android蓝牙是否开启蓝牙设备,Android蓝牙开发怎么检查远程蓝牙设备是否打开?

通过下面的代码判断蓝牙是否链接：

BluetoothHeadset mBluetoothHeadset;

// Get the default adapter

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter。

getDefaultAdapter();

// Establish connection to the proxy。

mBluetoothAdapter。getProfileProxy(context, mProfileListener, BluetoothProfile。

HEADSET);

// Define Service Listener of BluetoothProfile

private BluetoothProfile。ServiceListener mProfileListener = new BluetoothProfile。

ServiceListener() {

public void onServiceConnected(int profile, BluetoothProfile proxy) {

if (profile == BluetoothProfile。

HEADSET) {

mBluetoothHeadset = (BluetoothHeadset) proxy;

}

}

public void onServiceDisconnected(int profile) {

if (profile == BluetoothProfile。

HEADSET) {

mBluetoothHeadset = null;

}

}

};

//call functions on mBluetoothHeadset to check if Bluetooth SCO audio is connected。

List devices = mBluetoothHeadset。getConnectedDevices();

for ( final BluetoothDevice dev : devices ) {

return mBluetoothHeadset。

isAudioConnected(dev);

}

// finally Close proxy connection after use。

mBluetoothAdapter。closeProfileProxy(mBluetoothHeadset);。

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