[java] ActivityCompat.requestPermissions not showing dialog box

Don't forget to write the permissions without extra spaces in the manifest. In my case i had:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE " />

But look, at the end, there's an extra space. Just write it the right way

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

And it's working now

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