Java tutorial
/* * Copyright 2015 Synced Synapse. 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 org.xbmc.kore.ui.sections.hosts; import android.app.Activity; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.wifi.WifiManager; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.text.Html; import android.text.method.LinkMovementMethod; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.GridView; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; import org.xbmc.kore.R; import org.xbmc.kore.host.HostInfo; import org.xbmc.kore.jsonrpc.HostConnection; import org.xbmc.kore.utils.LogUtils; import org.xbmc.kore.utils.NetUtils; import java.io.IOException; import java.net.InetAddress; import javax.jmdns.JmDNS; import javax.jmdns.ServiceInfo; import butterknife.ButterKnife; import butterknife.InjectView; /** * Fragment that searchs foor XBMCs using Zeroconf */ public class AddHostFragmentZeroconf extends Fragment { private static final String TAG = LogUtils.makeLogTag(AddHostFragmentZeroconf.class); // See http://sourceforge.net/p/xbmc/mailman/message/28667703/ // _xbmc-jsonrpc-http._tcp // _xbmc-jsonrpc-h._tcp // _xbmc-jsonrpc-tcp._tcp // _xbmc-jsonrpc._tcp private static final String MDNS_XBMC_SERVICENAME = "_xbmc-jsonrpc-h._tcp.local."; private static final int DISCOVERY_TIMEOUT = 5000; /** * Callback interface to communicate with the enclosing activity */ public interface AddHostZeroconfListener { public void onAddHostZeroconfNoHost(); public void onAddHostZeroconfFoundHost(HostInfo hostInfo); } private AddHostZeroconfListener listener; @InjectView(R.id.search_host_title) TextView titleTextView; @InjectView(R.id.search_host_message) TextView messageTextView; @InjectView(R.id.next) Button nextButton; @InjectView(R.id.previous) Button previousButton; @InjectView(R.id.progress_bar) ProgressBar progressBar; @InjectView(R.id.list) GridView hostListGridView; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View root = inflater.inflate(R.layout.fragment_add_host_zeroconf, container, false); ButterKnife.inject(this, root); return root; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); if (getView() == null) return; // Launch discovery thread startSearching(); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { listener = (AddHostZeroconfListener) activity; } catch (ClassCastException e) { throw new ClassCastException( activity.toString() + " must implement AddHostZeroconfListener interface."); } } // Whether the user cancelled the search private boolean searchCancelled = false; private final Object lock = new Object(); /** * Starts the service discovery, setting up the UI accordingly */ public void startSearching() { if (!isNetworkConnected()) { noNetworkConnection(); return; } LogUtils.LOGD(TAG, "Starting service discovery..."); searchCancelled = false; final Handler handler = new Handler(); final Thread searchThread = new Thread(new Runnable() { @Override public void run() { WifiManager wifiManager = (WifiManager) getActivity().getApplicationContext() .getSystemService(Context.WIFI_SERVICE); WifiManager.MulticastLock multicastLock = null; try { // Get wifi ip address int wifiIpAddress = wifiManager.getConnectionInfo().getIpAddress(); InetAddress wifiInetAddress = NetUtils.intToInetAddress(wifiIpAddress); // Acquire multicast lock multicastLock = wifiManager.createMulticastLock("kore2.multicastlock"); multicastLock.setReferenceCounted(false); multicastLock.acquire(); JmDNS jmDns = (wifiInetAddress != null) ? JmDNS.create(wifiInetAddress) : JmDNS.create(); // Get the json rpc service list final ServiceInfo[] serviceInfos = jmDns.list(MDNS_XBMC_SERVICENAME, DISCOVERY_TIMEOUT); synchronized (lock) { // If the user didn't cancel the search, and we are sill in the activity if (!searchCancelled && isAdded()) { handler.post(new Runnable() { @Override public void run() { if ((serviceInfos == null) || (serviceInfos.length == 0)) { noHostFound(); } else { foundHosts(serviceInfos); } } }); } } } catch (IOException e) { LogUtils.LOGD(TAG, "Got an IO Exception", e); } finally { if (multicastLock != null) multicastLock.release(); } } }); titleTextView.setText(R.string.searching); messageTextView.setText(Html.fromHtml(getString(R.string.wizard_search_message))); messageTextView.setMovementMethod(LinkMovementMethod.getInstance()); progressBar.setVisibility(View.VISIBLE); hostListGridView.setVisibility(View.GONE); // Setup buttons nextButton.setVisibility(View.INVISIBLE); previousButton.setVisibility(View.VISIBLE); previousButton.setText(android.R.string.cancel); previousButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { synchronized (lock) { searchCancelled = true; noHostFound(); } } }); searchThread.start(); } /** * No host was found, present messages and buttons */ public void noHostFound() { if (!isAdded()) return; titleTextView.setText(R.string.no_xbmc_found); messageTextView.setText(Html.fromHtml(getString(R.string.wizard_search_no_host_found))); messageTextView.setMovementMethod(LinkMovementMethod.getInstance()); progressBar.setVisibility(View.GONE); hostListGridView.setVisibility(View.GONE); nextButton.setVisibility(View.VISIBLE); nextButton.setText(R.string.next); nextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { listener.onAddHostZeroconfNoHost(); } }); previousButton.setVisibility(View.VISIBLE); previousButton.setText(R.string.search_again); previousButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startSearching(); } }); } /** * Found hosts, present them * @param serviceInfos Service infos found */ public void foundHosts(final ServiceInfo[] serviceInfos) { if (!isAdded()) return; LogUtils.LOGD(TAG, "Found hosts: " + serviceInfos.length); titleTextView.setText(R.string.xbmc_found); messageTextView.setText(Html.fromHtml(getString(R.string.wizard_search_host_found))); messageTextView.setMovementMethod(LinkMovementMethod.getInstance()); nextButton.setVisibility(View.VISIBLE); nextButton.setText(R.string.next); nextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { listener.onAddHostZeroconfNoHost(); } }); previousButton.setVisibility(View.VISIBLE); previousButton.setText(R.string.search_again); previousButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startSearching(); } }); progressBar.setVisibility(View.GONE); hostListGridView.setVisibility(View.VISIBLE); HostListAdapter adapter = new HostListAdapter(getActivity(), R.layout.grid_item_host, serviceInfos); hostListGridView.setAdapter(adapter); hostListGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long itemId) { ServiceInfo selectedServiceInfo = serviceInfos[position]; String[] addresses = selectedServiceInfo.getHostAddresses(); if (addresses.length == 0) { // Couldn't get any address Toast.makeText(getActivity(), R.string.wizard_zeroconf_cant_connect_no_host_address, Toast.LENGTH_LONG).show(); return; } String hostName = selectedServiceInfo.getName(); String hostAddress = addresses[0]; int hostHttpPort = selectedServiceInfo.getPort(); HostInfo selectedHostInfo = new HostInfo(hostName, hostAddress, HostConnection.PROTOCOL_TCP, hostHttpPort, HostInfo.DEFAULT_TCP_PORT, null, null, true, HostInfo.DEFAULT_EVENT_SERVER_PORT, false); listener.onAddHostZeroconfFoundHost(selectedHostInfo); } }); } private void noNetworkConnection() { titleTextView.setText(R.string.no_network_connection); messageTextView.setText(Html.fromHtml(getString(R.string.wizard_search_no_network_connection))); messageTextView.setMovementMethod(LinkMovementMethod.getInstance()); progressBar.setVisibility(View.GONE); hostListGridView.setVisibility(View.GONE); nextButton.setVisibility(View.GONE); previousButton.setVisibility(View.VISIBLE); previousButton.setText(R.string.search_again); previousButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startSearching(); } }); } private boolean isNetworkConnected() { ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); return activeNetwork != null && activeNetwork.isConnectedOrConnecting(); } /** * Adapter used to show the hosts in the {@link GridView} */ private class HostListAdapter extends ArrayAdapter<ServiceInfo> { public HostListAdapter(Context context, int resource, ServiceInfo[] objects) { super(context, resource, objects); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = LayoutInflater.from(getActivity()).inflate(R.layout.grid_item_host, parent, false); } final ServiceInfo item = this.getItem(position); ((TextView) convertView.findViewById(R.id.host_name)).setText(item.getName()); String[] addresses = item.getHostAddresses(); String hostAddress; if (addresses.length > 0) { hostAddress = addresses[0] + ":" + item.getPort(); } else { hostAddress = getString(R.string.wizard_zeroconf_no_host_address); } ((TextView) convertView.findViewById(R.id.host_address)).setText(hostAddress); ImageView statusIndicator = (ImageView) convertView.findViewById(R.id.status_indicator); int statusColor = getActivity().getResources().getColor(R.color.host_status_available); statusIndicator.setColorFilter(statusColor); // Remove context menu ImageView contextMenu = (ImageView) convertView.findViewById(R.id.list_context_menu); contextMenu.setVisibility(View.GONE); return convertView; } } }