How to implemention PhotoEditor?

I have some difficulty understanding, why does not show me anything? What have I missed?

I add gradle implementation 'ja.burhanrashid52:photoeditor:0.3.3'

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black"
tools:context=".MainActivity">

<ja.burhanrashid52.photoeditor.PhotoEditorView
    android:id="@+id/photoEditorView"
    android:layout_width="wrap_content"
    android:layout_height="384dp"
    app:photo_src="@drawable/ic_stat_name" />

</android.support.constraint.ConstraintLayout>

MainActivity.java:

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        PhotoEditorView mPhotoEditorView = findViewById(R.id.photoEditorView);
        mPhotoEditorView.getSource().setImageResource(R.drawable.ic_stat_name);

        Typeface mTextRobotoTf = ResourcesCompat.getFont(this, R.font.roboto_medium);
        Typeface mEmojiTypeFace = Typeface.createFromAsset(getAssets(), "fonts/emojione-android.ttf");
        PhotoEditor mPhotoEditor = new PhotoEditor.Builder(this, mPhotoEditorView)
                .setPinchTextScalable(true)
                .setDefaultTextTypeface(mTextRobotoTf)
                .setDefaultEmojiTypeface(mEmojiTypeFace)
                .build();
    }

[kkm]

Do I have to do everything XML or just one by one?

[kateile]

I have not figured out how to make it work till now. Lets assume I want similar Layout of the editor like the one with Ned Stark. So how my xml need to look like? Like this or this. Is there any sample app?