블루투스 상태(on/off) 확인 및 퍼미션 획득하여 블루투스 켜기

SDK에 있는 샘플코드(BluetoothChat)에 다 있는 내용이다.

 

onCreate()에서 다음과 같이 어댑터를 얻어오고,

   1: // Intent request codes

   2: private static final int REQUEST_ENABLE_BT = 1;

   3:

   4:  

   5: // Local Bluetooth adapter

   6: private BluetoothAdapter mBluetoothAdapter = null;

   7:  

   8: /** Called when the activity is first created. */

   9: @Override

  10: public void onCreate(Bundle savedInstanceState) {

  11:     super.onCreate(savedInstanceState);

  12:     setContentView(R.layout.main);

  13:     

  14:     // Get local Bluetooth adapter

  15:     mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

  16:  

  17:     // If the adapter is null, then Bluetooth is not supported

  18:     if (mBluetoothAdapter == null) {

  19:         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();

  20:         finish();

  21:         return;

  22:     }

  23: }

 

onStart()등에서 블루투스를 켜기 위해 startActivityForResult()를 시도.

   1: @Override

   2: public void onStart() {

   3:     super.onStart();

   4:     Log.d(LOGTAG, "++ ON START ++");

   5:  

   6:     // If BT is not on, request that it be enabled.

   7:     if (!mBluetoothAdapter.isEnabled()) {

   8:         Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

   9:         startActivityForResult(enableIntent, REQUEST_ENABLE_BT);

  10:     }

  11: }

 

onActivityResult()에서 결과 확인.

   1: public void onActivityResult(int requestCode, int resultCode, Intent data) {

   2:     Log.d(LOGTAG, "onActivityResult " + resultCode);

   3:     switch (requestCode) {

   4:     case REQUEST_ENABLE_BT:

   5:         // When the request to enable Bluetooth returns

   6:         if (resultCode == Activity.RESULT_OK) {

   7:             // Bluetooth is now enabled.

   8:             Log.d(LOGTAG, "Activity.RESULT_OK");

   9:         } else {

  10:             // User did not enable Bluetooth or an error occured

  11:             Log.d(LOGTAG, "BT not enabled");

  12:             Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();

  13:             finish();

  14:         }

  15:     }

  16: }