android 这个思路使用 Message 和 Handler 咋挂了？

谁学逆向工程 2019-06-19 03:00:29

mHandler 中每行 if 语句都设了断点，但是只触发了一次

package com.example.yingpindengji;



import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.EditText;

import android.widget.Spinner;



import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;





public class MainActivity extends AppCompatActivity {

    Spinner lstYingPinKeXi, lstYingPinZhiWei, lstXingBie, lstXueLi, lstXueWei;

    EditText ediXingMing, ediChuShengRiQi, ediNianLing, ediBiYeXueXiao, ediZhuanYe, ediBiYeShiJian, ediTeChang, ediLianXiFangShi;

    

    final int iYiJiKeShi = 0x1;

    final  int iErJiKeShi = 0x2;

    final  int iYingPinZhiWei = 0x3;

    final  int iXingBie = 0x4;

    final  int iXueLi = 0x5;

    final  int iXueWei = 0x6;



    Handler mHandler = new Handler() {

        public void handleMessage(Message msg) {

            if (msg.what == iYiJiKeShi) {

                String[] arrYiJiKeShi = (String[]) ((ArrayList<String>) msg.obj).toArray();



            } else if (msg.what == iYingPinZhiWei) {

                String[] arrYingPinZhiWei = (String[]) ((ArrayList<String>) msg.obj).toArray();

            } else if (msg.what == iXingBie) {

                String[] arrXingBie = (String[]) ((ArrayList<String>) msg.obj).toArray();

            } else if (msg.what == iXueLi) {

                String[] arrXueLi = (String[]) ((ArrayList<String>) msg.obj).toArray();

            } else if (msg.what == iXueWei) {

                String[] arrXueWei = (String[]) ((ArrayList<String>) msg.obj).toArray();

            }

        }

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initControlHanlde();//初始化控件句柄



        new Thread(new Runnable() {

            @Override

            public void run() {

            







                    Message msg = new Message();

                    msg.what = iYiJiKeShi;

                    msg.obj = ArrLstYiJiKeShi;

                    mHandler.sendMessage(msg);



                    msg.what = iYingPinZhiWei;

                    msg.obj = ArrLstYingPinZhiWei;

                    mHandler.sendMessage(msg);



                    msg.what=iXingBie;

                    msg.obj=ArrLstXingBie;

                    mHandler.sendMessage(msg);



                    msg.what=iXueLi;

                    msg.obj=ArrLstXueLi;

                    mHandler.sendMessage(msg);



                    msg.what=iXueWei;

                    msg.obj=ArrLstXueWei;

                    mHandler.sendMessage(msg);



                    con.close();

                } catch (ClassNotFoundException e) {

                    //数据库驱动类异常处理

                    System.out.println("Sorry,can`t find the Driver!");

                    e.printStackTrace();

                } catch (SQLException e) {

                    //数据库连接失败异常处理

                    e.printStackTrace();

                } catch (Exception e) {

                    // TODO: handle exception

                    e.printStackTrace();

                }



            }

        }).start();

    }



    void initControlHanlde() {

      

    }

}