Requesting multiple Bluetooth permissions in Android Marshmallow
<p>I'm developing an app with connectivity which connects to a Bluetooth device with SDK 23 as compile with. I'm having problems with requesting multiple permissions for Bluetooth. This is what I have done so far:</p>

<pre><code>@Override
public void onStart() {
    super.onStart();
    if (D)
        Log.e(TAG, "++ ON START ++");


    if (ContextCompat.checkSelfPermission(MyBlueToothClientActivity.this,
            Manifest.permission.BLUETOOTH)
            != PackageManager.PERMISSION_GRANTED) {
    } else {
        ActivityCompat.requestPermissions(MyBlueToothClientActivity.this,
                new String[]{Manifest.permission.BLUETOOTH, Manifest.permission.BLUETOOTH_ADMIN},
                REQUEST_ENABLE_BT);
    }


    if (ContextCompat.checkSelfPermission(MyBlueToothClientActivity.this,
            Manifest.permission.BLUETOOTH)
            != PackageManager.PERMISSION_GRANTED) {
    } else {

        ActivityCompat.requestPermissions(MyBlueToothClientActivity.this,
                new String[]{Manifest.permission.BLUETOOTH, Manifest.permission.BLUETOOTH_ADMIN},
                REQUEST_CONNECT_DEVICE_INSECURE);
    }
}


@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case REQUEST_ENABLE_BT: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length &gt; 0
                    &amp;&amp; grantResults[0] == PackageManager.PERMISSION_GRANTED) {

    // permission was granted, yay! 
                Intent enableIntent = new Intent(
                        BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableIntent, REQUEST_ENABLE_BT);


            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                if (CommonData.mChatService == null)
                    setupChat();

                Toast.makeText(MyBlueToothClientActivity.this, "Permission denied for bluetooth", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        case REQUEST_CONNECT_DEVICE_INSECURE: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length &gt; 0
                    &amp;&amp; grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay!
                Intent enableIntent = new Intent(
                        BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableIntent, REQUEST_CONNECT_DEVICE_INSECURE);


            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
                if (CommonData.mChatService == null)
                    setupChat();

                Toast.makeText(MyBlueToothClientActivity.this, "Permission denied for bluetooth", Toast.LENGTH_SHORT).show();
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}
</code></pre>

<p>Although I'm able to get the dialogue box for requesting enabling the Bluetooth, I don't get the second permission, i.e. to connect to a device. In the logcat, I get:</p>

<pre><code>    01-01 06:41:24.334 25473-25473 E/BluetoothChat: ++ ON START ++
    01-01 06:41:24.344 25473-25473 W/Activity: Can reqeust only one set of permissions at a time
</code></pre>

<p>And since I'm not able to connect to the device, I just get stuck here. And this code works fine on Android version up to Lollipop, just causes problem on the Marshmallow version.</p>