DbUtils使用方法：

activity_main.xml

MainActivity.java

package com.xiaofei.app.xutils; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Toast; import com.lidroid.xutils.DbUtils; import com.lidroid.xutils.db.sqlite.Selector; import com.lidroid.xutils.db.sqlite.WhereBuilder; import com.lidroid.xutils.exception.DbException; import java.util.List; public class MainActivity extends AppCompatActivity {
       DbUtils db;     @Override     protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);      db = DbUtils.create(this,"mydb");     }     public void saveClick(View view)     {
           User user=new User("xiaofei@qq.com","xiaofei");         try {
               db.save(user);             Toast.makeText(MainActivity.this,"save success",Toast.LENGTH_LONG).show();         } catch (DbException e) {
               e.printStackTrace();         }     }     public void findAllClick(View view)     {
           try {
               List
    
      list=db.findAll(User.class);             for (User u:list)             {
                   System.out.println(u);             }         } catch (DbException e) {
               e.printStackTrace();         }     }     public void selectByClick(View view)     {
           try {
               User user = db.findFirst(Selector.from(User.class).where("name","=","xiaofei"));         Toast.makeText(this,user.toString(),Toast.LENGTH_LONG).show();         } catch (DbException e) {
               e.printStackTrace();         }     }   public void updateClick(View view)   {
         User user=new User();       user.setId(1);       user.setEmail("512908113@qq.com");       user.setName("xiaoxiaofei");       try {
             db.update(user,"email","name");           Toast.makeText(this,"更新成功",Toast.LENGTH_LONG).show();       } catch (DbException e) {
             e.printStackTrace();       }   }     public void deleteClick(View view)     {
           try {
               db.delete(User.class, WhereBuilder.b("id","=","1"));             Toast.makeText(this,"删除成功",Toast.LENGTH_LONG).show();         } catch (DbException e) {
               e.printStackTrace();         }     } }
    

User.java

package com.xiaofei.app.xutils; /**  * Created by Goddess on 2016/4/25.  */ public class User {
       private int id;     private String name;     private String email;     public int getId() {
           return id;     }     public void setId(int id) {
           this.id = id;     }     public User(String email, String name) {
           this.email = email;         this.name = name;     }     public String getEmail() {
           return email;     }     public void setEmail(String email) {
           this.email = email;     }     public String getName() {
           return name;     }     public void setName(String name) {
           this.name = name;     }     public User() {
       }     @Override     public String toString() {
           return "User{" +                 "email='" + email + '\'' +                 ", id=" + id +                 ", name='" + name + '\'' +                 '}';     } }

ViewUtils使用方法

• 完全注解方式就可以进行UI绑定和事件绑定。
• 无需findViewById和setClickListener等。

// xUtils的view注解要求必须提供id，以使代码混淆不受影响。@ViewInject(R.id.textView)TextView textView;//@ViewInject(vale=R.id.textView, parentId=R.id.parentView)//TextView textView;@ResInject(id = R.string.label, type = ResType.String)private String label;// 取消了之前使用方法名绑定事件的方式，使用id绑定不受混淆影响// 支持绑定多个id @OnClick({R.id.id1, R.id.id2, R.id.id3})// or @OnClick(value={R.id.id1, R.id.id2, R.id.id3}, parentId={R.id.pid1, R.id.pid2, R.id.pid3})// 更多事件支持参见ViewCommonEventListener类和包com.lidroid.xutils.view.annotation.event。@OnClick(R.id.test_button)public void testButtonClick(View v) { // 方法签名必须和接口中的要求一致    ...}...//在Activity中注入：@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    ViewUtils.inject(this); //注入view和事件    ...    textView.setText("some text...");    ...}//在Fragment中注入：@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    View view = inflater.inflate(R.layout.bitmap_fragment, container, false); // 加载fragment布局    ViewUtils.inject(this, view); //注入view和事件    ...}//在PreferenceFragment中注入：public void onActivityCreated(Bundle savedInstanceState) {    super.onActivityCreated(savedInstanceState);    ViewUtils.inject(this, getPreferenceScreen()); //注入view和事件    ...}// 其他重载// inject(View view);// inject(Activity activity)// inject(PreferenceActivity preferenceActivity)// inject(Object handler, View view)// inject(Object handler, Activity activity)// inject(Object handler, PreferenceGroup preferenceGroup)// inject(Object handler, PreferenceActivity preferenceActivity)

HttpUtils使用方法

JsonObject.java

package com.xiaofei.app.xutils; import java.util.ArrayList; /**  * Created by Administrator on 2016/4/6.  */ public class JsonObject {
       private String login;     private ArrayList
    
      user=new ArrayList
     
      ();     public String getLogin() {
           return login;     }     public void setLogin(String login) {
           this.login = login;     }     public ArrayList
      
        getUser() {
           return user;     }     public void setUser(ArrayList
       
         user) {
           this.user = user;     }     @Override     public String toString() {
           return "JsonObject{" +                 "login='" + login + '\'' +                 ", user=" + user +                 '}';     } }
       
      
     
    

User.java

package com.xiaofei.app.xutils; /**  * Created by Administrator on 2016/4/6.  */ public class User {
       private int id;     private String username;     private String password;     private String role;     public int getId() {
           return id;     }     public void setId(int id) {
           this.id = id;     }     public String getUsername() {
           return username;     }     public void setUsername(String username) {
           this.username = username;     }     public String getPassword() {
           return password;     }     public void setPassword(String password) {
           this.password = password;     }     public String getRole() {
           return role;     }     public void setRole(String role) {
           this.role = role;     }     public User(int id,String username, String password, String role) {
          this.id=id;         this.username = username;         this.password = password;         this.role = role;     }     @Override     public String toString() {
           return "User{" +                 "id=" + id +                 ", username='" + username + '\'' +                 ", password='" + password + '\'' +                 ", role='" + role + '\'' +                 '}';     }     public User()     {
       } }

MainActivity2.java

package com.xiaofei.app.xutils; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import com.google.gson.Gson; import com.lidroid.xutils.HttpUtils; import com.lidroid.xutils.exception.HttpException; import com.lidroid.xutils.http.RequestParams; import com.lidroid.xutils.http.ResponseInfo; import com.lidroid.xutils.http.callback.RequestCallBack; import com.lidroid.xutils.http.client.HttpRequest; import java.util.ArrayList; public class MainActivity2 extends Activity {
    private EditText editText_username;  private EditText editText_password;     private Button button_login;     private TextView textView_info;     @Override     protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main2);         editText_username= (EditText) findViewById(R.id.editText_username);         editText_password= (EditText) findViewById(R.id.editText_password);         button_login= (Button) findViewById(R.id.button_login);         textView_info=(TextView)findViewById(R.id.info);         button_login.setOnClickListener(new View.OnClickListener() {
               @Override             public void onClick(View v) {
                   String username=editText_username.getText().toString();                 String password=editText_password.getText().toString();                 HttpUtils httpUtils=new HttpUtils();                 String url="http://192.168.1.101:8080/user/LoginServlet";                 RequestParams params=new RequestParams();           params.addQueryStringParameter("username",username);           params.addBodyParameter("password",password);                 httpUtils.send(HttpRequest.HttpMethod.POST, url, params, new RequestCallBack
    
     () {
                       @Override                     public void onStart() {
                           super.onStart();                         textView_info.setText("conn...");                     }                     @Override                     public void onLoading(long total, long current, boolean isUploading) {
                           super.onLoading(total, current, isUploading);                         if (isUploading) {
                               textView_info.setText("upload: " + current + "/" + total);                         } else {
                               textView_info.setText("reply: " + current + "/" + total);                         }                     }                     @Override                     public void onSuccess(ResponseInfo
     
       responseInfo) {
                         String result=responseInfo.result;                         System.out.println(result);                         Gson gson = new Gson();                         JsonObject object = gson.fromJson(result, JsonObject.class);                         ArrayList
      
        list=object.getUser();                         int count=list.size();                         String username="";                         for (int i=0;i
      
     
    

activity_main2.xml

 

BitmapUtils 使用方法

BitmapUtils bitmapUtils = new BitmapUtils(this);// 加载网络图片bitmapUtils.display(testImageView, "http://bbs.lidroid.com/static/image/common/logo.png");// 加载本地图片(路径以/开头， 绝对路径)bitmapUtils.display(testImageView, "/sdcard/test.jpg");// 加载assets中的图片(路径以assets开头)bitmapUtils.display(testImageView, "assets/img/wallpaper.jpg");// 使用ListView等容器展示图片时可通过PauseOnScrollListener控制滑动和快速滑动过程中时候暂停加载图片listView.setOnScrollListener(new PauseOnScrollListener(bitmapUtils, false, true));listView.setOnScrollListener(new PauseOnScrollListener(bitmapUtils, false, true, customListener));

前提Bmob云服务里有数据

product.java

package com.xiaofei.app.bitmaputils; import cn.bmob.v3.BmobObject; import cn.bmob.v3.datatype.BmobFile; /**  * Created by Goddess on 2016/4/25.  */ public class product extends BmobObject{
       private String name;     private BmobFile pic;     private double price;     private double discount;     public product()     {
       }     public product(String name, BmobFile pic, double price, double discount) {
           this.name = name;         this.pic = pic;         this.price = price;         this.discount = discount;     }     public double getDiscount() {
           return discount;     }     public void setDiscount(double discount) {
           this.discount = discount;     }     public String getName() {
           return name;     }     public void setName(String name) {
           this.name = name;     }     public BmobFile getPic() {
           return pic;     }     public void setPic(BmobFile pic) {
           this.pic = pic;     }     public double getPrice() {
           return price;     }     public void setPrice(double price) {
           this.price = price;     } }

ProductListAdapter.java

package com.xiaofei.app.bitmaputils; import android.content.Context; import android.os.Environment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.lidroid.xutils.BitmapUtils; import java.util.List; /**  * Created by Goddess on 2016/4/25.  */ public class ProductListAdapter extends BaseAdapter {
       private Context context;     private List
    
      products;     public ProductListAdapter(Context context, List
     
       products) {
           this.context = context;         this.products = products;     }     public List
      
        getProducts() {
           return products;     }     public void setProducts(List
       
         products) {
           this.products = products;     }     @Override     public int getCount() {
           return products.size();     }     @Override     public Object getItem(int position) {
           return products.get(position);     }     @Override     public long getItemId(int position) {
           return position;     }     @Override     public View getView(int position, View convertView, ViewGroup parent) {
           ViewHolder vh;         if (convertView == null) {
               convertView = LayoutInflater.from(context).inflate(R.layout.product_list_item, null);             vh = new ViewHolder();             vh.textView_name = (TextView) convertView.findViewById(R.id.textView_name);             vh.textView_price = (TextView) convertView.findViewById(R.id.textView_price);             vh.textView_discount = (TextView) convertView.findViewById(R.id.textView_discount);             vh.imageView_product_image = (ImageView) convertView.findViewById(R.id.imageView_product_image);             convertView.setTag(vh);         }         vh = (ViewHolder) convertView.getTag();         product p = products.get(position);         vh.textView_name.setText(p.getName());         vh.textView_price.setText("￥" + Math.round((p.getPrice() * (p.getDiscount() / 10) * 100.00)) / 100.00);         vh.textView_discount.setText(String.valueOf(p.getDiscount()) + "折");        //用于缓存图片文件 Lru算法         //用于缓存图片文件 Lru算法         String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/x-utils";         BitmapUtils bitmapUtils = new BitmapUtils(context, path);         bitmapUtils.configDefaultBitmapMaxSize(100, 100);         bitmapUtils.display(vh.imageView_product_image, p.getPic().getFileUrl(context));         return convertView;     }     static class ViewHolder {
           TextView textView_name;         TextView textView_price;         TextView textView_discount;         ImageView imageView_product_image;     } }
       
      
     
    

ProductListActivity.java

package com.xiaofei.app.bitmaputils; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ListView; import java.util.ArrayList; import java.util.List; import cn.bmob.v3.Bmob; import cn.bmob.v3.BmobQuery; import cn.bmob.v3.listener.FindListener; public class ProductListActivity extends AppCompatActivity {
       private ListView productListView;     private ProductListAdapter pla;     private List
    
      products=new ArrayList<>();     @Override     protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);         setContentView(R.layout.activity_product_list);         // 初始化 Bmob SDK         // 使用时请将第二个参数Application ID替换成你在Bmob服务器端创建的Application ID         Bmob.initialize(this, "0547745e9dca58be6361ccef5131958b");         productListView=(ListView)findViewById(R.id.product_list_view);         pla=new ProductListAdapter(ProductListActivity.this,products);         loadData();     }     private void loadData()     {
           final View loadView=getLayoutInflater().inflate(R.layout.load_data,null);         productListView.addHeaderView(loadView);         productListView.setAdapter(pla);         BmobQuery
     
       query=new BmobQuery<>();         query.findObjects(ProductListActivity.this, new FindListener
      
       () {
               @Override             public void onSuccess(List
       
         list) {
                   System.out.println(list.size());                 products=list;                 productListView.removeHeaderView(loadView);                 pla.setProducts(products);                 pla.notifyDataSetChanged();             }             @Override             public void onError(int i, String s) {
               }         });     } }
       
      
     
    

button_bg.xml

load_data.xml

product_list_item.xml

activity_product_list.xml