Android 如何创建启动WiFi direct的按钮

我以前没有应用程序开发经验，现在应该在android studio中创建一个应用程序，通过WiFi直接连接到传感器。我读过WiFi direct，并试图遵循指南，但当使用他们的代码时，我仍然不知道如何前进。我还看过几个WiFi direct的演示应用程序

我的代码现在看起来像这样

广播接收器：

public class WiFiDirectBroadcastReceiver extends BroadcastReceiver {

private WifiP2pManager mManager;
private WifiP2pManager.Channel mChannel;
private MainActivity mActivity;

public WiFiDirectBroadcastReceiver(WifiP2pManager manager, WifiP2pManager.Channel channel,
                                   MainActivity activity) {
    super();
    this.mManager = manager;
    this.mChannel = channel;
    this.mActivity = 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) {
            mActivity.setIsWifiP2pEnabled(true);
        } else {
            mActivity.setIsWifiP2pEnabled(false);
        }

    } else if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) {
        // Call WifiP2pManager.requestPeers() to get a list of current peers
    } 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
    }
}
}

主要活动：

public class MainActivity extends AppCompatActivity {

WifiP2pManager mManager;
WifiP2pManager.Channel mChannel;
private boolean isWifiP2pEnabled = false;
BroadcastReceiver mReceiver;
IntentFilter mIntentFilter;


public void setIsWifiP2pEnabled(boolean isWifiP2pEnabled) {
    this.isWifiP2pEnabled = isWifiP2pEnabled;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    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 = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
    mChannel = mManager.initialize(this, getMainLooper(), null);
    mReceiver = new WiFiDirectBroadcastReceiver(mManager, mChannel, this);

}

/* register the broadcast receiver with the intent values to be matched */
@Override
protected void onResume() {
    super.onResume();
    mReceiver = new WiFiDirectBroadcastReceiver(mManager, mChannel, this);
    registerReceiver(mReceiver, mIntentFilter);
}
/* unregister the broadcast receiver */
@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(mReceiver);
}



}

指南的下一部分是，我应该尝试发现同龄人。我应该在哪里实现此代码

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.
    }
});

我的最终产品应该是一个按钮，当我按下它，我应该搜索同行，并能够连接到一个。传感器将直接在WiFi中启动。有人知道我在哪里可以找到更多关于如何继续的信息，或者有关于我需要什么课程等的提示吗

---

谢谢大家!

它的工作方式是：

• 点击按钮时调用

  discoverPeers

• 接下来，在您的

  WiFiDirectBroadcastReceiver

  ->

  WIFI\u P2P\u PEERS\u CHANGED\u ACTION

  条件下，请求可用对等点列表，如下所示：

  mManager.requestPeers（mcchannel，peerlistener）

• 然后，您必须在活动或片段中实现

  WifiP2pManager.peerListener

  ，因为发现的对等点将返回到此方法：

  @覆盖
  PeersAvailable上的public void（WifiP2pDeviceList peerList）{}

• 一旦有了对等点列表，您就可以使用

  
  connect（mChannel，config，new ActionListener（）{}）
  

我相信下面的内容足以让api正常工作

---

祝你好运。

谢谢！我应该在OnReceive方法中请求对等点列表，还是创建一个单独的方法，如“public void DiscoverPeers（）”或其他什么？是的，在“OnReceive”中，注释为requestPeers-->else if（WifiP2pManager.WIFI_P2P_peers_CHANGED_ACTION.equals（ACTION））{//调用WifiP2pManager.requestPeers（）要获取当前对等点的列表}