I am trying to communicate between two android device. Its simple one as to act as server and other as
I am following wifiP2P https://developer.android.com/guide/topics/connectivity/wifip2p.html
I have three classes
package com.example.manojkumar.wifidirect;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WifiManager;
import android.net.wifi.WpsInfo;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pInfo;
import android.net.wifi.p2p.WifiP2pManager;
import android.nfc.Tag;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.net.wifi.p2p.WifiP2pManager.*;
import android.util.Log;
import android.widget.Toast;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements WifiP2pManager.ChannelListener {
private final IntentFilter intentFilter = new IntentFilter();
Channel channel;
WifiP2pManager manager;
BroadcastReceiverClass temp;
public List<WifiP2pDevice> peers = new ArrayList();
public static final String TAG = "Debugging";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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);
temp = new BroadcastReceiverClass(manager, channel, MainActivity.this);
registerReceiver(temp, intentFilter);
manager.discoverPeers(channel, new ActionListener() {
@Override
public void onSuccess() {
Log.d(TAG, "Success in discovering peers");
Toast.makeText(MainActivity.this, "Success DiscoverPeers ", Toast.LENGTH_LONG).show();
}
@Override
public void onFailure(int i) {
Log.d(TAG, "Failed to discover Peers " + i);
}
});
}
@Override
public void onResume() {
super.onResume();
registerReceiver(temp, intentFilter);
}
@Override
public void onPause() {
super.onPause();
unregisterReceiver(temp);
}
@Override
public void onChannelDisconnected() {
}
}
The second is is basically Broadcast receiver.
package com.example.manojkumar.wifidirect;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.WpsInfo;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pManager;
import android.util.Log;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Manoj Kumar on 1/1/2017.
*/
public class BroadcastReceiverClass extends BroadcastReceiver {
private WifiP2pManager wifiP2pManager;
private WifiP2pManager.Channel channel;
private Activity activity;
public List<WifiP2pDevice> peers = new ArrayList();
public BroadcastReceiverClass(WifiP2pManager wifiP2pManager, WifiP2pManager.Channel channel,
Activity activity){
this.wifiP2pManager = wifiP2pManager;
this.channel = channel;
this.activity = activity;
}
@Override
public void onReceive(final Context context, Intent intent) {
String action = intent.getAction();
Log.d(MainActivity.TAG, "ACTION "+action);
if(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)){
int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);
if(state == WifiP2pManager.WIFI_P2P_STATE_ENABLED){
Toast.makeText(context,"Wifi is enabled", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(context,"please enable your wifi", Toast.LENGTH_SHORT).show();
}
}
else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)){
Log.d("DISCOVERED", "WIFI_P2P_PEERS_CHANGED_ACTION");
if(wifiP2pManager !=null){
wifiP2pManager.requestPeers(channel, new WifiP2pManager.PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList wifiP2pDeviceList) {
peers.clear();
peers.addAll(wifiP2pDeviceList.getDeviceList());
if (peers.size() == 0) {
Log.d(MainActivity.TAG, "No Device Found to connect");
return;
} else {
for (int i = 0; i < peers.size(); i++) {
Log.d(MainActivity.TAG, "Devices are " + peers.get(i).toString());
}
WifiP2pDevice device = peers.get(0);
final WifiP2pConfig config = new WifiP2pConfig();
config.deviceAddress = device.deviceAddress;
config.wps.setup = WpsInfo.PBC;
wifiP2pManager.connect(channel, config, new WifiP2pManager.ActionListener() {
@Override
public void onSuccess() {
Log.d(MainActivity.TAG, "Connected -------------- Connected");
DataTrasnsferAysnc dataTrasnsferAysnc = new DataTrasnsferAysnc(activity);
dataTrasnsferAysnc.execute();
}
@Override
public void onFailure(int i) {
Log.d(MainActivity.TAG, "Connect failed. Retry. " + i);
Toast.makeText(activity, "Connect failed. Retry. " + i,
Toast.LENGTH_SHORT).show();
}
});
}
}
});
}
}
else if(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)){
}
else if(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)){
}
}
}
Third is the asynctask( still working on it)
package com.example.manojkumar.wifidirect;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
/**
* Created by Manoj Kumar on 1/1/2017.
*/
public class DataTrasnsferAysnc extends AsyncTask<Void, Void, Void> {
private Context context;
private String temp = "Manoj Kumar";
public DataTrasnsferAysnc(Context context){
Log.d(MainActivity.TAG, "DataTransferAsync");
this.context = context;
}
@Override
protected Void doInBackground(Void... param) {
try{
ServerSocket serverSocket = new ServerSocket(8888);
while(true) {
Socket client = serverSocket.accept();
Log.d(MainActivity.TAG, "Waiting.......");
InputStream inputStream = client.getInputStream();
serverSocket.close();
}
}
catch (IOException e) {
Log.d(MainActivity.TAG, "ServerSocket "+e);
return null;
}
}
}
The problem is I get following logs in loops
01-02 03:34:24.278 8483-8483/com.example.manojkumar.wifidirect D/Debugging: ACTION android.net.wifi.p2p.PEERS_CHANGED
01-02 03:34:24.278 8483-8483/com.example.manojkumar.wifidirect D/DISCOVERED: WIFI_P2P_PEERS_CHANGED_ACTION
01-02 03:34:24.278 8483-8483/com.example.manojkumar.wifidirect D/Debugging: Connected -------------- Connected
01-02 03:34:24.278 8483-8483/com.example.manojkumar.wifidirect D/Debugging: DataTransferAsync
01-02 03:34:24.281 8483-8483/com.example.manojkumar.wifidirect D/Debugging: Devices are Device: Android_fabe
deviceAddress: 52:2e:5c:e6:5e:e4
primary type: 10-0050F204-5
secondary type: null
wps: 392
grpcapab: 171
devcapab: 37
status: 1
wfdInfo: WFD enabled: falseWFD DeviceInfo: 0
WFD CtrlPort: 0
WFD MaxThroughput: 0
01-02 03:34:24.286 8483-8483/com.example.manojkumar.wifidirect D/Debugging: Connected -------------- Connected
01-02 03:34:24.286 8483-8483/com.example.manojkumar.wifidirect D/Debugging: DataTransferAsync
01-02 03:34:24.286 8483-8483/com.example.manojkumar.wifidirect D/Debugging: ACTION android.net.wifi.p2p.PEERS_CHANGED
01-02 03:34:24.286 8483-8483/com.example.manojkumar.wifidirect D/DISCOVERED: WIFI_P2P_PEERS_CHANGED_ACTION
01-02 03:34:24.288 8483-8483/com.example.manojkumar.wifidirect D/Debugging: Devices are Device: Android_fabe
deviceAddress: 52:2e:5c:e6:5e:e4
primary type: 10-0050F204-5
secondary type: null
wps: 392
grpcapab: 171
devcapab: 37
status: 1
wfdInfo: WFD enabled: falseWFD DeviceInfo: 0
WFD CtrlPort: 0
WFD MaxThroughput: 0
thought I have called
DataTrasnsferAysnc dataTrasnsferAysnc = new DataTrasnsferAysnc(activity);
dataTrasnsferAysnc.execute();
The control doesnt reach doInBackground() fucntion.
This can be fixed by calling "executeOnExecutor" instead of execute.
For more details please check here.
Hope this helps, Goodluck.