本文实例讲述了android编程实现泡泡聊天界面的方法。分享给大家供大家参考，具体如下：
昨天写了个界面，实现了android泡泡聊天界面。运行结果如下，点击发送按钮，屏幕就显示text的内容。
我也是在网上的一份源码的基础上更改的，整个泡泡界面的实现要点：
（1）主界面其实就是一个list view
（2）文字显示界面其实就使用了android:background="@drawable/incoming"这个东西。背景图片的格式是xxx.9.png，专门用来缩放的，不然显示效果非常差。
（3）自定义了一个adapter,当然是继承android.widget.baseadapter，重写了getview的方法。
整个工程分布如下：
主activity: chatactivity如下：
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package com.tencent; import android.app.activity; import android.os.bundle; import android.util.log; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.widget.edittext; import android.widget.listview; import java.util.arraylist; import java.util.calendar; public class chatactivity extends activity { private static final string tag = chatactivity.class.getsimplename();; private listview talkview; private button messagebutton; private edittext messagetext; // private chatmsgviewadapter myadapter; private arraylist<chatmsgentity> list = new arraylist<chatmsgentity>(); public void oncreate(bundle savedinstancestate) { log.v(tag, "oncreate >>>>>>"); super.oncreate(savedinstancestate); setcontentview(r.layout.main); talkview = (listview) findviewbyid(r.id.list); messagebutton = (button) findviewbyid(r.id.messagebutton); messagetext = (edittext) findviewbyid(r.id.messagetext); onclicklistener messagebuttonlistener = new onclicklistener() { @override public void onclick(view arg0) { // todo auto-generated method stub log.v(tag, "onclick >>>>>>>>"); string name = getname(); string date = getdate(); string msgtext = gettext(); int rid = r.layout.list_say_he_item; chatmsgentity newmessage = new chatmsgentity(name, date, msgtext, rid); list.add(newmessage); // list.add(d0); talkview.setadapter(new chatmsgviewadapter(chatactivity.this, list)); messagetext.settext(""); // myadapter.notifydatasetchanged(); } }; messagebutton.setonclicklistener(messagebuttonlistener); } // shuold be redefine in the future private string getname() { return getresources().getstring(r.string.mydisplayname); } // shuold be redefine in the future private string getdate() { calendar c = calendar.getinstance(); string date = string.valueof(c.get(calendar.year)) + "-" + string.valueof(c.get(calendar.month)) + "-" + c.get(c.get(calendar.day_of_month)); return date; } // shuold be redefine in the future private string gettext() { return messagetext.gettext().tostring(); } public void ondestroy() { log.v(tag, "ondestroy>>>>>>"); // list = null; super.ondestroy(); } } |
显示消息体的定义
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package com.tencent; public class chatmsgentity { private static final string tag = chatmsgentity.class.getsimplename(); private string name; private string date; private string text; private int layoutid; public string getname() { return name; } public void setname(string name) { this.name = name; } public string getdate() { return date; } public void setdate(string date) { this.date = date; } public string gettext() { return text; } public void settext(string text) { this.text = text; } public int getlayoutid() { return layoutid; } public void setlayoutid(int layoutid) { this.layoutid = layoutid; } public chatmsgentity() { } public chatmsgentity(string name, string date, string text, int layoutid) { super(); this.name = name; this.date = date; this.text = text; this.layoutid = layoutid; } } |
chatmsgviewadapter定义如下：
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package com.tencent; import android.content.context; import android.database.datasetobserver; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.linearlayout; import android.widget.textview; import java.util.arraylist; public class chatmsgviewadapter extends baseadapter { private static final string tag = chatmsgviewadapter.class.getsimplename(); private arraylist<chatmsgentity> coll; private context ctx; public chatmsgviewadapter(context context, arraylist<chatmsgentity> coll) { ctx = context; this.coll = coll; } public boolean areallitemsenabled() { return false; } public boolean isenabled(int arg0) { return false; } public int getcount() { return coll.size(); } public object getitem(int position) { return coll.get(position); } public long getitemid(int position) { return position; } public int getitemviewtype(int position) { return position; } public view getview(int position, view convertview, viewgroup parent) { log.v(tag, "getview>>>>>>>"); chatmsgentity entity = coll.get(position); int itemlayout = entity.getlayoutid(); linearlayout layout = new linearlayout(ctx); layoutinflater vi = (layoutinflater) ctx.getsystemservice(context.layout_inflater_service); vi.inflate(itemlayout, layout, true); textview tvname = (textview) layout.findviewbyid(r.id.messagedetail_row_name); tvname.settext(entity.getname()); textview tvdate = (textview) layout.findviewbyid(r.id.messagedetail_row_date); tvdate.settext(entity.getdate()); textview tvtext = (textview) layout.findviewbyid(r.id.messagedetail_row_text); tvtext.settext(entity.gettext()); return layout; } public int getviewtypecount() { return coll.size(); } public boolean hasstableids() { return false; } public boolean isempty() { return false; } public void registerdatasetobserver(datasetobserver observer) { } public void unregisterdatasetobserver(datasetobserver observer) { } } |
布局文件看得我比较痛苦，这个布局文件不好搞啊，呵呵
完整实例代码代码点击此处本站下载。
希望本文所述对大家android程序设计有所帮助。
