ActivityCompat.requestPermissions not showing dialog box

Question

if (ContextCompat.checkSelfPermission(RegisterActivity.this,      Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_DENIED){
            ActivityCom         


        

Answer 1

For me the error was in the manifest: the permission was in uppercase. Android Studio suggest me the permissions in uppercase. I don't care about that and it took me two hours to fixe this problem.

The right syntaxe for permission is
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Answer 2

Replace:

ActivityCompat.requestPermissions(this, new String[]{"Manifest.permission.READ_PHONE_STATE"}, 225);

with:

ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE}, 225);

The actual string for that permission is not "Manifest.permission.READ_PHONE_STATE". Use the symbol Manifest.permission.READ_PHONE_STATE.