我有2部手机,并且两者都打开了wifi。我正在尝试wifi代码。但是WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)没有被调用。粘贴了代码。我想扫描附近所有开启wifi的设备。
public class WiFiDirectBroadcastReceiver extends BroadcastReceiver {
private WifiP2pManager mManager;
private WifiP2pManager.Channel mChannel;
private WifiScanActivity mActivity;
private WifiP2pManager.PeerListListener myPeerListListener;
private Context mContxt;
public WiFiDirectBroadcastReceiver(WifiP2pManager manager, WifiP2pManager.Channel channel,
WifiScanActivity activity) {
super();
this.mManager = manager;
this.mChannel = channel;
this.mActivity = activity;
this.mContxt = mActivity.getApplicationContext();
Toast.makeText(mContxt, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", Toast.LENGTH_SHORT).show();
}
@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
// request available peers from the wifi p2p manager. This is an
// asynchronous call and the calling activity is notified with a
// callback on PeerListListener.onPeersAvailable()
Toast.makeText(mContxt, "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB", Toast.LENGTH_SHORT).show();
WifiP2pDeviceList list = intent.getParcelableExtra(WifiP2pManager.EXTRA_P2P_DEVICE_LIST);
for (WifiP2pDevice d : list.getDeviceList()) { //...
Toast.makeText(mContxt, d.deviceAddress, Toast.LENGTH_SHORT).show();
}
} else if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(action)) {
// Respond to new connection or disconnections
Toast.makeText(mContxt, "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC", Toast.LENGTH_SHORT).show();
String acton = intent.getAction();
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
} else {
// Wi-Fi P2P is not enabled
}
}
} else if (WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION.equals(action)) {
// Respond to this device's wifi state changing
Toast.makeText(mContxt, "TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT", Toast.LENGTH_SHORT).show();
if (mManager != null) {
mManager.requestPeers(mChannel,myPeerListListener);// new WifiP2pManager.PeerListListener() {
/* @Override
public void onPeersAvailable(WifiP2pDeviceList peers) {
Log.d(TAG,String.format("PeerListListener: %d peers available, updating device list", peers.getDeviceList().size()));
Toast.makeText(mContxt, peers.getDeviceList().size(), Toast.LENGTH_SHORT).show();
Toast.makeText(mContxt, "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB", Toast.LENGTH_SHORT).show();
// DO WHATEVER YOU WANT HERE
// YOU CAN GET ACCESS TO ALL THE DEVICES YOU FOUND FROM peers OBJECT
}
});*/
}
}
}
}
public class WifiScanActivity extends AppCompatActivity {
WifiP2pManager mManager;
WifiP2pManager.Channel mChannel;
BroadcastReceiver mReceiver;
IntentFilter mIntentFilter;
Context mCntxt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mCntxt = this.getApplicationContext();
mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
mChannel = mManager.initialize(this, getMainLooper(), null);
mReceiver = new WiFiDirectBroadcastReceiver(mManager, mChannel, this);
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
mManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {
@Override
public void onSuccess() {
Toast.makeText(mCntxt, "SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS", Toast.LENGTH_SHORT).show();
}
@Override
public void onFailure(int reasonCode) {
Toast.makeText(mCntxt, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", Toast.LENGTH_SHORT).show();
}
});
}
/* register the broadcast receiver with the intent values to be matched */
@Override
protected void onResume() {
super.onResume();
registerReceiver(mReceiver, mIntentFilter);
}
/* unregister the broadcast receiver */
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
}
它打印“ CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC”,“ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA”,“ SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS”,但不打印“ BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB”
答案 0 :(得分:0)
尝试在您的应用中添加android.permission.ACCESS_COARSE_LOCATION