我有这个xml,我有一个列表视图,我在按钮点击时添加了项目。问题是ListViews的高度没有增长,我只能看到一个项目......
这是我的xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical" tools:context=".NewOrder">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/scrollView">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout android:tag="Order Status"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Spinner
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<TextView
android:layout_width="@dimen/field_label_width"
android:layout_height="wrap_content"
android:text="Status"/>
</LinearLayout>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/lstItems"></ListView>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@android:drawable/ic_input_add"
android:onClick="btnAddItemToList"/>
</LinearLayout>
</ScrollView>
如果重要,列表视图项有:2 EditTexts,1 TextView和一个按钮,所以我使用自定义适配器。
如何使列表视图高度相应增长?
答案 0 :(得分:6)
private void setListViewHeightBasedOnChildren(ListView listView) {
Log.e("Listview Size ", "" + listView.getCount());
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
设置适配器时调用它。
答案 1 :(得分:2)
我在这里找到了这个解决方案:Dynamically change the ListView height - Android对我有用(虽然我不知道它是否是最好的方式因为我觉得它会更简单......)。 / p>
以下是代码(如果链接没有做到):
import android.view.View;
import android.view.ViewGroup;
import android.view.View.MeasureSpec;
import android.widget.ListAdapter;
import android.widget.ListView;
public class Utility {
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}
int totalHeight = 0;
int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(), MeasureSpec.AT_MOST);
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
}