Some Android phones cannot get BLUETOOTH permission while running

[fuhongbing134]

Problem summary

Hi, I use this library when I develop a flutter app. When I use BluetoothConnection.toAddress() to connect a device on XIAOMI, I get a message like this: "lacks permission android.permission.BLUETOOTH". However, I do not meet the same problem on other phones. I met this problem on XIAOMI(Android 12) while the app can run as I want on OPPO(Android 12) and some other phones(Android 10, Android 11) even another XIAOMI(Android 10).

compileSdkVersion and targetSdkVersion are 31

The permission in AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION"/>

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
<uses-permission android:name="android.permission.BLUETOOTH_SCAN"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE"/>

The request of the permission

DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();

if(Platform.isAndroid) {
  AndroidDeviceInfo androidInfo  = await deviceInfo.androidInfo;
  if(androidInfo.version.sdkInt >= 31) {
    await [Permission.bluetoothConnect, Permission.bluetoothScan , Permission.bluetoothAdvertise, Permission.location].request();
  } else {
    await [Permission.bluetooth, Permission.location].request();
} else {
  print('ios not yet supported');
}

Environment

Flutter assets will be downloaded from https://storage.flutter-io.cn. Make sure you trust this source! [√] Flutter (Channel stable, 2.10.3, on Microsoft Windows [Version 10.0.19043.1706], locale zh-CN) • Flutter version 2.10.3 at F:\flutter_windows\flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision 7e9793dee1 (3 months ago), 2022-03-02 11:23:12 -0600 • Engine revision bd539267b4 • Dart version 2.16.1 • DevTools version 2.9.2 • Pub download mirror https://pub.flutter-io.cn • Flutter download mirror https://storage.flutter-io.cn

[√] Android toolchain - develop for Android devices (Android SDK version 31.0.0) • Android SDK at C:\Users\PC\AppData\Local\Android\sdk • Platform android-31, build-tools 31.0.0 • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java • Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822) • All Android licenses accepted.

[√] Chrome - develop for the web • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[!] Visual Studio - develop for Windows (Visual Studio Community 2017 15.9.37) • Visual Studio at G:\Microsoft Visual Studio\2017\Community • Visual Studio Community 2017 version 15.9.28307.1585 • Windows 10 SDK version 10.0.20348.0 X Visual Studio 2019 or later is required. Download at https://visualstudio.microsoft.com/downloads/. Please install the "Desktop development with C++" workload, including all of its default components

[√] Android Studio (version 2021.1) • Android Studio at C:\Program Files\Android\Android Studio • Flutter plugin can be installed from: https://plugins.jetbrains.com/plugin/9212-flutter • Dart plugin can be installed from: https://plugins.jetbrains.com/plugin/6351-dart • Java version OpenJDK Runtime Environment (build 11.0.11+9-b60-7590822)

[√] VS Code (version 1.67.0) • VS Code at C:\Users\PC\AppData\Local\Programs\Microsoft VS Code • Flutter extension version 3.40.0

[√] Connected device (3 available) • Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19043.1706] • Chrome (web) • chrome • web-javascript • Google Chrome 101.0.4951.67 • Edge (web) • edge • web-javascript • Microsoft Edge 101.0.1210.47

[!] HTTP Host Availability X HTTP host https://maven.google.com/ is not reachable. Reason: An error occurred while checking the HTTP host: timeout

[aaronchen96]

Hi Fuhongbing, may i know did u found a way to fix this error?

[dungnt1572000]

Hi Fuhongbing, this bug happened in Android 12 version because some permission is runtime Permission. you can check some PR relate to Android 12 to resolve it.