获取公交车离站点的距离数据 - 字符滋滋

1.界面代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.nicegoodnew.Car.Bus_infomation_Activity">
    <Button
        android:id="@+id/bus_query"
        android:layout_marginTop="10dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="公交查询"
        android:textSize="20dp"
        android:gravity="center"
        android:background="@drawable/shape_bus_infomation"
       />
    <TextView
        android:layout_marginTop="20dp"
        android:layout_marginLeft="10dp"
        android:layout_width="200dp"
        android:layout_height="50dp"
        android:textSize="25dp"
        android:text="一号站台"
        android:gravity="center"
        android:background="@drawable/shape_bus_infomation"
        />
    <LinearLayout
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="一号公交"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/distance_one"
            android:layout_marginLeft="5dp"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="距离8000m"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/remaining_time_one"
            android:layout_marginLeft="5dp"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="剩余时间20分钟"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="二号公交"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/distance_two"
            android:layout_marginLeft="5dp"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="距离4000m"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/remaining_time_two"
            android:layout_marginLeft="5dp"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="剩余时间10分钟"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
    </LinearLayout>
    />
    <TextView
        android:layout_marginLeft="10dp"
        android:layout_width="200dp"
        android:layout_height="50dp"
        android:textSize="25dp"
        android:text="二号站台"
        android:gravity="center"
        android:background="@drawable/shape_bus_infomation"
        />
    <LinearLayout
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="一号公交"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/distance_three"
            android:layout_marginLeft="5dp"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="距离4000m"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/remaining_time_three"
            android:layout_marginLeft="5dp"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="剩余时间10分钟"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <TextView
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            android:text="二号公交"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/distance_four"
            android:layout_marginLeft="5dp"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:text="距离8000m"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
        <TextView
            android:id="@+id/remaining_time_four"
            android:layout_marginLeft="5dp"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:text="剩余时间20分钟"
            android:textSize="20dp"
            android:gravity="center"
            android:background="@drawable/shape_car_speed"
            />
    </LinearLayout>
    <TextView
        android:id="@+id/query"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="查询"
        android:textSize="20dp"
        android:background="#2d52f5"
        android:gravity="center"

        />
</LinearLayout>

2.代码部分

package com.example.nicegoodnew.Car;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;

import com.example.nicegoodnew.Car_util.Bus_infomain_json1;
import com.example.nicegoodnew.R;
import com.example.nicegoodnew.util.BaseRequest;
import com.google.gson.Gson;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;

public class Bus_infomation_Activity extends AppCompatActivity {
    //创建一个List集合
    List<Bus_infomain_json1> list = new ArrayList<>();
    //创建一个数组，存储数据
    String [] carno = {"1","2","3","4"};
    //定义TextVew
    private TextView distance_one;
    private TextView distance_two;
    private TextView distance_three;
    private TextView distance_four;
    //在Handle中运行数据
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            //使用switch case运行
            switch (msg.what){
                //case的值为0的时候运行distance_one，distance_two，distance_three，distance_four
                case 0:
                    distance_one.setText("距离"+list.get(0).getDist().get(0) + "m");
                    distance_two.setText("距离"+list.get(0).getDist().get(1) + "m");
                    distance_three.setText("距离"+list.get(1).getDist().get(0) + "m");
                    distance_four.setText("距离"+list.get(1).getDist().get(1) + "m");
                    break;
                //case的值 运行一下的数据
                case 1:
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            initBusCar();
                        }
                    }).start();
                    break;

            }
        }
    };
    //在方法中写需要的一些条件
    private void initBusCar() {

        new Thread(new Runnable() {
            @Override
            public void run() {
                //有四辆公交车 所以这里需要用for循环
                Map<String, String> map = new HashMap<String, String>();//使用Map  HashMap
                Gson gson = new Gson();
                for(int i=0;i<carno.length;i++){

                    map.put("action", "get");               //map.put是需要进行Post请求的一些方式
                    map.put("object", "trafficcar");
                    map.put("station",carno[i]);            //canno[i]就是上面carno数组里面的数据
                    String path = "http://dev1.cn:8888";    //给path设置访问网站
                    String data = gson.toJson(map);
　　　　　　　　　　　　// BaseRequest.postRequest1 是自己写的一个Post方法

                    String string = BaseRequest.postRequest1(data, path);
                    //全部写在一个for循环中 怕取到空值 所以判断一下 如果为空 就放回return一下
                    if("".equals(string)){
                        return;
                    }
                    //取json页面中的数据  用list.add把数据取出来
                    Bus_infomain_json1 bus_infomain_json1 = gson.fromJson(string, Bus_infomain_json1.class);
                    list.add(bus_infomain_json1);
                }
                //有四辆公交车 如果list.size<4就返回继续循环
                if(list.size()<4){
                    return;
                }
                //handle.sendEmptyMessage运行一下 从what 0 开始运行
                handler.sendEmptyMessage(0);
            }
        }).start();
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bus_infomation_);

        distance_one= (TextView) findViewById(R.id.distance_one);
        distance_two = (TextView) findViewById(R.id.distance_two);
        distance_three = (TextView) findViewById(R.id.distance_three);
        distance_four = (TextView) findViewById(R.id.distance_four);
        //1.第一步先创建一个 initBusCar方法
        initBusCar();
        //2.第二步创建一个 new BusCarThread().start();
         new TimeThread().start();//5秒刷新数据

    }
    public class TimeThread extends Thread {
        //重写run方法
        @Override
        public void run() {
            super.run();
            do {
                try {
                    //每隔一秒 发送一次消息
                    Thread.sleep(3000);
                    Message msg = new Message();
                    //消息内容 为MSG_ONE
                    msg.what = 1;
                    //发送
                    handler.sendMessage(msg);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            } while (true);
        }
    }}

3.