1.listview解决方法
public static void setListViewHeightBasedOnChildren(ListView listView) {
if(listView == null) return;
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
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);
}
2.gridview解决方法
public static void setGridViewHeightBasedOnChildren(GridView gridView){
// 获取listview的adapter
ListAdapter listAdapter = gridView.getAdapter();
if (listAdapter == null) {
return;
}
// 固定列宽，有多少列
int col = 3; //gridView.getNumColumns();
int totalHeight = 0;
// i每次加4，相当于listAdapter.getCount()小于等于4时 循环一次，计算一次item的高度，
// listAdapter.getCount()小于等于8时计算两次高度相加
for (int i = 0; i < listAdapter.getCount(); i += col) {
// 获取listview的每一个item
View listItem = listAdapter.getView(i, null, gridView);
listItem.measure(0, 0);
// 获取item的高度和
totalHeight += listItem.getMeasuredHeight();
}
// 获取listview的布局参数
ViewGroup.LayoutParams params = gridView.getLayoutParams();
// 设置高度
params.height = totalHeight+20;
// 设置margin
((ViewGroup.MarginLayoutParams) params).setMargins(10, 10, 10, 10);
// 设置参数
gridView.setLayoutParams(params);
}
3.自定义ListView
public class CustomListView extends ListView {
public CustomListView(Context context) {
super(context);
}
public CustomListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomListView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
}