ScrollView中ListView显示不全解决方法

来源：互联网发布：特朗普搞笑知乎编辑：程序博客网时间：2024/05/21 16:57

重写ListView

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ListView;

public class MyListView extends ListView {

public MyListView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
}

public MyListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if(ev.getAction() == MotionEvent.ACTION_MOVE){
return true;
}
return super.dispatchTouchEvent(ev);
}
}

试了这种方法还是显示不全总是少二项内容,又使用了如下方法：

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, len = listAdapter.getCount(); i < len; 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() * (listAdapter.getCount() - 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);
}

还是一样效果少二项内容

最后在网上找到有人重写LinearLayout显示列表

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

/***
*
* @author FreePC
*
*/
public class LinearLayoutForListView extends LinearLayout
{
private BaseAdapter adapter;
private OnItemClickListener onItemClickListener;


/**
* 通过 Java代码实例化
* @param context
*/
public LinearLayoutForListView(Context context)
{
super(context);
//设置LinearLayoutForListView为垂直布局，否者默认为水平布局，容易疏忽导致子项显示不全
LinearLayoutForListView.this.setOrientation(LinearLayout.VERTICAL);
}


/**
* 此构造函数可以允许我们通过 XML的方式注册控件
* @param context
* @param attrs
*/
public LinearLayoutForListView(Context context, AttributeSet attrs)
{
super(context, attrs);
LinearLayoutForListView.this.setOrientation(LinearLayout.VERTICAL);
}



/**
* 设置适配器
*
* @param adpater
*/
public void setAdapter(BaseAdapter adpater)
{
this.adapter = adpater;
bindLinearLayout();
}

/**
* 获取适配器Adapter
*
* @return adapter
*/
public BaseAdapter getAdpater()
{
return adapter;
}



/**
* 绑定布局:将每个子项的视图view添加进此线性布局LinearLayout中
*/
public void bindLinearLayout()
{
int count = adapter.getCount();
for (int i = 0; i < count; i++)
{
View v = adapter.getView(i, null, null);

if (i != count - 1)
{ //添加每项item之间的分割线
v = addLine(v);
}
addView(v, i);
}
setItemClickListener();
Log.v("countTAG", "" + count);
}

/**
* 添加每项item之间的分割线
*
* @param view
* @return
*/
public View addLine(View view)
{
//分割线view
View lineView = new View(view.getContext());

// 将数据从dip(即dp)转换到px，第一参数为数据原单位（此为DIP），第二参数为要转换的数据值
float fPx = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
(float) 0.5, view.getResources().getDisplayMetrics());
int iPx = Math.round(fPx);

LayoutParams layoutParams = new LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, iPx);
lineView.setLayoutParams(layoutParams);
lineView.setBackgroundColor(view.getSolidColor());

LinearLayout ly = new LinearLayout(view.getContext());
ly.setOrientation(LinearLayout.VERTICAL);

ly.addView(view);
ly.addView(lineView);

return ly;
}


/**
* 设置点击子项事件监听对象
* @param onItemClickListener
*/
public void setOnItemClickListener(OnItemClickListener onItemClickListener)
{
this.onItemClickListener = onItemClickListener;
setItemClickListener();
}

/**
* 获取点击子项事件监听对象
* @return
*/
public OnItemClickListener getOnItemClickListener()
{
return onItemClickListen

}

这种方法完全可以搞定，在原来开发当中上面二个方法都可以搞定不知道这次为什么不行

我怀疑是布局问题

item布局是

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"         android:background="@color/v_common_line_color"></LinearLayout>

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