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xUtils3.0框架学习笔记分享

程序员文章站 2024-03-01 08:39:58
xutils是开速开发安卓项目的开源框架,开源项目地址:https://github.com/wyouflf/xutils3。使用起来非常方便。主要功能包括: 1、xut...

xutils是开速开发安卓项目的开源框架,开源项目地址:https://github.com/wyouflf/xutils3。使用起来非常方便。主要功能包括:

1、xutils 支持超大文件(超过2g)上传,更全面的http请求协议支持(11种谓词)。

2、拥有更加灵活的orm,更多的事件注解支持且不受混淆影响。

3、图片绑定支持gif(受系统兼容性影响, 部分gif文件只能静态显示), webp; 支持圆角, 圆形, 方形等裁剪, 支持自动旋转等。

4、数据库api简化提高性能, 达到和greendao一致的性能。

5、http实现替换httpclient为urlconnection, 自动解析回调泛型, 更安全的断点续传策略等。 

控件及事件注解绑定,方便高效http请求,简单地数据库操作方式,确实是一款非常有助于我们快速开发项目的开源框架。 
参考github上面demo及相关资料,写了一个学习的demo,分别从注解,图片,http及数据库四个方面进行了代码编写。

首先是在androidstudio中配置项目:
第一步:
在androidstudio项目的build.gradle文件中添加compile ‘org.xutils:xutils:3.3.36':

dependencies {
 compile filetree(dir: 'libs', include: ['*.jar'])
 testcompile 'junit:junit:4.12'
 compile 'com.android.support:appcompat-v7:23.4.0'
 compile 'org.xutils:xutils:3.3.36'
}

添加好后build下工程即可。

第二步:
在androidmanifest.xml中添加对应权限:

<uses-permission android:name="android.permission.internet" />
<uses-permission android:name="android.permission.write_external_storage" />

第三步:在项目中自定义application,初始化xutils3.0。

/**
 * description:
 * 作者:ldm
 * 时间:20162016/6/22 09:03
 * 邮箱:1786911211@qq.com
 */
public class baseapplication extends application {
 @override
 public void oncreate() {
 super.oncreate();
 x.ext.init(this);//在自定义的application中初始化xutils3.0
 }
}

记得把我们定义的application配置到androidmanifest.xml中。
接下来就可以作用xutils3.0进行快速开发了。

—– 第一部分:注解示例—–

/**
 * description:xutils3.0框架注解功能
 * 作者:ldm
 * 时间:20162016/6/22 09:17
 * 邮箱:1786911211@qq.com
 */
@contentview(r.layout.activity_annotation)
public class annotationactivity extends activity {

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 x.view().inject(this);
 fragmentmanager fragmentmanager = getfragmentmanager();
 fragmenttransaction fragmenttransaction = fragmentmanager.begintransaction();
 testfragment fragment = new testfragment();
 fragmenttransaction.add(r.id.fra_layout, fragment);
 fragmenttransaction.commit();
 }
}

—–注解功能对应地fragment—–

/**
 * description:xutils3.0框架注解之:fragment中注解使用
 * 作者:ldm
 * 时间:20162016/6/22 09:28
 * 邮箱:1786911211@qq.com
 */
@contentview(r.layout.frag_test)//给fragment绑定布局文件
public class testfragment extends fragment {
 @viewinject(r.id.test_listview)
 private listview listview;
 private list<listbean> datas;

 public testfragment() {
 super();
 }

 @nullable
 @override
 public view oncreateview(layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {
 return x.view().inject(this, inflater, container);//调用x.view().inject()方法返回view
 }

 //oncreateview是创建的时候调用,onviewcreated是在oncreateview后被触发的事件
 @override
 public void onviewcreated(view view, @nullable bundle savedinstancestate) {
 super.onviewcreated(view, savedinstancestate);
 constructdatas();
 listview.setadapter(new testadapter(getactivity(), datas));
 }

 private void constructdatas() {
 datas = new arraylist<>();
 for (int i = 0; i < 15; i++) {
 listbean bean = new listbean("这是第" + i + "个标题", "这里都是相同的内容");
 datas.add(bean);
 }
 }

 //listview的item点击事件注解操作
 @event(type = adapterview.onitemclicklistener.class, value = r.id.test_listview)
 private void onitemclick(adapterview<?> parent, view view, int position, long id) {
 toast.maketext(getactivity(), "点击了第" + position + "个item", toast.length_long).show();
 }

 //长按事件注解操作
 @event(type = adapterview.onitemlongclicklistener.class, value = r.id.test_listview)
 private boolean onlongitemclick(adapterview<?> parent, view view, int position, long id) {
 toast.maketext(getactivity(), "长按第" + position + "个item", toast.length_long).show();
 return true;
 }
}

—–第二部分:图片加载示例—–

/**
 * description:xutils3.0框架图片功能
 * 作者:ldm
 * 时间:20162016/6/22 09:17
 * 邮箱:1786911211@qq.com
 */
@contentview(r.layout.activity_image)
public class imageactivity extends activity {
 @viewinject(r.id.image_01)
 private imageview image_01;
 @viewinject(r.id.image_02)
 private imageview image_02;
 @viewinject(r.id.image_03)
 private imageview image_03;
 @viewinject(r.id.image_04)
 private imageview image_04;
 private string url_01 = "";
 private string url_02 = "";
 private string url_03 = "";

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 x.view().inject(this);//需要添加这句代码,否则不会关联到布局
 }

 //加载网络图片第一种方法
 @event(value = r.id.image_01)
 private void loadimagemethodone(view v) {
 //直接调用 bind(imageview view, string url)方法,传入对应控件及url即可
 x.image().bind(image_01, url_01);
 }

 //加载网络图片第二种方法
 @event(value = r.id.image_02)
 private void loadimagemethodtwo(view v) {
 //创建图片参数设置类imageoptions
 imageoptions options = new imageoptions.builder().build();
 //直接调用bind(imageview view, string url, imageoptions options)方法,传入对应参数
 x.image().bind(image_02, url_02, options);
 }

 //加载网络图片第三种方法
 @event(value = r.id.image_03)
 private void loadimagemethodthree(view v) {
 //调用bind(imageview view, string url, callback.commoncallback<drawable> callback)
 x.image().bind(image_03, url_03, new callback.cachecallback<drawable>() {
 @override
 public boolean oncache(drawable result) {//可以在这里设置图片保存等操作
 return false;
 }

 @override
 public void onsuccess(drawable result) {//获取成功

 }

 @override
 public void onerror(throwable ex, boolean isoncallback) {//获取失败

 }

 @override
 public void oncancelled(cancelledexception cex) {//取消操作

 }

 @override
 public void onfinished() {//完成操作

 }
 });
 }

 //加载本地图片
 @event(value = r.id.image_04)
 private void loadimagemethodfour(view v) {
 imageoptions options = new imageoptions.builder().
 setimagescaletype(imageview.scaletype.fit_center).
 setusememcache(true).
 build();//可以设置options各项参数
 // assets下的图片
 // x.image().bind(image_04, "assets://test.png", options);
 // sd卡下图片
 // x.image().bind(image_04, new file("/sdcard/test.png").touri().tostring(), options);
 x.image().bind(image_04, "/sdcard/test.gif", options);
 }
}

—–第三部分:http请求—–

/**
 * description:xutils框架之http请求
 * 作者:ldm
 * 时间:20162016/6/22 09:17
 * 邮箱:1786911211@qq.com
 */
@contentview(r.layout.activity_http)
public class httpactivity extends activity {
 @viewinject(r.id.get)
 private button get;
 @viewinject(r.id.post)
 private button post;
 @viewinject(r.id.upload)
 private button upload;
 @viewinject(r.id.download)
 private button download;
 private static final string tag = "httpactivity";

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 x.view().inject(this);
 }

 //http请求之get请求
 @event(type = view.onclicklistener.class, value = r.id.get)
 private void httpgetonclick(view v) {
 string url = "http://www.baidu.com";
 final progressdialog dia = new progressdialog(this);
 dia.setmessage("加载中....");
 dia.show();
 requestparams params = new requestparams(url);
 x.http().get(params, new callback.commoncallback<string>() {
 @override
 public void onsuccess(string result) {
 //加载成功回调,返回获取到的数据
 log.i(tag, "onsuccess: " + result);
 }

 @override
 public void onfinished() {
 dia.dismiss();//加载完成
 }

 @override
 public void oncancelled(cancelledexception cex) {

 }

 @override
 public void onerror(throwable ex, boolean isoncallback) {

 }
 });
 }

 //http请求之post请求
 @event(type = view.onclicklistener.class, value = r.id.post)
 private void httppostonclick(view v) {
 string url = "this is request url for post";
 final progressdialog dia = new progressdialog(this);
 dia.setmessage("加载中....");
 dia.show();
 requestparams params = new requestparams(url);
 params.addparameter("username", "admin");//添加post请求参数,如果是get请求,会直接添加到url后面
 params.addbodyparameter("password", "123456");
 params.addheader("head", "给head添加信息");//addheader添加head信息
 x.http().post(params, new callback.commoncallback<string>() {
 @override
 public void onsuccess(string result) {
 //加载成功回调,返回获取到的数据
 log.i(tag, "onsuccess: " + result);
 }

 @override
 public void onfinished() {
 dia.dismiss();//加载完成
 }

 @override
 public void oncancelled(cancelledexception cex) {

 }

 @override
 public void onerror(throwable ex, boolean isoncallback) {

 }
 });
 }

 //http请求之文件上传
 @event(type = view.onclicklistener.class, value = r.id.upload)
 private void uploadonclick(view v) {
 string upurl = "/mnt/sdcard/pic/test.jpg";//指定要上传的文件
 final progressdialog dia = new progressdialog(this);
 dia.setmessage("加载中....");
 dia.show();
 requestparams params = new requestparams(upurl);
 params.addbodyparameter("file", new file(upurl));
 x.http().post(params, new callback.commoncallback<string>() {
 @override
 public void onsuccess(string result) {
 //加载成功回调,返回获取到的数据
 log.i(tag, "onsuccess: " + result);
 }

 @override
 public void onfinished() {
 dia.dismiss();//加载完成
 }

 @override
 public void oncancelled(cancelledexception cex) {

 }

 @override
 public void onerror(throwable ex, boolean isoncallback) {

 }
 });
 }

 //http请求之文件下载
 @event(type = view.onclicklistener.class, value = r.id.download)
 private void downloadonclick(view v) {
 string downurl = "please input download url";
 final progressdialog dia = new progressdialog(this);
 dia.setmessage("加载中....");
 dia.show();
 requestparams params = new requestparams(downurl);
 x.http().post(params, new callback.commoncallback<file>() {
 @override
 public void onsuccess(file result) {
 //下载成功
 intent in = new intent(intent.action_view);
 in.setdataandtype(uri.fromfile(result), "application/vnd.android.package-archive");//比如我们下载的apk文件,直接安装
 startactivity(in);
 }

 @override
 public void onfinished() {
 dia.dismiss();
 }

 @override
 public void oncancelled(cancelledexception cex) {

 }

 @override
 public void onerror(throwable ex, boolean isoncallback) {

 }
 });
 }
}

—-第四部分:数据库操作——

/**
 * description:xutils3.0框架数据库操作
 * 作者:ldm
 * 时间:20162016/6/22 09:17
 * 邮箱:1786911211@qq.com
 */

@contentview(r.layout.activity_db)
public class databaseactivity extends activity {
 @viewinject(r.id.create)
 private button create;
 @viewinject(r.id.add)
 private button add;
 @viewinject(r.id.delete)
 private button delete;
 @viewinject(r.id.query)
 private button query;
 @viewinject(r.id.update)
 private button update;
 @viewinject(r.id.del_db)
 private button del_db;
 private dbmanager.daoconfig daoconfig;

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 x.view().inject(this);
 }

 private void initdatabase() {
 daoconfig = new dbmanager.daoconfig()
 .setdbname("test.db")//数据库名称
 // 不设置dbdir时, 默认存储在app的私有目录.
 .setdbdir(new file("/sdcard")) // "sdcard"的写法并非最佳实践, 这里为了简单, 先这样写了.
 .setdbversion(2)//设置版本号
 .setdbopenlistener(new dbmanager.dbopenlistener() {
  @override
  public void ondbopened(dbmanager db) {
  // 开启wal, 对写入加速提升巨大
  db.getdatabase().enablewriteaheadlogging();
  }
 })
 .setdbupgradelistener(new dbmanager.dbupgradelistener() {//数据库升级
  @override
  public void onupgrade(dbmanager db, int oldversion, int newversion) {
  // todo: ...
  // db.addcolumn(...);
  // db.droptable(...);
  // ...
  // or
  // db.dropdb();
  }
 });
 }

 //创建数据库及表格
 @event(value = r.id.create)
 private void createonclick(view v) throws exception {
 initdatabase();
 dbmanager db = x.getdb(daoconfig);
 teacher t = new teacher("张三", 28, "english", 1);
 db.save(t);//调用这句话,则可以创建表格,并把数据存入
 }

 //添加数据
 @event(value = r.id.add)
 private void addonclick(view v) throws exception {
 dbmanager db = x.getdb(daoconfig);
 teacher t = new teacher("李四", 38, "math", 3);
 db.save(t);//如果表格存在,并把数据存入
 list<teacher> list = new arraylist<>();
 list.add(new teacher("王五", 30, "engilsh", 2));
 list.add(new teacher("赵六", 40, "chinese", 3));
 list.add(new teacher("陈七", 50, "math", 4));
 db.save(list);//可以这样保存多条数据到指定表格
 }

 //删除数据
 @event(value = r.id.delete)
 private void deleteonclick(view v) throws exception {
 dbmanager db = x.getdb(daoconfig);
 wherebuilder wb = wherebuilder.b();
 wb.and("level", "=", 1);
 db.delete(teacher.class, wb);//删除等级为1的教师
 }

 //修改数据
 @event(value = r.id.update)
 private void updateonclick(view v) throws exception {
 dbmanager db = x.getdb(daoconfig);
 db.update(teacher.class, wherebuilder.b().and("name", "=", "王五"), new keyvalue("name", "朱八"));//把王五的名字改成朱八
 }

 //查询数据
 @event(value = r.id.query)
 private void queryonclick(view v) throws exception {
 dbmanager db = x.getdb(daoconfig);
 wherebuilder wb = wherebuilder.b();
 wb.and("level", "=", 2);
 list<teacher> list = db.selector(teacher.class).findall();//查询所有数据
 list<teacher> list1 = db.selector(teacher.class).where(wb).findall();//查询等级数2的教师
 }

 //删除数据库或表格
 @event(value = r.id.del_db)
 private void deldbonclick(view v) throws exception {
 dbmanager db = x.getdb(daoconfig);
 db.dropdb();//删除数据库
 db.droptable(teacher.class);//删除teacher表格
 }


}

由于时间关系,代码写得比较粗糙,后期使用中再细化。

demo下载地址:http://xiazai.jb51.net/201611/yuanma/xutilsdemo(jb51.net).rar

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。