how to perform all tasks at once?

Question

I can’t get you to perform all these tasks at the same time, only perform the rest when you get some data on InputStream. And once he gets that data, he doesn’t get any more. Please help me, I’m new and I’ve tried several examples but I can’t make it work.

package com.vaiporra;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.os.SystemClock;

import android.view.View;
import android.widget.Button;
import android.widget.Chronometer;

import android.widget.Toast;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import java.io.IOException;



public class MainActivity extends Activity{

    Button btDireita; 
    Button btEsquerda;
    Chronometer crono1;
    char serial;
    BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
    private BluetoothDevice dispositivoBluetoohRemoto;
    private BluetoothSocket meuSocket;
    private OutputStream outputStream=null;
    private InputStream inputStream = null;
    private static final String MAC = "60:BE:B5:7A:FD:49";
    private static final UUID MEU_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (!bluetooth.isEnabled()) {
            bluetooth.enable();
        } 

        conecta();

        ChamaPrincipal();
    }

    private void ChamaPrincipal() {
        setContentView(R.layout.activity_main);

        crono1= (Chronometer)findViewById(R.id.crono1);

        crono1.setBase(SystemClock.elapsedRealtime());

        crono1.start();

        btEsquerda = (Button)findViewById(R.id.button1);

        btEsquerda.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                try{
                    outputStream = null;
                    outputStream = meuSocket.getOutputStream();
                    outputStream.write('a');

                    Toast.makeText(getApplicationContext(), "Mensagem foi enviada", Toast.LENGTH_LONG).show();
                } catch(IOException e){
                    Toast.makeText(getApplicationContext(), "Mensagem não recebida", Toast.LENGTH_LONG).show();

                }
            }
        });
        btDireita = (Button)findViewById(R.id.button2);

        btDireita.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                try{
                    outputStream = null;
                    outputStream = meuSocket.getOutputStream();
                    outputStream.write('b');

                    Toast.makeText(getApplicationContext(), "Mensagem foi enviada", Toast.LENGTH_LONG).show();
                } catch(IOException e){
                    Toast.makeText(getApplicationContext(), "Mensagem não recebida", Toast.LENGTH_LONG).show();

                }
            }
        });
        try{
            while(true){

                inputStream = meuSocket.getInputStream();
                serial = (char) inputStream.read();

                if(serial == 'a'){
                    chamaPQP();
                }
                else if(serial == 'b'){
                    chamaTNC();
                }
                else{
                     Toast.makeText(getApplicationContext(), "Manda outro", Toast.LENGTH_SHORT).show();
                }
         }}
        catch(Exception e){}

    }

    private void chamaTNC() {
        setContentView(R.layout.tnc);

    }

    private void chamaPQP() {
        setContentView(R.layout.pqp);

    }

    public void conecta(){
        if(BluetoothAdapter.checkBluetoothAddress(MAC)){
            dispositivoBluetoohRemoto = bluetooth.getRemoteDevice(MAC);
        } else{ 
            Toast.makeText(getApplicationContext(), "Endereço MAC do dispositivo Bluetooth remoto não é válido", Toast.LENGTH_SHORT).show();
        }

        try{
            meuSocket = dispositivoBluetoohRemoto.createRfcommSocketToServiceRecord(MEU_UUID);

            meuSocket.connect();

            Toast.makeText(getApplicationContext(), "Conectado", Toast.LENGTH_SHORT).show();

        } catch(IOException e){
            Toast.makeText(getApplicationContext(), "Conexão não foi estabelecida", Toast.LENGTH_SHORT).show();
        }
    }       
}