Question

1.package com.example.user.batroomapp;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import com.example.user.batroomapp.gsontopojo.MyPojo;
import com.example.user.batroomapp.gsontopojo.Routes;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

我是从Json到Gson的班级，现在我不知道如何继续。请帮助我卡住。

公共类DirectionJson扩展了AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.map_fragment);


    }
    String apiKeyDirection = "My Api Direction";

            public static class JsonTask extends AsyncTask <String, String, List<Routes>> {

            @Override
            protected List<Routes> doInBackground(String... params) {
                    HttpURLConnection connection = null;
                    BufferedReader reader = null;
                    URL url;
                    {
                            try {
                                    url = new URL(params[0]);
                                    connection = (HttpURLConnection) url.openConnection();

                                    InputStream stream = connection.getInputStream();
                                    reader = new BufferedReader(new InputStreamReader(stream));
                                    StringBuffer buffer=new StringBuffer();
                                    String line = "";
                                    while ((line = reader.readLine()) != null) {
                                            buffer.append(line);
                                            Log.d("aaa",""+line);
                                    }
                                    Gson gson=new Gson();
                                    MyPojo myPojo =gson.fromJson(line,MyPojo.class);
                                    for (Routes routes:myPojo.getRoutes());


                                    String finalJason = buffer.toString();
                                    JSONObject parentObject = new JSONObject(finalJason);
                                    JSONArray parentArrey = parentObject.getJSONArray("routes");

                                    List<Routes>routeslist = new ArrayList<>();

// JSONArray parentArrey2 = parentObject.getJSONArray（＆＃34; geocoded_waypoints＆＃34;）; for（int i = 0; i

                                      routeslist.add(routes);
                                    }
                                    return routeslist;

                            } catch (MalformedURLException e) {
                                    e.printStackTrace();
                            } catch (IOException e) {
                                    e.printStackTrace();
                            } catch (JSONException e) {
                                    e.printStackTrace();
                            } finally {
                                    if (connection != null) {
                                            connection.disconnect();
                                    }
                                    try {
                                            if (reader != null) {
                                                    reader.close();
                                            }
                                    } catch (IOException e) {
                                            e.printStackTrace();
                                    }

                            }
                    }
                    return null;
            }

            @Override
            protected void onPostExecute(List<Routes> result) {

                    super.onPostExecute(result);
                    Log.d("json",result.toString());
                    Gson gson = new GsonBuilder().create();
                   // MyPojo myPoj = gson.fromJson(result, MyPojo.class);
                    //Log.d("bbb", myPoj.toString());

            }

            private void parseJson(String data){
                    if (data==null)
                            return;

            }

    }

}

这是点击

protected void onCreate（Bundle savedInstanceState）{ super.onCreate（savedInstanceState）;

setContentView(R.layout.map_fragment);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
final SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
        .findFragmentById(R.id.mapFragment);
mapFragment.getMapAsync(this);
Button bDriving = (Button) findViewById(R.id.bDriving);


bDriving.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        new DirectionJson.JsonTask().execute
                ("https://maps.googleapis.com/maps/api/directions/json?origin=sydney" +
                        ",au&destination=perth,au&waypoints=via:-37.81223%2C144.96254%7Cvia:" +
                        "-34.92788%2C138.60008&key=" + apiKeyDirection);

    }
});

如何从Gson中绘制我在地图上获得谷歌地图方向折线的值？

0 个答案: