根据公司项目~搭建开发的框架（三）

 

 

效果图

初始

 

输入数据 Add

 

显示数据 Query

 

实现过程的主要代码：

• Click事件中  case R.id.add:
                       Person person= new   Person();
                       person. name = name .getText().toString();
                       person. age =Integer.valueOf( age .getText().toString());
                       Map param= new   HashMap();
                       param.put( "person" , person);
                        task   =   new   Task(Config. TASK_ADD , param);
                       MainService.addNewTask( task );
                        break ;
                 case   R.id. query :           
                        task   =   new   Task(Config. TASK_QUERY ,   null );
                       MainService.addNewTask( task );
                        break ;
• 开始执行任务 public static void addNewTask(final Task ts) {
                 new   Thread() {
                        public   void   run() {
                              mainService .doTask(ts);
                       }
                }.start();
         }
  
  
          public   void   doTask(Task task) {
                 if   (task ==   null )
                        return ;
                Map param = task.getTaskParam();
                ArrayList list =   new   ArrayList<Object>();
                Message message =   handler .obtainMessage();
                 int   taskid = task.getTaskID();
                 switch   (taskid) {
                 case   Config. TASK_ONE :
                       String test =   "test" ;
                       message. obj   = test;
                        break ;
                 case   Config. TASK_ADD :
                        personService .insertPerson((Person)param.get( "person" ));
                        break ;
                 case   Config. TASK_QUERY :
                       list= personService .getPersonList();
                       message. obj   = list;
                        break ;
                }
                message. what   = task.getTaskID();
                 handler .sendMessage(message);
         }
  
  
         
• PersonService介绍 ,实现增加和查询的功能public ArrayList<Person> getPersonList() {
  
  

                Cursor cursor =  dbHelper .query( dbHelper . TB_PERSON ,  new  String[] {  "_id" ,

                              "name" ,  "age"  },  null ,  null ,  null ,  null ,  null ,  null );

                ArrayList<Person> list =  new  ArrayList<Person>();

                 while  (cursor.moveToNext()) {

                       Person person =  new  Person();

                       person. id  = cursor.getInt(0);

                       person. name  = cursor.getString(cursor.getColumnIndex( "name" ));

                       person. age =cursor.getInt(2);

                       list.add(person);

                }

                cursor.close();

                 return  list;

         }
  public void insertPerson(Person person) {

                ContentValues cv =  new  ContentValues();

                cv.put( "name" , person. name );

                cv.put( "age" , person. age );

                 dbHelper .insert( dbHelper . TB_PERSON , cv);

         }

  
  
• 返回数据给activity  

          public Handler handler = new Handler() {

               @Override

               public   void  handleMessage(Message msg) {

                      super .handleMessage(msg);

                     IActivity ac =  null ;

                     String activityName =  "" ;

                      switch  (msg. what ) {

                      case  Config. TASK_ONE :

                           activityName =  "AndroidTaskActivity" ;

                            break ;

                      case  Config. TASK_QUERY :

                           activityName =  "AndroidTaskActivity" ;

                            break ;

                     }

                     ac = MainService.getActivityByName(activityName);

                     ac.refresh(msg. what , msg. obj );

              }

       };

     

• 显示在当前activity

     public void refresh(Object... param) {

               int   flag = (Integer) param[0];

               switch   (flag) {

               case   Config. TASK_ONE :

                     String str = (String) param[1];

                      et .setText(str);

                      break ;

               case   Config. TASK_QUERY :

                     ArrayList ls= new   ArrayList();

                     ls=(ArrayList) param[1];

                     Person P= new   Person();

                     P=(Person) ls.get(1);

                      et .setText( "name:  " +P. name + "  age:  " +P. age + "  id:  " +P. id );

                      break ;

              

                     

              }

       }