</pre> 学习Android到现在估计应该还不到一个月的时间，我很激动能够在自己的努力还有奋斗下开发一个自己想要的App,虽然这个App的功能还不够完善，界面很丑陋，Bug很存在很多，但是我觉得这个起码是我自己动用智慧开发的第一个App,所以我要在这里将我开发的思路还有一个想法写在这里。<span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span><p></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>以实现功能：</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>即时通讯：不能好友之间可以即时通讯。但是同时只能和一个人通讯。</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>注 册：注册功能实现，但是数据保存的是客户端，即是在Android本地的数据库，并没有将用户保存到服</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>服务器。</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>登 录：登录会自动和本地数据库中进行校对,基本的登录思想。</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>添加好友：当前数据库中存在好友时，可以实现添加到好友列表。Bug：Sqlite的用法还是不够熟练，</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>当存在该好友的情况下还是可以继续添加该还有</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap">用到的知识：</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"><span style="white-space:pre"></span>基本的Android界面布局，Sqlite，Servlet（服务器端），JavaBean思想，sHttp协议，Android中的</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"> Http操作，ListView，自定义ArrayAdapter,Android中Activity的生命周期，Activity中的定时操</span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap">作，异步处理，子线程处理。</span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap">功能详解：</span><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:16.2px; white-space:pre-wrap"></span></p><p><span class="token pre" style="font-size:0.9em; color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"></span><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:18px">Login（登录界面）：</span></span></p><p><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:18px"><img src="http://img.blog.csdn.net/20160527124853791?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /></span></span></p><p><span class="token p" style="color:rgb(90,90,90); font-family:'microsoft yahei'; font-size:18px; line-height:29.7px; white-space:pre-wrap; outline:none!important">作为App的主页面，虽然丑陋了一点，但是它起到的作用也就是仅仅登录作用，当点击登录之后，会自动</span><span class="token p" style="color:rgb(90,90,90); font-family:'microsoft yahei'; font-size:18px; line-height:29.7px; white-space:pre-wrap; outline:none!important">和<span style="white-space:pre"></span>本地数据库中做校验，存在即登录，失败即提示无法登陆；</span><span class="token lf" style="color:rgb(90,90,90); font-family:'microsoft yahei'; font-size:18px; line-height:29.7px; white-space:pre-wrap; outline:none!important"></span><span class="token p" style="color:rgb(90,90,90); font-family:'microsoft yahei'; font-size:18px; line-height:29.7px; white-space:pre-wrap; outline:none!important"></span><span class="token pre" style="font-size:0.9em; color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"></span></p><p><span class="token pre" style="font-size:0.9em; color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><img src="http://img.blog.csdn.net/20160527125415498?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /></span></p><p><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:0.9em; white-space:pre"></span><span style="font-size:18px">Regist（注册页面）：<span class="token lf" style="outline:none!important"></span></span></span></p><p><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:18px"><span style="white-space:pre"></span>和登录息息相关的部分，登录即少不了注册</span></span></p><p><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:18px"></span></span></p><p><span class="token pre" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap; outline:none!important"><span style="font-size:18px">。<img src="http://img.blog.csdn.net/20160527125541014" alt="" /><span class="token lf" style="outline:none!important"></span></span></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap"><span style="font-size:18px">注册提供最基本的用户名和密码，但是在数据库中会自动生成一个UUID当做该用户的主键</span></span></p><p><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; white-space:pre-wrap"><span style="font-size:18px"><span stString uuid = UUID.randomUUID().toString().replace("-", "").toUpperCase();好友列表：进入这个页面时，会自动从本地的数据库中查找好友。查找思想：<span style="white-space:pre"> </span>根据从Login页面获得到的User在本地数据库中进行查找。<span style="white-space:pre"> </span>如果找到那么就返回一个SingleFriend的Bean类。</span></span></p><p><span class="token lf" style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:0.9em; white-space:pre-wrap; outline:none!important"></span><span style="color:rgb(52,52,52); font-family:'Source Code Pro',monospace; font-size:0.9em; white-space:pre-wrap"></span></p><pre name="code" class="java" style="color: rgb(52, 52, 52); font-size: 16.2px;"><span style="font-size: 16.2px;"><span style="white-space: pre;"> </span>public singleFriend seachFriendforFriendList(String userName){ </span>
List<Friend> list = new ArrayList<Friend>();
String username;
boolean falg=false;
Cursor cursor=db.query("Friend", null, "user=?", new String[]{userName}, null, null, null);
if (cursor.moveToFirst()) {
falg=true;
username=cursor.getString(cursor.getColumnIndex("user"));
do{
Friend friend = new Friend();
friend.setFriendName(cursor.getString(cursor.getColumnIndex("friend")));
friend.setMsg_path(cursor.getInt(cursor.getColumnIndex("img")));
list.add(friend);
}
while(cursor.moveToNext());
SingleFriend.setUserName(username);
SingleFriend.setFriends(list);
return SingleFriend;
}
else if(!cursor.moveToFirst()) {
falg=false;
SingleFriend=null;
return SingleFriend;
}
return SingleFriend;
}
这个方法就是从本地数据库查找好友的方法。
其中在这个页面，需要自己重写一个FriendAdapter方法，
继承自ArrayAdapter<E>显示ListView中的具体类容。
其中ListView中的具体类容就和重写的这个方法的布局（Layout）还有<E>中的具体内容有关
添加好友页面：
会从数据库中查找你输入用户名，找到即返回，找不到就提示不存在。聊天界面：
基本的及时通讯，已知Bug：
代码中处理的原因，不能收到第一条消息。并且必须两个人同时打开对方的对话框才会收到消息
同时我也实现了将好友的聊天记录保存到本地数据库。就不在这里即时即时通讯了
处理思想，通过自己写的服务器端（servlet）通过访问该Servlet并带入不同的值实现消息的保存，然后再页面一直请求
服务器端一直请求属于自己的那一个消息。显示到界面中。
好了基本的功能以及演示完毕了，我这个博客写的也是比较简单，但是我会不断充实我自己的。好困，睡觉去了。
说一下自己下阶段的打算：Android中的活动很重要，准备探索一下Activity生命周期；
学习Android的Touch事件的监听；
学习基本的android动画。
时间： 2024-08-03 19:05:19