我是新手，我不知道如何在手机上打印我之前扫描过的RSSI。这是我的代码，请告诉我，我做错了什么。
我必须将其发送给最终项目，我看不到Rssi。
public class MainActivity extends AppCompatActivity {
//declare
private BluetoothAdapter mBluetoothAdapter;
private final static int REQUEST_ENABLE_BT = 1;
private BluetoothLeScanner mBluetoothLeScanner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
final BluetoothManager bluetoothManager =
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = bluetoothManager.getAdapter();
// Ensures Bluetooth is available on the device and it is enabled. If not,
// displays a dialog requesting user permission to enable Bluetooth.
if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
//start and stop scan
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
// Checks if Bluetooth LE Scanner is available.
if (mBluetoothLeScanner == null)
{
Toast.makeText(this, "Can Not Find BLE Scanner", Toast.LENGTH_SHORT).show();
finish();
return;
}
}
public class DeviceScanActivity extends ListActivity {
private BluetoothAdapter mBluetoothAdapter;
private boolean mScanning;
private android.os.Handler mHandler;
// Stops scanning after 10 seconds (10000).
private static final long SCAN_PERIOD = 1000;
private void scanLeDevice(final boolean enable) {
if (enable) {
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable()
{
@Override
public void run()
{
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
mScanning = false;
mBluetoothLeScanner.stopScan((ScanCallback) mLeScanCallback);
}
}, SCAN_PERIOD);
mBluetoothLeScanner = mBluetoothAdapter.getBluetoothLeScanner();
mScanning = true;
mBluetoothLeScanner.startScan((ScanCallback) mLeScanCallback);
} else
{
mScanning = false;
mBluetoothLeScanner.stopScan((ScanCallback) mLeScanCallback);
}
}
}
private BluetoothAdapter.LeScanCallback mLeScanCallback =
new BluetoothAdapter.LeScanCallback() {
public void onLeScan(final BluetoothDevice device, final int rssi, byte[] scanRecord) {
runOnUiThread(new Runnable() {
@Override
public void run()
{
TextView SwitchOff = (TextView) findViewById(R.id.txonoff);
SwitchOff = (TextView) findViewById(R.id.txonoff);
SwitchOff.getText();
SwitchOff.setText("Potència= " + rssi + "dBm\n");
}
});
}
};
};