从 Android 应用程序中读取 Google 电子表格并列出该数据？

Question

我正在开发一个 Android 应用程序来读取/写入谷歌表格上的数据。我对写入部分没问题，但读取操作只显示一个空白屏幕，没有引发错误。如果有一个“最新的”运行良好的 android 程序可以从谷歌表中读取数据，那将会很有帮助。

Answer 1

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.DefaultRetryPolicy;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.RetryPolicy;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject
import java.util.ArrayList;
import java.util.HashMap;


public class ListofCars extends AppCompatActivity implements 
AdapterView.OnItemClickListener {

ListView listView;
SimpleAdapter adapter;
ProgressDialog loading;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.carslist);
    listView = findViewById(R.id.listof_cars);
    listView.setOnItemClickListener(this);

    getItems();
}


private void getItems() {
   
    loading = ProgressDialog.show(this, "Loading", "please wait", false, true);
    StringRequest stringRequest = new StringRequest(Request.Method.GET, 
 "https://script.google.com/macros/s/AKfycbxOLElujQcy1- 
  ZUer1KgEvK16gkTLUqYftApjNCM_IRTL3HSuDk/exec? 
  id=YOUR_SPREAD_SHEET_IDHERE&sheet=YOURSHEETNAMEHERE",

            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    parseItems(response);
                }
            },

            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                   
                }
            }


    );

    int socketTimeOut = 50000;
    RetryPolicy policy = new DefaultRetryPolicy(socketTimeOut, 0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);

    stringRequest.setRetryPolicy(policy);

    RequestQueue queue = Volley.newRequestQueue(this);
    queue.add(stringRequest);

}

void parseItems(String jsonResponse) {
    
    ArrayList<HashMap<String, String>> list = new ArrayList<>();

    try {
        
        JSONObject jobj = new JSONObject(jsonResponse);
        JSONArray jarray = jobj.getJSONArray("listofcars");

        for (int i = 0; i < jarray.length(); i++) {
            
            JSONObject jo = jarray.getJSONObject(i);

            String car = jo.getString("car");
            String type = jo.getString("type");
            
            HashMap<String, String> item = new HashMap<>();
            item.put("car", car);
            item.put("type", type);
  
            list.add(item);

        }
    } catch (JSONException e) {

        e.printStackTrace();
    }


    adapter = new SimpleAdapter(this,list, R.layout.list_item_row,
    new String[]{"car","type"},new int[]{R.id.car_name,R.id.car_type});

    listView.setAdapter(adapter);
    loading.dismiss();
    
}

public void onItemClick(@Nullable AdapterView<?> parent, @Nullable 
View view, int position, long id) {
   
    Intent intent = new Intent(this, Cardetails.class);
    HashMap<String,String> map =(HashMap)parent.getItemAtPosition(position);
   
    String car = map.get("car");
    String type = map.get("type");

    intent.putExtra("car",car);
    intent.putExtra("type",type);

    startActivity(intent);

}

@Override
public void onPointerCaptureChanged(boolean hasCapture) {}}

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