我希望我的TextView LineHunt1每次在InputStream上都有更新，在收到MSG消息后由mHandler处理。来自流的正确数据显示在logcat中，但TextView上没有显示任何内容。我尝试了很多不同的方法，但都没有。
这是我的代码：
public class MainActivity extends Activity {
public static final int CONNECTION_SUCCESSFUL = 1;
protected static final int CONNECTION_FAILED = 0;
protected static final int DISCONNECTED = 2;
protected static final int MSG = 3;
public boolean connected=false;
static Handler mHandler;
Activity mActivity;
static String data="1";
String message="da4o";
static TextView LineHunt1;
SeekBar LRseek;
TextView LRprogress;
public BluetoothAdapter BTadapter = BluetoothAdapter.getDefaultAdapter();
private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
ConnectThread connect;
ConnectedThread IOthread;
BluetoothDevice device;
BluetoothSocket socket;
String address = "20:13:06:14:02:72";
float discrete=0;
float start=0;
float end=100;
float start_pos=50;
int start_position=50;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
mActivity = this;
ImageView right = (ImageView) findViewById(R.id.right);
ImageView left = (ImageView) findViewById(R.id.left);
ImageView up = (ImageView) findViewById(R.id.up);
ImageView down = (ImageView) findViewById(R.id.down);
LRseek = (SeekBar) findViewById(R.id.LRseek);
LRprogress = (TextView) findViewById(R.id.LRprogress);
mHandler = new Handler(){
public void handleMessage(Message msg){
super.handleMessage(msg);
switch(msg.what){
case CONNECTION_SUCCESSFUL:
Toast.makeText(getApplicationContext(), "Zariadenie pripojené", Toast.LENGTH_SHORT).show();
connected=true;
break;
case CONNECTION_FAILED: Toast.makeText(getApplicationContext(),"Nepodarilo sa pripojiť" , Toast.LENGTH_SHORT).show();
connected=false;
break;
case DISCONNECTED: Toast.makeText(getApplicationContext(), "Zariadenie bolo odpojené", Toast.LENGTH_SHORT).show();
connected=false;
break;
case MSG: setData((String) msg.obj);
if(data.contains("[B")){break;}
else {
mActivity.runOnUiThread(new Runnable() {
public void run() {
LineHunt1 = (TextView) findViewById(R.id.LineHunt1);
LineHunt1.setText(data);
}
});
Log.d("INPUT",data);
}
break;
}
}
};
LRseek.setProgress(start_position);
LRseek.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
LRseek.setProgress(50);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {
// TODO Auto-generated method stub
// To convert it as discrete value
String seekProgress = "" + LRseek.getProgress();
LRprogress.setText(seekProgress);
send("LR " + seekProgress);
}
});
right.setOnTouchListener(new OnTouchListener(){
@Override
public boolean onTouch(View arg, MotionEvent event)
{
String string;
TextView tRight = (TextView) findViewById(R.id.tRight);
string = arg.getTag().toString();
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
tRight.setText(string);
send("r");
break;
case MotionEvent.ACTION_UP:
tRight.setText("release");
send("R");
break;
}
return true;
}
});
left.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View arg, MotionEvent event)
{
String string;
TextView tLeft = (TextView) findViewById(R.id.tLeft);
string = arg.getTag().toString();
switch(event.getAction()){
case MotionEvent.ACTION_DOWN :
tLeft.setText(string);
send("l");
break;
case MotionEvent.ACTION_UP:
tLeft.setText("release");
send("L");
break;
}
return true;
}
});
up.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View arg, MotionEvent event)
{
String string;
TextView tUp = (TextView) findViewById(R.id.tUp);
string = arg.getTag().toString();
switch(event.getAction()){
case MotionEvent.ACTION_DOWN :
tUp.setText(string);
send("f");
break;
case MotionEvent.ACTION_UP:
tUp.setText("release");
send("F");
break;
}
return true;
}
});
down.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View arg, MotionEvent event)
{
String string;
TextView tDown = (TextView) findViewById(R.id.tDown);
string = arg.getTag().toString();
switch(event.getAction()){
case MotionEvent.ACTION_DOWN :
tDown.setText(string);
send("b");
break;
case MotionEvent.ACTION_UP:
tDown.setText("release");
send("B");
break;
}
return true;
}
});
}
@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;
}
public void send(String st){
if(connected)IOthread.write(st);
}
public void connect(View v) {
if (!BTadapter.isEnabled()) {
Intent enableIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivity(enableIntent);
}
if(BTadapter.isEnabled()){
if(connected){
connect.cancel();
Toast.makeText(getApplicationContext(), "Disconnected", Toast.LENGTH_SHORT).show();
}
if(!connected){
Toast.makeText(getApplicationContext(), "Connecting...", Toast.LENGTH_SHORT).show();
device = BTadapter.getRemoteDevice(address);
connect = new ConnectThread(device);
IOthread = new ConnectedThread(connect.mmSocket);
connect.run();
//IOthread.run();
}}
}
public void Irun(View v)
{
IOthread.start();
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
//Log.d("masaker",device.getUuids().toString());
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server code
tmp = mmDevice.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {Log.d("lager","ta co"); }
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
BTadapter.cancelDiscovery();
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) {
}
// mHandler.obtainMessage(CONNECTION_FAILED, mmSocket).sendToTarget();
return;
}
// Do work to manage the connection (in a separate thread)
//manageConnectedSocket(mmSocket);
mHandler.obtainMessage(CONNECTION_SUCCESSFUL, mmSocket).sendToTarget();
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
mHandler.obtainMessage(DISCONNECTED).sendToTarget();
} catch (IOException e) { }
}
}
private class ConnectedThread extends Thread {
/* private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;*/
BluetoothSocket mmSocket;
InputStream mmInStream;
OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
OutputStream tmpOut = null;
InputStream tmpIn = 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 = new byte[1024]; // 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
bytes = mmInStream.read();
mHandler.obtainMessage(MSG, bytes, -1, buffer.toString()).sendToTarget();
} catch (IOException e) {
break;
}
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
public void write(String strings) {
try {
mmOutStream.write(strings.getBytes());
Log.d("", strings);
} catch (IOException e) { Log.d("ERR_OUT", "FEJL");}
}
}