Java tutorial
// Copyright (c) 2014 Eugene Zhuk. // Use of this source code is governed by the MIT license that can be found // in the LICENSE file. package com.ezhuk.cast; import android.app.Fragment; import android.app.FragmentManager; import android.content.res.Configuration; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.MenuItemCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.MediaRouteActionProvider; import android.support.v7.media.MediaRouter; import android.support.v7.media.MediaRouter.RouteInfo; import android.support.v7.media.MediaRouteSelector; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.Toast; import com.google.android.gms.cast.Cast; 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; public class MainActivity extends ActionBarActivity { private static final String TAG = "MainActivity"; private ActionBarDrawerToggle mDrawerToggle; private DrawerLayout mDrawerLayout; private ListView mDrawerList; private HashMap<String, String> mRouteInfos; public ArrayList<String> mDeviceNames; private MediaRouter mMediaRouter; private MediaRouter.Callback mMediaRouterCallback; private MediaRouteSelector mMediaRouteSelector; private CastDevice mCastDevice; private GoogleApiClient mGoogleApiClient; private Cast.Listener mCastListener; private TextChannel mTextChannel; private boolean mApplicationStarted; private boolean mWaitingForReconnect; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mRouteInfos = new HashMap<String, String>(); mDeviceNames = new ArrayList<String>(); setupActionBar(); setupDrawer(); if (savedInstanceState == null) { selectDrawerItem(0); } mMediaRouter = MediaRouter.getInstance(getApplicationContext()); mMediaRouteSelector = new MediaRouteSelector.Builder().addControlCategory( CastMediaControlIntent.categoryForCast(getResources().getString(R.string.app_id))).build(); mMediaRouterCallback = new MediaRouterCallback(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); MenuItem mediaRouteItem = menu.findItem(R.id.media_route_item); MediaRouteActionProvider mediaRouteActionProvider = (MediaRouteActionProvider) MenuItemCompat .getActionProvider(mediaRouteItem); mediaRouteActionProvider.setRouteSelector(mMediaRouteSelector); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @Override protected void onResume() { super.onResume(); mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN); } @Override protected void onPause() { if (isFinishing()) { mMediaRouter.removeCallback(mMediaRouterCallback); } super.onPause(); } @Override protected void onDestroy() { doneCast(); super.onDestroy(); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggle. mDrawerToggle.onConfigurationChanged(newConfig); } public void onSendText(View view) { EditText editText = (EditText) findViewById(R.id.text); String text = editText.getText().toString(); if (!text.isEmpty()) { editText.setText(""); sendText(text); } else { Toast.makeText(MainActivity.this, "Enter text", Toast.LENGTH_SHORT).show(); } } private void setupActionBar() { getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setHomeButtonEnabled(true); } private void setupDrawer() { mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.drawer_list); mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_item, getResources().getStringArray(R.array.drawer_array))); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) { public void onDrawerClosed(View view) { invalidateOptionsMenu(); } public void onDrawerOpened(View view) { invalidateOptionsMenu(); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); } private void sendText(String text) { if (null != mGoogleApiClient && null != mTextChannel) { try { Cast.CastApi.sendMessage(mGoogleApiClient, mTextChannel.getNamespace(), text) .setResultCallback(new ResultCallback<Status>() { @Override public void onResult(Status status) { if (!status.isSuccess()) { Log.e(TAG, "sendText: could not send text"); } } }); } catch (Exception ex) { Log.e(TAG, "sendText: ", ex); } } else { Toast.makeText(MainActivity.this, text, Toast.LENGTH_SHORT).show(); } } private void initCast(Bundle bundle) { try { mCastDevice = CastDevice.getFromBundle(bundle); mCastListener = new CastListener(); Cast.CastOptions.Builder optionsBuilder = Cast.CastOptions.builder(mCastDevice, mCastListener); mGoogleApiClient = new GoogleApiClient.Builder(this).addApi(Cast.API, optionsBuilder.build()) .addConnectionCallbacks(new ConnectionCallbacks()) .addOnConnectionFailedListener(new ConnectionFailedListener()).build(); mGoogleApiClient.connect(); } catch (Exception ex) { Log.e(TAG, "initCast: ", ex); } } private void doneCast() { if (null != mGoogleApiClient) { if (mApplicationStarted) { try { Cast.CastApi.stopApplication(mGoogleApiClient); if (null != mTextChannel) { Cast.CastApi.removeMessageReceivedCallbacks(mGoogleApiClient, mTextChannel.getNamespace()); mTextChannel = null; } } catch (IOException ex) { Log.e(TAG, "doneCast: ", ex); } mApplicationStarted = false; } if (mGoogleApiClient.isConnected()) { mGoogleApiClient.disconnect(); } mGoogleApiClient = null; } mCastDevice = null; mWaitingForReconnect = false; } private void setChannel() { try { Cast.CastApi.setMessageReceivedCallbacks(mGoogleApiClient, mTextChannel.getNamespace(), mTextChannel); } catch (IOException ex) { Log.e(TAG, "setChannel: ", ex); } } private void updateDevicesFragment() { Fragment fragment = getFragmentManager().findFragmentById(R.id.drawer_frame); if (fragment.getClass() == DevicesFragment.class) { DevicesFragment devicesFragment = (DevicesFragment) fragment; mDeviceNames.clear(); mDeviceNames.addAll(mRouteInfos.values()); devicesFragment.updateDevicesList(); } } private class MediaRouterCallback extends MediaRouter.Callback { @Override public void onRouteAdded(MediaRouter router, RouteInfo info) { mRouteInfos.put(info.getId(), info.getName()); updateDevicesFragment(); } @Override public void onRouteRemoved(MediaRouter router, RouteInfo info) { mRouteInfos.remove(info.getId()); updateDevicesFragment(); } @Override public void onRouteSelected(MediaRouter router, RouteInfo info) { initCast(info.getExtras()); } @Override public void onRouteUnselected(MediaRouter router, RouteInfo info) { doneCast(); } } public class TextChannel implements MessageReceivedCallback { public String getNamespace() { return getString(R.string.namespace_id); } @Override public void onMessageReceived(CastDevice device, String namespace, String message) { Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show(); } } private class CastListener extends Cast.Listener { @Override public void onApplicationDisconnected(int errorCode) { doneCast(); } } private class ConnectionCallbacks implements GoogleApiClient.ConnectionCallbacks { @Override public void onConnected(Bundle connectionHint) { if (null == mGoogleApiClient) return; try { if (mWaitingForReconnect) { mWaitingForReconnect = false; if ((null != connectionHint) && connectionHint.getBoolean(Cast.EXTRA_APP_NO_LONGER_RUNNING)) { doneCast(); } else { setChannel(); } } else { Cast.CastApi.launchApplication(mGoogleApiClient, getString(R.string.app_id), false) .setResultCallback(new ResultCallback<Cast.ApplicationConnectionResult>() { @Override public void onResult(Cast.ApplicationConnectionResult result) { Status status = result.getStatus(); if (status.isSuccess()) { mApplicationStarted = true; mTextChannel = new TextChannel(); setChannel(); sendText(getResources().getString(R.string.app_name)); } else { doneCast(); } } }); } } catch (Exception ex) { Log.e(TAG, "onConnected: ", ex); } } @Override public void onConnectionSuspended(int cause) { mWaitingForReconnect = true; } } private class ConnectionFailedListener implements GoogleApiClient.OnConnectionFailedListener { @Override public void onConnectionFailed(ConnectionResult result) { doneCast(); } } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectDrawerItem(position); } } private void selectDrawerItem(int position) { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.drawer_frame, (0 == position) ? new DevicesFragment() : new TextFragment()).commit(); mDrawerList.setItemChecked(position, true); mDrawerLayout.closeDrawer(mDrawerList); } }