Android藍牙應用程序

Question

您好我有點新的Android上開發和最近開始使用藍牙API。我已經能夠將我的手機連接到與我的Arduino NANO連接的HC-06。但我似乎無法正確傳輸數據。我的目標是從設備中獲取當前值並將其保存到應用程序中的一個變量，同時也顯示它。這是我的代碼arduino和應用程序。

Android Studio中

package com.clipius.clipiusweight; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.app.Activity; 
import android.bluetooth.BluetoothAdapter; 
import android.bluetooth.BluetoothDevice; 
import android.bluetooth.BluetoothSocket; 
import android.content.Intent; 
import android.os.Bundle; 
import android.os.Handler; 
import android.view.View; 
import android.widget.TextView; 
import android.widget.EditText; 
import android.widget.Button; 
import android.widget.Toast; 

import java.io.IOException; 
import java.io.InputStream; 
import java.io.OutputStream; 
import java.util.Set; 
import java.util.UUID; 

public class MainActivity extends AppCompatActivity { 

    TextView myLabel; 
    TextView dataLabel; 
    EditText myTextbox; 
    BluetoothAdapter mBluetoothAdapter; 
    BluetoothSocket mmSocket; 
    BluetoothDevice mmDevice; 
    OutputStream mmOutputStream; 
    InputStream mmInputStream; 
    Thread workerThread; 
    byte[] readBuffer; 
    int readBufferPosition; 
    int counter; 
    volatile boolean stopWorker; 

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

     Button openButton = (Button)findViewById(R.id.getDataB); 
     Button sendButton = (Button)findViewById(R.id.sendDataB); 
     //Button closeButton = (Button)findViewById(R.id.close); 
     myLabel = (TextView)findViewById(R.id.ConnectionCheck); 
     dataLabel = (TextView) findViewById(R.id.weightValueText); 
     //myTextbox = (EditText)findViewById(R.id.weightValueText); 

     //Open Button 
     openButton.setOnClickListener(new View.OnClickListener() 
     { 
      public void onClick(View v) 
      { 
       try 
       { 
        findBT(); 
        openBT(); 
       } 
       catch (IOException ex) { } 
      } 
     }); 

    } 



    void findBT() 
    { 
     mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 
     if(mBluetoothAdapter == null) 
     { 
      myLabel.setText("No bluetooth adapter available"); 
     } 

     if(!mBluetoothAdapter.isEnabled()) 
     { 
      Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableBluetooth, 0); 
     } 

     Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices(); 
     if(pairedDevices.size() > 0) 
     { 
      for(BluetoothDevice device : pairedDevices) 
      { 
       if(device.getName().equals("HC-06")) 
       { 
        mmDevice = device; 
        break; 
       } 
      } 
     } 
     myLabel.setText("Bluetooth Device Found"); 
    } 

    void openBT() throws IOException 
    { 
     UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); //Standard SerialPortService ID 
     mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid); 
     mmSocket.connect(); 
     mmOutputStream = mmSocket.getOutputStream(); 
     mmInputStream = mmSocket.getInputStream(); 

     beginListenForData(); 

     myLabel.setText("Bluetooth Opened"); 
    } 

    void beginListenForData() 
    { 
     final Handler handler = new Handler(); 
     final byte delimiter = 10; //This is the ASCII code for a newline character // old 10 

     stopWorker = false; 
     readBufferPosition = 0; 
     readBuffer = new byte[1024]; 
     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() 
             { 
              dataLabel.setText(data); 
             } 
            }); 
           } 
           else 
           { 
            readBuffer[readBufferPosition++] = b; 
           } 
          } 
         } 
        } 
        catch (IOException ex) 
        { 
         stopWorker = true; 
        } 
       } 
      } 
     }); 
     Toast.makeText(getApplicationContext(), "Starting Worker Thread", Toast.LENGTH_SHORT).show(); 
     workerThread.start(); 
    } 

} 

的Arduino

#include <SoftwareSerial.h> 

int sensorPin = A0; 
int sensorValue = 0; 
char stringValue[5]; 

SoftwareSerial BTserial(10, 11); // RX | TX 


void setup() { 
Serial.begin(9600); 
BTserial.begin(9600);  
} 

void loop() { 

// Gets the int. value of the sensor 
sensorValue = analogRead(sensorPin); 

//conversion to string so AS can read it in. 
itoa(sensorValue, stringValue, 10); 

// Writes value to console for debugging 
Serial.println(stringValue); 


     BTserial.print(stringValue); 
     BTserial.print(sensorValue); 

      delay(1000); 

Answer 1

我所有的Android/Arduino的項目中，我使用此線程：
（讓我知道如果你需要更多的信息，因爲這種方法可行！ ！）
在openButton的OnClick中啓動連接線程。

連接螺紋（建立穩定的連接）：

private class ConnectThread extends Thread { 
    private final BluetoothDevice mmDevice; 
    private BluetoothSocket mmSocket; 

    ConnectThread(BluetoothDevice device) { 
     mmDevice = device; 
     try { 
      tmp = device.createRfcommSocketToServiceRecord(MY_UUID); 
     } catch (IOException e) { 
      //connectedNotification("DIS"); 
     } 
     mmSocket = tmp; 
    } 

    public void run() { 
     //connectedNotification("Connecting ..."); 
     mBluetoothAdapter.cancelDiscovery(); 
     try { 
      mmSocket.connect(); 
      beginListenForData(); 
     } catch (IOException connectException) { 
      try { 
       mmSocket = (BluetoothSocket) mmDevice.getClass().getMethod("createRfcommSocket", new Class[]{int.class}).invoke(mmDevice, 1); 
       mmSocket.connect(); 
       beginListenForData(); 
      } catch (Exception e2) { 
       try { 
        mmSocket.close(); 
        //connectedNotification("DIS"); 
       } catch (IOException closeException) { 
        //connectedNotification("DIS"); 
       } 
      } 
     } 
    } 

    void cancel() { 
     try { 
      mmSocket.close(); 
     } catch (IOException e) { 
      //connectedNotification("DIS"); 
     } 
    } 
}