listView 实现表格

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ListView自适应实现表格


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


       前次介绍了应用GridView实现表格,此次就说说如何用ListView实现自适应的表格。GridView比ListView更轻易实现自适应的表格,然则GridView每个格单位的大小固定,而ListView实现的表格可以自定义每个格单位的大小,但是以实现自适应表格也会错杂些(格单位大小不一)。别的,GridView实现的表格可以定位在具体某个格单位,而ListView实现的表格则只能定位在表格行。是以还是那句老话:按照具体的应用景象而选择GridView 或者 ListView实现表格。


先贴出本文法度运行的结果图:



本文实现的ListView表格,可以每个格单位大小不一,文本(TextView)或图片(ImageView)做格单位的数据,不须要预先定义XML实现样式(自适应的底子目标)。因为ListView置于HorizontalScrollView中,是以对于列斗劲多/列数据斗劲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个单位          int width = this.getWindowManager().getDefaultDisplay().getWidth()/titles.length;          // 定义题目          forint i = 0; i < titles.length; i++) {              titles[i] = new TableCell("题目" + 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个单位          forint 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          forint 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是格单位的类,TableRow是表格行的类,TableRowView是实现表格行的组件。实现步调: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);              forint i = 0; i < tableRow.getSize(); i++) {//逐个格单位添加到行                  TableCell tableCell = tableRow.getCellValue(i);                  LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(                          tableCell.width, tableCell.height);//遵守格单位指定的大小设置空间                  layoutParams.setMargins(0, 0, 1, 1);//预留空地建造边框                  if (tableCell.type == TableCell.STRING) {//若是格单位是文本内容                      TextView textCell = new TextView(context);                      textCell.setLines(1);                      textCell.setGravity(Gravity.CENTER);                      textCell.setBackgroundColor(Color.BLACK);//靠山黑色                      textCell.setText(String.valueOf(tableCell.value));                      addView(textCell, layoutParams);                  } else if (tableCell.type == TableCell.IMAGE) {//若是格单位是图像内容                      ImageView imgCell = new ImageView(context);                      imgCell.setBackgroundColor(Color.BLACK);//靠山黑色                      imgCell.setImageResource((Integer) tableCell.value);                      addView(imgCell, layoutParams);                  }              }              this.setBackgroundColor(Color.WHITE);//靠山白色,哄骗空地来实现边框          }      }      /**      * 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 实现表格的格单位      * @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;          }      }  }  

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