前面有文章介紹了使用GridView實現表格的方法，本文就來說說如何用ListView實現自適應的表格。GridView比ListView更容易實現自適應的表格，但是GridView每個格單元的大小固定，而ListView實現的表格可以自定義每個格單元的大小，但因此實現自適應表格也會復雜些(主要由于格單元大小不一)。此外，GridView實現的表格可以定位在具體某個格單元，而ListView實現的表格則只能定位在表格行。因此還是那句老話：根據具體的使用環境而選擇GridView 或者 ListView實現表格。
先來看看本文程序運行的效果圖，如下圖所示：
本文實現的ListView表格，可以每個格單元大小不一，文本(TextView)或圖片(ImageView)做格單元的數據，不需要預先定義XML實現樣式(自適應的根本目標)。由于ListView置于HorizontalScrollView中，因此對于列比較多/列數據比較長的數據表也能很好地適應其寬度。
main.xml源碼如下：
<?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>
主類testMyListView.java的源碼如下：
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自適應實現表格---hellogv"); lv = (ListView) this.findViewById(R.id.ListView01); ArrayList<TableRow> table = new ArrayList<TableRow>(); TableCell[] titles = new TableCell[5];// 每行5個單元 int width = this.getWindowManager().getDefaultDisplay().getWidth()/titles.length; // 定義標題 for (int i = 0; i < titles.length; i++) { titles[i] = new TableCell("標題" + String.valueOf(i), width + 8 * i, LayoutParams.FILL_PARENT, TableCell.STRING); } table.add(new TableRow(titles)); // 每行的數據 TableCell[] cells = new TableCell[5];// 每行5個單元 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, "選中第"+String.valueOf(arg2)+"行", 500).show(); } }}ListView自適應實現Table的類TableAdapter.java代碼如下：
此處需要注意：TableCell是格單元的類，TableRow是表格行的類，TableRowView是實現表格行的組件。實現步驟：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 實現表格行的樣式 * @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++) {//逐個格單元添加到行 TableCell tableCell = tableRow.getCellValue(i); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( tableCell.width, tableCell.height);//按照格單元指定的大小設置空間 layoutParams.setMargins(0, 0, 1, 1);//預留空隙制造邊框 if (tableCell.type == TableCell.STRING) {//如果格單元是文本內容 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) {//如果格單元是圖像內容 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，利用空隙來實現邊框 } } /** * TableRow 實現表格的行 * @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 實現表格的格單元 * @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; } }}希望本文所述實例能夠對大家進行Android項目開發有所幫助。
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