蓝牙是我们应用程序的主要依赖项。因此，我们已经尝试实施新的Android 12蓝牙权限。我们唯一的资源是Android开发者在Android 12中新增的蓝牙权限。它只说需要添加以下权限:
"android.permission.BLUETOOTH_CONNECT"
"android.permission.BLUETOOTH_SCAN"
我添加了这些权限，并获取了运行时权限，当然还有位置（与 Android 12 之前版本一样）。我的代码库中没有其他更改。这是否应该？我不知道。所以，问题是我的应用程序找不到BLE设备。我找不到原因。
你有任何建议或资源吗？
100%工作解决方案：无需任何第三方插件
清单代码:
<!--BLUETOOTH PERMISSION-->
<!-- Request legacy Bluetooth permissions on older devices. -->
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<!-- Needed only if your app looks for Bluetooth devices.
If your app doesn't use Bluetooth scan results to derive physical
location information, you can strongly assert that your app
doesn't derive physical location. -->
<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" />
<!--bibo01 : hardware option-->
<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
<uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
requestMultiplePermissions.launch(arrayOf(
Manifest.permission.BLUETOOTH_SCAN,
Manifest.permission.BLUETOOTH_CONNECT))
}
else{
val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
requestBluetooth.launch(enableBtIntent)
}
....................................................
private var requestBluetooth = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
if (result.resultCode == RESULT_OK) {
//granted
}else{
//deny
}
}
private val requestMultiplePermissions =
registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
permissions.entries.forEach {
Log.d("test006", "${it.key} = ${it.value}")
}
}
了解更多信息： https://developer.android.com/guide/topics/connectivity/bluetooth/permissions
这对我有用，
在清单文件中添加以下权限：
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
在执行蓝牙功能之前，请检查权限：
//--------------------------Java--------------------------
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) == PackageManager.PERMISSION_DENIED)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
{
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.BLUETOOTH_CONNECT}, 2);
return;
}
}
//--------------------------Kotlin--------------------------
if (ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.BLUETOOTH_CONNECT) == PackageManager.PERMISSION_DENIED)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
{
ActivityCompat.requestPermissions(this@MainActivity, arrayOf(Manifest.permission.BLUETOOTH_CONNECT), 2)
return
}
}
举个例子，
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) == PackageManager.PERMISSION_DENIED) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.BLUETOOTH_CONNECT}, 2);
return;
}
}
mBTSocket.connect();
我刚刚添加到清单中：
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
接着我像其他应用一样从主要活动中请求了这些权限。
为了请求权限，我正在使用库。
implementation 'pub.devrel:easypermissions:3.0.0'
那么你只需要调用这个函数
public static final String[] BLUETOOTH_PERMISSIONS_S = { Manifest.permission.BLUETOOTH_SCAN, Manifest.permission.BLUETOOTH_CONNECT} ;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
if (!EasyPermissions.hasPermissions(this, BLUETOOTH_PERMISSIONS_S)) {
EasyPermissions.requestPermissions(this, message, yourRequestCode,BLUETOOTH_PERMISSIONS_S);
}
}
并重写 onRequestPermissionResult
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
Jetpack Compose更新说明
如果您正在使用Jetpack Compose，您可以按照以下方式处理：
在rememberMultiplePermissionState函数内创建一个权限列表。
rememberMultiplePermissionsState(
permissions = listOf(
Manifest.permission.BLUETOOTH_CONNECT,
Manifest.permission.BLUETOOTH_SCAN
)
)
然后观察生命周期事件，并在恢复时启动权限请求。
val lifecycleOwner = LocalLifecycleOwner.current
DisposableEffect(key1 = lifecycleOwner,
effect = {
val observer = LifecycleEventObserver { _, event ->
if(event == Lifecycle.Event.ON_START) {
permissionsState.launchMultiplePermissionRequest()
}
}
lifecycleOwner.lifecycle.addObserver(observer)
onDispose {
lifecycleOwner.lifecycle.removeObserver(observer)
}
})
观察权限状态
permissionsState.permissions.forEach { permissionState ->
when(permissionState.permission) {
Manifest.permission.ACCESS_FINE_LOCATION -> {
when {
permissionState.hasPermission -> {}
}
}
}
}
}
easypermissions而不是Android SDK？ - IgorGanapolskyON_START而不是ON_RESUME？ - the_prole这个问题出现在Android 12和Android 13中。在我的情况下，添加新的权限不能解决问题：我已经为蓝牙和WiFi设置了所有相关权限：
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE"/>
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
<uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"
android:maxSdkVersion="32" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.NEARBY_WIFI_DEVICES"
android:usesPermissionFlags="neverForLocation" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
BLUETOOTH_ADMIN已经添加了。即使加了这个权限也无法正常工作。 - Mustafa Kuloğlu<uses-permission android:name="android.permission.BLUETOOTH_SCAN"
android:usesPermissionFlags="neverForLocation"
tools:targetApi="s"/>
startAdvertising时，在我的条件中添加了checkSelfPermission(Manifest.permission.BLUETOOTH) == PackageManager.PERMISSION_GRANTED。MainActivity.cs文件中的OnCreate，以便它可以在运行时获取权限。private const int REQUEST_FINE_LOCATION_PERMISSION = 100;
private const int REQUEST_BLUETOOTH_SCAN_PERMISSION = 101;
private const int REQUEST_BACKGROUND_LOCATION_PERMISSION = 102;
private const int REQUEST_BLUETOOTH_CONNECT_PERMISSION= 103;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
RequestedOrientation = ScreenOrientation.Portrait;
// Request the ACCESS_FINE_LOCATION permission at runtime
if (CheckSelfPermission(Manifest.Permission.AccessFineLocation) != Permission.Granted)
{
RequestPermissions(new string[] { Manifest.Permission.AccessFineLocation },
REQUEST_FINE_LOCATION_PERMISSION);
}
if (CheckSelfPermission(Manifest.Permission.AccessBackgroundLocation) != Permission.Granted)
{
RequestPermissions(new string[] { Manifest.Permission.AccessBackgroundLocation },
REQUEST_BACKGROUND_LOCATION_PERMISSION);
}
// Request the BLUETOOTH_SCAN permission at runtime
if (CheckSelfPermission(Manifest.Permission.BluetoothScan) != Permission.Granted)
{
RequestPermissions(new string[] { Manifest.Permission.BluetoothScan },
REQUEST_BLUETOOTH_SCAN_PERMISSION);
}
//Request the BLUETOOTH_CONNECT permission at runtime
if (CheckSelfPermission(Manifest.Permission.BluetoothConnect) != Permission.Granted)
{
RequestPermissions(new string[] { Manifest.Permission.BluetoothConnect },
REQUEST_BLUETOOTH_CONNECT_PERMISSION);
}
}
我添加了运行时权限后，它开始在 Android 13 上工作。
我不确定他们是否宣布了有关蓝牙更改的任何内容，但如果没有其他帮助，他们最近引入了这个功能，可能会在您的用例中有所帮助，除非您做更复杂的事情。
https://developer.android.com/guide/topics/connectivity/companion-device-pairing#kotlin
在较新的版本中，如果您所需的所有功能都可以完成，则不再需要位置权限。.setNamePattern(Pattern.compile("My device"))
.addServiceUuid(ParcelUuid(UUID(0x123abcL, -1L)), null)
我用它来搜索设备没有任何问题，连接方式类似
以下方法对我有效：
[AndroidManifest.xml]
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
[MainActivity.java]
private static final String[] PERMISSIONS = new String[]{Manifest.permission.BLUETOOTH_CONNECT, Manifest.permission.BLUETOOTH_ADVERTISE };
_
public void getPermissionFromUser()
{
if(BA == null){
BA = BluetoothAdapter.getDefaultAdapter();
}
int i=0;
for(String permission : PERMISSIONS){
String title = "bluetooth permission needed";
String msg="";
if(i==0){
msg = "Give the app permission to use Bluetooth";
}else if(i==1) {
msg = "Give permission to search for the current device on other Bluetooth devices";
}
if (ActivityCompat.checkSelfPermission(MainActivity.this, PERMISSIONS[i]) == PackageManager.PERMISSION_DENIED) {
int finalI = i;
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle(title);
builder.setMessage(msg);
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialogInterface) {
requestPermissions(new String[]{PERMISSIONS[finalI]}, 3);
}
});
builder.show();
}
i++;
}
}