Java ListAdapter.getView方法代码示例

import android.widget.ListAdapter; //导入方法依赖的package包/类
private int measureHeight(int measureSpec) {
	int mode = MeasureSpec.getMode(measureSpec);
	if (mode == MeasureSpec.AT_MOST) {
		return MeasureSpec.makeMeasureSpec(measureSpec, mode);
	} else if (mode == MeasureSpec.EXACTLY) {
		ListAdapter adapter = getAdapter();
		if (adapter == null) {
			measureSpec = 0;
		} else {
			int result = 0;
			for (int i = 0; i < adapter.getCount(); i++) {
				View contentView = adapter.getView(i, null, null);
				contentView.measure(0, 0);
				result += contentView.getMeasuredHeight();
			}
			measureSpec = result + getDividerHeight()
					* (adapter.getCount() - 1);
		}
	}

	return MeasureSpec.makeMeasureSpec(measureSpec, mode);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * @Title: setListViewHeightBasedOnChildren @Description:
 * TODO(根据ListView算出List的高度) @param @param mContext @param @param
 * listView 参数 @return void 返回类型 @throws
 */
public static void setListViewHeightBasedOnChildren(Context mContext, ListView listView) {
    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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
public static void setListViewHeightBasedOnChildren(ListView listView) {
    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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * @param listView
 * @author sunglasses
 * @category 计算listview高度
 */
public static void setListViewHeightBasedOnChildren(ListView listView) {
    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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * 动态设置ListView的高度
 * @param listView ListView
 */
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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * Get a View that displays the data at the specified
 * position in the data set.
 *
 * @param position    Position of the item whose data we want
 * @param convertView View to recycle, if not null
 * @param parent      ViewGroup containing the returned View
 */
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    for (ListAdapter piece : getPieces()) {
        int size = piece.getCount();

        if (position < size) {

            return (piece.getView(position, convertView, parent));
        }

        position -= size;
    }

    return (null);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
public static void setListViewHeightBasedOnChildren(ListView listView) {
    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 = 80 * (listAdapter.getCount() - 1);
    // params.height = 80 * (listAdapter.getCount());
    params.height = totalHeight
            + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
    ((ViewGroup.MarginLayoutParams) params).setMargins(0, 0, 0, 0);
    listView.setLayoutParams(params);

}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * 修正listview高度
 */
public static void setListViewHeightBasedOnChildren(ListView listView) {
    // 获取ListView对应的Adapter
    ListAdapter listAdapter = listView.getAdapter();
    if (listAdapter == null) {
        return;
    }
    int totalHeight = 0;
    for (int i = 0; i < listAdapter.getCount(); 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
    }
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, totalHeight
            + (listView.getDividerHeight() * (listAdapter.getCount() - 1)));
    listView.setLayoutParams(lp);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
public static void setListViewHeightBasedOnChildren(ListView listView)
{
    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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/***
 * 动态设置listview的高度
 * 
 * @param listView
 */
public void setListViewHeightBasedOnChildren(ListView listView) {
	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));
	// params.height += 5;// if without this statement,the listview will be
	// a
	// little short
	// 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);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * 根据子item的高度 动态测量GridView的实际高度
 * @param gridView
 */
public static void setGridViewHeightByChildren(GridView gridView) {
    ListAdapter listAdapter = gridView.getAdapter();
    if (listAdapter == null) {
        return;
    }
    //总高度
    int totalHeight = 0;
    int lineNum = gridView.getNumColumns(); //得到布局文件中设置的一行显示几个
    View item = listAdapter.getView(0,null,gridView);
    item.measure(0,0); //计算子item的高度
    //得到总高度
    totalHeight = item.getMeasuredHeight()*lineNum;

    ViewGroup.LayoutParams params = gridView.getLayoutParams();
    params.height = totalHeight;
    gridView.setLayoutParams(params);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * 动态的算出ListView实际的LayoutParams 最关键的是算出LayoutParams.height
 */
private void getListViewParams() {
    // 通过ListView获取其中的适配器adapter
    ListAdapter listAdapter = lv_res.getAdapter();
    if (listAdapter == null) {
        return;
    }
    // 声明默认高度为0
    int totalHeight = 0;
    // 遍历listView中所有Item，累加所有item的高度就是ListView的实际高度（后面会考虑分割线的高度）
    for (int i = 0; i < listAdapter.getCount(); i++) {
        View item = listAdapter.getView(i, null, lv_res);
        item.measure(0, 0);
        totalHeight += item.getMeasuredHeight();
    }
    ViewGroup.LayoutParams lp = lv_res.getLayoutParams();
    lp.height = totalHeight
            + (lv_res.getDividerHeight() * (listAdapter.getCount() - 1));
    lv_res.setLayoutParams(lp);
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
private int measureHeight() {
    // get ListView adapter
    ListAdapter adapter = mListView.getAdapter();
    if (null == adapter) {
        return 0;
    }

    int totalHeight = 0;

    for (int i = 0, len = adapter.getCount(); i < len; i++) {
        View item = adapter.getView(i, null, mListView);
        if (null == item) continue;
        // measure each item width and height
        item.measure(0, 0);
        // calculate all height
        totalHeight += item.getMeasuredHeight();
    }

    ViewGroup.LayoutParams params = mListView.getLayoutParams();

    if (null == params) {
        params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
    }

    // calculate ListView height
    params.height = totalHeight + (mListView.getDividerHeight() * (adapter.getCount() - 1));

    mListView.setLayoutParams(params);

    return params.height;
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
public static void setListViewHeightBasedOnChildren(ListView listView) {
    ListAdapter listAdapter = listView.getAdapter();
    if (listAdapter != null) {
        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();
        }
        LayoutParams params = listView.getLayoutParams();
        params.height = (listView.getDividerHeight() * (listAdapter.getCount() - 1)) +
                totalHeight;
        listView.setLayoutParams(params);
    }
}
 

import android.widget.ListAdapter; //导入方法依赖的package包/类
/**
 * 计算 ListView 自适应高度
 * @param listView
 * @return
 */
public static int getWrapHeight(ListView listView){
    ListAdapter listAdapter = listView.getAdapter();
    if (listAdapter == null) {
        return 0;
    }
    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();
    }
    totalHeight += (listView.getDividerHeight() * (listAdapter.getCount() - 1));
    return totalHeight;
}