How to get read external storage permissions?

You have asked the permission from the code , but you are probably forgetting to add this permission tag in the manifest file

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

Android introduce runtime permission from Marshmallow OS, so we need to implement runtime permission with Manifest permission. if CompileSdkVersion = 23

You can ask permission when your screen open (in onCreate()) or click event of your button (Like -play Music )

use this method for check runtime Permission is enable or not

 private static final int READ_STORAGE_PERMISSION_REQUEST_CODE = 41; public boolean checkPermissionForReadExtertalStorage() {    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {        int result = context.checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE);        return result == PackageManager.PERMISSION_GRANTED;    }    return false; }

if it return false then call below method, it will show a dialog for permission

 public void requestPermissionForReadExtertalStorage() throws Exception {        try {            ActivityCompat.requestPermissions((Activity) context, new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE},                    READ_STORAGE_PERMISSION_REQUEST_CODE);        } catch (Exception e) {            e.printStackTrace();            throw e;        }    }