1
최근에 나는 다음과 같은 단계를 따른다. Developer.Android.ComWi-Fi (Android API)를 통해 다른 기기를 찾는 방법을 해결 하시겠습니까?
그러나 나는 거기에서 약간의 운이있는 것처럼 보인다. 근처에있는 동료를 찾으려고 시도했습니다. 을 arraylist에 넣었으나 운이없는 것 같습니다. 나는 아무것도 얻지 않았다.
내 실제 2 개 기기는 실제로 Android 4.1 및 4.2입니다. Wifi Direct는 API 레벨 14를 기반으로하므로 android 4.0 이상이므로 내 실제 기기는 문제가 아닌 것 같습니다.
내가 사용하는 개념은 이며 1 개의 활동과 1 개의 BroadCast Receiver를 사용합니다.
내 코드를 확인하십시오. 잘못 입력했거나 잊어 버렸습니까?
Chat1Activity.java
package com.example.androtut;
import java.util.ArrayList;
import others.MyBroadcastReceiver;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class Chat1Activity extends Activity {
private final IntentFilter mintentFilter = new IntentFilter();
private Channel mChannel;
private WifiP2pManager mManager;
private BroadcastReceiver mReceiver;
private ArrayList peers = new ArrayList();
private PeerListListener myPeerListListener = new PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList peerList) {
// Out with the old, in with the new.
peers.clear();
peers.addAll(peerList.getDeviceList());
// If an AdapterView is backed by this data, notify it
// of the change. For instance, if you have a ListView of available
// peers, trigger an update.
if (peers.size() == 0) {
Toast.makeText(getApplicationContext(),"Nothing found!", Toast.LENGTH_LONG).show();
return;
} else {
Toast.makeText(getApplicationContext(),"We've found " + peers.size() + " users", Toast.LENGTH_LONG).show();
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat1);
//Toast.makeText(getApplicationContext(), "Wifi is okay", Toast.LENGTH_LONG).show();
prepareIntentFilter();
Button btn_startchat = (Button) findViewById(R.id.btn_startchat);
// Listening to News Feed button click
btn_startchat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Launching News Feed Screen
detectPeers();
}
});
mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
mChannel = mManager.initialize(this, getMainLooper(), null);
}
private void detectPeers(){
mManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {
@Override
public void onSuccess() {
// Code for when the discovery initiation is successful goes here.
// No services have actually been discovered yet, so this method
// can often be left blank. Code for peer discovery goes in the
// onReceive method, detailed below.
}
@Override
public void onFailure(int reasonCode) {
// Code for when the discovery initiation fails goes here.
// Alert the user that something went wrong.
}
});
}
@Override
protected void onResume() {
super.onResume();
mReceiver = new MyBroadcastReceiver(mManager, mChannel, this, myPeerListListener);
registerReceiver(mReceiver, mintentFilter);
}
/* unregister the broadcast receiver */
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
private void prepareIntentFilter() {
mintentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
// Indicates a change in the list of available peers.
mintentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
// Indicates the state of Wi-Fi P2P connectivity has changed.
mintentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
// Indicates this device's details have changed.
mintentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
}
}
그리고
package others;
import java.util.ArrayList;
import com.example.androtut.Chat1Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.widget.Toast;
public class MyBroadcastReceiver extends BroadcastReceiver {
private WifiP2pManager mManager;
private Channel mChannel;
private Chat1Activity mActivity;
private PeerListListener myPeerListListener;
public MyBroadcastReceiver(WifiP2pManager manager, Channel channel,
Chat1Activity activity, PeerListListener obPeerList) {
super();
this.mManager = manager;
this.mChannel = channel;
this.mActivity = activity;
this.myPeerListListener = obPeerList;
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) {
// Check to see if Wi-Fi is enabled and notify appropriate activity
} else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
// Call WifiP2pManager.requestPeers() to get a list of current peers
if (mManager != null) {
mManager.requestPeers(mChannel, myPeerListListener);
}
} else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION
.equals(action)) {
// Respond to new connection or disconnections
} else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION
.equals(action)) {
// Respond to this device's wifi state changing
}
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) {
// Wifi P2P is enabled
Toast.makeText(mActivity.getApplicationContext(),"Wifi is okay", Toast.LENGTH_LONG).show();
} else {
// Wi-Fi P2P is not enabled
Toast.makeText(mActivity.getApplicationContext(),
"Wifi is not okay", Toast.LENGTH_LONG).show();
}
}
}
}
안드로이드 폴더에 wifi 직접 데모가 있습니다.이 폴더로 이동할 수 있습니다 ..samples/android-14/WiFiDirectDemo – Hardik4560
제안 사항 @ Hardik4560에 감사하지만 위 코드를 확인할 수 있습니까? – gumuruh