前言
最近在做一個配置工具，給Zigbee網(wǎng)關配置網(wǎng)絡的工具，其中有一個環(huán)節(jié)，是用藍牙配置，過程遇到權限各種坑，故有此篇文章，其中我們使用了第三方庫permission_handler,而且permission_handler版本要大于8.2.0才行。
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Android端
第一步：工程名稱/android/app/src/main/AndroidManifest.xml,下添加以下權限
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代碼如下：
<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,只需要授權位置權限，下面這些都是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=$isBleAdvertiseGranted');
在>=Android12的版本,除了需要授權“位置權限”，還需要授權“使用附近的設備權限” ，下面這些才會都是PermissionStatus.granted，藍牙才能正常使用起來
var isBleScanGranted = await Permission.bluetoothScan.request();
print('checkBlePermissions, isBleScanGranted=$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();默認為PermissionStatus.denied，應該是因為使用了上面3個權限代替了
第二步，動態(tài)申請權限最終代碼
其中投機取巧了一下
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=$isBleAdvertiseGranted');
if(Platform.isIOS) {
return isBleGranted == PermissionStatus.granted;
}else {
return isLocationGranted == PermissionStatus.granted &&
// isBleGranted == PermissionStatus.granted &&
isBleScanGranted == PermissionStatus.granted &&
isBleConnectGranted == PermissionStatus.granted &&
isBleAdvertiseGranted == PermissionStatus.granted;
}
}
iOS端
第一步：info.plist文件申請
image.png
第二步：增加后臺模式權限
image.png
如下圖所示，選中
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第三步：Podfile文件里面添加代碼
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代碼如下：
target.build_configurations.each do |config|
config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
'$(inherited)',
# dart: [PermissionGroup. location, PermissionGroup. locationAlways, PermissionGroup. locationWhenInUse]
'PERMISSION_LOCATION=1',
## dart: PermissionGroup.bluetooth
'PERMISSION_BLUETOOTH=1',
]
end
第四步：Podfile文件里面添加代碼后，需要重新pod install，安裝一下,才會產(chǎn)生效果
第五步：在代碼里面調(diào)用藍牙權限
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;
}
}
最終效果
兩端都可以彈框出來申請權限，授受后，可以正常使用起來，還適配了Android12，
如果沒有適配Android12的代碼，一開始藍牙掃描，app就會崩潰
結尾
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