| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.support.v4.media.routing; |
| |
| import android.content.Context; |
| import android.hardware.display.DisplayManager; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.util.Log; |
| import android.view.Display; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| class MediaRouterJellybeanMr1 extends MediaRouterJellybean { |
| private static final String TAG = "MediaRouterJellybeanMr1"; |
| |
| public static Object createCallback(Callback callback) { |
| return new CallbackProxy<Callback>(callback); |
| } |
| |
| public static final class RouteInfo { |
| public static boolean isEnabled(Object routeObj) { |
| return ((android.media.MediaRouter.RouteInfo)routeObj).isEnabled(); |
| } |
| |
| public static Display getPresentationDisplay(Object routeObj) { |
| return ((android.media.MediaRouter.RouteInfo)routeObj).getPresentationDisplay(); |
| } |
| } |
| |
| public static interface Callback extends MediaRouterJellybean.Callback { |
| public void onRoutePresentationDisplayChanged(Object routeObj); |
| } |
| |
| /** |
| * Workaround the fact that the version of MediaRouter.addCallback() that accepts a |
| * flag to perform an active scan does not exist in JB MR1 so we need to force |
| * wifi display scans directly through the DisplayManager. |
| * Do not use on JB MR2 and above. |
| */ |
| public static final class ActiveScanWorkaround implements Runnable { |
| // Time between wifi display scans when actively scanning in milliseconds. |
| private static final int WIFI_DISPLAY_SCAN_INTERVAL = 15000; |
| |
| private final DisplayManager mDisplayManager; |
| private final Handler mHandler; |
| private Method mScanWifiDisplaysMethod; |
| |
| private boolean mActivelyScanningWifiDisplays; |
| |
| public ActiveScanWorkaround(Context context, Handler handler) { |
| if (Build.VERSION.SDK_INT != 17) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| mDisplayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE); |
| mHandler = handler; |
| try { |
| mScanWifiDisplaysMethod = DisplayManager.class.getMethod("scanWifiDisplays"); |
| } catch (NoSuchMethodException ex) { |
| } |
| } |
| |
| public void setActiveScanRouteTypes(int routeTypes) { |
| // On JB MR1, there is no API to scan wifi display routes. |
| // Instead we must make a direct call into the DisplayManager to scan |
| // wifi displays on this version but only when live video routes are requested. |
| // See also the JellybeanMr2Impl implementation of this method. |
| // This was fixed in JB MR2 by adding a new overload of addCallback() to |
| // enable active scanning on request. |
| if ((routeTypes & MediaRouterJellybean.ROUTE_TYPE_LIVE_VIDEO) != 0) { |
| if (!mActivelyScanningWifiDisplays) { |
| if (mScanWifiDisplaysMethod != null) { |
| mActivelyScanningWifiDisplays = true; |
| mHandler.post(this); |
| } else { |
| Log.w(TAG, "Cannot scan for wifi displays because the " |
| + "DisplayManager.scanWifiDisplays() method is " |
| + "not available on this device."); |
| } |
| } |
| } else { |
| if (mActivelyScanningWifiDisplays) { |
| mActivelyScanningWifiDisplays = false; |
| mHandler.removeCallbacks(this); |
| } |
| } |
| } |
| |
| @Override |
| public void run() { |
| if (mActivelyScanningWifiDisplays) { |
| try { |
| mScanWifiDisplaysMethod.invoke(mDisplayManager); |
| } catch (IllegalAccessException ex) { |
| Log.w(TAG, "Cannot scan for wifi displays.", ex); |
| } catch (InvocationTargetException ex) { |
| Log.w(TAG, "Cannot scan for wifi displays.", ex); |
| } |
| mHandler.postDelayed(this, WIFI_DISPLAY_SCAN_INTERVAL); |
| } |
| } |
| } |
| |
| /** |
| * Workaround the fact that the isConnecting() method does not exist in JB MR1. |
| * Do not use on JB MR2 and above. |
| */ |
| public static final class IsConnectingWorkaround { |
| private Method mGetStatusCodeMethod; |
| private int mStatusConnecting; |
| |
| public IsConnectingWorkaround() { |
| if (Build.VERSION.SDK_INT != 17) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| try { |
| Field statusConnectingField = |
| android.media.MediaRouter.RouteInfo.class.getField("STATUS_CONNECTING"); |
| mStatusConnecting = statusConnectingField.getInt(null); |
| mGetStatusCodeMethod = |
| android.media.MediaRouter.RouteInfo.class.getMethod("getStatusCode"); |
| } catch (NoSuchFieldException ex) { |
| } catch (NoSuchMethodException ex) { |
| } catch (IllegalAccessException ex) { |
| } |
| } |
| |
| public boolean isConnecting(Object routeObj) { |
| android.media.MediaRouter.RouteInfo route = |
| (android.media.MediaRouter.RouteInfo)routeObj; |
| |
| if (mGetStatusCodeMethod != null) { |
| try { |
| int statusCode = (Integer)mGetStatusCodeMethod.invoke(route); |
| return statusCode == mStatusConnecting; |
| } catch (IllegalAccessException ex) { |
| } catch (InvocationTargetException ex) { |
| } |
| } |
| |
| // Assume not connecting. |
| return false; |
| } |
| } |
| |
| static class CallbackProxy<T extends Callback> |
| extends MediaRouterJellybean.CallbackProxy<T> { |
| public CallbackProxy(T callback) { |
| super(callback); |
| } |
| |
| @Override |
| public void onRoutePresentationDisplayChanged(android.media.MediaRouter router, |
| android.media.MediaRouter.RouteInfo route) { |
| mCallback.onRoutePresentationDisplayChanged(route); |
| } |
| } |
| } |