警报对话框列表视图长度

Question

我想将AlertDialog设置为内部ListView的长度，AlertDialog底部有一个按钮，目前即使列表包含 1 或 2 个项目，也跨越整个屏幕，我怎么能做到这一点，

这是我到目前为止的代码：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lvItemsSelected"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_above="@+id/buttonOk"/>
<Button
android:id="@+id/buttonOk"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:layout_alignParentEnd="true"
android:text="OK"/>
</RelativeLayout>

Answer 1

如果这可以帮助您，请尝试在将数据填充到 ListView 后调用此方法

public void getListViewSize(ListView myListView, Context context) {
ListAdapter myListAdapter = myListView.getAdapter();
if (myListAdapter == null) {
return;
}
int totalHeight = 0;
for (int size = 0; size < myListAdapter.getCount(); size++) {
View listItem = myListAdapter.getView(size, null, myListView);
if (listItem instanceof ViewGroup)
listItem.setLayoutParams(new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT));
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
@SuppressWarnings("deprecation")
int screenWidth = display.getWidth();
int listViewWidth = screenWidth - 65;
int widthSpec = View.MeasureSpec.makeMeasureSpec(listViewWidth,
View.MeasureSpec.AT_MOST);
listItem.measure(widthSpec, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = myListView.getLayoutParams();
params.height = totalHeight
+ (myListView.getDividerHeight() * (myListAdapter.getCount() - 1));
myListView.setLayoutParams(params);
myListView.requestLayout();
}

Answer 2

你可以做的是使用ConstraintLayout而不是RelativeLayout，然后将AlertDialog的约束链接到ListView的宽度