Java tutorial
/* * Copyright (C) 2011 The Android Open Source Project * * 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.example.locationproject.wifidirect; import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.p2p.WifiP2pConfig; import android.net.wifi.p2p.WifiP2pDevice; import android.net.wifi.p2p.WifiP2pManager; import android.net.wifi.p2p.WifiP2pManager.ActionListener; import android.net.wifi.p2p.WifiP2pManager.Channel; import android.net.wifi.p2p.WifiP2pManager.ChannelListener; import android.os.Bundle; import android.os.Environment; import android.provider.Settings; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.Toast; import com.example.locationproject.R; import com.example.locationproject.services.FileLocator; import com.example.locationproject.wifidirect.DeviceListFragment.DeviceActionListener; /** * An activity that uses WiFi Direct APIs to discover and connect with available * devices. WiFi Direct APIs are asynchronous and rely on callback mechanism * using interfaces to notify the application of operation success or failure. * The application should also register a BroadcastReceiver for notification of * WiFi state related events. */ public class WiFiDirectActivity extends Activity implements ChannelListener, DeviceActionListener { public static final String TAG = "wifidirectdemo"; private WifiP2pManager manager; private boolean isWifiP2pEnabled = false; private boolean retryChannel = false; private final IntentFilter intentFilter = new IntentFilter(); private Channel channel; private BroadcastReceiver receiver = null; /** * @param isWifiP2pEnabled the isWifiP2pEnabled to set */ public void setIsWifiP2pEnabled(boolean isWifiP2pEnabled) { this.isWifiP2pEnabled = isWifiP2pEnabled; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // add necessary intent values to be matched. intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION); intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION); intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION); intentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION); manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE); channel = manager.initialize(this, getMainLooper(), null); Log.d(TAG, "Deleting healthplus folder at slave"); File f = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() + "/location"); if (f.exists()) { try { FileUtils.deleteDirectory(f); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else { Log.d("WifiDirectActivity", "downloads folder for slave is empty"); } Log.d("WifiDirectACtivity", "calling FileLocatoe service"); Intent i = new Intent(this, FileLocator.class); // Add extras to the bundle //i.putExtra("foo", "bar"); // Start the service startService(i); } /** register the BroadcastReceiver with the intent values to be matched */ @Override public void onResume() { super.onResume(); receiver = new WiFiDirectBroadcastReceiver(manager, channel, this); registerReceiver(receiver, intentFilter); } @Override public void onPause() { super.onPause(); unregisterReceiver(receiver); } /** * Remove all peers and clear all fields. This is called on * BroadcastReceiver receiving a state change event. */ public void resetData() { DeviceListFragment fragmentList = (DeviceListFragment) getFragmentManager() .findFragmentById(R.id.frag_list); DeviceDetailFragment fragmentDetails = (DeviceDetailFragment) getFragmentManager() .findFragmentById(R.id.frag_detail); if (fragmentList != null) { fragmentList.clearPeers(); } if (fragmentDetails != null) { fragmentDetails.resetViews(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.action_items, menu); return true; } /* * (non-Javadoc) * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) */ @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.atn_direct_enable: if (manager != null && channel != null) { // Since this is the system wireless settings activity, it's // not going to send us a result. We will be notified by // WiFiDeviceBroadcastReceiver instead. startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS)); } else { Log.e(TAG, "channel or manager is null"); } return true; case R.id.atn_direct_discover: if (!isWifiP2pEnabled) { Toast.makeText(WiFiDirectActivity.this, R.string.p2p_off_warning, Toast.LENGTH_SHORT).show(); return true; } final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager() .findFragmentById(R.id.frag_list); fragment.onInitiateDiscovery(); manager.discoverPeers(channel, new WifiP2pManager.ActionListener() { @Override public void onSuccess() { Toast.makeText(WiFiDirectActivity.this, "Discovery Initiated", Toast.LENGTH_SHORT).show(); } @Override public void onFailure(int reasonCode) { Toast.makeText(WiFiDirectActivity.this, "Discovery Failed : " + reasonCode, Toast.LENGTH_SHORT) .show(); } }); return true; default: return super.onOptionsItemSelected(item); } } @Override public void showDetails(WifiP2pDevice device) { DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager() .findFragmentById(R.id.frag_detail); fragment.showDetails(device); } @Override public void connect(WifiP2pConfig config) { manager.connect(channel, config, new ActionListener() { @Override public void onSuccess() { // WiFiDirectBroadcastReceiver will notify us. Ignore for now. } @Override public void onFailure(int reason) { Toast.makeText(WiFiDirectActivity.this, "Connect failed. Retry.", Toast.LENGTH_SHORT).show(); } }); } @Override public void disconnect() { final DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager() .findFragmentById(R.id.frag_detail); fragment.resetViews(); manager.removeGroup(channel, new ActionListener() { @Override public void onFailure(int reasonCode) { Log.d(TAG, "Disconnect failed. Reason :" + reasonCode); } @Override public void onSuccess() { fragment.getView().setVisibility(View.GONE); } }); } @Override public void onChannelDisconnected() { // we will try once more if (manager != null && !retryChannel) { Toast.makeText(this, "Channel lost. Trying again", Toast.LENGTH_LONG).show(); resetData(); retryChannel = true; manager.initialize(this, getMainLooper(), this); } else { Toast.makeText(this, "Severe! Channel is probably lost premanently. Try Disable/Re-Enable P2P.", Toast.LENGTH_LONG).show(); } } @Override public void cancelDisconnect() { /* * A cancel abort request by user. Disconnect i.e. removeGroup if * already connected. Else, request WifiP2pManager to abort the ongoing * request */ if (manager != null) { final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager() .findFragmentById(R.id.frag_list); if (fragment.getDevice() == null || fragment.getDevice().status == WifiP2pDevice.CONNECTED) { disconnect(); } else if (fragment.getDevice().status == WifiP2pDevice.AVAILABLE || fragment.getDevice().status == WifiP2pDevice.INVITED) { manager.cancelConnect(channel, new ActionListener() { @Override public void onSuccess() { Toast.makeText(WiFiDirectActivity.this, "Aborting connection", Toast.LENGTH_SHORT).show(); } @Override public void onFailure(int reasonCode) { Toast.makeText(WiFiDirectActivity.this, "Connect abort request failed. Reason Code: " + reasonCode, Toast.LENGTH_SHORT) .show(); } }); } } } }