Develop Reference

What permission do we need to use instead of WRITE_EXTERNAL_STORAGE in Android 13 app on Android 13 device?

What permission do we need to use instead of WRITE_EXTERNAL_STORAGE in Android 13 app on Android 13 device? I have read through the documentation but not able to get what permission we need to use. The function which needs this is a photo picker which access the images, before it used to ask for permission on Android 12, but once the app was upgraded to Android 13 and used on an Android 13 app, the photo picker stopped working. It uses the permission WRITE_EXTERNAL_STORAGE which is not required anymore. But what needs to be used instead of this?
The function is from a library - react-native-image-crop-picker
#ReactMethod
public void openPicker(final ReadableMap options, final Promise promise) {
final Activity activity = getCurrentActivity();
if (activity == null) {
promise.reject(E_ACTIVITY_DOES_NOT_EXIST, "Activity doesn't exist");
return;
}
setConfiguration(options);
resultCollector.setup(promise, multiple);
initiatePicker(activity);
permissionsCheck(activity, promise, Collections.singletonList(Manifest.permission.WRITE_EXTERNAL_STORAGE), new Callable<Void>() {
#Override
public Void call() {
return null;
}
});
}

Use react-native-permissions for managing the permissions.
The docs are quite simple, kindly go through this.

Some permission changes were required for this in the react-native-image-cropper library - https://github.com/ivpusic/react-native-image-crop-picker/pull/1852

How to check if user has given camera or location permissions (android) UNITY

I really struggle with this since a while :( as I need an solution that works within UNITY3D.
I need to check if the user has given the permission to access the Android device camera (and location on a second level).
Normally the app start by asking for this permissions at launch, but if the user denies the access for the camera I need to know and check that later.
Otherwise the user could hit the camera UI button I made and try to access the camera via webcamtexture... and that leads into a crash of the app.
Since Android API 23 you cannot ignore or already grant permissions by changing the android manifest like I tried after reading several posts about that.
Thank's to everyone who has an idea to solve this.

Check this library: https://github.com/sanukin39/UniAndroidPermission
In that library I got these methods to check and request Permission.
public static void requestPermission(String permissionStr){
if(!hasPermission(permissionStr)) {
UnityPlayer.currentActivity.requestPermissions(new String[]{permissionStr}, 0);
}
}
public static boolean hasPermission(String permissionStr) {
if(Build.VERSION.SDK_INT < 23) {
return true;
}
Context context = UnityPlayer.currentActivity.getApplicationContext();
return context.checkCallingOrSelfPermission(permissionStr) == PackageManager.PERMISSION_GRANTED;
}
Hope it helps:)

Control an LED through internet

I am creating an Android app to control a LED through internet.
First I built an application using app inventor and it's working fine
as shown in this video:
https://www.youtube.com/watch?v=b-2CyGM9QNs&list=LLOG_1YPENk_YX8ypNpRgPuA&index=2
Now I am trying to build the same application using Android Studio and I am facing some problem, not getting the exact output as I got from app inventor
Here is code for the button:
public void ON(View view)
{
Intent led_on = new
Intent(Intent.ACTION_VIEW,Uri.parse("192.168.43.104/LED=ON"));
startActivity(led_on);
}
Created a button which should turn ON the led, but it's going to the webpage
How to do it without going to webpage as done in app inventor?

You don't want to start an activity when clicking on the button, but doing a GET request instead.
UPDATE:
It seems you don't care about the response of your request, so you can simply do something like:
public void ON(View view) {
HttpClient httpclient = new DefaultHttpClient();
httpclient.execute(new HttpGet("192.168.43.104/LED=ON"));
}
Make sure to have INTERNET permission in your AndroidManifest.xml:
<uses-permission android:name="android.permission.INTERNET" />

Getting image download links from owncloud server

there is not much information out there for the newbies to owncloud.. not even here in Stack Overflow, a little background on what im trying to achieve is:
-Already managed to sync my project to the owncloud library via gradlle.
- The provided examples are not of much help for me you will see why.
I use this library https://github.com/bumptech/glide to stream images URLs to some imageviews in my app, as i was on a web server I had no problem but now that I moved to owncloud, I can do the same if i provide my app with the "download link" from the stored images.
That said, what I need is to some how be able to select the owncloud stored images(access the shared folder and download) by name and or read the download link from where ever is stored..
here is the use the glide library on my project
String url = null;
if (plato.getFoto_movil().equals("churrasco.jpg"))
{
url = "http://192.168.0.20/owncloud/index.php/s/EqX7LxLpUeBCzF4/download";
}
if (plato.getFoto_movil().equals("pizza.jpg"))
{
url = "http://192.168.0.20/owncloud/index.php/s/VGQJh6ii36PLGsN/download";
}
if (plato.getFoto_movil().equals("torta_chocolate.jpg"))
{
url = "http://192.168.0.20/owncloud/index.php/s/K0TaHRMPuMrs0Fx/download";
}
Glide.with(mContext).load(url).into(imageView);
which is sad because I had to manually get those URLs from my browser and it does not work with the newly added images from any othere device, so I need to be able to get any new image and show it too.
I have the library installed 100% and implemented but
private void startDownload(String filePath, File targetDirectory) {
DownloadRemoteFileOperation downloadOperation = new DownloadRemoteFileOperation(filePath, targetDirectory.getAbsolutePath());
downloadOperation.addDatatransferProgressListener((OnDatatransferProgressListener) mContext);
downloadOperation.execute( mClient, (OnRemoteOperationListener) mContext, mHandler);
}
#Override
public void onTransferProgress(long l, long l1, long l2, String s) {
mHandler.post( new Runnable() {
#Override
public void run() {
// do your UI updates about progress here
}
});
}
#Override
public void onRemoteOperationFinish(RemoteOperation remoteOperation, RemoteOperationResult remoteOperationResult) {
if (remoteOperation instanceof DownloadRemoteFileOperation) {
if (remoteOperationResult.isSuccess()) {
}
}
}
got those and
got also this two
mClient = OwnCloudClientFactory.createOwnCloudClient(serverUri,mContext,true);
mClient.setCredentials(OwnCloudCredentialsFactory.newBasicCredentials(username,password));
then I call the method
startDownload(plato.getFoto_movil(),downloadfolder);
the app crashes here when I call the startdowonload method
with the error java.lang.ClassCastException: com.eidotab.eidotab.MainActivity cannot be cast to com.owncloud.android.lib.common.network.OnDatatransferProgressListener
another relevant information is that im implementing the ownclod methods to
the viewholder of a recyclerview
public class VH extends RecyclerView.ViewHolder implements OnRemoteOperationListener, OnDatatransferProgressListener
but I could change to the main activity if needed, probably make it work from there but even if it does have success, don´t know where or how to get the download links, like I said, I need the download link from every image stored in the server..
is this possible?
thanks in advance

I changed the implementation of the owncloud library to the main activity as suggested (and was the logical move) and everything went smooth.. worked at first try, I knew it was going to, the thing is that I didnt want to store the images on the device memory, I want to capture the download links which was my main concern but for now it is working since im streaming the images directly from the local sd to the imageview and that should give me some more time to investigate further in the matter whats the thing with the URLS...
Thanks cricket for your comments

Xamarin Forms QR code scanner blank screen

I have a Xamarin Forms 2.0 application that uses ZXing.Net.Mobile and ZXing.Net.Mobile.Forms version 2.0.3.1. I'm trying to build a simple QR code scanner, but whenever I launch the ZXingScannerPage on Android I can see the default overlay (with the text and the red line) but I don't see the output of the camera so I can't actually scan anything. I have already listed the Camera permission in my AndroidManifest:
<uses-permission android:name="android.permission.CAMERA" />
I tried the sample code from the readme: https://github.com/Redth/ZXing.Net.Mobile as well as from their Samples/Forms project. I now have this code:
private async void OnScanQrClicked(object sender, EventArgs e)
{
_scannerPage = new ZXingScannerPage();
_scannerPage.OnScanResult += HandleScanResult;
await Navigation.PushAsync(_scannerPage);
}
private void HandleScanResult(Result result)
{
_scannerPage.IsScanning = false;
Device.BeginInvokeOnMainThread(() =>
{
Navigation.PopAsync();
DisplayAlert("Scanned code", result.Text, "OK");
});
}
Some more specs: I'm running Android 5.1 on a Moto G (v1).
Why am I not seeing the output of the camera?

I fixed it by getting rid of ZXing.Net.Mobile.Forms and downgrading ZXing.Net.Mobile from 2.0 to 1.5. I had to change my implementation, but that was relatively easy.
Another thing people may look at in the future (I didn't try it) is adding the flashlight permission: https://github.com/Redth/ZXing.Net.Mobile/issues/227.