[置顶] xUtils3.0框架学习笔记
2016-06-22
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：
- 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)。
- 拥有更加灵活的ORM，更多的事件注解支持且不受混淆影响。
- 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。
- 数据库api简化提高性能, 达到和greenDao一致的性能。
- 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://download.csdn.net/detail/true100/9556471