我在使用startDiscovery()时遇到了麻烦.这是问题所在,我已将以下Intent注册到我的BroadcastReceiver,如下所示：

IntentFilter filterFound = new IntentFilter(BluetoothDevice.ACTION_FOUND);
IntentFilter filterStart = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
IntentFilter filterStop = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(myReceiver, filterFound);
registerReceiver(myReceiver, filterStart);
registerReceiver(myReceiver, filterStop);

这是我的广播接收器：

private BroadcastReceiver myReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
    Log.d(TAG, "onReceive (myReceiver)");
    String action = intent.getAction();
    // When discovery finds a device
    if (BluetoothDevice.ACTION_FOUND.equals(action)) {
        // Get the BluetoothDevice object from the Intent
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        // Add the name and address to an array adapter to show in a ListView
        Log.d(TAG,device.getName() + " " + device.getAddress());
        deviceListAdapter.add(device.getName() + "\n" + device.getAddress());
    }
    if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
        Log.d(TAG, "Started discovery");
    }
    if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
        Log.d(TAG, "Finished discovery");
    }
}
};

当我在我的蓝牙适配器上调用startDiscovery(蓝牙存在并启用)时,没有任何反应,我在logcat中看不到有关BroadcastReceiver的任何内容.

你有没有遇到过那种问题？任何帮助表示赞赏:)

谢谢

解决方法:

确保您对AndroidManifest.xml拥有适当的权限.特别是,要执行发现,您需要< uses-permission android：name =“android.permission.BLUETOOTH_ADMIN”/>.