ListView 与 ScrollView 同在一个界面用头脑想想都觉得不大可能这样做,但还真的有美工这样做了,有点郁闷~!!沟通无果,解决之~~~~!初期还真没啥头绪,Google 一下看到有很多同样碰到这类头痛的问题,不好意思还没描述问题症状。ListView 与 ScrollView 同在一界面会导致ListView 显示变形,因为ListView 也有自带的滚动事件,故无法与ScrollView 相容,可能造成的现象是ListView 只能显示一行或者两行,其他数据在那一点儿宽的地方做滚动,甚不雅观。 下面是我的一个实现 步骤:
第一步:新建LinearLayoutForListView 类使其扩展LinearLayout重写以下两个方法:
public LinearLayoutForListView(Context context) { super(context); } public LinearLayoutForListView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub }
这两个方法可选,不过建议都写上,第一个方法可以让我们通过 编程的方式 实例化出来,第二个方法可以允许我们通过 XML的方式注册 控件,可以在第二个方法里面为扩展的复合组件加属性,详细使用方法请点击这里 。 为其添加get / set 方法 /** * 获取Adapter * * @return adapter */ public AdapterForLinearLayout getAdpater() { return adapter; } /** * 设置数据 * * @param adpater */ public void setAdapter(AdapterForLinearLayout adpater) { this.adapter = adpater; bindLinearLayout(); } /** * 获取点击事件 * * @return */ public OnClickListener getOnclickListner() { return onClickListener; } /** * 设置点击事件 * * @param onClickListener */ public void setOnclickLinstener(OnClickListener onClickListener) { this.onClickListener = onClickListener; }
第二步:新建AdapterForLinearLayout 类继承自BaseAdapter,并为其添加构造函数
private LayoutInflater mInflater; private int resource; private List<? extends Map<String, ?>> data; private String[] from; private int[] to; public AdapterForLinearLayout(Context context, List<? extends Map<String, ?>> data, int resouce, String[] from, int[] to) { this.data = data; this.resource = resouce; this.data = data; this.from = from; this.to = to; this.mInflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); }
此构造函数模仿 simpleAdapter 通过传进来的resouce 为布局设置数据。通过继承BaseAdapter 重要的实现方法在下面getView ,此方法判断通过传进来的 String[] from 与 int[] to 为分别查找出View 并为View 设置相应的Text,代码如下:
@Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub convertView = mInflater.inflate(resource, null); Map<String, ?> item = data.get(position); int count = to.length; for (int i = 0; i < count; i++) { View v = convertView.findViewById(to[i]); bindView(v, item, from[i]); } convertView.setTag(position); return convertView; } /** * 绑定视图 * @param view * @param item * @param from */ private void bindView(View view, Map<String, ?> item, String from) { Object data = item.get(from); if (view instanceof TextView) { ((TextView) view).setText(data == null ? "" : data.toString()); } }
Tip:
下面是两个类的全部代码,读者可以无须更改直接使用: LinearLayoutForListView package com.terry.widget; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.widget.LinearLayout; public class LinearLayoutForListView extends LinearLayout { private AdapterForLinearLayout adapter; private OnClickListener onClickListener = null; /** * 绑定布局 */ public void bindLinearLayout() { int count = adapter.getCount(); for (int i = 0; i < count; i++) { View v = adapter.getView(i, null, null); v.setOnClickListener(this.onClickListener); if (i == count - 1) { LinearLayout ly = (LinearLayout) v; ly.removeViewAt(2); } addView(v, i); } Log.v("countTAG", "" + count); } public LinearLayoutForListView(Context context) { super(context); } public LinearLayoutForListView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub } /** * 获取Adapter * * @return adapter */ public AdapterForLinearLayout getAdpater() { return adapter; } /** * 设置数据 * * @param adpater */ public void setAdapter(AdapterForLinearLayout adpater) { this.adapter = adpater; bindLinearLayout(); } /** * 获取点击事件 * * @return */ public OnClickListener getOnclickListner() { return onClickListener; } /** * 设置点击事件 * * @param onClickListener */ public void setOnclickLinstener(OnClickListener onClickListener) { this.onClickListener = onClickListener; } }
AdapterForLinearLayout package com.terry.widget; import java.util.List; import java.util.Map; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; public class AdapterForLinearLayout extends BaseAdapter { private LayoutInflater mInflater; private int resource; private List<? extends Map<String, ?>> data; private String[] from; private int[] to; public AdapterForLinearLayout(Context context, List<? extends Map<String, ?>> data, int resouce, String[] from, int[] to) { this.data = data; this.resource = resouce; this.data = data; this.from = from; this.to = to; this.mInflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); } @Override public int getCount() { // TODO Auto-generated method stub return data.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return data.get(position); } @SuppressWarnings("unchecked") public String get(int position, Object key) { Map<String, ?> map = (Map<String, ?>) getItem(position); return map.get(key).toString(); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub convertView = mInflater.inflate(resource, null); Map<String, ?> item = data.get(position); int count = to.length; for (int i = 0; i < count; i++) { View v = convertView.findViewById(to[i]); bindView(v, item, from[i]); } convertView.setTag(position); return convertView; } /** * 绑定视图 * @param view * @param item * @param from */ private void bindView(View view, Map<String, ?> item, String from) { Object data = item.get(from); if (view instanceof TextView) { ((TextView) view).setText(data == null ? "" : data.toString()); } } }
对应的XML 如下:
<?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas./apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/TextView01" android:layout_marginLeft="10px" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_width="wrap_content" android:layout_height="wrap_content"> </TextView> <TextView android:id="@+id/TextView02" android:layout_width="wrap_content" android:textAppearance="?android:attr/textAppearanceSmall" android:layout_marginLeft="10px" android:layout_height="wrap_content"> </TextView> <View android:layout_height="1px" android:background="#FFFFFF" android:layout_width="fill_parent"></View> </LinearLayout>
第三步:主页面使用控件并为其设置数据
至此完成。有碰到这个问题的朋友可以试试。 |
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来自: android之情殇 > 《android》