapter(getContext()); 136 mListView = (ListView)findViewById(R.id.media_route_list); 137 mListView.setAdapter(mAdapter); 138 mListView.setOnItemClickListener(mAdapter); 139 mListView.setEmptyView(findViewById(android.R.id.empty)); 140 141 mExtendedSettingsButton = (Button)findViewById(R.id.media_route_extended_settings_button); 142 updateExtendedSettingsButton(); 143 } 144 145 private void updateExtendedSettingsButton() { 146 if (mExtendedSettingsButton != null) { 147 mExtendedSettingsButton.setOnClickListener(mExtendedSettingsClickListener); 148 mExtendedSettingsButton.setVisibility( 149 mExtendedSettingsClickListener != null ? View.VISIBLE : View.GONE); 150 } 151 } 152 153 @Override 154 public void onAttachedToWindow() { 155 super.onAttachedToWindow(); 156 157 mAttachedToWindow = true; 158 mRouter.addCallback(mRouteTypes, mCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN); 159 refreshRoutes(); 160 } 161 162 @Override 163 public void onDetachedFromWindow() { 164 mAttachedToWindow = false; 165 mRouter.removeCallback(mCallback); 166 167 super.onDetachedFromWindow(); 168 } 169 170 /** 171 * Refreshes the list of routes that are shown in the chooser dialog. 172 */ 173 public void refreshRoutes() { 174 if (mAttachedToWindow) { 175 mAdapter.update(); 176 } 177 } 178 179 private final class RouteAdapter extends ArrayAdapter<MediaRouter.RouteInfo> 180 implements ListView.OnItemClickListener { 181 private final LayoutInflater mInflater; 182 183 public RouteAdapter(Context context) { 184 super(context, 0); 185 mInflater = LayoutInflater.from(context); 186 } 187 188 public void update() { 189 clear(); 190 final int count = mRouter.getRouteCount(); 191 for (int i = 0; i < count; i++) { 192 MediaRouter.RouteInfo route = mRouter.getRouteAt(i); 193 if (onFilterRoute(route)) { 194 add(route); 195 } 196 } 197 sort(RouteComparator.sInstance); 198 notifyDataSetChanged(); 199 } 200 201 @Override 202 public boolean areAllItemsEnabled() { 203 return false; 204 } 205 206 @Override 207 public boolean isEnabled(int position) { 208 return getItem(position).isEnabled(); 209 } 210 211 @Override 212 public View getView(int position, View convertView, ViewGroup parent) { 213 View view = convertView; 214 if (view == null) { 215 view = mInflater.inflate(R.layout.media_route_list_item, parent, false); 216 } 217 MediaRouter.RouteInfo route = getItem(position); 218 TextView text1 = (TextView)view.findViewById(android.R.id.text1); 219 TextView text2 = (TextView)view.findViewById(android.R.id.text2); 220 text1.setText(route.getName()); 221 CharSequence description = route.getDescription(); 222 if (TextUtils.isEmpty(description)) { 223 text2.setVisibility(View.GONE); 224 text2.setText(""); 225 } else { 226 text2.setVisibility(View.VISIBLE); 227 text2.setText(description); 228 } 229 view.setEnabled(route.isEnabled()); 230 return view; 231 } 232 233 @Override 234 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 235 MediaRouter.RouteInfo route = getItem(position); 236 if (route.isEnabled()) { 237 route.select(); 238 dismiss(); 239 } 240 } 241 } 242 243 private final class MediaRouterCallback extends MediaRouter.SimpleCallback { 244 @Override 245 public void onRouteAdded(MediaRouter router, MediaRouter.RouteInfo info) { 246 refreshRoutes(); 247 } 248 249 @Override 250 public void onRouteRemoved(MediaRouter router, MediaRouter.RouteInfo info) { 251 refreshRoutes(); 252 } 253 254 @Override 255 public void onRouteChanged(MediaRouter router, MediaRouter.RouteInfo info) { 256 refreshRoutes(); 257 } 258 259 @Override 260 public void onRouteSelected(MediaRouter router, int type, RouteInfo info) { 261 dismiss(); 262 } 263 } 264 265 private static final class RouteComparator implements Comparator<MediaRouter.RouteInfo> { 266 public static final RouteComparator sInstance = new RouteComparator(); 267 268 @Override 269 public int compare(MediaRouter.RouteInfo lhs, MediaRouter.RouteInfo rhs) { 270 return lhs.getName().toString().compareTo(rhs.getName().toString()); 271 } 272 } 273} 274