Android提高第十五篇之ListView自适应实现表格

本文来自http://blog.csdn.net/hellogv/ ，引用必须注明出处！

       上次介绍了使用GridView实现表格，这次就说说如何用ListView实现自适应的表格。GridView比ListView更容易实现自适应的表格，但是GridView每个格单元的大小固定，而ListView实现的表格可以自定义每个格单元的大小，但因此实现自适应表格也会复杂些(格单元大小不一)。另外，GridView实现的表格可以定位在具体某个格单元，而ListView实现的表格则只能定位在表格行。因此还是那句老话：根据具体的使用环境而选择GridView 或者 ListView实现表格。

先贴出本文程序运行的效果图：

本文实现的ListView表格，可以每个格单元大小不一，文本(TextView)或图片(ImageView)做格单元的数据，不需要预先定义XML实现样式(自适应的根本目标)。由于ListView置于HorizontalScrollView中，因此对于列比较多/列数据比较长的数据表也能很好地适应其宽度。

main.xml源码如下：

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical" android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <HorizontalScrollView android:id="@+id/HorizontalScrollView01"
         android:layout_height="fill_parent" android:layout_width="fill_parent">
         <ListView android:id="@+id/ListView01" android:layout_height="wrap_content"
             android:layout_width="wrap_content"></ListView>
     </HorizontalScrollView>
 </LinearLayout>

主类testMyListView.java的源码如下：

 package com.testMyListView;
 import java.util.ArrayList;
 import com.testMyListView.TableAdapter.TableCell;
 import com.testMyListView.TableAdapter.TableRow;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ListView;
 import android.widget.LinearLayout.LayoutParams;
 import android.widget.Toast;
 /**
  * @author hellogv
  */
 public class testMyListView extends Activity {
     /** Called when the activity is first created. */
     ListView lv;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         this.setTitle("ListView自适应实现表格---hellogv");
         lv = (ListView) this.findViewById(R.id.ListView01);
         ArrayList<TableRow> table = new ArrayList<TableRow>();
         TableCell[] titles = new TableCell[5];// 每行5个单元
         int width = this.getWindowManager().getDefaultDisplay().getWidth()/titles.length;
         // 定义标题
         for (int i = 0; i < titles.length; i++) {
             titles[i] = new TableCell("标题" + String.valueOf(i),
                                     width + 8 * i,
                                     LayoutParams.FILL_PARENT,
                                     TableCell.STRING);
         }
         table.add(new TableRow(titles));
         // 每行的数据
         TableCell[] cells = new TableCell[5];// 每行5个单元
         for (int i = 0; i < cells.length - 1; i++) {
             cells[i] = new TableCell("No." + String.valueOf(i),
                                     titles[i].width,
                                     LayoutParams.FILL_PARENT,
                                     TableCell.STRING);
         }
         cells[cells.length - 1] = new TableCell(R.drawable.icon,
                                                 titles[cells.length - 1].width,
                                                 LayoutParams.WRAP_CONTENT,
                                                 TableCell.IMAGE);
         // 把表格的行添加到表格
         for (int i = 0; i < 12; i++)
             table.add(new TableRow(cells));
         TableAdapter tableAdapter = new TableAdapter(this, table);
         lv.setAdapter(tableAdapter);
         lv.setOnItemClickListener(new ItemClickEvent());
     }
     class ItemClickEvent implements AdapterView.OnItemClickListener {
         @Override
         public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                 long arg3) {
             Toast.makeText(testMyListView.this, "选中第"+String.valueOf(arg2)+"行", 500).show();
         }
     }
 }

ListView自适应实现Table的类TableAdapter.java代码如下：

PS：TableCell是格单元的类，TableRow是表格行的类，TableRowView是实现表格行的组件。实现步骤：TableCell --> TableRow（TableRowView）-->ListView

 package com.testMyListView;
 import java.util.List;
 import android.content.Context;
 import android.graphics.Color;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 public class TableAdapter extends BaseAdapter {
     private Context context;
     private List<TableRow> table;
     public TableAdapter(Context context, List<TableRow> table) {
         this.context = context;
         this.table = table;
     }
     @Override
     public int getCount() {
         return table.size();
     }
     @Override
     public long getItemId(int position) {
         return position;
     }
     public TableRow getItem(int position) {
         return table.get(position);
     }
     public View getView(int position, View convertView, ViewGroup parent) {
         TableRow tableRow = table.get(position);
         return new TableRowView(this.context, tableRow);
     }
     /**
      * TableRowView 实现表格行的样式
      * @author hellogv
      */
     class TableRowView extends LinearLayout {
         public TableRowView(Context context, TableRow tableRow) {
             super(context);

             this.setOrientation(LinearLayout.HORIZONTAL);
             for (int i = 0; i < tableRow.getSize(); i++) {//逐个格单元添加到行
                 TableCell tableCell = tableRow.getCellValue(i);
                 LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                         tableCell.width, tableCell.height);//按照格单元指定的大小设置空间
                 layoutParams.setMargins(0, 0, 1, 1);//预留空隙制造边框
                 if (tableCell.type == TableCell.STRING) {//如果格单元是文本内容
                     TextView textCell = new TextView(context);
                     textCell.setLines(1);
                     textCell.setGravity(Gravity.CENTER);
                     textCell.setBackgroundColor(Color.BLACK);//背景黑色
                     textCell.setText(String.valueOf(tableCell.value));
                     addView(textCell, layoutParams);
                 } else if (tableCell.type == TableCell.IMAGE) {//如果格单元是图像内容
                     ImageView imgCell = new ImageView(context);
                     imgCell.setBackgroundColor(Color.BLACK);//背景黑色
                     imgCell.setImageResource((Integer) tableCell.value);
                     addView(imgCell, layoutParams);
                 }
             }
             this.setBackgroundColor(Color.WHITE);//背景白色，利用空隙来实现边框
         }
     }
     /**
      * TableRow 实现表格的行
      * @author hellogv
      */
     static public class TableRow {
         private TableCell[] cell;
         public TableRow(TableCell[] cell) {
             this.cell = cell;
         }
         public int getSize() {
             return cell.length;
         }
         public TableCell getCellValue(int index) {
             if (index >= cell.length)
                 return null;
             return cell[index];
         }
     }
     /**
      * TableCell 实现表格的格单元
      * @author hellogv
      */
     static public class TableCell {
         static public final int STRING = 0;
         static public final int IMAGE = 1;
         public Object value;
         public int width;
         public int height;
         private int type;
         public TableCell(Object value, int width, int height, int type) {
             this.value = value;
             this.width = width;
             this.height = height;
             this.type = type;
         }
     }
 }