Android WiFi-Direct BroadcastReceiver 无法工作

Question

我正在尝试使用 Nexus 4 连接到 WiFi Direct 网络。

我有以下代码:

public class MainActivity extends ActionBarActivity {

    WifiP2pManager mWifiP2pManager;
    Channel mChannel;
    WiFiDirectBroadcastReceiver mReceiver;
    IntentFilter mIntentFilter;

    @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);

        mWifiP2pManager = (WifiP2pManager)getSystemService(WIFI_P2P_SERVICE);
        mChannel = mWifiP2pManager.initialize(this, getMainLooper(), null);

        ((ImageButton)findViewById(R.id.imageButton_power)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("p2p", "discoverPeers() called");

                mWifiP2pManager.discoverPeers(mChannel, new WifiP2pManager.ActionListener() {

                    @Override
                    public void onSuccess() {
                        Log.d("p2p", "discoverPeers() Success");
                    }

                    @Override
                    public void onFailure(int reason) {
                        Log.d("p2p", "discoverPeers() Failure: " + reason);
                    }
                });
            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        mReceiver = new WiFiDirectBroadcastReceiver(mWifiP2pManager, mChannel, this);
        registerReceiver(mReceiver, mIntentFilter);

    }

    @Override
    protected void onPause() {
        super.onPause();
        unregisterReceiver(mReceiver);
    }

}

BroadcastReceiver:

public class WiFiDirectBroadcastReceiver extends BroadcastReceiver {

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

    public WiFiDirectBroadcastReceiver(WifiP2pManager manager, 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();

        Log.d("p2p", "Action: " + action);

        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)) {
            Log.d("p2p", "Requesting for peers");

            if (mManager != null) {
                mManager.requestPeers(mChannel, peerListListener);
            }
        } 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
        }
    }

    private WifiP2pManager.PeerListListener peerListListener = new WifiP2pManager.PeerListListener() {
        @Override
        public void onPeersAvailable(WifiP2pDeviceList peers) {
            Log.d("p2p", "deviceCount = " + peers.getDeviceList().size());
        }
    };
}

当我单击按钮时，discoverPeers() 返回成功。但是，我从来没有收到 IntentFilter 中指定的任何广播，当我开始/恢复 Activity 时，我收到了一些广播:

02-26 16:19:08.684 7656-7656/com.example.app D/p2p﹕ Action: android.net.wifi.p2p.STATE_CHANGED 02-26 16:19:08.684
7656-7656/com.example.app D/p2p﹕ Action: android.net.wifi.p2p.CONNECTION_STATE_CHANGE 02-26 16:19:08.684
7656-7656/com.example.app D/p2p﹕ Action: android.net.wifi.p2p.THIS_DEVICE_CHANGED

但它们都不是我注册到 IntentFilter 的，由于某种原因我得到了这 3 个，尽管它们没有添加到过滤器中。

编辑: 似乎我对字符串的名称感到困惑，它们是实际值，我确实收到了一些我添加到 IntentFilter 的操作。

Answer 1

然后您实际上得到了正确的结果，尽管它们与您预期的不同。当您更改 p2p 状态时，您应该会看到“android.net.wifi.p2p.CONNECTION_STATE_CHANGE”值。其他过滤器也是如此。查看此页面:http://developer.android.com/reference/android/net/wifi/p2p/WifiP2pManager.html#WIFI_P2P_CONNECTION_CHANGED_ACTION