Uri uri = Uri.parse("content://com.samsung.android.knox.sdk/license");
 ContentValues contentValues = new ContentValues();
 contentValues.put("key", "YOUR_LICENSE_NUMBER");
 String selection = "key=?";
 String[] selectionArgs = new String[] {""};
 mContext.getContentResolver().update(uri, contentValues, selection, selectionArgs);

 Uri uri = Uri.parse("content://com.samsung.android.knox.sdk/license");
 String selection = "key=?";
 String[] selectionArgs = new String[] {""};
 Cursor cursor = mContext.getContentResolver().query(uri, null, selection, selectionArgs, null);
 boolean isLicenseActivated = false;
 if (cursor != null) {
     cursor.moveToFirst();
     isLicenseActivated = Boolean.parseBoolean(cursor.getString(0));
 }

 Uri uri = Uri.parse("content://com.samsung.android.knox.sdk/license");
 String selection = "key=?";
 String[] selectionArgs = new String[] {"YOUR_LICENSE_NUMBER"};
 mContext.getContentResolver().delete(uri, selection, selectionArgs);