我必须创建一个 WifiP2p 应用程序。该 Activity 有效，但我在 onPeersAvailable 中没有收到回调。我认为我的广播接收器有问题(我在 Logcat 中只能看到 2 个 Log.v，但它应该包含其他 Log.v...)
这是我的广播接收器代码
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.p2p.WifiP2pManager;
import android.util.Log;
public class WifiDirectBroadcastReceiver extends BroadcastReceiver {
private WifiP2pManager manager;
private Channel channel;
private Setting activity;
private PeerListListener myPeerListListener;
private static final String TAG = "MyActivity";
public WifiDirectBroadcastReceiver(WifiP2pManager manager, Channel channel, Setting activity){
super();
this.manager = manager;
this.channel = channel;
this.activity = activity;
}
@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
int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);
if (state == WifiP2pManager.WIFI_P2P_STATE_ENABLED) {
//TO BE COMPLETED
} else {
//TO BE COMPLETED
}
} else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
// Call WifiP2pManager.requestPeers() to get a list of current peers
if (manager != null) {
manager.requestPeers(channel, new WifiP2pManager.PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList arg0) {
// TODO Auto-generated method stub
Log.v(TAG,"Ici!!!!!!!!!!!!!!!!!!!!!");
// DO WHATEVER YOU WANT HERE
// YOU CAN GET ACCESS TO ALL THE DEVICES YOU FOUND FROM peers OBJECT
}
});
}
} 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
}
}
}
这是我的 Activity 代码( Activity 名为“设置”)
import java.util.ArrayList;
import java.util.Collection;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
public class Setting extends FragmentActivity {
private WifiDirectBroadcastReceiver mReceiver;
private WifiP2pManager mManager;
private Channel mChannel;
private IntentFilter mIntentFilter=new IntentFilter();
private static final String TAG = "MyActivity";
private Collection <WifiP2pDevice> peers;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
mChannel = mManager.initialize(this, getMainLooper(), null);
mReceiver = new WifiDirectBroadcastReceiver(mManager, mChannel, this);
final Button btnScan = (Button)findViewById(R.id.btnScan);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
Log.v(TAG,"Le wifi est activé");
registerReceiver(mReceiver, mIntentFilter);
mManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {
public void onSuccess() {
Log.v(TAG,"Peers trouvés");
}
public void onFailure(int reasonCode) {
Log.v(TAG,"Pas de Peers");
}
});
}
@Override
protected void onResume() {
super.onResume();
registerReceiver(mReceiver, mIntentFilter);
}
// unregister the broadcast receiver
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
}
融洽调试
05-27 19:52:04.877: I/ActivityManager(883): START u0{act=com.antony.projetjava.SETTING cmp=com.antony.projetjava/.Setting} from pid 26622
05-27 19:52:04.887: D/alsa_ucm(322): Setting mixer control: RX3 MIX1 INP2, value: RX2
05-27 19:52:04.887: D/alsa_ucm(322): Setting mixer control: LINEOUT1 Volume, value: 100
05-27 19:52:04.887: D/alsa_ucm(322): Set mixer controls for HiFi enable 1
05-27 19:52:04.887: D/alsa_ucm(322): Setting mixer control: SLIMBUS_0_RX Audio Mixer MultiMedia1, value: 1
05-27 19:52:04.887: D/ALSADevice(322): close: handle 0xb7b92558 h 0x0
05-27 19:52:04.887: D/ALSADevice(322): open: handle 0xb7b92558, format 0x2
05-27 19:52:04.887: V/ALSADevice(322): Music case
05-27 19:52:04.887: D/ALSADevice(322): Device value returned is hw:0,0
05-27 19:52:04.887: V/ALSADevice(322): flags 0, devName hw:0,0
05-27 19:52:04.887: V/ALSADevice(322): pcm_open returned fd 52
05-27 19:52:04.887: D/ALSADevice(322): handle->format: 0x2
05-27 19:52:04.887: D/ALSADevice(322): setHardwareParams: reqBuffSize 2048 channels 2 sampleRate 48000
05-27 19:52:04.897: D/ALSADevice(322): setHardwareParams: buffer_size 16384, period_size 2048, period_cnt 8
05-27 19:52:04.957: V/MyActivity(26622): Le wifi est activé
05-27 19:52:04.987: V/MyActivity(26622): Peers trouvés
05-27 19:52:05.017: I/ActivityManager(883): Process com.sonyericsson.android.addoncamera.artfilter (pid 26847) has died.
05-27 19:52:05.027: V/ConfigFetchTask(23571): ConfigFetchTask getDeviceDataVersionInfo(): ABFEt1U5oPLeaz5n1CwCqvFpZkxG4WwfQxYxP2KRhpltKe4LJBInvGq8E0LpRLgN9_vz-WYcA_6MyGGEFaYKMwV--02nqJtaeAGQ1T8T4P7y6CcIAahCVWwRA90itazfifg03YCOUVKNuWdV2trRG6IWUI2h1tUSCwPtvAtkT4zjQQf1882yGf8mF7_irgoCR7iwIATVhiPLNm53WQXPmhGT2Mj2cE5BM0VmYV_SujciqV2JF0Bmncw
05-27 19:52:05.027: I/GoogleURLConnFactory(23571): Using platform SSLCertificateSocketFactory
05-27 19:52:05.037: I/sysmon-tsens_tz_sensor3(315): sensor_work - read value = 340
05-27 19:52:05.037: I/sysmon-tsens_tz_sensor0(315): sensor_work - read value = 350
05-27 19:52:05.067: I/ActivityManager(883): Displayed com.antony.projetjava/.Setting: +131ms
最佳答案
您的广播接收器应该只调用请求对等点。
public class WifiDirectBroadcastReceiver extends BroadcastReceiver {
private WifiP2pManager manager;
private Channel channel;
private Setting activity;
private PeerListListener myPeerListListener;
private static final String TAG = "MyActivity";
public WifiDirectBroadcastReceiver(WifiP2pManager manager, Channel channel, Setting activity){
super();
this.manager = manager;
this.channel = channel;
this.activity = activity;
}
@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
int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, -1);
if (state == WifiP2pManager.WIFI_P2P_STATE_ENABLED) {
//TO BE COMPLETED
} else {
//TO BE COMPLETED
}
} else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
// Call WifiP2pManager.requestPeers() to get a list of current peers
if (manager != null) {
manager.requestPeers(channel,peerlistlistener)// here pass your activity instance as listener
}
} 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
}
}
}
您的 Activity 需要实现 PeerListListener
public class Setting extends FragmentActivity implements PeerListListener{
private WifiDirectBroadcastReceiver mReceiver;
private WifiP2pManager mManager;
private Channel mChannel;
private IntentFilter mIntentFilter=new IntentFilter();
private static final String TAG = "MyActivity";
private Collection <WifiP2pDevice> peers;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
mChannel = mManager.initialize(this, getMainLooper(), null);
mReceiver = new WifiDirectBroadcastReceiver(mManager, mChannel, this);
final Button btnScan = (Button)findViewById(R.id.btnScan);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
mIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
Log.v(TAG,"Le wifi est activé");
registerReceiver(mReceiver, mIntentFilter);
mManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {
public void onSuccess() {
Log.v(TAG,"Peers trouvés");
}
public void onFailure(int reasonCode) {
Log.v(TAG,"Pas de Peers");
}
});
}
@Override
protected void onResume() {
super.onResume();
registerReceiver(mReceiver, mIntentFilter);
}
// unregister the broadcast receiver
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
@Override
public void onPeersAvailable(WifiP2pDeviceList peers) {
WifiP2pDevice device;
for (int i = 0; i < peerList.getDeviceList().size(); i++)
{
device = (WifiP2pDevice) (peerList.getDeviceList().toArray())[i];
}
}
}
关于java - WifiP2p:我的 Activity 不使用BroadcastReceiver(我认为..)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30490621/