Java tutorial
/* * Copyright (C) 2014 Google Inc. All Rights Reserved. * * 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 com.tony.casthelloworld; import android.graphics.drawable.ColorDrawable; import android.os.Bundle; import android.support.v4.view.MenuItemCompat; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.MediaRouteActionProvider; import android.support.v7.media.MediaRouteSelector; import android.support.v7.media.MediaRouter; import android.support.v7.media.MediaRouter.RouteInfo; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.cast.ApplicationMetadata; import com.google.android.gms.cast.Cast; import com.google.android.gms.cast.Cast.ApplicationConnectionResult; import com.google.android.gms.cast.Cast.MessageReceivedCallback; import com.google.android.gms.cast.CastDevice; import com.google.android.gms.cast.CastMediaControlIntent; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.common.api.ResultCallback; import com.google.android.gms.common.api.Status; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.seveneyes.deck.Card; import org.seveneyes.deck.Deck; import java.io.IOException; /** * Main activity to send messages to the receiver. */ public class MainActivity extends ActionBarActivity { private static final String TAG = MainActivity.class.getSimpleName(); private static final int REQUEST_CODE = 1; final private String CARD_HIDDEN_TEXT = "Card Hidden"; TextView remainingCards = null; TextView currentCard = null; private MediaRouter mMediaRouter; private MediaRouteSelector mMediaRouteSelector; private MediaRouter.Callback mMediaRouterCallback; private CastDevice mSelectedDevice; private GoogleApiClient mApiClient; private Cast.Listener mCastListener; private ConnectionCallbacks mConnectionCallbacks; private ConnectionFailedListener mConnectionFailedListener; private HelloWorldChannel mHelloWorldChannel; private boolean mApplicationStarted; private boolean mWaitingForReconnect; //Deck private Deck deck; //Deck of Drawn Cards private Deck deckDrawn; //Buttons private Button startGame; private Button nextCard; private Button showCard; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ActionBar actionBar = getSupportActionBar(); actionBar.setBackgroundDrawable(new ColorDrawable(android.R.color.transparent)); //Current Card Text currentCard = (TextView) findViewById(R.id.currentCard); //Remaining Cards Text remainingCards = (TextView) findViewById(R.id.cardsRemaining); //Start/Reset Game Button startGame = (Button) findViewById(R.id.startGame); startGame.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { initializeGame(); updateCast(); } }); //Next Card Button nextCard = (Button) findViewById(R.id.nextCard); nextCard.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //pop the card off //Update the current card getNextCard(); updateCast(); } }); //Show Card Button showCard = (Button) findViewById(R.id.showCard); showCard.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: //Make the card visible if (deck.peek() != null) { currentCard.setText(prettyPrintCard(deck.peek())); } else { currentCard.setText("No more Cards!"); } return true; case MotionEvent.ACTION_UP: // No longer down if (deck.peek() != null) { currentCard.setText(CARD_HIDDEN_TEXT); } else { currentCard.setText("No more Cards!"); } return true; } return false; } }); // Configure Cast device discovery mMediaRouter = MediaRouter.getInstance(getApplicationContext()); mMediaRouteSelector = new MediaRouteSelector.Builder().addControlCategory( CastMediaControlIntent.categoryForCast(getResources().getString(R.string.app_id))).build(); mMediaRouterCallback = new MyMediaRouterCallback(); } /** * Initialize the Game */ private void initializeGame() { //New deck to draw from deck = new Deck(); deck.initializeDeck(); deck.shuffle(); //Drawn cards holder deckDrawn = new Deck(); //Initialize UI stuff currentCard.setText(CARD_HIDDEN_TEXT); updateTotalCards(); } private void getNextCard() { if (deck != null && deck.size() > 0) { //pop card off deckDrawn.addCard(deck.drawCard()); //Update total cards updateTotalCards(); } } /** * Prints the Card as a string * * @param card object * @return String of the cards rank and suit */ private String prettyPrintCard(Card card) { String text = ""; if (card != null) { text = card.getNumber().getName() + " of " + card.getSuit().getName(); } return text; } /** * Updates the total cards left on call */ private void updateTotalCards() { if (deck != null) { remainingCards.setText(deck.size() + " / " + deck.getDeckMax()); } } /** * Generate Payload */ private String generatePayload() { JSONObject payload = new JSONObject(); try { if (deckDrawn != null && deck != null) { //Current Card payload.put("current", generateCardJSON(deck.peek())); //Drawn Cards JSONArray drawnArray = new JSONArray(); for (Card c : deckDrawn.getValues()) { drawnArray.put(generateCardJSON(c)); } payload.put("drawn", drawnArray); } } catch (JSONException e) { e.printStackTrace(); } return payload.toString(); } /** * Creates the JSONObject to the receiver * * @param c Card object * @return JSONObject of the current and drawn cards */ private JSONObject generateCardJSON(Card c) { String rank = ""; String rankString = ""; String suit = ""; String suitString = ""; if (c != null) { rank = c.getNumber().getRank(); rankString = c.getNumber().getName(); suit = c.getSuit().getRank(); suitString = c.getSuit().getName(); } JSONObject cardJSON = new JSONObject(); try { cardJSON.put("rank", rank); cardJSON.put("rankString", rankString); cardJSON.put("suit", suit); cardJSON.put("suitString", suitString); } catch (JSONException e) { e.printStackTrace(); } return cardJSON; } /** * Send JSONObject to Cast. * Drawn and Current Card */ private void updateCast() { sendMessage(generatePayload()); } @Override protected void onResume() { super.onResume(); // Start media router discovery mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN); } @Override protected void onPause() { if (isFinishing()) { // End media router discovery mMediaRouter.removeCallback(mMediaRouterCallback); } super.onPause(); } @Override public void onDestroy() { teardown(); super.onDestroy(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.main, menu); MenuItem mediaRouteMenuItem = menu.findItem(R.id.media_route_menu_item); MediaRouteActionProvider mediaRouteActionProvider = (MediaRouteActionProvider) MenuItemCompat .getActionProvider(mediaRouteMenuItem); // Set the MediaRouteActionProvider selector for device discovery. mediaRouteActionProvider.setRouteSelector(mMediaRouteSelector); return true; } /** * Start the receiver app */ private void launchReceiver() { try { mCastListener = new Cast.Listener() { @Override public void onApplicationDisconnected(int errorCode) { Log.d(TAG, "application has stopped"); teardown(); } }; // Connect to Google Play services mConnectionCallbacks = new ConnectionCallbacks(); mConnectionFailedListener = new ConnectionFailedListener(); Cast.CastOptions.Builder apiOptionsBuilder = Cast.CastOptions.builder(mSelectedDevice, mCastListener); mApiClient = new GoogleApiClient.Builder(this).addApi(Cast.API, apiOptionsBuilder.build()) .addConnectionCallbacks(mConnectionCallbacks) .addOnConnectionFailedListener(mConnectionFailedListener).build(); mApiClient.connect(); } catch (Exception e) { Log.e(TAG, "Failed launchReceiver", e); } } /** * Tear down the connection to the receiver */ private void teardown() { if (mApiClient != null) { if (mApplicationStarted) { try { Cast.CastApi.stopApplication(mApiClient); if (mHelloWorldChannel != null) { Cast.CastApi.removeMessageReceivedCallbacks(mApiClient, mHelloWorldChannel.getNamespace()); mHelloWorldChannel = null; } } catch (IOException e) { Log.e(TAG, "Exception while removing channel", e); } mApplicationStarted = false; } if (mApiClient.isConnected()) { mApiClient.disconnect(); } mApiClient = null; } mSelectedDevice = null; mWaitingForReconnect = false; } /** * Send a text message to the receiver * * @param message */ private void sendMessage(String message) { Log.e(TAG, "sendMessage()"); Log.e(TAG, message); if (mApiClient != null && mHelloWorldChannel != null) { try { Cast.CastApi.sendMessage(mApiClient, mHelloWorldChannel.getNamespace(), message) .setResultCallback(new ResultCallback<Status>() { @Override public void onResult(Status result) { if (!result.isSuccess()) { Log.e(TAG, "Sending message failed"); } else { Log.e(TAG, "Sending message success!"); } } }); } catch (Exception e) { Log.e(TAG, "Exception while sending message", e); } } else { Toast.makeText(MainActivity.this, "Not Connected", Toast.LENGTH_SHORT).show(); } } /** * Callback for MediaRouter events */ private class MyMediaRouterCallback extends MediaRouter.Callback { @Override public void onRouteSelected(MediaRouter router, RouteInfo info) { Log.d(TAG, "onRouteSelected"); // Handle the user route selection. mSelectedDevice = CastDevice.getFromBundle(info.getExtras()); launchReceiver(); } @Override public void onRouteUnselected(MediaRouter router, RouteInfo info) { Log.d(TAG, "onRouteUnselected: info=" + info); teardown(); mSelectedDevice = null; } } /** * Google Play services callbacks */ private class ConnectionCallbacks implements GoogleApiClient.ConnectionCallbacks { @Override public void onConnected(Bundle connectionHint) { Log.d(TAG, "onConnected"); if (mApiClient == null) { // We got disconnected while this runnable was pending // execution. return; } try { if (mWaitingForReconnect) { mWaitingForReconnect = false; // Check if the receiver app is still running if ((connectionHint != null) && connectionHint.getBoolean(Cast.EXTRA_APP_NO_LONGER_RUNNING)) { Log.d(TAG, "App is no longer running"); teardown(); } else { // Re-create the custom message channel try { Cast.CastApi.setMessageReceivedCallbacks(mApiClient, mHelloWorldChannel.getNamespace(), mHelloWorldChannel); } catch (IOException e) { Log.e(TAG, "Exception while creating channel", e); } } } else { // Launch the receiver app Cast.CastApi.launchApplication(mApiClient, getString(R.string.app_id), false) .setResultCallback(new ResultCallback<Cast.ApplicationConnectionResult>() { @Override public void onResult(ApplicationConnectionResult result) { Status status = result.getStatus(); Log.d(TAG, "ApplicationConnectionResultCallback.onResult: statusCode " + status.getStatusCode()); if (status.isSuccess()) { ApplicationMetadata applicationMetadata = result.getApplicationMetadata(); String sessionId = result.getSessionId(); String applicationStatus = result.getApplicationStatus(); boolean wasLaunched = result.getWasLaunched(); Log.d(TAG, "application name: " + applicationMetadata.getName() + ", status: " + applicationStatus + ", sessionId: " + sessionId + ", wasLaunched: " + wasLaunched); mApplicationStarted = true; // Create the custom message // channel mHelloWorldChannel = new HelloWorldChannel(); try { Cast.CastApi.setMessageReceivedCallbacks(mApiClient, mHelloWorldChannel.getNamespace(), mHelloWorldChannel); } catch (IOException e) { Log.e(TAG, "Exception while creating channel", e); } Log.e(TAG, "Application Launched!"); if (deckDrawn != null && deck != null) { sendMessage(generatePayload().toString()); } } else { Log.e(TAG, "application could not launch"); teardown(); } } }); } } catch (Exception e) { Log.e(TAG, "Failed to launch application", e); } } @Override public void onConnectionSuspended(int cause) { Log.d(TAG, "onConnectionSuspended"); mWaitingForReconnect = true; } } /** * Google Play services callbacks */ private class ConnectionFailedListener implements GoogleApiClient.OnConnectionFailedListener { @Override public void onConnectionFailed(ConnectionResult result) { Log.e(TAG, "onConnectionFailed "); teardown(); } } /** * Custom message channel */ class HelloWorldChannel implements MessageReceivedCallback { /** * @return custom namespace */ public String getNamespace() { return getString(R.string.namespace); } /* * Receive message from the receiver app */ @Override public void onMessageReceived(CastDevice castDevice, String namespace, String message) { Log.d(TAG, "onMessageReceived: " + message); } } }