RT
根据adapter获取到每一项item的高度,再动态设置listview或者gridview的高度。
public class Utility {
public void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
int count = listAdapter.getCount();
for (int i = 0; i < count; i++) { // listAdapter.getCount()返回数据项的数目
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0); // 计算子项View 的宽高
totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (count - 1));
// listView.getDividerHeight()获取子项间分隔符占用的高度
// params.height最后得到整个ListView完整显示需要的高度
listView.setLayoutParams(params);
}
public void setGridViewHeightBasedOnChildren(GridView gridView) {
ListAdapter listAdapter = gridView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
int count = listAdapter.getCount();
View listItem = listAdapter.getView(0, null, gridView);
listItem.measure(0, 0); // 计算子项View 的宽高
totalHeight = listItem.getMeasuredHeight() + 10; // 统计所有子项的总高度
int yu = count % 4;
ViewGroup.LayoutParams params = gridView.getLayoutParams();
if (yu > 0) {
params.height = (count - yu) / 4 * (totalHeight + 10)
+ totalHeight;
} else {
params.height = count / 4 * totalHeight + (count / 4 - 1) * 10;
}
gridView.setLayoutParams(params);
}
}
我这儿gridview是显示4列,所以获取高度的时候算法是这样,可以根据需要更改。
用法在listview.setadapter之后,调用此方法中的其中某一个.
new Utility().setListViewHeightBasedOnChildren(AppList);