Android : Android Write in TextView From Thread to UI Thread [duplicate]

This question already has an answer here:

• Android “Only the original thread that created a view hierarchy can touch its views.” 8 answers

I have the following Android code which I am using to receive code from a local server. The Client Server code works as expected. The problem is when trying to get the message from a thread and write it to the TextView. I receive the following error:

03-24 15:08:22.498 22078-22136/com.example.test E/AndroidRuntime﹕ FATAL EXCEPTION: Thread-1029 Process: com.example.test, PID: 22078 android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

My code is here:

public class MainActivity extends Activity {

private ClientComms client;
private PatientData data;
private TextView outputText;
private Handler handler = new Handler();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    outputText = (TextView)findViewById(R.id.output);
    connectToServer();

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onResume()
{
    super.onResume();
}


public void connectToServer()
{
    Thread t = new Thread(){
        public void run() {

            try {
                outputText.setText("HERE");
                client = new ClientComms(**IP Address**, **Port**);


                data = new PatientData();
                data.setMessage("Test1234");

                boolean success = false;
                while (success == false) {
                    success = client.sendToServer(data);
                }

                if (success) {
                    outputText.setText("Success");
                } else {
                    outputText.setText("Fail");
                }

                data = null;

                while ((data = client.readSocket()) != null)
                {
                    System.out.println("Read Loop");
                    outputText.setText(outputText.getText() + "  Got data!   " + data.getMessage());


                    data.setMessage("Object Data");

                    boolean sendData = client.sendToServer(data);

                    if (sendData) {
                        System.out.println("Send Successful");
                    } else {
                        System.out.println("Send Fail");
                    }

                    data = null;


                    while ((data = client.readSocket()) != null) {
                        outputText.setText(outputText.getText() + " " + data.getMessage());

                        data = null;


                        while ((data = client.readSocket()) != null) {
                            outputText.setText(outputText.getText() + " " + data.getMessage());
                        }
                    }



                }
            }