Android开发ListView中下拉刷新上拉加载及带列的横向滚动实现方法
listview 控件可使用四种不同视图显示项目。通过此控件,可将项目组成带有或不带有列标头的列,并显示伴随的图标和文本。
可使用 listview 控件将称作 listitem 对象的列表条目组织成下列四种不同的视图之一:1.大(标准)图标2.小图标3.列表4.报表 view 属性决定在列表中控件使用何种视图显示项目。
还可用 labelwrap 属性控制列表中与项目关联的标签是否可换行显示。另外,还可管理列表中项目的排序方法和选定项目的外观。
相信有很人做的项目估计都用的到这个。就是listview的下拉刷新上拉加载还有就是列的横向滚动;
ps:横向滚动带表头与固定列(相信蛮多人都有这样的需求吧?就是在listview上支持很多列,然而设备屏幕宽度有限)
ps:这是我个人在网上找的两个示例demo结合而成的一个示例demo,还可以继续拓展,后续有时间就会更新,大家互相学习
listview下拉刷新上拉加载示例demo原文出处:
listview的横向滚动(带表头与固定列)示例demo原文出处:
接下来就是晒一下项目列表图
java代码
布局文件xml
效果图:
横向滚动过的图和下拉刷新,由于不会弄动态图只能这样了
下拉刷新
刷新中
上拉加载
接下来就是上代码了,请往下看
这是自定义重写了listview控件autolistview.java
package com.example.testlistview.widget; import java.text.simpledateformat; import java.util.date; import java.util.locale; import com.example.testlistview.r; import android.content.context; import android.util.attributeset; import android.view.layoutinflater; import android.view.motionevent; import android.view.view; import android.view.viewgroup; import android.view.animation.linearinterpolator; import android.view.animation.rotateanimation; import android.widget.abslistview; import android.widget.imageview; import android.widget.progressbar; import android.widget.textview; import android.widget.abslistview.onscrolllistener; import android.widget.listview; /** * @author * @create * @version 1.0 * @desc 自定义listview�?下拉刷新,上拉加载更多 */ public class autolistview extends listview implements onscrolllistener { // 区分当前操作是刷新还是加�? public static final int refresh = 0; public static final int load = 1; // 区分pull和release的距离的大小 private static final int space = 20; // 定义header的四种状态和当前状�?? private static final int none = 0; private static final int pull = 1; private static final int release = 2; private static final int refreshing = 3; private int state; private layoutinflater inflater; private view header; private view footer; private textview tip; private textview lastupdate; private imageview arrow; private progressbar refreshing; private textview nodata; private textview loadfull; private textview more; private progressbar loading; private rotateanimation animation; private rotateanimation reverseanimation; private int starty; private int firstvisibleitem; private int scrollstate; private int headercontentinitialheight; private int headercontentheight; // 只有在listview第一个item显示的时候(listview滑到了顶部)才进行下拉刷新, 否则此时的下拉只是滑动listview private boolean isrecorded; private boolean isloading;// 判断是否正在加载 private boolean loadenable = true;// �?启或者关闭加载更多功�? private boolean isloadfull; private int pagesize = 10; private onrefreshlistener onrefreshlistener; private onloadlistener onloadlistener; public autolistview(context context) { super(context); initview(context); } public autolistview(context context, attributeset attrs) { super(context, attrs); initview(context); } public autolistview(context context, attributeset attrs, int defstyle) { super(context, attrs, defstyle); initview(context); } // 下拉刷新监听 public void setonrefreshlistener(onrefreshlistener onrefreshlistener) { this.onrefreshlistener = onrefreshlistener; } // 加载更多监听 public void setonloadlistener(onloadlistener onloadlistener) { this.loadenable = true; this.onloadlistener = onloadlistener; } public boolean isloadenable() { return loadenable; } // 这里的开启或者关闭加载更多,并不支持动�?�调�? public void setloadenable(boolean loadenable) { this.loadenable = loadenable; this.removefooterview(footer); } public int getpagesize() { return pagesize; } public void setpagesize(int pagesize) { this.pagesize = pagesize; } // 初始化组�? private void initview(context context) { // 设置箭头特效 animation = new rotateanimation(0, -180, rotateanimation.relative_to_self, 0.5f, rotateanimation.relative_to_self, 0.5f); animation.setinterpolator(new linearinterpolator()); animation.setduration(1000); animation.setfillafter(true); reverseanimation = new rotateanimation(-180, 0, rotateanimation.relative_to_self, 0.5f, rotateanimation.relative_to_self, 0.5f); reverseanimation.setinterpolator(new linearinterpolator()); reverseanimation.setduration(1000); reverseanimation.setfillafter(true); inflater = layoutinflater.from(context); footer = inflater.inflate(r.layout.listview_footer, null); loadfull = (textview) footer.findviewbyid(r.id.loadfull); nodata = (textview) footer.findviewbyid(r.id.nodata); more = (textview) footer.findviewbyid(r.id.more); loading = (progressbar) footer.findviewbyid(r.id.loading); header = inflater.inflate(r.layout.pull_to_refresh_header, null); arrow = (imageview) header.findviewbyid(r.id.arrow); tip = (textview) header.findviewbyid(r.id.tip); lastupdate = (textview) header.findviewbyid(r.id.lastupdate); refreshing = (progressbar) header.findviewbyid(r.id.refreshing); // 为listview添加头部和尾部,并进行初始化 headercontentinitialheight = header.getpaddingtop(); measureview(header); headercontentheight = header.getmeasuredheight(); toppadding(-headercontentheight); this.addheaderview(header); this.addfooterview(footer); this.setonscrolllistener(this); } public void onrefresh() { if (onrefreshlistener != null) { onrefreshlistener.onrefresh(); } } public void onload() { if (onloadlistener != null) { onloadlistener.onload(); } } public void onrefreshcomplete(string updatetime) { lastupdate.settext(this.getcontext().getstring(r.string.lastupdatetime, getcurrenttime())); state = none; refreshheaderviewbystate(); } // 用于下拉刷新结束后的回调 public void onrefreshcomplete() { string currenttime = getcurrenttime(); onrefreshcomplete(currenttime); } // 用于加载更多结束后的回调 public void onloadcomplete() { isloading = false; } @override public void onscroll(abslistview view, int firstvisibleitem, int visibleitemcount, int totalitemcount) { this.firstvisibleitem = firstvisibleitem; } @override public void onscrollstatechanged(abslistview view, int scrollstate) { this.scrollstate = scrollstate; ifneedload(view, scrollstate); } // 根据listview滑动的状态判断是否需要加载更�? private void ifneedload(abslistview view, int scrollstate) { if (!loadenable) { return; } try { if (scrollstate == onscrolllistener.scroll_state_idle && !isloading && view.getlastvisibleposition() == view.getpositionforview(footer) && !isloadfull) { onload(); isloading = true; } } catch (exception e) { } } /** * 监听触摸事件,解读手�? */ @override public boolean ontouchevent(motionevent ev) { switch (ev.getaction()) { // case motionevent.action_down: // if (firstvisibleitem == 0) { // isrecorded = true; // starty = (int) ev.gety(); // } // break; case motionevent.action_cancel: case motionevent.action_up: if (state == pull) { state = none; refreshheaderviewbystate(); } else if (state == release) { state = refreshing; refreshheaderviewbystate(); onrefresh(); } isrecorded = false; break; case motionevent.action_move: whenmove(ev); break; } return super.ontouchevent(ev); } @override public boolean onintercepttouchevent(motionevent ev) { if (ev.getaction() == motionevent.action_down) { if (firstvisibleitem == 0) { isrecorded = true; starty = (int) ev.gety(); } } return super.onintercepttouchevent(ev); } // 解读手势,刷新header状�?? private void whenmove(motionevent ev) { if (!isrecorded) { return; } int tmpy = (int) ev.gety(); int space = tmpy - starty; int toppadding = space - headercontentheight; switch (state) { case none: if (space > 0) { state = pull; refreshheaderviewbystate(); } break; case pull: toppadding(toppadding); if (scrollstate == scroll_state_touch_scroll && space > headercontentheight + space) { state = release; refreshheaderviewbystate(); } break; case release: toppadding(toppadding); if (space > 0 && space < headercontentheight + space) { state = pull; refreshheaderviewbystate(); } else if (space <= 0) { state = none; refreshheaderviewbystate(); } break; } } // 调整header的大小�?�其实调整的只是距离顶部的高度�?? private void toppadding(int toppadding) { header.setpadding(header.getpaddingleft(), toppadding, header.getpaddingright(), header.getpaddingbottom()); header.invalidate(); } /** * 这个方法是根据结果的大小来决定footer显示的�?? * <p> * 这里假定每次请求的条数为10。如果请求到�?10条�?�则认为还有数据。如过结果不�?10条,则认为数据已经全部加载, * 这时footer显示已经全部加载 * </p> * * @param resultsize */ public void setresultsize(int resultsize) { if (resultsize == 0) { isloadfull = true; loadfull.setvisibility(view.gone); loading.setvisibility(view.gone); more.setvisibility(view.gone); nodata.setvisibility(view.visible); } else if (resultsize > 0 && resultsize < pagesize) { isloadfull = true; loadfull.setvisibility(view.visible); loading.setvisibility(view.gone); more.setvisibility(view.gone); nodata.setvisibility(view.gone); } else if (resultsize == pagesize) { isloadfull = false; loadfull.setvisibility(view.gone); loading.setvisibility(view.visible); more.setvisibility(view.visible); nodata.setvisibility(view.gone); } } // 根据当前状�?�,调整header private void refreshheaderviewbystate() { switch (state) { case none: toppadding(-headercontentheight); tip.settext(r.string.pull_to_refresh); refreshing.setvisibility(view.gone); arrow.clearanimation(); arrow.setimageresource(r.drawable.pull_to_refresh_arrow); break; case pull: arrow.setvisibility(view.visible); tip.setvisibility(view.visible); lastupdate.setvisibility(view.visible); refreshing.setvisibility(view.gone); tip.settext(r.string.pull_to_refresh); arrow.clearanimation(); arrow.setanimation(reverseanimation); break; case release: arrow.setvisibility(view.visible); tip.setvisibility(view.visible); lastupdate.setvisibility(view.visible); refreshing.setvisibility(view.gone); tip.settext(r.string.pull_to_refresh); tip.settext(r.string.release_to_refresh); arrow.clearanimation(); arrow.setanimation(animation); break; case refreshing: toppadding(headercontentinitialheight); refreshing.setvisibility(view.visible); arrow.clearanimation(); arrow.setvisibility(view.gone); tip.setvisibility(view.gone); lastupdate.setvisibility(view.gone); break; } } // 用来计算header大小的�?�比较隐晦�?�因为header的初始高度就�?0,貌似可以不用�? private void measureview(view child) { viewgroup.layoutparams p = child.getlayoutparams(); if (p == null) { p = new viewgroup.layoutparams(viewgroup.layoutparams.match_parent, viewgroup.layoutparams.wrap_content); } int childwidthspec = viewgroup.getchildmeasurespec(0, 0 + 0, p.width); int lpheight = p.height; int childheightspec; if (lpheight > 0) { childheightspec = measurespec.makemeasurespec(lpheight, measurespec.exactly); } else { childheightspec = measurespec.makemeasurespec(0, measurespec.unspecified); } child.measure(childwidthspec, childheightspec); } /* * 定义下拉刷新接口 */ public interface onrefreshlistener { public void onrefresh(); } /* * 定义加载更多接口 */ public interface onloadlistener { public void onload(); } public string getcurrenttime(string format) { date date = new date(); simpledateformat sdf = new simpledateformat(format, locale.getdefault()); string currenttime = sdf.format(date); return currenttime; } public string getcurrenttime() { return getcurrenttime("yyyy-mm-dd hh:mm:ss"); } }
这是自定义horizontalscrollview的重写 chscrollview.java
package com.example.testlistview.widget; import java.util.arraylist; import java.util.list; import com.example.testlistview.widget.chscrollview.chscrollviewhelper; import android.content.context; import android.util.attributeset; import android.util.log; import android.view.motionevent; import android.widget.horizontalscrollview; import android.widget.toast; public class chscrollview extends horizontalscrollview { private context context; float startx = 0; float offset; public chscrollview(context context, attributeset attrs, int defstyle) { super(context, attrs, defstyle); this.context = context; } public chscrollview(context context, attributeset attrs) { super(context, attrs); this.context = context; } public chscrollview(context context) { super(context); this.context = context; } @override public boolean ontouchevent(motionevent ev) { // 进行触摸赋值 chscrollviewhelper.mtouchview = this; return super.ontouchevent(ev); } @override protected void onscrollchanged(int l, int t, int oldl, int oldt) { // 当当前的chscrollview被触摸时,滑动其它 if (chscrollviewhelper.mtouchview == this) { onscrollchanged(l, t, oldl, oldt, 0); } else { super.onscrollchanged(l, t, oldl, oldt); } } public void onscrollchanged(int l, int t, int oldl, int oldt, int none) { for (chscrollview scrollview : chscrollviewhelper.mhscrollviews) { // 防止重复滑动 if (chscrollviewhelper.mtouchview != scrollview) scrollview.smoothscrollto(l, t); } } public static class chscrollviewhelper { public static horizontalscrollview mtouchview; public static list<chscrollview> mhscrollviews = new arraylist<chscrollview>(); public static void addhviews(final chscrollview hscrollview, autolistview autolistview) { if (!chscrollviewhelper.mhscrollviews.isempty()) { int size = chscrollviewhelper.mhscrollviews.size(); chscrollview scrollview = chscrollviewhelper.mhscrollviews.get(size - 1); final int scrollx = scrollview.getscrollx(); // 第一次满屏后,向下滑动,有一条数据在开始时未加入 if (scrollx != 0) { autolistview.post(new runnable() { @override public void run() { // 当listview刷新完成之后,把该条移动到最终位置 hscrollview.scrollto(scrollx, 0); } }); } } chscrollviewhelper.mhscrollviews.add(hscrollview); } } }
这是listview的适配器adapter ,listviewscrolladapter.java
package com.example.testlistview.adapter; import java.util.list; import java.util.map; import com.example.testlistview.r; import com.example.testlistview.widget.autolistview; import com.example.testlistview.widget.chscrollview; import com.example.testlistview.widget.chscrollview.chscrollviewhelper; import android.content.context; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.simpleadapter; import android.widget.textview; public class listviewscrolladapter extends simpleadapter { private list<? extends map<string, ?>> datas; private int res; private string[] from; private int[] to; private context context; private int resscroll; private autolistview lstv; public listviewscrolladapter(context context, list<? extends map<string, ?>> data, int resource, string[] from, int[] to, int resourceitem,autolistview autolistview) { super(context, data, resource, from, to); this.context = context; this.datas = data; this.res = resource; this.from = from; this.to = to; this.resscroll = resourceitem; this.lstv = autolistview; } @override public int getcount() { return this.datas.size(); } @override public view getview(int position, view convertview, viewgroup parent) { view v = convertview; if (v == null) { v = layoutinflater.from(context).inflate(res, null); // 第一次初始化的时候装进来 chscrollviewhelper.addhviews((chscrollview) v.findviewbyid(resscroll), lstv); view[] views = new view[to.length]; for (int i = 0; i < to.length; i++) { view tv = v.findviewbyid(to[i]); views[i] = tv; } v.settag(views); } v.setbackgroundresource(r.drawable.selector_bg_white_gray); view[] holders = (view[]) v.gettag(); int len = holders.length; for (int i = 0; i < len; i++) { ((textview) holders[i]).settext(this.datas.get(position).get(from[i]).tostring()); } return v; } public context getcontext() { return context; } }
这是mainactivity.java
package com.example.testlistview; import android.os.bundle; import android.os.handler; import android.os.message; import android.view.view; import android.widget.adapterview.onitemclicklistener; import android.widget.adapterview; import android.widget.textview; import android.widget.toast; import java.util.arraylist; import java.util.hashmap; import java.util.list; import java.util.map; import com.example.testlistview.widget.autolistview.onloadlistener; import com.example.testlistview.widget.autolistview.onrefreshlistener; import com.example.testlistview.r; import com.example.testlistview.adapter.listviewscrolladapter; import com.example.testlistview.widget.autolistview; import com.example.testlistview.widget.chscrollview; import com.example.testlistview.widget.chscrollview.chscrollviewhelper; import android.annotation.suppresslint; import android.app.activity; public class mainactivity extends activity implements onrefreshlistener, onloadlistener, onitemclicklistener { private autolistview lstv; private chscrollview headerscroll; list<map<string, string>> list = new arraylist<map<string, string>>(); private listviewscrolladapter adapter; @suppresslint("handlerleak") private handler handler = new handler() { @suppresswarnings("unchecked") public void handlemessage(message msg) { list<map<string, string>> result = (list<map<string, string>>) msg.obj; switch (msg.what) { case autolistview.refresh: lstv.onrefreshcomplete(); list.clear(); list.addall(result); break; case autolistview.load: lstv.onloadcomplete(); list.addall(result); break; } lstv.setresultsize(result.size()); adapter.notifydatasetchanged(); }; }; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); initview(); initdata(); } private void initview() { headerscroll = (chscrollview) findviewbyid(r.id.item_scroll_title); chscrollviewhelper.mhscrollviews.clear(); // 添加头滑动事件 chscrollviewhelper.mhscrollviews.add(headerscroll); lstv = (autolistview) findviewbyid(r.id.scroll_list); adapter = new listviewscrolladapter(this, list, r.layout.auto_listview_item, new string[] { "title", "data_1", "data_2", "data_3", "data_4", "data_5", "data_6", }, new int[] { r.id.item_title, r.id.item_data1, r.id.item_data2, r.id.item_data3, r.id.item_data4, r.id.item_data5, r.id.item_data6 }, r.id.item_scroll, lstv); lstv.setadapter(adapter); lstv.setonrefreshlistener(this); lstv.setonloadlistener(this); lstv.setonitemclicklistener(this); } private void initdata() { loaddata(autolistview.refresh); } private void loaddata(final int what) { // 这里模拟从服务器获取数据 new thread(new runnable() { @override public void run() { try { thread.sleep(700); } catch (interruptedexception e) { e.printstacktrace(); } message msg = handler.obtainmessage(); msg.what = what; msg.obj = getdata(); handler.sendmessage(msg); } }).start(); } @override public void onrefresh() { loaddata(autolistview.refresh); } @override public void onload() { loaddata(autolistview.load); } @override public void onitemclick(adapterview<?> arg0, view arg1, int arg2, long arg3) { try { textview textview = (textview) arg1.findviewbyid(r.id.item_data2); toast.maketext(this, "你点击了:" + textview.gettext(), toast.length_short).show(); } catch (exception ex) { } } // 测试数据 public list<map<string, string>> getdata() { list<map<string, string>> result = new arraylist<map<string, string>>(); map<string, string> data = null; for (int i = 0; i < 10; i++) { data = new hashmap<string, string>(); data.put("title", "title_" + i); data.put("data_" + 1, "date_" + 1 + "_" + i); data.put("data_" + 2, "date_" + 2 + "_" + i); data.put("data_" + 3, "date_" + 3 + "_" + i); data.put("data_" + 4, "date_" + 4 + "_" + i); data.put("data_" + 5, "date_" + 5 + "_" + i); data.put("data_" + 6, "date_" + 6 + "_" + i); result.add(data); } return result; } }
这是layout布局文件 activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <linearlayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#ccc" android:minheight="40dip" android:orientation="horizontal" > <textview android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="2" android:gravity="center" android:text="表头测试" android:textcolor="#850" /> <com.example.testlistview.widget.chscrollview android:id="@+id/item_scroll_title" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" android:scrollbars="none" > <linearlayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" > <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date1" android:textcolor="#850" /> <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date2" android:textcolor="#850" /> <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date3" android:textcolor="#850" /> <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date4" android:textcolor="#850" /> <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date5" android:textcolor="#850" /> <textview android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:text="date6" android:textcolor="#850" /> </linearlayout> </com.example.testlistview.widget.chscrollview> </linearlayout> <com.example.testlistview.widget.autolistview android:id="@+id/scroll_list" android:layout_width="match_parent" android:layout_height="fill_parent" android:cachecolorhint="@android:color/transparent" /> </linearlayout>
auto_listview_item.xml布局文件 listview的item布局文件
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:descendantfocusability="blocksdescendants" android:minheight="50dip" android:orientation="horizontal" > <textview android:id="@+id/item_title" android:layout_width="fill_parent" android:layout_height="match_parent" android:layout_weight="2" android:gravity="center" android:text="表头测试" /> <com.example.testlistview.widget.chscrollview android:id="@+id/item_scroll" android:layout_width="fill_parent" android:layout_height="match_parent" android:layout_weight="1" android:focusable="false" android:scrollbars="none" > <linearlayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" > <textview android:id="@+id/item_data1" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#011" /> <textview android:id="@+id/item_data2" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#191" /> <textview android:id="@+id/item_data3" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#101" /> <textview android:id="@+id/item_data4" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#111" /> <textview android:id="@+id/item_data5" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#071" /> <textview android:id="@+id/item_data6" android:layout_width="100dip" android:layout_height="fill_parent" android:gravity="center" android:textcolor="#910" /> </linearlayout> </com.example.testlistview.widget.chscrollview> </linearlayout>
listview底部提示正在加载中的布局文件 listview_footer.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="wrap_content" android:gravity="center" android:orientation="horizontal" > <textview android:id="@+id/loadfull" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:padding="5dp" android:text="@string/load_full" android:visibility="gone" /> <textview android:id="@+id/nodata" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:padding="5dp" android:text="@string/no_data" android:visibility="gone" /> <textview android:id="@+id/more" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:padding="5dp" android:text="@string/more" /> <progressbar android:id="@+id/loading" style="@style/customprogressbar" /> </linearlayout>
listview顶部提示下拉刷新的一些状态布局xml文件 pull_to_refresh_header.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:gravity="center" android:orientation="vertical" > <relativelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingbottom="5dp" > <linearlayout android:id="@+id/layout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerhorizontal="true" android:layout_centervertical="true" android:orientation="vertical" > <progressbar android:id="@+id/refreshing" style="@style/customprogressbar" /> <textview android:id="@+id/tip" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> <textview android:id="@+id/lastupdate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textsize="12sp" /> </linearlayout> <imageview android:id="@+id/arrow" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centervertical="true" android:layout_marginright="20dp" android:layout_toleftof="@id/layout" android:contentdescription="@string/d" android:src="@drawable/pull_to_refresh_arrow" /> </relativelayout> <imageview android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/h_line" android:contentdescription="@string/d" /> </linearlayout> <uses-sdk android:minsdkversion="8" android:targetsdkversion="15" />
android编译和目标版本是4.0.3
以上所述是小编给大家介绍的android开发listview中下拉刷新上拉加载及带列的横向滚动实现方法,希望对大家有所帮助
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