php - 使用Retrofit、PHP、JSON和WAMP从Android应用程序获取Mysql数据库的信息

Question

PHP文件存放在WAMP的www目录下

<?php
//Response array JSON
$response = array();

//Connexion to the db local in WAMP
include("connexion_db.php");
$idcom = connexobject("database_app_android","myparam");

$sql = "SELECT * FROM products";

$result = $idcom->query($sql);

if(!$result)
{
    //Cannot read
    $response["success"] = 0;
    $response["mesage"] = "SQL query has timed out";
}
else
{
    if($result->num_rows > 0)
    {
        //Products founds
        $response["products"] = array();

        while($row = $result->fecth_object())
        {
            $product = array();
            foreach ($row as $key => $value)
            {
                $product[$key] = $value;
            }

            //Add product to the response JSON array
            array_push($response["products"], $product);
        }

        $response["success"] = 1;
    }
    else
    {
        //0 product found
        $response["success"] = 0;
        $response["mesage"] = "No products found";
    }
}

//Encode and send response in JSON format
echo(json_encode($response));

$response->free();
$result->free();
$idcom->close();
?>

Android API

public interface CatalogAPI {
    @GET("/products")
    Call<List<Product>> getProductList();

    @GET("/products/{product}")
    Call<Product> getProduct(@Path("product") int productId);
}

使用改造的Android部分

//Retrofit
Retrofit retrofit = new Retrofit.Builder()
        .baseUrl("http://10.0.2.2:3000/MyAndroidApp/get_all_product.php")
        .addConverterFactory(GsonConverterFactory.create())
        .build();
CatalogAPI service = retrofit.create(CatalogAPI.class);
service.getProductList().enqueue(new Callback<List<Product>>() {
    @Override
    public void onResponse(Call<List<Product>> call, Response<List<Product>> response) {
        Log.i("retrofit","DOWNLOAD OK");
        for (Product p : response.body())
        {
            Log.i("retrofit","Product : " + p.getName());
            catalog.add(p);
        }
    }

    @Override
    public void onFailure(Call<List<Product>> call, Throwable t) {

    }
});

请问，为什么这不起作用？我用的是Android studio模拟器。 php 脚本将 mysql 数据库中找到的所有产品编码为 json。 MySQL数据库位于本地服务器wamp上

Answer 1

请在您的改造客户端中添加日志拦截器，这将有助于查找问题所在。

等级变化

compile 'com.squareup.okhttp3:logging-interceptor:3.3.1'  

代码更改

HttpLoggingInterceptor logging = new HttpLoggingInterceptor();  
// set your desired log level
logging.setLevel(Level.BODY);

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();  
// add your other interceptors …

// add logging as last interceptor
httpClient.addInterceptor(logging);  // <-- this is the important line!

Retrofit retrofit = new Retrofit.Builder()  
   .baseUrl(API_BASE_URL)
   .addConverterFactory(GsonConverterFactory.create())
   .client(httpClient.build())
   .build();