我正在开发一个基于WiFi Direct for
Android的简单应用程序,它必须连接两个设备.为此,我需要调用funciónonPeersAvailable(myPeerListListener),但我不知道如何.
我的应用程序有这两个元素：
1主要活动：
package android.nacho.WifiDirect;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class WifiDirect extends Activity {
WifiP2pManager mManager;
Channel mChannel;
BroadcastReceiver mReceiver;
IntentFilter mIntentFilter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wifi_direct);
//To register the BroadastReceiver
mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
mChannel = mManager.initialize(this,getMainLooper(),null); //It was necessary to make a cast (Channel)
mReceiver = new WiFiBroadcastReceiver(mManager,mChannel,this); //,this);
//Layout
final Button btnScan = (Button)findViewById(R.id.btnScan);
final TextView TextDebug=(TextView)findViewById(R.id.TextDebug);
//To define the filter in the BroadcastReceiver
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);
final OnClickListener ScanListener=new OnClickListener() //Sacado de TEstPsycologico
{
public void onClick(View v){
TextDebug.setText("Se intentan buscar Peers");
mManager.discoverPeers(mChannel,new WifiP2pManager.ActionListener() {
public void onSuccess() {
TextDebug.setText("Ha habido éxito buscando Peers");//DEBUG: Para ver si es posible encontrar Peers
}
public void onFailure(int reasonCode) {
TextDebug.setText("Algo ha salido mal buscando Peers"); //DEBUG: Para ver si pasó algo raro busando Peers
}
});
onPeersAvailable(myPeerListListener);
}
};
btnScan.setOnClickListener(ScanListener);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_wifi_direct,menu);
return true;
}
//
@Override
protected void onResume() {
super.onResume();
registerReceiver(mReceiver,mIntentFilter);
}
// unregister the broadcast receiver
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
}
2类BroadcastReceiver：
package android.nacho.WifiDirect;
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.widget.Toast;
/**
* A BroadcastReceiver that notifies of important Wi-Fi p2p events.
*/
public class WiFiBroadcastReceiver extends BroadcastReceiver {
private WifiP2pManager manager;
private Channel channel;
private WifiDirect activity;
private PeerListListener myPeerListListener;
//For toast,add also context
//private Context context;
public WiFiBroadcastReceiver(WifiP2pManager manager,Channel channel,WifiDirect activity){//,Context context) {
super();
this.manager = manager;
this.channel = channel;
this.activity = activity;
// this.context= context;
}
@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) {
//Toast.makeText(context,"Wi-Fi Direct is enable",Toast.LENGTH_LONG).show();
} else {
//Toast.makeText(context,"Wi-Fi Direct is not enable",Toast.LENGTH_LONG).show();
}
} 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()
if (manager != null) {
manager.requestPeers(channel,myPeerListListener);
manager.onPeersAvailable(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
}
}
}
到目前为止,我的代码应该能够检测运行应用程序的设备周围的对等体,哪个ID应该存储在变量myPeerListListener中.所有这些都发生在名为OnReceiv()的BroadcastReceiver方法的第二个意图中,通过调用：
manager.requestPeers(channel,myPeerListListener);
现在我想操纵那个列表.因此,根据API信息,它应该调用requestPeers,您可以在此处查看API：
http://developer.android.com/guide/topics/connectivity/wifip2p.html
*发现同行的部分
所以我试过的是在下面打电话给：
manager.onPeersAvailable(myPeerListListener);
但我得到这个错误：
对于WifiP2pManager类型,未定义onPeersAvailable(WifiP2pManager.PeerListListener)方法
谁能告诉我怎样才能将PeerListListener正确发送到主活动？
非常感谢您的宝贵时间
@H_502_34@解决方法
您应该在PeerListListener中实现onPeersAvailable方法.
有关更多信息,请参阅http://developer.android.com/training/connect-devices-wirelessly/wifi-direct.html.
@H_502_34@ @H_502_34@ 原文链接：https://www.f2er.com/android/317662.html