Android入门教程(三十三)------之ListView自适应实现表格(转)
2011-08-11 14:07
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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:
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<?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>
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
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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;
}
}
}
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:
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<?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>
view plaincopy to clipboardprint? 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(); } } } 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
view plaincopy to clipboardprint?
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;
}
}
}
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