我将ListView与ArrayAdapter结合使用，以便在“即将来临的事件”中在屏幕上显示
我的目标是在全屏高度显示ListView的每个项目，这样用户可以在每个项目之间滚动，并且看起来也更好。
仅当我手动将ConstraintLayout高度设置为手机屏幕尺寸时，我才能得到所需的布局。
我还尝试设置ConstraintLayout高度以抛出适配器：
// Find the CategoryItemView in order to set his height to full screen
ConstraintLayout constraintLayout = listItemView.findViewById(R.id.container);
constraintLayout.setMinHeight(686);
但是由于某种原因根本不会改变高度。
我的代码：
public class HomeCategoryAdapter extends ArrayAdapter<HomeCategory>{
public int mScreenHeightDp;
/**
* This is our own custom constructor (it doesn't mirror a superclass constructor).
* The context is used to inflate the layout file, and the list is the data we want
* to populate into the lists.
*/
public HomeCategoryAdapter(Activity context, ArrayList<HomeCategory> homeCategories, int screenHeightDp) {
// Here, we initialize the ArrayAdapter's internal storage for the context and the list.
// the second argument is used when the ArrayAdapter is populating a single TextView.
super(context, 0, homeCategories);
mScreenHeightDp = screenHeightDp;
}
/**
* Provides a view for an AdapterView (ListView, GridView, etc.)
*
* @param position The position in the list of data that should be displayed in the
* list item view.
* @param convertView The recycled view to populate.
* @param parent The parent ViewGroup that is used for inflation.
* @return The View for the position in the AdapterView.
*/
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
View listItemView = convertView;
if(listItemView == null) {
listItemView = LayoutInflater.from(getContext()).inflate(
R.layout.list_category, parent, false);
}
// Find the CategoryItemView in order to set his height to full screen
ConstraintLayout constraintLayout = listItemView.findViewById(R.id.container);
constraintLayout.setMinHeight(686);
// Get the {@link Word} object located at this position in the list
final HomeCategory current = getItem(position);
// Find the TextView in the list_category.xml layout with the ID version_name
TextView categoryName = (TextView) listItemView.findViewById(R.id.header);
// Get the version name from the current Word object and
// set this text on the name TextView
categoryName.setText(current.getmCategoryHeader());
// Find the TextView in the list_category.xml layout with the Starts
TextView categoryDescription = (TextView) listItemView.findViewById(R.id.description);
// Get the version number from the current Word object and
// set this text on the number TextView
categoryDescription.setText(current.getmCategoryDescription());
// Find the ImageView in the list_category.xml layout
ImageView imageCategory = (ImageView) listItemView.findViewById(R.id.img_header);
// Get the version image from the current Word object and
// set this image on the ImageView
imageCategory.setImageResource(current.getmImageResourceID());
// Make sure the view is visible
imageCategory.setVisibility(View.VISIBLE);
// Return the whole list item layout (
// so that it can be shown in the ListView
return listItemView;
}
}
然后
public class MasterFragment extends Fragment {
private ArrayList<Category> mData;
public MasterFragment() {}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle bundle) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.item_list, container, false);
mData = (ArrayList<Category>)getArguments().getSerializable("Data");
// Create an {@link WordAdapter}, whose data source is a list of {@link Category}s. The
// adapter knows how to create list items for each item in the list.
CategoryAdapter adapter = new CategoryAdapter(getActivity(), mData, R.color.colorAccent);
// Find the {@link ListView} object in the view hierarchy of the {@link Activity}.
// There should be a {@link ListView} with the view ID called list, which is declared in the
// word_list.xml layout file.
ListView listView = (ListView) rootView.findViewById(R.id.list);
// Make the {@link ListView} use the {@link WordAdapter} we created above, so that the
// {@link ListView} will display list items for each {@link Word} in the list.
listView.setAdapter(adapter);
return rootView;
}
}
和XML：
<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/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="32dp"
android:background="@drawable/customborder">
<ImageView
android:id="@+id/img_header"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:contentDescription="Header Image"
android:scaleType="centerCrop"
app:layout_constraintBottom_toTopOf="@id/guideline2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:src="@drawable/attractions_beit_hatfutsot" />
<android.support.constraint.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.55" />
<TextView
android:id="@+id/slogan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:text="@string/slogan"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline2" />
<TextView
android:id="@+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/slogan"
tools:text="Attractions"/>
<TextView
android:id="@+id/description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:textAppearance="@style/TextAppearance.AppCompat.Body2"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@id/header"
tools:layout_editor_absoluteX="26dp"
tools:text="@string/random_text" />
</android.support.constraint.ConstraintLayout>
答案 0 :(得分：0)
尝试一下：
android:layout_height:"match_parent"
但是我认为您应该尝试使用RecyclerView。