void beginListenForData() {
//final Handler handler = new Handler();
final Handler handler = new Handler(Looper.getMainLooper());
final byte delimiter = 10; //This is the ASCII code for a newline character
stopWorker = false;
readBufferPosition = 0;
readBuffer = new byte[2048];
workerThread = new Thread(new Runnable() {
public void run() {
while (!Thread.currentThread().isInterrupted() && !stopWorker) {
try {
int bytesAvailable = mmInputStream.available();
if (bytesAvailable > 0) {
byte[] packetBytes = new byte[bytesAvailable];
mmInputStream.read(packetBytes);
for (int i = 0; i < bytesAvailable; i++) {
byte b = packetBytes[i];
if (b == delimiter) {
byte[] encodedBytes = new byte[readBufferPosition];
System.arraycopy(readBuffer, 0, encodedBytes, 0, encodedBytes.length);
final String data = new String(encodedBytes, "US-ASCII");
readBufferPosition = 0;
handler.post(new Runnable() {
public void run() {
//myLabel.setText(data);
dataArray = new String []{data};
//Log.d("dataArray", data);
}
});
} else {
readBuffer[readBufferPosition++] = b;
}
}
}
} catch (IOException ex) {
stopWorker = true;
}
}
}
});
public class Bluetooth_dataDisplay extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
String MAC = getIntent().getStringExtra("MAC");
mAdapter = BluetoothAdapter.getDefaultAdapter();
BluetoothDevice bluetoothDevice = mAdapter.getRemoteDevice(MAC);
// Initiate a connection request in a separate thread
ConnectingThread t = new ConnectingThread(bluetoothDevice);
t.start();
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new RecyclerAdapter(dataArray);
recyclerView.setAdapter(adapter);
}
Begindata()在连接的线程中调用。我试图将dataarray返回到Bluetooth_dataDisplay扩展AppCompatActivity并在oncreate中调用它。如何将dataarray发送回主要活动?请帮助任何专家。我看过帖子,谈到线程数据发送回主UI。但我很新,所以很混乱。 :(请帮忙。