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- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.lang.reflect.Method;
- import java.util.UUID;
- import android.app.Activity;
- import android.bluetooth.BluetoothAdapter;
- import android.bluetooth.BluetoothDevice;
- import android.bluetooth.BluetoothSocket;
- import android.content.Intent;
- import android.os.Build;
- import android.os.Bundle;
- import android.os.Handler;
- import android.util.Log;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.TextView;
- import android.widget.Toast;
- public class MainActivity extends Activity {
- private static final String TAG = "bluetooth2";
- Button btnOn, btnOff;
- TextView txtArduino, txtTemperature;
- Handler h;
- final int RECIEVE_MESSAGE = 1;
- private BluetoothAdapter btAdapter = null;
- private BluetoothSocket btSocket = null;
- private StringBuilder sb = new StringBuilder();
- private ConnectedThread mConnectedThread;
- // SPP UUID service
- private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
- // MAC-address of Bluetooth module (you must edit this line)
- private static String address = "20:13:05:07:02:07";
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- btnOn = (Button) findViewById(R.id.button2); // button LED ON
- btnOff = (Button) findViewById(R.id.button3); // button LED OFF
- txtArduino = (TextView) findViewById(R.id.textView2);
- txtTemperature = (TextView) findViewById(R.id.textView3);
- h = new Handler() {
- public void handleMessage(android.os.Message msg) {
- switch (msg.what) {
- case RECIEVE_MESSAGE: // if receive massage
- byte[] readBuf = (byte[]) msg.obj;
- String strIncom = new String(readBuf, 0, msg.arg1); // create string from bytes array
- sb.append(strIncom); // append string
- int endOfLineIndex = sb.indexOf("\r\n"); // determine the end-of-line
- if (endOfLineIndex > 0) { // if end-of-line,
- String sbprint = sb.substring(0, endOfLineIndex); // extract string
- sb.delete(0, sb.length()); // and clear
- if (sbprint.toCharArray()[0] == '*')
- {
- txtTemperature.setText("Teplota z čidla DHT11 je " + sbprint.substring(1, sbprint.length() ) + "°C");
- }
- else
- {
- txtArduino.setText(sbprint + "\n" + txtArduino.getText()); // update TextView
- }
- }
- break;
- }
- };
- };
- btAdapter = BluetoothAdapter.getDefaultAdapter();
- checkBTState();
- // tlačítko ON
- btnOn.setOnClickListener(new OnClickListener() {
- public void onClick(View v) {
- mConnectedThread.write("1"); // Send "1" via Bluetooth
- //Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show();
- }
- });
- btnOff.setOnClickListener(new OnClickListener() {
- public void onClick(View v) {
- mConnectedThread.write("0"); // Send "0" via Bluetooth
- //Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show();
- }
- });
- }
- private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
- if(Build.VERSION.SDK_INT >= 10){
- try {
- final Method m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord", new Class[] { UUID.class });
- return (BluetoothSocket) m.invoke(device, MY_UUID);
- } catch (Exception e) {
- Log.e(TAG, "Could not create Insecure RFComm Connection",e);
- }
- }
- return device.createRfcommSocketToServiceRecord(MY_UUID);
- }
- @Override
- public void onResume() {
- super.onResume();
- BluetoothDevice device = btAdapter.getRemoteDevice(address);
- try {
- btSocket = createBluetoothSocket(device);
- } catch (IOException e) {
- errorExit("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + ".");
- }
- // Discovery is resource intensive. Make sure it isn't going on
- // when you attempt to connect and pass your message.
- btAdapter.cancelDiscovery();
- // Establish the connection. This will block until it connects.
- Log.d(TAG, "...Connecting...");
- try {
- btSocket.connect();
- Log.d(TAG, "....Connection ok...");
- } catch (IOException e) {
- try {
- btSocket.close();
- } catch (IOException e2) {
- errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
- }
- }
- // Create a data stream so we can talk to server.
- Log.d(TAG, "...Create Socket...");
- mConnectedThread = new ConnectedThread(btSocket);
- mConnectedThread.start();
- }
- @Override
- public void onPause() {
- super.onPause();
- Log.d(TAG, "...In onPause()...");
- try {
- btSocket.close();
- } catch (IOException e2) {
- errorExit("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
- }
- }
- private void checkBTState() {
- if(btAdapter==null) {
- Log.d(TAG, "Zařízení nepodporuje Bluetooth");
- } else {
- if (btAdapter.isEnabled()) {
- Log.d(TAG, "...Bluetooth ON...");
- } else {
- //Prompt user to turn on Bluetooth
- Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
- startActivityForResult(enableBtIntent, 1);
- }
- }
- }
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- // TODO Auto-generated method stub
- if(requestCode == 884){
- if (resultCode == RESULT_OK){
- Toast.makeText(getApplicationContext(), "BlueTooth is now Enabled", Toast.LENGTH_LONG).show();
- Log.d(TAG, "Zapnuté bluetooth...");
- }
- if(resultCode == RESULT_CANCELED){
- Toast.makeText(getApplicationContext(), "Error occured while enabling.Leaving the application..", Toast.LENGTH_LONG).show();
- Log.d(TAG, "Vypnuté bluetooth...");
- ///finish();
- }
- }
- }//onActivityResult
- private void errorExit(String title, String message){
- Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
- finish();
- }
- private class ConnectedThread extends Thread {
- private final InputStream mmInStream;
- private final OutputStream mmOutStream;
- public ConnectedThread(BluetoothSocket 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 = new byte[256]; // 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(buffer); // Get number of bytes and message in "buffer"
- h.obtainMessage(RECIEVE_MESSAGE, bytes, -1, buffer).sendToTarget(); // Send to message queue Handler
- } catch (IOException e) {
- break;
- }
- }
- }
- /* Call this from the main activity to send data to the remote device */
- public void write(String message) {
- Log.d(TAG, "...Data to send: " + message + "...");
- byte[] msgBuffer = message.getBytes();
- try {
- mmOutStream.write(msgBuffer);
- } catch (IOException e) {
- Log.d(TAG, "...Error data send: " + e.getMessage() + "...");
- }
- }
- }
- }
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