Android蓝牙权限的判断

经常要用到，所以记录下来

/**
 * 请求权限的Code
 */
public static final int REQUEST_PERMISSION_CODE = 1500;

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_PERMISSION_CODE) {
        checkPermission();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == REQUEST_PERMISSION_CODE) {
        checkPermission();
    }
}

/**
 * 检查权限
 */
private void checkPermission() {
    // 没有打开蓝牙就请求打开蓝牙
    if (!hasBluetooth()) {
        requestBluetooth();
        return;
    }
    // 没有定位权限就请求定位权限
    if (!hasLocationPermission()) {
        requestLocationPermission(this);
        return;
    }
    // 没有定位服务就请求定位服务
    if (!hasLocationService()) {
        requestLocationService();
        return;
    }
    // 权限都有了，OK
    // TODO
}

/**
 * 是否有定位权限
 *
 * @return boolean
 */
private boolean hasLocationPermission() {
    return ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;
}

/**
 * 蓝牙是否打开
 *
 * @return boolean
 */
private boolean hasBluetooth() {
    return BluetoothAdapter.getDefaultAdapter().isEnabled();
}

/**
 * 定位服务是否打开
 *
 * @return boolean
 */
private boolean hasLocationService() {
    LocationManager locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
    if (locationManager == null) {
        return false;
    }
    return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}

/**
 * 申请定位权限
 */
private void requestLocationPermission(Activity activity) {
    ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_PERMISSION_CODE);
}

/**
 * 申请打开蓝牙
 */
private void requestBluetooth() {
    Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(intent, REQUEST_PERMISSION_CODE);
}

/**
 * 申请打开定位服务
 */
private void requestLocationService() {
    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
    startActivityForResult(intent, REQUEST_PERMISSION_CODE);
}