android - 检测蓝牙发现是否开启？

Question

我想检测蓝牙发现是否开启？可能吗？

Intent discoverableIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 1);
startActivity(discoverableIntent);

以上代码是关于启用/禁用蓝牙光盘状态，但不显示蓝牙迪斯科状态

Answer 1

要确定蓝牙设备是否可发现(处于查询扫描状态)，请使用 getScanMode()，如下所示:

BluetoothAdapter bAdapter = BluetoothAdapter.getDefaultAdapter();
if(bAdapter.getScanMode() == BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
    // device is discoverable & connectable
} else {
    // device is not discoverable & connectable
}

Documentation of getScanMode() :

int android.bluetooth.BluetoothAdapter.getScanMode()

Get the current Bluetooth scan mode of the local Bluetooth adapter.

The Bluetooth scan mode determines if the local adapter is connectable and/or discoverable from remote Bluetooth devices.