android - 动态地将 View 组添加到BottomSheetDialogFragment不会显示任何内容

Question

我想制作一个仅在布局中包含标题的抽象BottomSheetDialogFragment，然后在其子类中动态添加自定义内容布局。但是，当我运行该程序时，它仅显示标题。

public abstract class BaseBottomSheetDialog extends BottomSheetDialogFragment {

    @BindView(R.id.tvTitle)
    TextView tvTitle;

    @BindView(R.id.vgRoot)
    LinearLayout vgRoot;

    public abstract String getTittle();

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        BottomSheetDialog dialog = (BottomSheetDialog) super.onCreateDialog(savedInstanceState);

        dialog.setOnShowListener(dialog1 -> {
            BottomSheetDialog d = (BottomSheetDialog) dialog1;
            FrameLayout bottomSheet = d.findViewById(com.google.android.material.R.id.design_bottom_sheet);
            BottomSheetBehavior.from(bottomSheet).setState(BottomSheetBehavior.STATE_EXPANDED);
        });
        return dialog;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_bottom_sheet, container, false);
        ButterKnife.bind(this, view);
        setContentViews();
        return view;
    }

    public void setContentViews() {
        tvTitle.setText(getTittle());
        View content = LayoutInflater.from(getActivity()).inflate(R.layout.child_layout, vgRoot, false);
        vgRoot.addView(content);
        vgRoot.invalidate();

    }
}

fragment_bottom_sheet.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/vgRoot"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

        <TextView
            android:id="@+id/tvTitle" />

</LinearLayout>

child_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout>
      <!--child items-->

</LinearLayout>

任何帮助，将不胜感激。

Answer 1

尝试在片段的onActvitiyCreated()方法中调用setContentViews()方法。