Android实现多级列表中的新建功能
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2023-02-21 21:15:16
本文实例为大家分享了android实现多级列表中的新建功能,供大家参考,具体内容如下
多级列表的页面实现比较简单,所以把新建的功能拿出来了。
窗口代码
/**...
本文实例为大家分享了android实现多级列表中的新建功能,供大家参考,具体内容如下
多级列表的页面实现比较简单,所以把新建的功能拿出来了。
窗口代码
/** * 新建一个第一级列表的条目 * 1.选择图片和附件都用intent.action_get_content实现 * 2.打开文件用intent.action_view实现 * 3.回传的uri需要转化成真实路径 * 4.提交数据之后需要刷新列表 */ public class sectionnewactivity extends appcompatactivity implements view.onclicklistener { private static final string tag = "sectionnewactivity"; @bindview(r.id.tv_title_middle) textview title; @bindview(r.id.title_left) imageview back; @bindview(r.id.edit_tv) textview edit; @bindview(r.id.filter_tv) textview filter; @bindview(r.id.section_new_logo) imageview sectionlogo; @bindview(r.id.section_new_manager) textview sectionmanager; @bindview(r.id.section_new_title) textview sectiontitle; @bindview(r.id.section_new_desc) textview sectiondesc; @bindview(r.id.tv_upload_attach) textview selectattach; @bindview(r.id.lv_attach) listview mlistview; private context mcontext; private list<clsattachment> mattachlist; private attachmentlistadapter madapter; @override protected void oncreate(@nullable bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_section_new); butterknife.bind(this); initview(); initdata(); initlistener(); } private void initdata() { mcontext = this; //初始化数据源 mattachlist = new arraylist<>(); madapter = new attachmentlistadapter(mattachlist, mcontext); mlistview.setadapter(madapter); } private void initview() { title.settext("新建板块"); edit.setvisibility(view.visible); edit.setcompounddrawableswithintrinsicbounds(r.drawable.ic_send_black_24dp, 0, 0, 0); } private void initlistener() { back.setonclicklistener(this); edit.setonclicklistener(this); filter.setonclicklistener(this); sectionlogo.setonclicklistener(this); sectionmanager.setonclicklistener(this); selectattach.setonclicklistener(this); //点击附件列表条目的删除按钮,删除对应附件 madapter.setmcallback((view, position) -> { mattachlist.remove(position); madapter.notifydatasetchanged(); }); //点击附件列表弹出打开方式 mlistview.setonitemclicklistener((parent, view, position, id) -> { clsattachment clsattachment = mattachlist.get(position); intent intent = new intent(); intent.addflags(intent.flag_activity_new_task); intent.setaction(intent.action_view); intent.setdataandtype(uri.parse(clsattachment.geturi()), "*/*"); startactivity(intent); }); } @override public void onclick(view v) { if (v.getid() == r.id.title_left) { finish(); } if (v.getid() == r.id.edit_tv) { submit(); } if (v.getid() == r.id.section_new_logo) { //打开手机原生的文件管理器,并且选取内容 intent intent = new intent(intent.action_get_content); intent.addcategory(intent.category_openable); //文件类型为图片 intent.settype("image/*"); startactivityforresult(intent, 16352); } if (v.getid() == r.id.section_new_manager) { intent intent = new intent(mcontext, userselectactivity.class); startactivityforresult(intent, 12345); } if (v.getid() == r.id.tv_upload_attach) { //上传的附件数量不能超过4个 if (mattachlist.size() < 4) { intent intent = new intent(intent.action_get_content); intent.addcategory(intent.category_openable); intent.settype("*/*"); startactivityforresult(intent, 12367); if (mattachlist.size() == 0) { toast.maketext(mcontext, r.string.upload_warning, toast.length_long).show(); } } else { toast.maketext(mcontext, "附件数量已达上限!", toast.length_short).show(); } } } private void submit() { toast.maketext(mcontext, "在此处调用接口!", toast.length_short).show(); finish(); } @override //requestcode要对应上,resultcode都为默认值result_ok protected void onactivityresult(int requestcode, int resultcode, intent data) { //选择图片完成之后使用glide加载到控件上,此处有时需要把图片上传给后台 //提交数据的时候传图片在后台的路径 if (requestcode == 16352 && resultcode == result_ok) { glide.with(mcontext).load(data.getdata()).into(sectionlogo); } //打开选择用户的页面,根据传的参数不同页面也不同,默认是单选页面 if (requestcode == 12345 && resultcode == result_ok) { clsnormaluser user = data.getparcelableextra("user"); sectionmanager.settext(user.getcname()); } //遍历已经上传的附件列表,如果已经存在就弹出提示 if (requestcode == 12367 && resultcode == result_ok) { string uri = data.getdata().tostring(); if (mattachlist.size() > 0) { for (int i = 0; i < mattachlist.size(); i++) { if (uri.equals(mattachlist.get(i).geturi())) { toast.maketext(mcontext, "请选择不同文件!", toast.length_short).show(); break; } if (i == mattachlist.size() - 1) { addattach(data); break; } } } else { addattach(data); } } super.onactivityresult(requestcode, resultcode, data); } private void addattach(intent data) { //这里使用第三方库ucrop的getpath方法,也可以自己实现uri转换为path file file = new file(getpath(mcontext, data.getdata())); clsattachment clsattachment = new clsattachment(); string name = file.getname(); string type = name.split("\\.")[1]; string size = file.length() + ""; clsattachment.setsize(size); clsattachment.setfilename(name); clsattachment.seturi(data.getdata().tostring()); //这里需要调用上传接口 uploadfile(file.getpath()); mattachlist.add(clsattachment); madapter.notifydatasetchanged(); } private void uploadfile(string path) { toast.maketext(mcontext, "在此处调用接口!", toast.length_short).show(); } }
布局文件代码
<?xml version="1.0" encoding="utf-8"?> <scrollview xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@color/ghostwhite" android:layout_height="match_parent"> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <include layout="@layout/title_bar" /> <imageview android:id="@+id/section_new_logo" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:scaletype="centercrop" android:background="@color/white" android:src="@drawable/logo" /> <include layout="@layout/layout_item_divider_horizontal" /> <edittext android:id="@+id/section_new_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:background="@null" android:hint="请输入名称" android:inputtype="text" android:textcolor="@color/black" /> <include layout="@layout/layout_item_divider_horizontal" /> <edittext android:id="@+id/section_new_desc" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:background="@null" android:gravity="top|start" android:hint="请输入内容" android:inputtype="textmultiline" android:minheight="100dp" android:textcolor="@color/black" /> <include layout="@layout/layout_item_divider_horizontal" /> <linearlayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:orientation="horizontal"> <textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="选择版主:" android:textcolor="@color/black" android:textsize="18sp" /> <textview android:id="@+id/section_new_manager" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:drawableend="@drawable/ic_arrow_drop_down_black_24dp" android:text="default user" android:textcolor="@color/black" android:textsize="18sp" /> </linearlayout> <include layout="@layout/layout_item_divider_horizontal" /> <linearlayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:background="@color/white" android:orientation="horizontal"> <textview android:layout_width="200dp" android:layout_height="wrap_content" android:layout_marginstart="20dp" android:gravity="center_vertical" android:minheight="30dp" android:text="文件名:" android:textcolor="@color/black" /> <textview android:layout_width="100dp" android:layout_height="30dp" android:gravity="center_vertical" android:text="文件大小:" android:textcolor="@color/black" /> <textview android:layout_width="wrap_content" android:layout_height="30dp" android:gravity="center_vertical" android:text="操作:" android:textcolor="@color/black" /> </linearlayout> <listview android:id="@+id/lv_attach" android:layout_width="match_parent" android:layout_height="160dp" android:divider="@null" /> <include layout="@layout/layout_item_divider_horizontal" /> <textview android:id="@+id/tv_upload_attach" style="@style/widget.appcompat.button" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_gravity="end" android:text="添加附件" android:textcolor="@color/black" android:textsize="16sp" /> </linearlayout> </scrollview>
适配器代码
public class attachmentlistadapter extends baseadapter { private list<clsattachment> mlist; private layoutinflater minflater; private callback mcallback; //自定义回调接口,用于传值 public interface callback { void onclick(view view, int position); } public attachmentlistadapter(list<clsattachment> attachments, context mcontext) { this.mlist = attachments; minflater = layoutinflater.from(mcontext); } public void setmcallback(callback mcallback) { this.mcallback = mcallback; } @override public int getcount() { return mlist.size(); } @override public clsattachment getitem(int position) { return mlist.get(position); } @override public long getitemid(int position) { return position; } @override public view getview(int position, view convertview, viewgroup parent) { clsattachment clsattachment = mlist.get(position); viewholder holder; if (convertview == null) { holder = new viewholder(); convertview = minflater.inflate(r.layout.item_attchment_list, null); holder.delete = convertview.findviewbyid(r.id.attachment_delete); holder.name = convertview.findviewbyid(r.id.attachment_name); holder.size = convertview.findviewbyid(r.id.attachment_size); convertview.settag(holder); } else { holder = (viewholder) convertview.gettag(); } holder.name.settext(clsattachment.getfilename()); long length = long.parselong(clsattachment.getsize()); holder.size.settext(length / 1024 + "kb"); //将position放在tag里面 holder.delete.settag(position); holder.delete.setonclicklistener(v -> { //触发点击事件的时候将position回传 mcallback.onclick(v, (integer) v.gettag()); }); return convertview; } private class viewholder { textview name; textview size; textview delete; } }
效果如图:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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