public void onRevertClick(View view) {
        populateUi();
        Toast.makeText(this, "Personal information reverted", Toast.LENGTH_LONG).show();
        Log.i(TAG, "Personal information reverted");
    }
Called when the "Revert" button is clicked.
unit/BasicSample/app/src/main/java/com/example/android/testing/unittesting/BasicSample/MainActivity.java