Je ne reçois pas d'action sur mon Broadcasteceiver - Android Studio

C'est mon premier temps de travailler avec le module Bluetooth à Android, j'essaie de numériser des périphériques non jumelés et de les montrer dans un message mais cela ne fonctionne pas. J'ai essayé beaucoup de choses mais rien. J'ai toutes les autorisations nécessaires. Cela fait partie de mon code

private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

    @Override public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();

            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                listAdapter.add(device.getName() + device.getAddress());
                listAdapter.notifyDataSetChanged();
                showToast("Action Scan Mode " );

            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                mpossibleBtn.setText("Scanning Bluetooth Devices");
                showToast("Scannning Bluetooth Devices... " );
            } else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
                mpossibleBtn.setText("Scanning in progress...");
                showToast("Scanning in progress... " );
            }


            if (action.equals(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED)) {
                showToast("Action Scan Mode " );
                int modeValue=intent.getIntExtra(BluetoothAdapter.EXTRA_SCAN_MODE, BluetoothAdapter.ERROR);

                if(modeValue==BluetoothAdapter.SCAN_MODE_CONNECTABLE){
                    mPairedTv.setText("The device is not in discoverable mode but still can receive connections");
                } else if(modeValue==BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE){
                    mPairedTv.setText("The device is in discoverable mode");
                    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    String deviceName = device.getName();
                    String deviceHardwareAddress = device.getAddress(); // MAC address
                    showToast("onReceive: " + device.getName() + ": " + device.getAddress());
                } else if (modeValue==BluetoothAdapter.SCAN_MODE_NONE){
                    mPairedTv.setText("The device is not in discoverable mode and can't receive connection");
                } else{
                    mPairedTv.setText("Error");
                }
            }
        }
    };