Android实现登录邮箱的自动补全功能
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2024-02-29 12:27:40
本文实例为大家分享了android登录邮箱自动补全功能的实现方法,供大家参考,具体内容如下
效果:
实现原理:
1、继承重写简单控件autocompletetex...
本文实例为大家分享了android登录邮箱自动补全功能的实现方法,供大家参考,具体内容如下
效果:
实现原理:
1、继承重写简单控件autocompletetextview
2、编写自定义数据适配器和布局文件,并实现文字变化监听器
3、通过组合方式,实现右侧的删除图标。并根据焦点和文字的变化,动态显示右侧删除图标。
1、通过继承自简单控件autocompletetextview实现帐号自动补全
关键代码:
public class autocomplete extends autocompletetextview { private static final string[] emailsuffix = { "@qq.com", "@163.com", "@126.com", "@gmail.com", "@sina.com", "@hotmail.com", "@yahoo.cn", "@sohu.com", "@foxmail.com", "@139.com", "@yeah.net", "@vip.qq.com", "@vip.sina.com"}; ......省略号...... //构造函数原型要正确,留给系统调用 public autocomplete(context context) { super(context); mcontext = context; } public autocomplete(context context, attributeset attrs) { super(context, attrs); mcontext = context; } public void init(imageview imageview) { mimageview = imageview; final myadatper adapter = new myadatper(mcontext); setadapter(adapter); addtextchangedlistener(new textwatcher() { @override public void aftertextchanged(editable s) { if (istextwatch) { string input = s.tostring(); ......省略号...... adapter.clearlist(); //注意要清空数据,根据输入的变化,自动生成数据 if (input.length() > 0) { for (int i = 0; i < emailsuffix.length; ++i) { adapter.addlistdata(input + emailsuffix[i]); } } adapter.notifydatasetchanged(); showdropdown();//该行代码会造成崩溃 } } }); //当输入一个字符的时候就开始检测 setthreshold(1); } private class viewholder { textview tv_text; } class myadatper extends baseadapter implements filterable { private list<string> mlist; private context mcontext; private myfilter mfilter; ......省略号...... public void clearlist() { mlist.clear(); } public void addlistdata(string strdata) { mlist.add(strdata); } @override public view getview(int position, view convertview, viewgroup parent) { view view; viewholder viewholder; if (convertview == null) { view = layoutinflater.from(mcontext).inflate(r.layout.activity_autocomplete_item, null); viewholder = new viewholder(); viewholder.tv_text = (textview) view.findviewbyid(r.id.tv_autocomplete); view.settag(viewholder); } else { view = convertview; viewholder = (viewholder) view.gettag(); } viewholder.tv_text.settext(mlist.get(position)); return view; } ......省略号...... }
activity_autocomplete_item 下拉列表布局文件
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:background="@color/white" android:layout_height="wrap_content"> <textview android:id="@+id/tv_autocomplete" android:padding="15dp" android:textsize="20sp" android:singleline="true" android:textcolor="@color/black" android:layout_width="match_parent" android:layout_height="wrap_content" /> </linearlayout>
上面自动补全的效果图:
2、通过组合方式实现帐号自动补全复杂控件
关键代码:
public class advancedautocompletetextview extends relativelayout { private context mcontext; private autocomplete mautocomplete; //上面的自定义控件 private imageview mimageview; //右侧的图标控件 ......省略号...... @override protected void onfinishinflate() { super.onfinishinflate(); initviews(); } //代码方式,初始化布局 private void initviews() { relativelayout.layoutparams params = new relativelayout.layoutparams(relativelayout.layoutparams.fill_parent, layoutparams.fill_parent); params.addrule(relativelayout.align_parent_left); params.addrule(relativelayout.center_vertical); mautocomplete = new autocomplete(mcontext); mautocomplete.setlayoutparams(params); mautocomplete.setpadding(0, 0, 40, 0); mautocomplete.setsingleline(true); mautocomplete.setinputtype(inputtype.type_text_variation_email_address); mautocomplete.setfitssystemwindows(true); mautocomplete.setems(10); mautocomplete.sethint("urs账号"); mautocomplete.setimeoptions(editorinfo.ime_action_next | editorinfo.ime_flag_no_extract_ui | editorinfo.ime_flag_no_fullscreen); mautocomplete.setdropdownhorizontaloffset(0); mautocomplete.setdropdownverticaloffset(2); mautocomplete.setbackgroundresource(r.drawable.edit_text_background); relativelayout.layoutparams p = new relativelayout.layoutparams(relativelayout.layoutparams.wrap_content, layoutparams.fill_parent); p.addrule(relativelayout.align_parent_right); p.addrule(relativelayout.center_vertical); p.rightmargin = 10; mimageview = new imageview(mcontext); mimageview.setlayoutparams(p); mimageview.setscaletype(imageview.scaletype.fit_center); mimageview.setimageresource(r.drawable.unselect); mimageview.setclickable(true); mimageview.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { settext(""); } }); this.addview(mautocomplete); this.addview(mimageview); //监听获取焦点事件,目的:输入帐号时,右侧图标的显示 mautocomplete.setonfocuschangelistener(new onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus && !mautocomplete.gettext().tostring().isempty()) { mautocomplete.setshow(false); //如果获取首次获取焦点,此时文本不为空,则显示,并禁止文本改变监听里的设置 mimageview.setimageresource(r.drawable.item_delete); } else if (hasfocus) { mautocomplete.setshow(true);//如果获取首次获取焦点,此时文本为空,则不改变,并开启文本改变监听里的设置 } else { mautocomplete.setshow(false); mimageview.setimageresource(r.drawable.unselect); } } }); //对autocomplete自定义控件初始化,一定要放到最后.否则,会由于autocomplete初始化未完成,就弹窗,而崩溃 mautocomplete.init(mimageview); } }
以上就是本文的全部内容,希望对大家的学习有所帮助。