Сбой при запуске деятельности

Question

Я кодирую приложение для Android. Приложение начинается с главного экрана, затем нажмите кнопку, чтобы перейти к активности. У моего кода нет ошибок и сборки. Однако запуск приложения и нажатие кнопки приводит к сбою.

Мой Manifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.androidbtcontrol"> 
    <uses-permission android:name="android.permission.BLUETOOTH" /> 
    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme"> 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity android:name=".bluetoothconnect"> 
      <intent-filter> 
       <action android:name="com.example.androidbtcontrol.bluetoothconnect" /> 

       <category android:name="android.intent.category.DEFAULT" /> 
      </intent-filter> 
     </activity> 

    </application> 

</manifest> 

MainActivity.java

public void OnclickButtonListener(){ 
    button_1 = (Button)findViewById(R.id.button); 
    button_1.setOnClickListener(
      new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Intent intent = new Intent("com.example.androidbtcontrol.bluetoothconnect"); 
        startActivity(intent); 
       } 
      } 
    ); 
     } 
      } 

bluetoothconnect.java

public class bluetoothconnect extends AppCompatActivity { 

    protected void onCreate3(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_bluetoothconnect); 
    } 
    private static final int REQUEST_ENABLE_BT = 1; 

    BluetoothAdapter bluetoothAdapter; 

    ArrayList<BluetoothDevice> pairedDeviceArrayList; 

    TextView textInfo, textStatus; 
    ListView listViewPairedDevice; 
    RelativeLayout inputPane; 

    SeekBar barAnalogOut; 

    ArrayAdapter<BluetoothDevice> pairedDeviceAdapter; 
    private UUID myUUID; 
    private final String UUID_STRING_WELL_KNOWN_SPP = 
      "00001101-0000-1000-8000-00805F9B34FB"; 

    ThreadConnectBTdevice myThreadConnectBTdevice; 
    ThreadConnected myThreadConnected; 


    protected void onCreate2(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     textInfo = (TextView)findViewById(R.id.info); 
     textStatus = (TextView)findViewById(R.id.status); 
     listViewPairedDevice = (ListView)findViewById(R.id.pairedlist); 

     inputPane = (RelativeLayout) findViewById(R.id.inputpane); 

     if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)){ 
      Toast.makeText(this, 
        "FEATURE_BLUETOOTH NOT support", 
        Toast.LENGTH_LONG).show(); 
      finish(); 
      return; 
     } 

     //using the well-known SPP UUID 
     myUUID = UUID.fromString(UUID_STRING_WELL_KNOWN_SPP); 

     bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 
     if (bluetoothAdapter == null) { 
      Toast.makeText(this, 
        "Bluetooth is not supported on this hardware platform", 
        Toast.LENGTH_LONG).show(); 
      finish(); 
      return; 
     } 

     String stInfo = bluetoothAdapter.getName() + "\n" + 
       bluetoothAdapter.getAddress(); 
     textInfo.setText(stInfo); 

     barAnalogOut = (SeekBar)findViewById(R.id.analogOut); 
     barAnalogOut.setOnSeekBarChangeListener(OnAnalogOutChangeListener); 

    } 

    SeekBar.OnSeekBarChangeListener OnAnalogOutChangeListener = 
      new SeekBar.OnSeekBarChangeListener(){ 
       @Override 
       public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
        //will generate too much data sent! 
        //SendAnalogOut(progress); 
       } 

       @Override 
       public void onStartTrackingTouch(SeekBar seekBar) { 

       } 

       @Override 
       public void onStopTrackingTouch(SeekBar seekBar) { 
        SendAnalogOut(seekBar.getProgress()); 
       } 
      }; 

    private final byte SYNC_BYTE = (byte) 0xAA; 
    private final byte LENGTH_ANALOG = (byte) 3; 
    private final byte CMD_ANALOG = (byte) 1; 

    private void SendAnalogOut(int val){ 
     byte[] bytesToSend = {SYNC_BYTE, LENGTH_ANALOG, CMD_ANALOG, (byte) val}; 
     myThreadConnected.write(bytesToSend); 
    } 

    @Override 
    protected void onStart() { 
     super.onStart(); 

     //Turn ON BlueTooth if it is OFF 
     if (!bluetoothAdapter.isEnabled()) { 
      Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableIntent, REQUEST_ENABLE_BT); 
     } 

     setup(); 
    } 

    private void setup() { 
     Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices(); 
     if (pairedDevices.size() > 0) { 
      pairedDeviceArrayList = new ArrayList<BluetoothDevice>(); 

      for (BluetoothDevice device : pairedDevices) { 
       pairedDeviceArrayList.add(device); 
      } 

      pairedDeviceAdapter = new ArrayAdapter<BluetoothDevice>(this, 
        android.R.layout.simple_list_item_1, pairedDeviceArrayList); 
      listViewPairedDevice.setAdapter(pairedDeviceAdapter); 

      listViewPairedDevice.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

       @Override 
       public void onItemClick(AdapterView<?> parent, View view, 
             int position, long id) { 
        BluetoothDevice device = 
          (BluetoothDevice) parent.getItemAtPosition(position); 
        Toast.makeText(bluetoothconnect.this, 
          "Name: " + device.getName() + "\n" 
            + "Address: " + device.getAddress() + "\n" 
            + "BondState: " + device.getBondState() + "\n" 
            + "BluetoothClass: " + device.getBluetoothClass() + "\n" 
            + "Class: " + device.getClass(), 
          Toast.LENGTH_LONG).show(); 

        textStatus.setText("start ThreadConnectBTdevice"); 
        myThreadConnectBTdevice = new ThreadConnectBTdevice(device); 
        myThreadConnectBTdevice.start(); 
       } 
      }); 
     } 
    } 

    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 

     if(myThreadConnectBTdevice!=null){ 
      myThreadConnectBTdevice.cancel(); 
     } 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if(requestCode==REQUEST_ENABLE_BT){ 
      if(resultCode == Activity.RESULT_OK){ 
       setup(); 
      }else{ 
       Toast.makeText(this, 
         "BlueTooth NOT enabled", 
         Toast.LENGTH_SHORT).show(); 
       finish(); 
      } 
     } 
    } 

    //Called in ThreadConnectBTdevice once connect successed 
    //to start ThreadConnected 
    private void startThreadConnected(BluetoothSocket socket){ 

     myThreadConnected = new ThreadConnected(socket); 
     myThreadConnected.start(); 
    } 

    /* 
    ThreadConnectBTdevice: 
    Background Thread to handle BlueTooth connecting 
    */ 
    private class ThreadConnectBTdevice extends Thread { 

     private BluetoothSocket bluetoothSocket = null; 
     private final BluetoothDevice bluetoothDevice; 


     private ThreadConnectBTdevice(BluetoothDevice device) { 
      bluetoothDevice = device; 

      try { 
       bluetoothSocket = device.createRfcommSocketToServiceRecord(myUUID); 
       textStatus.setText("bluetoothSocket: \n" + bluetoothSocket); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 

     @Override 
     public void run() { 
      ToggleButton toggle = (ToggleButton) findViewById(R.id.toggleButton); 
      toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 
       public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
        if (isChecked) { 
         SendAnalogOut(0); 
         // The toggle is enabled 
        } else { 
         SendAnalogOut(255); 
         // The toggle is disabled 
        } 
       } 
      }); 
      boolean success = false; 
      try { 
       bluetoothSocket.connect(); 
       success = true; 
      } catch (IOException e) { 
       e.printStackTrace(); 

       final String eMessage = e.getMessage(); 
       runOnUiThread(new Runnable() { 

        @Override 
        public void run() { 
         textStatus.setText("Something wrong BluetoothSocket.connect(): \n" + eMessage); 
        } 
       }); 

       try { 
        bluetoothSocket.close(); 
       } catch (IOException e1) { 
        // TODO Auto-generated catch block 
        e1.printStackTrace(); 
       } 
      } 

      if(success){ 
       //connect successful 
       final String msgconnected = "Connect Successful:\n" 
         + "BluetoothSocket: " + bluetoothSocket + "\n" 
         + "BluetoothDevice: " + bluetoothDevice; 

       runOnUiThread(new Runnable(){ 

        @Override 
        public void run() { 
         textStatus.setText(msgconnected); 

         listViewPairedDevice.setVisibility(View.GONE); 
         inputPane.setVisibility(View.VISIBLE); 
        }}); 

       startThreadConnected(bluetoothSocket); 
      }else{ 
       //fail 
      } 
     } 

     public void cancel() { 

      Toast.makeText(getApplicationContext(), 
        "close bluetoothSocket", 
        Toast.LENGTH_LONG).show(); 

      try { 
       bluetoothSocket.close(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      }  
     }  
    } 

    /* 
    ThreadConnected: 
    Background Thread to handle Bluetooth data communication 
    after connected 
    */ 
    private class ThreadConnected extends Thread { 
     private final BluetoothSocket connectedBluetoothSocket; 
     private final InputStream connectedInputStream; 
     private final OutputStream connectedOutputStream; 

     public ThreadConnected(BluetoothSocket socket) { 
      connectedBluetoothSocket = socket; 
      InputStream in = null; 
      OutputStream out = null; 

      try { 
       in = socket.getInputStream(); 
       out = socket.getOutputStream(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

      connectedInputStream = in; 
      connectedOutputStream = out; 
     } 

     @Override 
     public void run() { 
      byte[] buffer = new byte[1024]; 
      int bytes; 

      while (true) { 
       try { 
        bytes = connectedInputStream.read(buffer); 
        String strReceived = new String(buffer, 0, bytes); 
        final String msgReceived = String.valueOf(bytes) + 
          " bytes received:\n" 
          + strReceived; 

        runOnUiThread(new Runnable() { 

         @Override 
         public void run() { 
          textStatus.setText(msgReceived); 

         }}); 

       } catch (IOException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 

        final String msgConnectionLost = "Connection lost:\n" 
          + e.getMessage(); 
        runOnUiThread(new Runnable(){ 

         @Override 
         public void run() { 
          textStatus.setText(msgConnectionLost); 
         }}); 
       } 
      } 
     } 

     public void write(byte[] buffer) { 
      try { 
       connectedOutputStream.write(buffer); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 

     public void cancel() { 
      try { 
       connectedBluetoothSocket.close(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    } 
} 

Главная Схема:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:orientation="vertical" 
    tools:context=".MainActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center_horizontal" 
     android:autoLink="web" 
     android:text="Please Choose " 
     android:textStyle="bold" /> 

    <Button 
     android:text="Button" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/button" /> 
</LinearLayout> 

активность Компоновка

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/activity_bluetoothconnect" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.example.androidbtcontrol.bluetoothconnect"> 
    <TextView 
     android:id="@+id/info" 
     android:textStyle="bold|italic" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 

    <TextView 
     android:id="@+id/status" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"/> 

    <ListView 
     android:id="@+id/pairedlist" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"/> 

    <RelativeLayout 
     android:id="@+id/inputpane" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:visibility="gone"> 
    </RelativeLayout> 

    <SeekBar 
     android:id="@+id/analogOut" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:max="99" 
     android:progress="0"/> 

    <ToggleButton 
     android:text="ToggleButton" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/toggleButton" />  

</RelativeLayout> 

Answer 1

Вот некоторые из ошибок, которые я могу запятнать от информации, которую вы дали. Опубликуйте детали исключения журнала, чтобы я мог уточнить это решение.

1) Не используйте свою собственную версию onCreate (в bluetoothactivity). Активность должна иметь только один onCreate. Вам также необходимо добавить префикс @Override к методу onCreate. Код, который у вас есть onCreate2 и onCreate3 методы, которые являются ошибочными. Это может быть причиной сбоя, так как при вызове активности bluetooth он не может найти метод onCreate.

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

    //Keep your bluetooth related functionality here. 


} 

2) При запуске ваших намерений, вы должны указать источник и адресат тоже.

Intent intent = new Intent(CallingActivity.this,CalledActivity.class); 
startActivity(intent); 

Answer 2

Ваш аварии может быть вызван из-за ваше намерение, в деятельности

Intent intent = new Intent("com.example.androidbtcontrol.bluetoothconnect"); 
       startActivity(intent); 

правильного путь

Intent intent=new Intent(firstactivity.this,secondactivity.class); 
startactivity(intent); 

вам необходимо указать адресат