android-bluetooth

I'm new to Android developing and I would like to make an app that sends and receive text using bluetooth. I got everything regarding the sending text logically working, but when I try to test it in my phone, I can't see the interface. Here's the Main Activity Code import android.support.v7.app.ActionBarActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.os.Build;

I did debug on my project and my 3. fragment cant connect Bluetooth service. That include send message to other devices. My connection is starting 1st fragment my device id and device name should keep bluetooth service but i connect with below code my connection null and ConnectedThread return null object. So how can i connect bluetooth service java in my fragment again ? I am calling this line on my Fragment mBluetoothConnection = new BluetoothConnectionService(getActivity().getApplicationContext()); And write function in BluetoothService.java: button.setOnClickListener(new View

I'm new in Android BLE so my question may be uncorrect or naive in some way. If this is the case please explain me where I'm wrong and kindly show me the correct way to manage this scenario. Scenario is the following: my Android app communicates with a BLE device sending commands and getting answers from device using BLE characteristics. Sequence is: Device wakes up the app (the onConnectionStateChange method is called) My app writes a command in a characteristic (I call writeCharacteristic putting the command in value parameter). Device sends back the answer to command to my app (the

We are writing a ble application where want to have a persistent connection with the peripheral we want to connect. For the same purpose we want to re-connect with the peripheral whenever we loose a existing connection. So our android application as a central just tries to reconnect by creating new bluetoothgatt object by calling bluetoothdevice.connectgatt with autoconnect as true. But whenever we try to do that our reconnection gets failed with 12-02 21:47:11.865: D/BluetoothGatt(31963): onClientConnectionState() - status=133 clientIf=6 device=******** callback. because our connection