ListView里item加载多种布局文件

国际惯例 先上图



这里加载了3种布局，第一种是checkbox加textview 第二种是textview 第三种是imageview加textview

写3个item布局文件 在main布局里加载一个listview 贴代码

原理就是重写Adapter里面的getView方法。

package com.example.testmixlistview;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

ListView listView;
MyAdapter listAdapter;
ArrayList liststring;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView)this.findViewById(R.id.listview);
liststring = new ArrayList();
for (int i = 0; i < 100; i++) {
liststring.add(Integer.toString(i));
}
listAdapter = new MyAdapter(this);
listView.setAdapter(listAdapter);
}

class MyAdapter extends BaseAdapter {
Context mContext;
LinearLayout linearLayout =null;
LayoutInflater inflater;
TextView tex;

final int VIEW_TYPE =3;
final int TYPE_1 = 0;
final int TYPE_2 = 1;
final int TYPE_3 = 2;

public MyAdapter(Context context) {
mContext = context;
inflater = LayoutInflater.from(mContext);
}

@Override
public int getItemViewType(int position) {
int p = position%6;
if(p == 0)
return TYPE_1;
else if(p < 3)
return TYPE_2;
else if(p < 6)
return TYPE_3;
else
return TYPE_1;
}

@Override
public int getViewTypeCount() {
return 3;
}

@Override
public int getCount() {
return liststring.size();
}

@Override
public Object getItem(int arg0) {
return liststring.get(arg0);
}

@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
viewHolder1 holder1 = null;
viewHolder2 holder2 = null;
viewHolder3 holder3 = null;
int type = getItemViewType(position);

//无convertView，需要new出各个控件
if (convertView == null) {
Log.e("convertView = ", " NULL");

// 按当前所需的样式，确定new的布局
switch (type) {
case TYPE_1:
convertView = inflater.inflate(R.layout.listitem1, parent,
false);
holder1 = new viewHolder1();
holder1.textView = (TextView) convertView
.findViewById(R.id.textview1);
holder1.checkBox = (CheckBox) convertView
.findViewById(R.id.checkbox);
Log.e("convertView = ", "NULL TYPE_1");
convertView.setTag(holder1);
break;
case TYPE_2:
convertView = inflater.inflate(R.layout.listitem2, parent,
false);
holder2 = new viewHolder2();
holder2.textView = (TextView) convertView
.findViewById(R.id.textview2);
Log.e("convertView = ", "NULL TYPE_2");
convertView.setTag(holder2);
break;
case TYPE_3:
convertView = inflater.inflate(R.layout.listitem3, parent,
false);
holder3 = new viewHolder3();
holder3.textView = (TextView) convertView
.findViewById(R.id.textview3);
holder3.imageView = (ImageView) convertView
.findViewById(R.id.imageview);
Log.e("convertView = ", "NULL TYPE_3");
convertView.setTag(holder3);
break;
}
} else {
switch (type) {
case TYPE_1:
holder1 = (viewHolder1) convertView.getTag();
Log.e("convertView !!!!!!= ", "NULL TYPE_1");
break;
case TYPE_2:
holder2 = (viewHolder2) convertView.getTag();
Log.e("convertView !!!!!!= ", "NULL TYPE_2");
break;
case TYPE_3:
holder3 = (viewHolder3) convertView.getTag();
Log.e("convertView !!!!!!= ", "NULL TYPE_3");
break;
}
}

switch (type) {
case TYPE_1:
holder1.textView.setText(Integer.toString(position));
holder1.checkBox.setChecked(true);
break;
case TYPE_2:
holder2.textView.setText(Integer.toString(position));
break;
case TYPE_3:
holder3.textView.setText(Integer.toString(position));
holder3.imageView.setBackgroundResource(R.drawable.ic_launcher);
break;
}

return convertView;
}
}
}

class viewHolder1 {
CheckBox checkBox;
TextView textView;
}

class viewHolder2 {
TextView textView;
}

class viewHolder3 {
ImageView imageView;
TextView textView;

}