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/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.basicmediarouter;
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import android.app.Activity;
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import android.app.MediaRouteActionProvider;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.media.MediaRouter;
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import android.media.MediaRouter.RouteInfo;
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import android.os.Bundle;
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import android.view.Display;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.WindowManager;
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import android.widget.Button;
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import android.widget.TextView;
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/**
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* <p>
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* This sample demonstrates the use of the MediaRouter API to show content on a
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* secondary display using a {@link android.app.Presentation}.
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* </p>
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* <p>
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* The activity uses the {@link android.media.MediaRouter} API to automatically detect when a
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* presentation display is available and to allow the user to control the media
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* routes using a menu item provided by the {@link android.app.MediaRouteActionProvider}.
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* When a presentation display is available a {@link android.app.Presentation} (implemented
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* as a {@link SamplePresentation}) is shown on the preferred display. A button
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* toggles the background color of the secondary screen to show the interaction
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* between the primary and secondary screens.
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* </p>
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* <p>
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* This sample requires an HDMI or Wifi display. Alternatively, the
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* "Simulate secondary displays" feature in Development Settings can be enabled
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* to simulate secondary displays.
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* </p>
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*
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* @see android.app.Presentation
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* @see android.media.MediaRouter
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*/
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public class MainActivity extends Activity {
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private MediaRouter mMediaRouter;
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// Active Presentation, set to null if no secondary screen is enabled
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private SamplePresentation mPresentation;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.sample_main);
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mTextStatus = (TextView) findViewById(R.id.textStatus);
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// get the list of background colors
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mColors = getResources().getIntArray(R.array.androidcolors);
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// Enable clicks on the 'change color' button
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mButton = (Button) findViewById(R.id.button1);
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mButton.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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showNextColor();
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}
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});
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// Get the MediaRouter service
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mMediaRouter = (MediaRouter) getSystemService(Context.MEDIA_ROUTER_SERVICE);
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}
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/**
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* Implementing a {@link android.media.MediaRouter.Callback} to update the displayed
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* {@link android.app.Presentation} when a route is selected, unselected or the
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* presentation display has changed. The provided stub implementation
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* {@link android.media.MediaRouter.SimpleCallback} is extended and only
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* {@link android.media.MediaRouter.SimpleCallback#onRouteSelected(android.media.MediaRouter, int, android.media.MediaRouter.RouteInfo)}
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* ,
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* {@link android.media.MediaRouter.SimpleCallback#onRouteUnselected(android.media.MediaRouter, int, android.media.MediaRouter.RouteInfo)}
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* and
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* {@link android.media.MediaRouter.SimpleCallback#onRoutePresentationDisplayChanged(android.media.MediaRouter, android.media.MediaRouter.RouteInfo)}
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* are overridden to update the displayed {@link android.app.Presentation} in
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* {@link #updatePresentation()}. These callbacks enable or disable the
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* second screen presentation based on the routing provided by the
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* {@link android.media.MediaRouter} for {@link android.media.MediaRouter#ROUTE_TYPE_LIVE_VIDEO}
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* streams. @
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*/
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private final MediaRouter.SimpleCallback mMediaRouterCallback =
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new MediaRouter.SimpleCallback() {
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/**
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* A new route has been selected as active. Disable the current
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* route and enable the new one.
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*/
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@Override
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public void onRouteSelected(MediaRouter router, int type, RouteInfo info) {
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updatePresentation();
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}
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/**
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* The route has been unselected.
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*/
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@Override
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public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
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updatePresentation();
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}
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/**
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* The route's presentation display has changed. This callback
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* is called when the presentation has been activated, removed
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* or its properties have changed.
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*/
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@Override
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public void onRoutePresentationDisplayChanged(MediaRouter router, RouteInfo info) {
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updatePresentation();
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}
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};
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/**
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* Updates the displayed presentation to enable a secondary screen if it has
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* been selected in the {@link android.media.MediaRouter} for the
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* {@link android.media.MediaRouter#ROUTE_TYPE_LIVE_VIDEO} type. If no screen has been
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* selected by the {@link android.media.MediaRouter}, the current screen is disabled.
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* Otherwise a new {@link SamplePresentation} is initialized and shown on
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* the secondary screen.
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*/
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private void updatePresentation() {
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// Get the selected route for live video
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RouteInfo selectedRoute = mMediaRouter.getSelectedRoute(
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MediaRouter.ROUTE_TYPE_LIVE_VIDEO);
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// Get its Display if a valid route has been selected
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Display selectedDisplay = null;
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if (selectedRoute != null) {
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selectedDisplay = selectedRoute.getPresentationDisplay();
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}
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/*
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* Dismiss the current presentation if the display has changed or no new
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* route has been selected
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*/
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if (mPresentation != null && mPresentation.getDisplay() != selectedDisplay) {
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mPresentation.dismiss();
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mPresentation = null;
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mButton.setEnabled(false);
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mTextStatus.setText(R.string.secondary_notconnected);
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}
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/*
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* Show a new presentation if the previous one has been dismissed and a
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* route has been selected.
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*/
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if (mPresentation == null && selectedDisplay != null) {
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// Initialise a new Presentation for the Display
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mPresentation = new SamplePresentation(this, selectedDisplay);
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mPresentation.setOnDismissListener(mOnDismissListener);
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// Try to show the presentation, this might fail if the display has
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// gone away in the mean time
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try {
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mPresentation.show();
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mTextStatus.setText(getResources().getString(R.string.secondary_connected,
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selectedRoute.getName(MainActivity.this)));
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mButton.setEnabled(true);
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showNextColor();
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} catch (WindowManager.InvalidDisplayException ex) {
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// Couldn't show presentation - display was already removed
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mPresentation = null;
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}
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}
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}
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@Override
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protected void onResume() {
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super.onResume();
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// Register a callback for all events related to live video devices
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mMediaRouter.addCallback(MediaRouter.ROUTE_TYPE_LIVE_VIDEO, mMediaRouterCallback);
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// Show the 'Not connected' status message
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mButton.setEnabled(false);
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mTextStatus.setText(R.string.secondary_notconnected);
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// Update the displays based on the currently active routes
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updatePresentation();
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}
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@Override
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protected void onPause() {
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super.onPause();
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// Stop listening for changes to media routes.
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mMediaRouter.removeCallback(mMediaRouterCallback);
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}
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@Override
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protected void onStop() {
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super.onStop();
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// Dismiss the presentation when the activity is not visible.
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if (mPresentation != null) {
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mPresentation.dismiss();
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mPresentation = null;
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}
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}
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/**
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* Inflates the ActionBar or options menu. The menu file defines an item for
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* the {@link android.app.MediaRouteActionProvider}, which is registered here for all
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* live video devices using {@link android.media.MediaRouter#ROUTE_TYPE_LIVE_VIDEO}.
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*/
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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super.onCreateOptionsMenu(menu);
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getMenuInflater().inflate(R.menu.main, menu);
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// Configure the media router action provider
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MenuItem mediaRouteMenuItem = menu.findItem(R.id.menu_media_route);
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MediaRouteActionProvider mediaRouteActionProvider =
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(MediaRouteActionProvider) mediaRouteMenuItem.getActionProvider();
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mediaRouteActionProvider.setRouteTypes(MediaRouter.ROUTE_TYPE_LIVE_VIDEO);
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return true;
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}
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/**
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* Listens for dismissal of the {@link SamplePresentation} and removes its
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* reference.
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*/
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private final DialogInterface.OnDismissListener mOnDismissListener =
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new DialogInterface.OnDismissListener() {
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@Override
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public void onDismiss(DialogInterface dialog) {
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if (dialog == mPresentation) {
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mPresentation = null;
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}
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}
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};
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// Views used to display status information on the primary screen
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private TextView mTextStatus;
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private Button mButton;
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// selected color index
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private int mColor = 0;
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// background colors
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public int[] mColors;
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/**
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* Displays the next color on the secondary screen if it is activate.
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*/
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private void showNextColor() {
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if (mPresentation != null) {
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// a second screen is active and initialized, show the next color
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mPresentation.setColor(mColors[mColor]);
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mColor = (mColor + 1) % mColors.length;
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}
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}
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}