Android编程实现泡泡聊天界面实例详解(附源码)

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：

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

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：

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。