前言
最近在做一个配置工具，给Zigbee网关配置网络的工具，其中有一个环节，是用蓝牙配置，过程遇到权限各种坑，故有此篇文章，其中我们使用了第三方库permission_handler,而且permission_handler版本要大于8.2.0才行。
image.png
Android端
第一步：工程名称/android/app/src/main/AndroidManifest.xml,下添加以下权限
image.png
代码如下：
<uses-permission android:name="android.permission.INTERNET" />
<!-- Request legacy Bluetooth permissions on older devices. -->
<uses-permission android:name="android.permission.BLUETOOTH"
android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"
android:maxSdkVersion="30" />
<!-- Needed only if your app looks for Bluetooth devices.
You must add an attribute to this permission, or declare the
ACCESS_FINE_LOCATION permission, depending on the results when you
check location usage in your app. -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<!-- Needed only if your app makes the device discoverable to Bluetooth
devices. -->
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<!-- Needed only if your app communicates with already-paired Bluetooth
devices. -->
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
在Android12之前的版本,只需要授权位置权限，下面这些都是PermissionStatus.granted
var isLocationGranted = await Permission.locationWhenInUse.request();
print('checkBlePermissions, isLocationGranted=$isLocationGranted');
var isBleGranted = await Permission.bluetooth.request();
print('checkBlePermissions, isBleGranted=$isBleGranted');
var isBleScanGranted = await Permission.bluetoothScan.request();
print('checkBlePermissions, isBleScanGranted=$isBleScanGranted');
//
var isBleConnectGranted = await Permission.bluetoothConnect.request();
print('checkBlePermissions, isBleConnectGranted=$isBleConnectGranted');
//
var isBleAdvertiseGranted = await Permission.bluetoothAdvertise.request();
print('checkBlePermissions, isBleAdvertiseGranted=$isBleAdvertiseGranted');
在>=Android12的版本,除了需要授权“位置权限”，还需要授权“使用附近的设备权限” ，下面这些才会都是PermissionStatus.granted，蓝牙才能正常使用起来
var isBleScanGranted = await Permission.bluetoothScan.request();
print('checkBlePermissions, isBleScanGranted=$isBleScanGranted');
//
var isBleConnectGranted = await Permission.bluetoothConnect.request();
print('checkBlePermissions, isBleConnectGranted=$isBleConnectGranted');
//
var isBleAdvertiseGranted = await Permission.bluetoothAdvertise.request();
print('checkBlePermissions, isBleAdvertiseGranted=$isBleAdvertiseGranted');
需要注意的是：在>=Android12的版本, var isBleGranted = await Permission.bluetooth.request();默认为PermissionStatus.denied，应该是因为使用了上面3个权限代替了
第二步，动态申请权限最终代码
其中投机取巧了一下
Future<bool> requestBlePermissions() async {
location.Location _location = new location.Location();
bool _serviceEnabled;
_serviceEnabled = await _location.serviceEnabled();
if (!_serviceEnabled) {
_serviceEnabled = await _location.requestService();
if (!_serviceEnabled) {
return false;
}
}
var isLocationGranted = await Permission.locationWhenInUse.request();
print('checkBlePermissions, isLocationGranted=$isLocationGranted');
var isBleGranted = await Permission.bluetooth.request();
print('checkBlePermissions, isBleGranted=$isBleGranted');
var isBleScanGranted = await Permission.bluetoothScan.request();
print('checkBlePermissions, isBleScanGranted=$isBleScanGranted');
//
var isBleConnectGranted = await Permission.bluetoothConnect.request();
print('checkBlePermissions, isBleConnectGranted=$isBleConnectGranted');
//
var isBleAdvertiseGranted = await Permission.bluetoothAdvertise.request();
print('checkBlePermissions, isBleAdvertiseGranted=$isBleAdvertiseGranted');
if(Platform.isIOS) {
return isBleGranted == PermissionStatus.granted;
}else {
return isLocationGranted == PermissionStatus.granted &&
// isBleGranted == PermissionStatus.granted &&
isBleScanGranted == PermissionStatus.granted &&
isBleConnectGranted == PermissionStatus.granted &&
isBleAdvertiseGranted == PermissionStatus.granted;
}
}
iOS端
第一步：info.plist文件申请
image.png
第二步：增加后台模式权限
image.png
如下图所示，选中
image.png
第三步：Podfile文件里面添加代码
image.png
代码如下：
target.build_configurations.each do |config|
config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
'$(inherited)',
# dart: [PermissionGroup. location, PermissionGroup. locationAlways, PermissionGroup. locationWhenInUse]
'PERMISSION_LOCATION=1',
## dart: PermissionGroup.bluetooth
'PERMISSION_BLUETOOTH=1',
]
end
第四步：Podfile文件里面添加代码后，需要重新pod install，安装一下,才会产生效果
第五步：在代码里面调用蓝牙权限
image.png
Future<bool> requestBlePermissions() async {
location.Location _location = new location.Location();
bool _serviceEnabled;
_serviceEnabled = await _location.serviceEnabled();
if (!_serviceEnabled) {
_serviceEnabled = await _location.requestService();
if (!_serviceEnabled) {
return false;
}
}
var isLocationGranted = await Permission.locationWhenInUse.request();
print('checkBlePermissions, isLocationGranted=$isLocationGranted');
var isBleGranted = await Permission.bluetooth.request();
print('checkBlePermissions, isBleGranted=$isBleGranted');
var isBleScanGranted = await Permission.bluetoothScan.request();
print('checkBlePermissions, isBleScanGranted=$isBleScanGranted');
//
var isBleConnectGranted = await Permission.bluetoothConnect.request();
print('checkBlePermissions, isBleConnectGranted=$isBleConnectGranted');
//
var isBleAdvertiseGranted = await Permission.bluetoothAdvertise.request();
print('checkBlePermissions, isBleAdvertiseGranted=$isBleAdvertiseGranted');
if(Platform.isIOS) {
return isBleGranted == PermissionStatus.granted;
}else {
return isLocationGranted == PermissionStatus.granted &&
// isBleGranted == PermissionStatus.granted &&
isBleScanGranted == PermissionStatus.granted &&
isBleConnectGranted == PermissionStatus.granted &&
isBleAdvertiseGranted == PermissionStatus.granted;
}
}
最终效果
两端都可以弹框出来申请权限，授受后，可以正常使用起来，还适配了Android12，
如果没有适配Android12的代码，一开始蓝牙扫描，app就会崩溃
结尾
今天flutter 相关技术的分享就到这里喽，小伴们,觉得有点用的话，或者已经看到这里面来的请点赞加关注吧~~ 后续分享更多有关flutter及移动端原生相关文章。如果有疑问的话，请在下方留言~
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