Bluetooth ile veri iki farklı etkinlikten nasıl aktarılır?

Question

Uygulamamın ışığını aydınlatmak için benim uygulamamdan Arduino kartıma veri göndermeye çalıştım. Sorun şu ki, ana etkinliğimden gönderirse çalışır, ancak ikinci bir etkinlikten (HolopickerColor) gönderirsem işe yaramaz ve herhangi bir hata alamıyorum. Anızlarınız için teşekkürler.

MainActivity:

public class MainActivity extends AppCompatActivity{ 
private Button mPairedBtn; 
Button on, find; 
public BluetoothAdapter BA; 
private ProgressDialog mProgressDlg; 
// public ConnectedThread mConnectedThread; 
private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>(); 
private DrawerLayout mDrawerLayout; 

private BluetoothSocket btSocket = null; 
private OutputStream outStream = null; 
Button btnOn, btnOff; 
// 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 ; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.activity_main); 

    on = (Button) findViewById(R.id.btn_enable); 

    find = (Button) findViewById(R.id.btn_scan); 
    mPairedBtn = (Button) findViewById(R.id.btn_view_paired); 


    BA = BluetoothAdapter.getDefaultAdapter(); 
    mProgressDlg = new ProgressDialog(this); 


    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 
    ActionBar actionBar = getSupportActionBar(); 
    actionBar.setHomeAsUpIndicator(R.drawable.ic_menu); 
    actionBar.setDisplayHomeAsUpEnabled(true); 

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view); 
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { 
     @Override 
     public boolean onNavigationItemSelected(MenuItem menuItem) { 
      menuItem.setChecked(true); 
      mDrawerLayout.closeDrawers(); 
      Toast.makeText(MainActivity.this, menuItem.getTitle(), Toast.LENGTH_LONG).show(); 
      switch (menuItem.getItemId()) { 
       case R.id.nav_item_colorlight: 
        Intent color = new Intent(MainActivity.this, HolopickerColor.class); 
        // color.putExtra("color", ConnectedThread.getInstance()); 
        startActivity(color); 
        break; 
       case R.id.nav_item_effectlight: 
        Intent light = new Intent(MainActivity.this, LightEffect.class); 
        startActivity(light); 
        break; 
       case R.id.nav_item_music: 
        Intent music = new Intent(MainActivity.this, Music.class); 
        startActivity(music); 
        break; 
       case R.id.nav_item_about: 
        Intent about = new Intent(MainActivity.this, About.class); 
        startActivity(about); 
        break; 
      } 

      return true; 
     } 
    }); 

    mProgressDlg.setMessage("Scanning..."); 
    mProgressDlg.setCancelable(false); 
    mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      dialog.dismiss(); 

      BA.cancelDiscovery(); 
     } 
    }); 

    if (BA == null) { 
     showUnsupported(); 
    } else { 
     mPairedBtn.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Set<BluetoothDevice> pairedDevices = BA.getBondedDevices(); 

       if (pairedDevices == null || pairedDevices.size() == 0) { 
        showToast("No Paired Devices Found"); 
       } else { 
        ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>(); 

        list.addAll(pairedDevices); 

        Intent intent = new Intent(MainActivity.this, DeviceListActivity.class); 

        intent.putParcelableArrayListExtra("device.list", list); 

        startActivity(intent); 
       } 
      } 
     }); 

     find.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 
       BA.startDiscovery(); 
      } 
     }); 

     on.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (BA.isEnabled()) { 
        BA.disable(); 

        showDisabled(); 
        try 
        { 
         btSocket.close(); 
        } catch (IOException e2) 
        { 
         //insert code to deal with this 
        } 

       } else { 
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 

        startActivityForResult(intent, 1000); 
       } 
      } 
     }); 

     if (BA.isEnabled()) { 
      showEnabled(); 
     } else { 
      showDisabled(); 
     } 
    } 
    IntentFilter filter = new IntentFilter(); 

    filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); 
    filter.addAction(BluetoothDevice.ACTION_FOUND); 
    filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED); 
    filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); 



    registerReceiver(mReceiver, filter); 

    btnOn = (Button) findViewById(R.id.btnOn); 
    btnOff = (Button) findViewById(R.id.btnOff); 


    // Set up onClick listeners for buttons to send 1 or 0 to turn on/off LED 
    btnOff.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
      /* r = 255; 
      g = 15; 
      b = 50; 


      mConnectedThread.write("r"+Integer.toString(r)+"\n"); // Send "0" via Bluetooth 
      mConnectedThread.write("g"+Integer.toString(g)+"\n"); 
      mConnectedThread.write("b"+Integer.toString(b)+"\n");*/ 
      ConnectedThread.getInstance().write("1"); 
      Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show(); 
     } 
    }); 

    btnOn.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
      //cathode nen 1 la off, o la on 
      ConnectedThread.getInstance().write("0"); // Send "1" via Bluetooth //gui nhan ne 
      Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show(); 
     } 
    }); 

    //Get MAC address from DeviceListActivity via intent 
    // Intent intent = getIntent(); 

    //Get the MAC address from the DeviceListActivty via EXTRA 
    //address = intent.getStringExtra(DeviceListActivity.EXTRA_DEVICE_ADDRESS); 

    // MAC-address of Bluetooth module (you must edit this line) 
    address = "30:14:10:09:07:86"; 

    //create device and set the MAC address 
    BluetoothDevice device = BA.getRemoteDevice(address); 

    try { 
     btSocket = createBluetoothSocket(device); 
    } catch (IOException e) { 
     Toast.makeText(getBaseContext(), "Socket creation failed", Toast.LENGTH_LONG).show(); 
    } 
    // Establish the Bluetooth socket connection. 
    try 
    { 
     btSocket.connect(); 
    } catch (IOException e) { 
     try 
     { 
      btSocket.close(); 
     } catch (IOException e2) 
     { 
      //insert code to deal with this 
     } 
    } 

    ConnectedThread.createInstance(btSocket); 
    ConnectedThread.getInstance().start(); 
    //I send a character when resuming.beginning transmission to check device is connected 
    //If it is not an exception will be thrown in the write method and finish() will be called 

} 



private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException { 

    return device.createRfcommSocketToServiceRecord(MY_UUID); 
    //creates secure outgoing connecetion with BT device using UUID 
} 

@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(); 

    switch (id) { 
     case android.R.id.home: 
      mDrawerLayout.openDrawer(GravityCompat.START); 
      return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

public void onPause() { 
    if (BA != null) { 
     if (BA.isDiscovering()) { 
      BA.cancelDiscovery(); 
     } 
    } 

    try 
    { 
     //Don't leave Bluetooth sockets open when leaving activity 
     btSocket.close(); 
    } catch (IOException e2) { 
     //insert code to deal with this 
    } 
    super.onPause(); 

} 

@Override 
public void onDestroy() { 
    unregisterReceiver(mReceiver); 

    super.onDestroy(); 
} 

private void showEnabled() { 
    Toast.makeText(getApplicationContext(), "on", Toast.LENGTH_LONG).show(); 
    on.setText("Disable"); 
    on.setEnabled(true); 

    mPairedBtn.setEnabled(true); 
    find.setEnabled(true); 
} 

private void showDisabled() { 
    Toast.makeText(getApplicationContext(), "off", Toast.LENGTH_LONG).show(); 
    on.setText("Enable"); 
    on.setEnabled(true); 

    mPairedBtn.setEnabled(false); 
    find.setEnabled(false); 
} 

private void showUnsupported() { 
    Toast.makeText(getApplicationContext(), "Bluetooth is unsupported by this device", Toast.LENGTH_LONG).show(); 

    on.setText("Enable"); 
    on.setEnabled(false); 

    mPairedBtn.setEnabled(false); 
    find.setEnabled(false); 
} 

private void showToast(String message) { 
    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show(); 
} 

private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
    public void onReceive(Context context, Intent intent) { 
     String action = intent.getAction(); 

     if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) { 
      final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR); 

      if (state == BluetoothAdapter.STATE_ON) { 
       showToast("Enabled"); 

       showEnabled(); 
      } 
     } else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) { 
      mDeviceList = new ArrayList<BluetoothDevice>(); 

      mProgressDlg.show(); 
     } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { 
      mProgressDlg.dismiss(); 

      Intent newIntent = new Intent(MainActivity.this, DeviceListActivity.class); 

      newIntent.putParcelableArrayListExtra("device.list", mDeviceList); 

      startActivity(newIntent); 
     } else if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
      BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 

      mDeviceList.add(device); 

      showToast("Found device " + device.getName()); 
     } 
    } 
}; 

İkinci etkinlik: Burada

public class HolopickerColor extends AppCompatActivity implements ColorPicker.OnColorChangedListener { 
private TextView text; 
com.larswerkman.holocolorpicker.ColorPicker picker; 
SVBar svBar ; 
Button test; 



@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_holopicker_color); 
    picker = (ColorPicker) findViewById(R.id.picker); 
    svBar = (SVBar) findViewById(R.id.svbar); 

    text = (TextView) findViewById(R.id.color1); 

    picker.addSVBar(svBar); 

    picker.getColor(); 

    picker.setOnColorChangedListener(this); 

    picker.setShowOldCenterColor(false);// Tat mau cu 
    test = (Button)findViewById(R.id.test); 
    test.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

      ConnectedThread.getInstance().write("r255\n"); 
      Toast.makeText(getBaseContext(),"yes",Toast.LENGTH_LONG).show(); 
     } 
    }); 
    //ConnectedThread.getInstance().start(); 
} 


public void onColorChanged(int color) { 
    // TODO Auto-generated method stub 
    text.setTextColor(color);//hien mau len chu 
    if (ConnectedThread.getInstance() != null) { 
     int r = (color >> 16) & 0xFF;//xuat kieu mau ra thanh chu 
     int g = (color >> 8) & 0xFF; 
     int b = (color >> 0) & 0xFF; 

     // mTcpClient.sendMessage(Integer.toHexString(picker.getColor())); 

     ConnectedThread.getInstance().write("r255");//gui ko nhan ne 

ConnectedThread geçerli:

class ConnectedThread extends Thread { 
    private final BluetoothSocket mmSocket; 
    private final OutputStream mmOutStream; // cai nay e can implement Serializable nua 
    private static ConnectedThread instance = null; 

    private ConnectedThread(BluetoothSocket socket) { 
     mmSocket = socket; 
     OutputStream tmpOut = null; 

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

     mmOutStream = tmpOut; 
    } 

    public static void createInstance(BluetoothSocket socket) { 
     if (instance == null) { 
      instance = new ConnectedThread(socket); 
     } 
    } 

    public static ConnectedThread getInstance() { 
     return instance; 
    } 

    //write method 
    public void write(String input) { 
     byte[] msgBuffer = input.getBytes();   //converts entered String into bytes 
     try { 
      mmOutStream.write(msgBuffer);    //write bytes over BT connection via outstream 
     } catch (IOException e) { 
      cancel(); 

     } 
    } 

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

Answer 1

Sorun şu ki sen BluetoothSocket kullanarak ConnectedThread tekil örneğini oluştururken yani, ve sonra sen kapat Etkinliğinizin yönteminde aynı soket. Yani temel olarak, çağrıldıktan sonra ConnectedThread örneği artık hiçbir şey gönderemiyor. Bunun yerine, ConnectedThread soketini yönetmelisiniz, yani, bir referansı saklayın ve artık ihtiyacınız olmadığında veya bir sorun tespit ettiğinizde kapatın.

Bu arada, ConnectedThread numaralı telefona numaralı telefonu her kapattığınızda, cancel yönteminiz çağrılır. Bu yöntemdeki istisnaları susturmuyorsanız, sorunu kolayca algılayabilirsiniz. Bu yüzden hiçbir zaman boş bir catch bloğuna sahip olmamalısınız.