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public class ControllActivity extends Activity 
{
 
	BluetoothDevice device;
	private static final UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
	BluetoothSocket socket;
	OutputStream output;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_controll);
 
		Intent intent = getIntent();
		device = intent.getParcelableExtra("device");
	}	
 
	public void doConnect(View view)
	{
		Thread t = new Thread()
		{
			public void run()
			{
				try {
					socket = device.createRfcommSocketToServiceRecord(uuid);
					socket.connect();
					output = socket.getOutputStream();
					Log.e("MainActivity", "成功");
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					Log.e("MainActivity", "失敗"+e.getMessage());
				}
			}
		};
		t.start();
	}
}

Main.java:1: error: class ControllActivity is public, should be declared in a file named ControllActivity.java
public class ControllActivity extends Activity 
       ^
Main.java:1: error: cannot find symbol
public class ControllActivity extends Activity 
                                      ^
  symbol: class Activity
Main.java:4: error: cannot find symbol
	BluetoothDevice device;
	^
  symbol:   class BluetoothDevice
  location: class ControllActivity
Main.java:5: error: cannot find symbol
	private static final UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
	                     ^
  symbol:   class UUID
  location: class ControllActivity
Main.java:6: error: cannot find symbol
	BluetoothSocket socket;
	^
  symbol:   class BluetoothSocket
  location: class ControllActivity
Main.java:7: error: cannot find symbol
	OutputStream output;
	^
  symbol:   class OutputStream
  location: class ControllActivity
Main.java:9: error: cannot find symbol
	protected void onCreate(Bundle savedInstanceState) {
	                        ^
  symbol:   class Bundle
  location: class ControllActivity
Main.java:17: error: cannot find symbol
	public void doConnect(View view)
	                      ^
  symbol:   class View
  location: class ControllActivity
Main.java:5: error: cannot find symbol
	private static final UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
	                                 ^
  symbol:   variable UUID
  location: class ControllActivity
Main.java:8: error: method does not override or implement a method from a supertype
	@Override
	^
Main.java:10: error: cannot find symbol
		super.onCreate(savedInstanceState);
		^
  symbol:   variable super
  location: class ControllActivity
Main.java:11: error: package R does not exist
		setContentView(R.layout.activity_controll);
		                ^
Main.java:13: error: cannot find symbol
		Intent intent = getIntent();
		^
  symbol:   class Intent
  location: class ControllActivity
Main.java:13: error: cannot find symbol
		Intent intent = getIntent();
		                ^
  symbol:   method getIntent()
  location: class ControllActivity
Main.java:27: error: cannot find symbol
					Log.e("MainActivity", "??");
					^
  symbol: variable Log
Main.java:28: error: cannot find symbol
				} catch (IOException e) {
				         ^
  symbol: class IOException
Main.java:31: error: cannot find symbol
					Log.e("MainActivity", "??"+e.getMessage());
					^
  symbol: variable Log
17 errors

Standard output is empty