Generic dialogframent to take in arguments, size itself, and set anything as its listener

CallingActivityOrView.java

@Override protected void onViewBound(@NonNull View view) {
    super.onViewBound(view);

    TestDialog.reAttachListener(getActivity(), TestDialog.class, this);

    btnShowDialog.setOnClickListener(v -> {
      TestDialog gd = new TestDialogBuilder(R.dimen.dialog_add_inspection_item_height,
          R.dimen.dialog_add_inspection_item_width, R.string.camera, R.string.title).build();

      TestDialog.show(getActivity(), gd, this);
    }
}

dialog_generic.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:id="@+id/wrap_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:descendantFocusability="beforeDescendants"
    android:focusableInTouchMode="true"
    >

  <android.support.constraint.Guideline
      android:id="@+id/guide_start"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_begin="@dimen/dialog_guide_begin"
      tools:layout_editor_absoluteY="0dp"
      tools:layout_editor_absoluteX="40dp"
      />

  <android.support.constraint.Guideline
      android:id="@+id/guide_end"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_end="@dimen/dialog_guide_end"
      tools:layout_editor_absoluteY="0dp"
      tools:layout_editor_absoluteX="760dp"
      />

  <android.support.constraint.Guideline
      android:id="@+id/guide_mid"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_percent="0.5"
      tools:layout_editor_absoluteY="0dp"
      tools:layout_editor_absoluteX="400dp"
      />

  <TextView
      android:id="@+id/txt_title_dialog_generic"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginTop="12dp"
      android:textAppearance="@style/TextAppearance.FontPath.Medium"
      android:textColor="@color/grey_dark"
      app:layout_constraintLeft_toLeftOf="@+id/guide_start"
      app:layout_constraintTop_toTopOf="parent"
      android:text="@string/title"
      app:layout_constraintRight_toLeftOf="@+id/guide_end"
      />

  <LinearLayout
      android:id="@+id/layout_linear_dialog_generic"
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:layout_marginTop="32dp"
      android:background="@color/pink"
      android:divider="@drawable/div_horizontal"
      android:orientation="vertical"
      android:showDividers="beginning|middle|end"
      app:layout_constraintBottom_toTopOf="@+id/div_buttons_top"
      app:layout_constraintLeft_toLeftOf="@+id/guide_start"
      app:layout_constraintTop_toBottomOf="@+id/txt_title_dialog_generic"
      app:layout_constraintVertical_bias="0.0"
      tools:layout_height="400dp"
      app:layout_constraintRight_toLeftOf="@+id/guide_end"
      />

  <View
      android:id="@+id/div_buttons_top"
      android:layout_width="0dp"
      android:layout_height="1dp"
      android:background="@drawable/div_horizontal"
      app:layout_constraintBottom_toTopOf="@+id/btn_dialog_generic_negative"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      />

  <View
      android:id="@+id/div_buttons_mid"
      android:layout_width="1dp"
      android:layout_height="0dp"
      android:background="@drawable/div_vertical"
      app:layout_constraintBottom_toBottomOf="@+id/btn_dialog_generic_negative"
      app:layout_constraintLeft_toRightOf="@+id/btn_dialog_generic_negative"
      app:layout_constraintRight_toLeftOf="@+id/btn_dialog_generic_positive"
      app:layout_constraintTop_toTopOf="@+id/btn_dialog_generic_negative"
      />

  <Button
      app:layout_constraintTop_toBottomOf="@id/layout_linear_dialog_generic"
      android:id="@+id/btn_dialog_generic_negative"
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:background="@null"
      android:gravity="center"
      android:textAllCaps="true"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toLeftOf="@+id/guide_mid"
      android:text="@string/cancel"
      app:layout_constraintVertical_bias="1.0"
      android:layout_marginTop="34dp"
      />

  <Button
      android:id="@+id/btn_dialog_generic_positive"
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      android:layout_marginEnd="1dp"
      android:background="@null"
      android:textAllCaps="true"
      app:layout_constraintBottom_toBottomOf="@+id/btn_dialog_generic_negative"
      app:layout_constraintLeft_toLeftOf="@+id/guide_mid"
      app:layout_constraintRight_toRightOf="parent"
      app:layout_constraintTop_toTopOf="@+id/btn_dialog_generic_negative"
      android:text="@string/ok"
      />

</android.support.constraint.ConstraintLayout>

GenericDialog.java

@FragmentWithArgs public abstract class GenericDialog<DataType> extends DialogFragment {

  @Arg @StringRes public int strTitle;
  @Arg(required = false) public @StringRes int strBtnPositive;
  @Arg(required = false) public @StringRes int strBtnNegative;

  @Arg @DimenRes public int dimenWidth;
  @Arg @DimenRes public int dimenHeight;

  @BindView(R.id.txt_title_dialog_generic) TextView tvTitle;
  @BindView(R.id.btn_dialog_generic_positive) Button btnPositive;
  @BindView(R.id.btn_dialog_generic_negative) Button btnNegative;
  @BindView(R.id.layout_linear_dialog_generic) LinearLayout linearLayout;

  protected int[] layouts;

  protected OnPositiveClickListener onClickListener;

  public interface OnPositiveClickListener {
    void onPositiveClick(Object data);
  }

  @Override public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FragmentArgs.inject(this);
  }

  @Override public void onStart() {
    super.onStart();
    getDialog().getWindow()
        .setLayout(getResources().getDimensionPixelSize(dimenWidth),
            getResources().getDimensionPixelSize(dimenHeight));
  }

  @Nullable @Override
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
      @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.dialog_generic, container);
    if (layouts.length > 0) {
      addViews(getActivity(), rootView, layouts);
    }
    return rootView;
  }

  @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    ButterKnife.bind(this, view);
    tvTitle.setText(strTitle);
    btnPositive.setText(strBtnPositive != 0 ? strBtnPositive : R.string.ok);
    btnNegative.setText(strBtnNegative != 0 ? strBtnNegative : R.string.cancel);
  }

  @OnClick(R.id.btn_dialog_generic_positive) public abstract void onPositiveClick();

  @OnClick(R.id.btn_dialog_generic_negative) void onNegativeClick() {
    dismiss();
  }

  private void setOnClickListener(@NonNull OnPositiveClickListener onClickListener) {
    this.onClickListener = onClickListener;
  }

  protected void onPositiveClickImp(DataType data) {
    if (data != null && onClickListener != null) {
      onClickListener.onPositiveClick(data);
    }
  }

  @Override public void onDetach() {
    onClickListener = null;
    super.onDetach();
  }

  public static void addViews(Activity activity, View rootView, int[] layouts) {
    LinearLayout ll = (LinearLayout) rootView.findViewById(R.id.layout_linear_dialog_generic);
    for (int i = 0; i < layouts.length; i++) {
      LayoutInflater.from(activity).inflate(layouts[0], ll, true);
    }
  }

  public static void show(Activity activity, GenericDialog genericDialog,
      OnPositiveClickListener onPositiveClickListener) {
    genericDialog.setOnClickListener(onPositiveClickListener);
    genericDialog.show(activity.getFragmentManager(), genericDialog.getClass().getSimpleName());
  }

  public static void reAttachListener(@NonNull Activity activity, Class fragment,
      @NonNull OnPositiveClickListener onPositiveClickListener) {
    GenericDialog gd =
        (GenericDialog) activity.getFragmentManager().findFragmentByTag(fragment.getSimpleName());
    if (gd != null) gd.setOnClickListener(onPositiveClickListener);
  }
}

TestDialog.java

@FragmentWithArgs public class TestDialog extends GenericDialog<Integer> {

  @Arg @StringRes public int strText1;
  @BindView(android.R.id.text1) TextView text1;
  
  int i = 0;

  {
    layouts = new int[] { android.R.layout.simple_list_item_1 };
  }

  @Override public void onPositiveClick() {
    onPositiveClickImp(i++);
    if(i == 2) dismiss(); // validation
  }

  @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    text1.setText(strText1 != 0 ? strText1 : R.string.ok);
  }
}