Android开发实现实时检测蓝牙连接状态的方法【附源码下载】

Switch switchTest = (Switch) findViewById(R.id.switch1);switchTest.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {  if (isChecked) {   mBluetoothAdapter.enable();//打开蓝牙  } else {   mBluetoothAdapter.disable();// 关闭蓝牙  } }});

Button btn = (Button) findViewById(R.id.button);btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) {  Toast.makeText(MainActivity.this, "bluetooth is " +bluetoothStatus,    Toast.LENGTH_SHORT).show(); }});

<uses-permission android:name="android.permission.BLUETOOTH"/><uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

//注册蓝牙监听mContext.registerReceiver(mReceiver, makeFilter());//注销蓝牙监听//mContext.unregisterReceiver(mReceiver);private IntentFilter makeFilter() {  IntentFilter filter = new IntentFilter();  filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);  return filter;}private BroadcastReceiver mReceiver = new BroadcastReceiver() {  @Override  public void onReceive(Context context, Intent intent) {   switch (intent.getAction()) {    case BluetoothAdapter.ACTION_STATE_CHANGED:     int blueState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 0);     switch (blueState) {      case BluetoothAdapter.STATE_TURNING_ON:       Log.e("TAG", "TURNING_ON");       break;      case BluetoothAdapter.STATE_ON:       bluetoothStatus="on";       Log.e("TAG", "STATE_ON");       break;      case BluetoothAdapter.STATE_TURNING_OFF:       Log.e("TAG", "STATE_TURNING_OFF");       break;      case BluetoothAdapter.STATE_OFF:       bluetoothStatus="off";       Log.e("TAG", "STATE_OFF");       break;     }     break;   }  }};