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;

              

                     

              }

       }