列标头固定的联系人列表
来源:互联网 发布:数据库关系代数 编辑:程序博客网 时间:2024/06/05 01:59
项目中有一新的需求,要求能像一些Android机带“联系人列表”一样,数据可以自动分组,且在列表滑动过程中,列表头固定在顶部,效果图如下:
下面就带大家实现上面的效果, 首先,我们要介绍的一个重要的开源库:StickyListHeaders,它的Github地址是:https://github.com/emilsjolander/StickyListHeaders, 使用该库,可以更加方便的实现ListView数据分组,且Header固定在顶部。
首先,把github上的项目下载下来,加压后,可看到其中有一个library库,我们需要将该库(Module)导入到新建的项目中,并在自己的Module引入该Library。
项目建成后,开始使用该库进行开发:
1. 布局中引入StickyListHeadersListView:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- tools:context=".MainActivity">
-
- <se.emilsjolander.stickylistheaders.StickyListHeadersListView
- android:id="@+id/list"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:cacheColorHint="#00000000"
- android:clipToPadding="false"
- android:drawSelectorOnTop="true"
- android:fastScrollEnabled="true"
- android:listSelector="#00000000"
- android:overScrollMode="never"
- android:scrollbarStyle="outsideOverlay" />
-
- </RelativeLayout>
2. 创建要显示的数据实体
- public class LangyaSimple {
-
- private String id;
- private String proj_id;
- private String title;
- private String desc;
- private String project_title;
-
- public LangyaSimple(String id, String proj_id, String title, String desc, String project_title) {
- this.id = id;
- this.proj_id = proj_id;
- this.title = title;
- this.desc = desc;
- this. = project_title;
- }
-
- public String getId() {
- return id;
- }
-
- public void setId(String id) {
- this.id = id;
- }
-
- public String getProj_id() {
- return proj_id;
- }
-
- public void setProj_id(String proj_id) {
- this.proj_id = proj_id;
- }
-
- public String getTitle() {
- return title;
- }
-
- public void setTitle(String title) {
- this.title = title;
- }
-
- public String getDesc() {
- return desc;
- }
-
- public void setDesc(String desc) {
- this.desc = desc;
- }
-
- public String getProject_title() {
- return project_title;
- }
-
- public void setProject_title(String project_title) {
- this.project_title = project_title;
- }
-
- @Override
- public String toString() {
- return "LangyaSimple{" +
- "id='" + id + '\'' +
- ", proj_id='" + proj_id + '\'' +
- ", title='" + title + '\'' +
- ", desc='" + desc + '\'' +
- ", project_title='" + project_title + '\'' +
- '}';
- }
- }
注: id是data数据的id,proj_id是该数据所属的组的意思,proj_title是该组的名字;
3. 定义StickyListHeadersListView要显示的适配器:
适配器是List数据显示最重要的部分,为了实现数据分组,该适配器必须要实现StickyListHeadersAdapter接口,并重写其中的getHeaderView(int position, View convertView, ViewGroup parent);和long getHeaderId(int position);方法。 说明:
getHeaderView方法指定了Header的View的显示;
getHeaderId决定header出现的时机,如果当前的headerid和前一个headerid不同时,就会显示。
4. 定义数据显示的Activity:
- import android.app.Activity;
- import android.os.Bundle;
- import android.util.Log;
- import android.view.View;
- import android.widget.AdapterView;
-
- import java.util.ArrayList;
- import java.util.List;
-
- import se.emilsjolander.stickylistheaders.StickyListHeadersListView;
-
- public class MainActivity extends Activity {
-
- public StickyListHeadersListView list;
-
- private LangyaAdapter langyaAdapter;
-
- private List<LangyaSimple> mLangyaDatas;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
-
- list = (StickyListHeadersListView) findViewById(R.id.list);
- mLangyaDatas = new ArrayList<LangyaSimple>();
-
- initDatas();
-
- list.setOnItemClickListener(new OnPlanItemClick());
- list.setOnItemLongClickListener(new OnPlanItemLongClick());
-
- langyaAdapter = new LangyaAdapter(this, mLangyaDatas);
- list.setAdapter(langyaAdapter);
-
- }
-
- private void updateData() {
-
- if (langyaAdapter != null && mLangyaDatas != null) {
-
- langyaAdapter.notifyDataSetChanged();
- }
- }
-
- private class OnPlanItemClick implements AdapterView.OnItemClickListener {
-
- @Override
- public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
- LangyaSimple oLangyaSimple = (LangyaSimple) parent.getAdapter().getItem(
- position);
- Log.e("tag", oLangyaSimple.toString());
- }
- }
-
- private class OnPlanItemLongClick implements AdapterView.OnItemLongClickListener {
-
- @Override
- public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
-
- LangyaSimple oLangyaSimple = mLangyaDatas.get(position);
-
- Log.e("tag", oLangyaSimple.toString());
-
- mLangyaDatas.remove(oLangyaSimple);
-
- updateData();
-
- return true;
- }
- }
-
- private void initDatas() {
-
- mLangyaDatas.add(new LangyaSimple("1", "1", "无缘公子", "无缘公子无缘公子无缘公子无缘公子", "公子榜"));
- mLangyaDatas.add(new LangyaSimple("2", "1", "无请公子", "无请公子无请公子无请公子无请公子", "公子榜"));
- mLangyaDatas.add(new LangyaSimple("3", "1", "无名公子", "无名公子无名公子无名公子无名公子", "公子榜"));
- mLangyaDatas.add(new LangyaSimple("4", "1", "无非公子", "无非公子无非公子无非公子无非公子", "公子榜"));
- mLangyaDatas.add(new LangyaSimple("5", "1", "无能公子", "无能公子无能公子无能公子无能公子", "公子榜"));
-
- mLangyaDatas.add(new LangyaSimple("6", "2", "最无情", "最无情最无情最无情最无情最无情", "高手榜"));
- mLangyaDatas.add(new LangyaSimple("7", "2", "最无情", "最无情最无情最无情最无情最无情", "高手榜"));
- mLangyaDatas.add(new LangyaSimple("8", "2", "最无情", "最无情最无情最无情最无情最无情", "高手榜"));
- mLangyaDatas.add(new LangyaSimple("9", "2", "最无情", "最无情最无情最无情最无情最无情", "高手榜"));
- mLangyaDatas.add(new LangyaSimple("10", "2", "最无情", "最无情最无情最无情最无情最无情", "高手榜"));
-
- mLangyaDatas.add(new LangyaSimple("11", "3", "情殇", "情殇情殇情殇情殇情殇情殇情殇", "美人榜"));
- mLangyaDatas.add(new LangyaSimple("12", "3", "情殇", "情殇情殇情殇情殇情殇情殇情殇", "美人榜"));
- mLangyaDatas.add(new LangyaSimple("13", "3", "情殇", "情殇情殇情殇情殇情殇情殇情殇", "美人榜"));
- mLangyaDatas.add(new LangyaSimple("14", "3", "情殇", "情殇情殇情殇情殇情殇情殇情殇", "美人榜"));
- mLangyaDatas.add(new LangyaSimple("15", "3", "情殇", "情殇情殇情殇情殇情殇情殇情殇", "美人榜"));
- }
- }
该Activity实现了较多的方法,1. 数据显示, 2. 列表的单机事件, 3. 列表的长按事件, 4. 数据更新等;有个地方需要着重说明,那就是在初始化数据时,数据必须proj_id必须按分组排列,即,不要将proj_id不同的数据参差着放在集合中,否则容易造成列表显示多组相同组名的数据。
对StickyListHeadersListView其余的操作(点击、长按),和普通的ListView一致,包括在xml中设置的属性也是一致的。
如此这般,便可实现上述的效果了!
源码下载地址(免费):http://download.csdn.net/detail/zuiwuyuan/9274693
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