Android中自定义ListView

1. 自定义ListView，效果图：



2. 代码实现：

（1）res/layout/main.xml实现：

]<?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"
>

<com.focus.fishme.SelfListView
android:id="@+id/ListView"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>

</LinearLayout>

（2）ListView的Item布局实现：

]<?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"
>

<TextView
android:id = "@+id/TextViewOne"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_marginLeft = "10dip"
android:textSize  =  "24sp"
/>

<TextView
android:id = "@+id/TextViewTwo"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_marginLeft = "10dip"
/>

<View
android:layout_height = "1dip"
android:layout_width = "fill_parent"
android:background = "#FF0000"
/>

</LinearLayout>

（3）主Activity实现：

]package com.focus.fishme;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;

public class SelfListViewActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

/**
* 设置主布局。
*/
setContentView(R.layout.main);

/**
* ListView数据集。
*/
List<Map<String , Object>> mSelfData = new ArrayList<Map<String,Object>>();

/**
* 获取ListView组件。
*/
SelfListView mSelfListView = (SelfListView) findViewById(R.id.ListView);

/**
* 生成数据。
*/
for (int i = 0; i < 10; i++) {
HashMap<String, Object> mMap = new HashMap<String, Object>();
mMap.put("key_name", "name" + i);
mMap.put("value_name", "value" + i);
mSelfData.add(mMap);
}

/**
* 自定义Adapter。
*/
final SelfAdapter mSelfAdapter = new SelfAdapter(this, mSelfData,
R.layout.item, new String[] { "key_name", "value_name" }, new int[] { R.id.TextViewOne, R.id.TextViewTwo });

/**
* 向ListView设置Adapter。
*/
mSelfListView.setSelfAdapter(mSelfAdapter);
}

}

（4）ListView所用Adapter实现：

]package com.focus.fishme;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class SelfAdapter extends BaseAdapter {

private LayoutInflater mLayoutInflater;

private int mResource;
private List<? extends Map<String, ?>> mSelfData;
private String[] from;
private int[] to;

public SelfAdapter(Context context, List<? extends Map<String, ?>> data, int resouce, String[] from, int[] to) {
this.mSelfData = data;
this.mResource = resouce;
this.mSelfData = data;
this.from = from;
this.to = to;
this.mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

public int getCount() {
return mSelfData.size();
}

public Object getItem(int position) {
return mSelfData.get(position);
}

public String get(int position, Object key) {
Map<String, ?> map = (Map<String, ?>) getItem(position);
return map.get(key).toString();
}

public long getItemId(int position) {
return position;
}

/**
* 生成ListView的Item布局。
*/
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mLayoutInflater.inflate(mResource, null);
}

Map<String, ?> item = mSelfData.get(position);

int count = to.length;

for (int i = 0; i < count; i++) {
View v = convertView.findViewById(to[i]);
bindView(v, item, from[i]);
}

convertView.setTag(position);

return convertView;
}

private void bindView(View view, Map<String, ?> item, String from) {
Object data = item.get(from);

if (view instanceof TextView) {
((TextView) view).setText(data == null ? "" : data.toString());
}
}

}

（5）自定义ListView实现：

]package com.focus.fishme;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

public class SelfListView extends LinearLayout {

private BaseAdapter mSelfAdapter;

public SelfListView(Context context) {
super(context);
}

public SelfListView(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
}

/**
* 删除ListView中上一次渲染的View，并添加新View。
*/
private void buildList() {
if (mSelfAdapter == null) {

}

if (getChildCount() > 0) {
removeAllViews();
}

int count = mSelfAdapter.getCount();

for(int i = 0 ; i < count ; i++) {
View view = mSelfAdapter.getView(i, null, null);
if (view != null) {
addView(view, i);
}
}
}

public BaseAdapter getSelfAdapter() {
return mSelfAdapter;
}

/**
* 设置Adapter。
*
* @param selfAdapter
*/
public void setSelfAdapter(BaseAdapter selfAdapter) {
this.mSelfAdapter = selfAdapter;
buildList();
}

}