Android 解决ListView 和 ScrollView 共存冲突的问题.doc

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解决步骤： 1、继承LinearLayout，既然会冲突那就不用ListView 改成线性布局做动态布局效果 2、继承BaseAdapter ，可以参照一下Android app源码中 Widget 目录下的SimpleAdapter 为前面扩展的LinearLayout做数据。 3、模拟数据填充扩展后的BaseAdapter 为扩展后的LinearLayout 加载数据第一步：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 data;private String from;private int to;public AdapterForLinearLayout(Context context,List? extends Map 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：Overridepublic View getView(int position, View convertView, ViewGroup parent) / TODO Auto-generated method stubconvertView = mInflater.inflate(resource, null);Map item = data.get(position);int count = to.length;for (int i = 0; i count; i+) View v = convertView.findViewById(toi);bindView(v, item, fromi);convertView.setTag(position);return convertView;/* 绑定视图* param view* param item* param from*/private void bindView(View view, Map item, String from) Object data = item.get(from);if (view instanceof TextView) (TextView) view).setText(data = null ? : data.toString();Tip: BindView 方法是一个自定义方法，在方法体内可以为通过判断使本类更具灵活性，如上，你不仅可以判断是TextView 并且可以传入任何你想要的View 只要在方法体内加入相应判断即可，数据可以通过data 做相应处理，具体如何操作读者可另行测试。 convertView.setTag(position); 此句代码为View 设置tag 在以后我们可以通过 getTag 找出下标，后文有介绍如何通过下标操作数据。下面是两个类的全部代码，读者可以无须更改直接使用：LinearLayoutForListViewpackage 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;AdapterForLinearLayoutpackage 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 data;private String from;private int to;public AdapterForLinearLayout(Context context,List? extends Map 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);Overridepublic int getCount() / TODO Auto-generated method stubreturn data.size();Overridepublic Object getItem(int position) / TODO Auto-generated method stubreturn data.get(position);SuppressWarnings(unchecked)public String get(int position, Object key) Map map = (Map) getItem(position);return map.get(key).toString();Overridepublic long getItemId(int position) / TODO Auto-generated method stubreturn position;Overridepublic View getView(int position, View convertView, ViewGroup parent) / TODO Auto-generated method stubconvertView = mInflater.inflate(resource, null);Map item = data.get(position);int count = to.length;for (int i = 0; i count; i+) View v = convertView.findViewById(toi);bindView(v, item, fromi);convertView.setTag(position);return convertView;/* 绑定视图* param view* param item* param from*/private void bindView(View view, Map 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：第三步：主页面使用控件并为其设置数据 XML如下： 加载数据如下：lv = (LinearLayoutForListView) findViewById(R.id.ListView01);for (int i = 0; i