I'm building an Android application using Java in Android Studio that requires Bluetooth permissions to operate.
My issue is, every time I ask for the needed permissions, I get my request automatically denied. Moreover, no permission dialog shows up after making the request.
The permissions I'm requesting are BLUETOOTH_ADVERTISE
, BLUETOOTH_CONNECT
, BLUETOOTH
.
Here's the manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp">
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-feature
android:name="android.hardware.bluetooth_le"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MyApp">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Here is the build.gradle
file. I don't know whether it is important, but I include it just to be sure.
plugins {
id 'com.android.application'
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.myapp"
minSdk 23
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),
'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation "androidx.fragment:fragment:1.4.0"
implementation "androidx.activity:activity:1.4.0"
testImplementation 'junit:junit:'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
And here is the code that checks and asks for permission:
/*
Returns true if all the permissions are already granted.
Returns false if there are missing permissions.
*/
@RequiresApi(api = Build.VERSION_CODES.S)
private boolean checkPermissions() {
System.out.println("Checking permissions");
ArrayList<String> permissions = new ArrayList<>();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADVERTISE)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_ADVERTISE);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH);
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT)
== PackageManager.PERMISSION_DENIED) {
permissions.add(Manifest.permission.BLUETOOTH_CONNECT);
}
if (permissions.size() != 0) {
System.out.println("Missing the following permissions: " + permissions.toString());
requestPermissionLauncher.launch(permissions.toArray(new String[0]));
//ActivityCompat.requestPermissions(MainActivity.this, permissions.toArray(new String[0]), 0);
return false;
}
return true;
}
This is the request permission launcher that is supposed to ask for permission:
@RequiresApi(api = Build.VERSION_CODES.S)
private final ActivityResultLauncher<String[]> requestPermissionLauncher =
registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), results -> {
// Ensure all permissions have been granted
boolean isGranted = true;
for (boolean entry : results.values()) {
if (!entry) {
isGranted = false;
break;
}
}
if (isGranted) {
Toast.makeText(getApplicationContext(), "Permissions Granted", Toast.LENGTH_SHORT).show();
System.out.println("Permission granted");
} else {
Toast.makeText(getApplicationContext(), "Permissions Denied", Toast.LENGTH_SHORT).show();
System.out.println("Permission denied");
Toast.makeText(this, "You need to grant all permissions to use this application", Toast.LENGTH_LONG).show();
}
});
I've been trying to find a solution for days, but without any success. I've read about instant apps not having access to determinate permissions, but I don't think that's my case: I'm not building an instant app.
Could this issue be related to my Android device and API versions? My device is a Samsung Galaxy A5 2017 running Android version 8.0.0 (Oreo).
Thanks for your time.
The issue was a stupid error of mine. I was using permissions not available on my testing Android device.
I solved this by using BLUETOOTH_ADMIN
permission instead of BLUETOOTH_ADVERTISE
and BLUETOOTH_CONNECT
.