Android listView每个item设置不同

先看图

在listview 中,我一个item项都不同,这要如何实现呢?

现在弄明白了一点点,就是重写BaseAdapter的getView()方法.在这个方法里去判断.

我们还是要用到Hodler的.我们把所有的不同的item项放在一个item项中.在getView()方法里去判断是否可见,即可.

例子:

1.MainActivity.java

package com.bivin;

import java.util.ArrayList;

import java.util.HashMap;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

public class MainAcitivity extends Activity

{

private ListView lv;

ArrayList<HashMap<String, Object>> datas = new ArrayList<HashMap<String, Object>>();

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

HashMap<String, Object> data;

for (int i = 0; i <30; i++)

{

data = new HashMap<String, Object>();

data.put("name", "name  " + i);

data.put("age", "age  " + i);

data.put("sex", "sex  "+i);

datas.add(data);

}

lv = (ListView) findViewById(R.id.mylv);

Myadapter adapter = new Myadapter(this);

lv.setAdapter(adapter);

}

private class Myadapter extends BaseAdapter

{

private Context context;

public Myadapter(Context context)

{

this.context = context;

}

@Override

public int getCount()

{

return datas.size();

}

@Override

public Object getItem(int position)

{

return datas.get(position);

}

@Override

public long getItemId(int position)

{

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent)

{

ItemHolder holder = null;

if (convertView == null)

{

holder = new ItemHolder();

LayoutInflater inflater =getLayoutInflater();

convertView =inflater.inflate(R.layout.item,null);

holder.tv = (TextView) convertView.findViewById(R.id.name);

holder.tv2 = (TextView) convertView.findViewById(R.id.age);

holder.tv3 = (TextView) convertView.findViewById(R.id.sex);

switch (position)

{

case 0:

holder.tv.setVisibility(View.GONE);

break;

case 1:

holder.tv.setVisibility(View.VISIBLE);

holder.tv2.setVisibility(View.GONE);

break;

case 2:

holder.tv3.setVisibility(View.GONE);

holder.tv2.setVisibility(View.VISIBLE);

break;

default:

holder.tv.setVisibility(View.VISIBLE);

holder.tv2.setVisibility(View.VISIBLE);

holder.tv3.setVisibility(View.VISIBLE);

break;

}

convertView.setTag(holder);

}else {

holder =(ItemHolder)convertView.getTag();

holder.tv.setText(datas.get(position).get("name").toString());

holder.tv2.setText(datas.get(position).get("sex").toString());

holder.tv3.setText(datas.get(position).get("age").toString());

}

return convertView;

}

}

}

2.main.xml

<?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">

<ListView android:layout_width="wrap_content" android:id="@+id/mylv"

android:layout_height="wrap_content" />

<Button android:layout_width="wrap_content" android:id="@+id/mybutton"

android:layout_height="wrap_content" android:text="button" />

</LinearLayout>

3. item.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent" android:layout_height="match_parent"

android:orientation="vertical">

<TextView android:id="@+id/name" android:layout_width="fill_parent"

android:text="name" android:layout_height="wrap_content"></TextView>

<TextView android:layout_height="wrap_content" android:text="age"

android:id="@+id/age" android:layout_width="fill_parent"></TextView>

<TextView android:layout_width="fill_parent" android:text="sex"

android:id="@+id/sex" android:layout_height="wrap_content"></TextView>

</LinearLayout>

结果: