com.google.cast.sample.helloworld.MainActivity.java Source code

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Here is the source code for com.google.cast.sample.helloworld.MainActivity.java

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/*
 * 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.google.cast.sample.helloworld;

import java.io.IOException;
import java.util.ArrayList;

import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.speech.RecognizerIntent;
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.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

import com.google.cast.sample.helloworld.R;
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;

/**
 * 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;

    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;
    private String mSessionId;

    @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));

        // When the user clicks on the button, use Android voice recognition to
        // get text
        Button voiceButton = (Button) findViewById(R.id.voiceButton);
        voiceButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                startVoiceRecognitionActivity();
                //sendMessage("{\"key\": \"search\", \"value\": \"search google for apple\"}");
            }
        });

        // 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();
    }

    /**
     * Android voice recognition
     */
    private void startVoiceRecognitionActivity() {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, getString(R.string.message_to_cast));
        startActivityForResult(intent, REQUEST_CODE);
    }

    /*
     * Handle the voice recognition response
     * 
     * @see android.support.v4.app.FragmentActivity#onActivityResult(int, int,
     * android.content.Intent)
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
            ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            if (matches.size() > 0) {
                Log.d(TAG, matches.get(0));
                sendMessage("{\"key\": \"search\", \"value\": \"" + matches.get(0) + "\"}");
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    @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;
    }

    @Override
    public boolean onPrepareOptionsMenu(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;
    }

    /**
     * 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;
        }
    }

    /**
     * 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);
        }
    }

    /**
     * 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();
                                        mSessionId = result.getSessionId();
                                        String applicationStatus = result.getApplicationStatus();
                                        boolean wasLaunched = result.getWasLaunched();
                                        Log.d(TAG,
                                                "application name: " + applicationMetadata.getName() + ", status: "
                                                        + applicationStatus + ", sessionId: " + mSessionId
                                                        + ", 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);
                                        }

                                        // set the initial instructions
                                        // on the receiver
                                        sendMessage("{\"key\": \"text\", \"value\": \""
                                                + getString(R.string.instructions) + "\"}");
                                    } 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();
        }
    }

    /**
     * Tear down the connection to the receiver
     */
    private void teardown() {
        Log.d(TAG, "teardown");
        if (mApiClient != null) {
            if (mApplicationStarted) {
                if (mApiClient.isConnected()) {
                    try {
                        Cast.CastApi.stopApplication(mApiClient, mSessionId);
                        if (mHelloWorldChannel != null) {
                            Cast.CastApi.removeMessageReceivedCallbacks(mApiClient,
                                    mHelloWorldChannel.getNamespace());
                            mHelloWorldChannel = null;
                        }
                    } catch (IOException e) {
                        Log.e(TAG, "Exception while removing channel", e);
                    }
                    mApiClient.disconnect();
                }
                mApplicationStarted = false;
            }
            mApiClient = null;
        }
        mSelectedDevice = null;
        mWaitingForReconnect = false;
        mSessionId = null;
    }

    /**
     * Send a text message to the receiver
     * 
     * @param message
     */
    private void sendMessage(String 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");
                                }
                            }
                        });
            } catch (Exception e) {
                Log.e(TAG, "Exception while sending message", e);
            }
        } else {
            Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * 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);
        }

    }

}