前面有文章介绍了使用gridview实现表格的方法，本文就来说说如何用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(主要由于格单元大小不一)。此外，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。
先来看看本文程序运行的效果图，如下图所示：
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>
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主类testmylistview.java的源码如下：
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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();
}
}
}
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listview自适应实现table的类tableadapter.java代码如下：
此处需要注意：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;
}
}
}
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希望本文所述实例能够对大家进行android项目开发有所帮助。