Bluetooth inputstream

        import java.io.IOException;
        import java.io.InputStream;
        import java.io.OutputStream;
        import java.util.ArrayList;
        import java.util.Set;
        import java.util.UUID;//test

        import android.app.Activity;
        import android.bluetooth.BluetoothAdapter;
        import android.bluetooth.BluetoothDevice;
        import android.bluetooth.BluetoothSocket;
        import android.content.BroadcastReceiver;
        import android.content.Context;
        import android.content.Intent;
        import android.content.IntentFilter;
        import android.os.Bundle;
        import android.os.Handler;
        import android.os.Message;
        import android.util.Log;
        import android.view.View;
        import android.widget.AdapterView;
        import android.widget.AdapterView.OnItemClickListener;
        import android.widget.ArrayAdapter;
        import android.widget.ListView;
        import android.widget.Toast;

public class MainActivity extends Activity implements AdapterView.OnItemClickListener {

    private Handler handler;
    String value;

    ArrayAdapter<String> listAdapter;
    ListView listView;
    BluetoothAdapter btAdapter;
    Set<BluetoothDevice> devicesArray;
    ArrayList<String> pairedDevices;
    ArrayList<BluetoothDevice> devices;
    public static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
    protected static final int SUCCESS_CONNECT = 0;
    protected static final int MESSAGE_READ = 1;
    IntentFilter filter;
    BroadcastReceiver receiver;
    String tag = "debugging";
    Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            Log.i(tag, "in handler");
            super.handleMessage(msg);
            switch(msg.what){
                case SUCCESS_CONNECT:
                    // aktionen
                    ConnectedThread connectedThread = new ConnectedThread((BluetoothSocket)msg.obj);
                    Toast.makeText(getApplicationContext(), "CONNECT", 0).show();
                    String s = "successfully connected";
                    connectedThread.write(s.getBytes());
                    Log.i(tag, "connected");
                    break;
                case MESSAGE_READ: // HIER
                    byte[] readBuf = (byte[])msg.obj;
                    String string = new String(readBuf);
                    Toast.makeText(getApplicationContext(), string, 0).show();
                    break;
            }
        }
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        if(btAdapter==null){
            Toast.makeText(getApplicationContext(), "No bluetooth detected", 0).show();
            finish();
        }
        else{
            if(!btAdapter.isEnabled()){
                turnOnBT();
            }

            getPairedDevices();
            startDiscovery();
        }


    }
    private void startDiscovery() {
        // TODO Auto-generated method stub
        btAdapter.cancelDiscovery();
        btAdapter.startDiscovery();

    }
    private void turnOnBT() {
        // TODO Auto-generated method stub
        Intent intent =new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(intent, 1);
    }
    private void getPairedDevices() {
        // TODO Auto-generated method stub
        devicesArray = btAdapter.getBondedDevices();
        if(devicesArray.size()>0){
            for(BluetoothDevice device:devicesArray){
                pairedDevices.add(device.getName());

            }
        }
    }
    private void init() {
        // TODO Auto-generated method stub
        listView=(ListView)findViewById(R.id.bConnectedNew);
        listView.setOnItemClickListener(this);
        listAdapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
        listView.setAdapter(listAdapter);
        btAdapter = BluetoothAdapter.getDefaultAdapter();
        pairedDevices = new ArrayList<String>();
        filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        devices = new ArrayList<BluetoothDevice>();
        receiver = new BroadcastReceiver(){
            @Override
            public void onReceive(Context context, Intent intent) {
                // TODO Auto-generated method stub
                String action = intent.getAction();

                if(BluetoothDevice.ACTION_FOUND.equals(action)){
                    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    devices.add(device);
                    String s = "";
                    for(int a = 0; a < pairedDevices.size(); a++){
                        if(device.getName().equals(pairedDevices.get(a))){
                            //hinzufügen
                            s = "(Paired)";
                            break;
                        }
                    }

                    listAdapter.add(device.getName()+" "+s+" "+"\n"+device.getAddress());
                }

                else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
                    // macht irgendwas
                }
                else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
                    // macht irgendwas



                }
                else if(BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)){
                    if(btAdapter.getState() == btAdapter.STATE_OFF){
                        turnOnBT();
                    }
                }

            }
        };

        registerReceiver(receiver, filter);
        filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
        registerReceiver(receiver, filter);
        filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
        registerReceiver(receiver, filter);
        filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
        registerReceiver(receiver, filter);
    }


    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        unregisterReceiver(receiver);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_CANCELED){
            Toast.makeText(getApplicationContext(), "Bluetooth must be enabled to continue", Toast.LENGTH_SHORT).show();
            finish();
        }
    }
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                            long arg3) {
        // TODO Auto-generated method stub

        if(btAdapter.isDiscovering()){
            btAdapter.cancelDiscovery();
        }
        if(listAdapter.getItem(arg2).contains("Paired")){

            BluetoothDevice selectedDevice = devices.get(arg2);
            ConnectThread connect = new ConnectThread(selectedDevice);
            connect.start();
            Log.i(tag, "in click listener");
        }
        else{
            Toast.makeText(getApplicationContext(), "device is not paired", 0).show();
        }
    }

    private class ConnectThread extends Thread {

        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            // temporäres objekt wird genutzt, welches später zu mmSocket zugewiesen wird,
            // weil mmSocket ist starr
            BluetoothSocket tmp = null;
            mmDevice = device;
            Log.i(tag, "construct");
            // Holt BluetoothSocket um mit gegebenen BluetoothDevice zu verbinden
            try {
                // MY_UUID ist der app's UUID string,wird auch vom servercode genutzt
                tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
            } catch (IOException e) {
                Log.i(tag, "get socket failed");

            }
            mmSocket = tmp;
        }

        public void run() {
            // unterbricht suche, weil es sonst zu sehr verlangsamen würde
            btAdapter.cancelDiscovery();
            Log.i(tag, "connect - run");
            try {
                // Über socket werden die Geräte verbunden, bis eine exception greift

                mmSocket.connect();
                Log.i(tag, "connect - succeeded");
            } catch (IOException connectException) {	Log.i(tag, "connect failed");
                // wenn man nicht verbinden kann, anwendungen schließen
                try {
                    mmSocket.close();
                } catch (IOException closeException) { }
                return;
            }

            // Sachen zum managen der Verbindung (in  separaten thread)

        }







        /** Will cancel an in-progress connection, and close the socket */
        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) { }
        }
    }

    public class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;

            // Get the input and output streams, using temp objects because
            // member streams are final
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException e) {
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }

        public void run() {
            byte[] buffer;  // buffer store for the stream
            int bytes; // bytes returned from read()

            // Keep listening to the InputStream until an exception occurs
            while (true) {
                try {
                    // Read from the InputStream
                    buffer = new byte[1024];
                    bytes = mmInStream.read(buffer);
                    // sendet zu UI-Activity
                    mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
                            .sendToTarget();

                } catch (IOException e) {
                    break;
                }
            }
        }

        /* Call this from the main activity to send data to the remote device */
        public void write(byte[] bytes) {
            try {
                mmOutStream.write(bytes);
            } catch (IOException e) {
            }
        }

        /* Call this from the main activity to shutdown the connection */
        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
            }
        }
    }	}


    /*public static String convertStreamToString( InputStream is, String ecoding ) throws IOException
{
    StringBuilder sb = new StringBuilder( Math.max( 16, is.available() ) );
    char[] tmp = new char[ 4096 ];

    try {
       InputStreamReader reader = new InputStreamReader( is, ecoding );
       for( int cnt; ( cnt = reader.read( tmp ) ) > 0; )
            sb.append( tmp, 0, cnt );
    } finally {
        is.close();
    }
    return sb.toString();
}*/

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity2Activity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity2);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main_activity2, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}