Im making an android and Arduino bluetooth communicator with the HC-05 Bluetooth Module. It was working till yesterday and now the basic data exchange doesn't work. The Bluetooth connection is accomplished but this warning is raised each time and I wonder if the Data Exchange isn't happening dew to this.
Error:
V/ViewRootImpl: The specified message queue synchronization barrier token has not been posted or has already been removed
D/ViewRootImpl[LoginScreen]: windowFocusChanged hasFocus=false inTouchMode=true
W/Choreographer: Already have a pending vsync event. There should only be one at a time.
D/DecorView: onWindowFocusChangedFromViewRoot hasFocus: true, DecorView@ee56af5[ActualMainActivity]
D/ViewRootImpl[ActualMainActivity]: windowFocusChanged hasFocus=true inTouchMode=true
D/BluetoothAdapter: java.lang.Throwable
at android.bluetooth.BluetoothAdapter.<init>(BluetoothAdapter.java:762)
at android.bluetooth.BluetoothAdapter.getDefaultAdapter(BluetoothAdapter.java:735)
at com.example.pmedsensometer.SelectDeviceActivity.onCreate(SelectDeviceActivity.java:29)
at android.app.Activity.performCreate(Activity.java:8006)
at android.app.Activity.performCreate(Activity.java:7990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3584)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3775)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2246)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:233)
at android.app.ActivityThread.main(ActivityThread.java:8010)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978)
W/BluetoothAdapter: getBluetoothService(), client: android.bluetooth.BluetoothDevice$1@63edcb6
D/ViewRootImpl: support adaptive color gamut feature!
V/ViewRootImpl: The specified message queue synchronization barrier token has not been posted or has already been removed
Code for Select Device Activity Class:
package com.example.pmedsensometer;
import static android.bluetooth.BluetoothAdapter.getDefaultAdapter;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.annotation.SuppressLint;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class SelectDeviceActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select_device);
// Instantiate RecyclerView
RecyclerView recyclerView = findViewById(R.id.deviceList);
// Initialize Bluetooth adapter
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
// Fetch the list from Android device's cache
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
List<Object> deviceList = new ArrayList<>();
for (BluetoothDevice device : pairedDevices){
String deviceName = device.getName();
String deviceHardwareAddress = device.getAddress();
DeviceInfoModel deviceInfoModel = new DeviceInfoModel(deviceName,deviceHardwareAddress);
deviceList.add(deviceInfoModel);
}
// Setting Up RecyclerView
recyclerView.setLayoutManager(new LinearLayoutManager(this));
// Connecting to Data Source and Content Layout
// Data source is the list of Bluetooth devices that are paired with Android Device
ListAdapter listAdapter = new ListAdapter(this,deviceList);
recyclerView.setAdapter(listAdapter);
}
}