我正在实施 Retrofit Library-2.0.1 ,但我得到的是 NULL 数据,如下图所示。
我正在尝试使用简单的GET方法从API加载所有类别,如下所示......
http://dev.punchprint.com.au/webservices/WebService.php?method=listCategory
以下是浏览器响应...
{
"error": "0",
"success": "1",
"message": "List Category",
"data": [
{
"id": "3",
"name": "Pendants",
"link_rewrite": "pendants",
"image": "http://punchprint.com.au/c/3-category_default/pendants.jpg",
"products": [
"1",
"8",
"9",
"11",
"12",
"13",
"14",
"37",
"42",
"79",
"80"
]
},
{
"id": "7",
"name": "Key Rings",
"link_rewrite": "key-rings",
"image": "http://punchprint.com.au/c/7-category_default/key-rings.jpg",
"products": [
"21",
"37",
"47",
"51"
]
},
{
"id": "8",
"name": "Personalised Phone Cover",
"link_rewrite": "personalised-phone-cover",
"image": "http://punchprint.com.au/c/8-category_default/personalised-phone-cover.jpg",
"products": [
"40",
"41",
"54",
"55",
"57",
"58",
"59",
"61"
]
},
{
"id": "14",
"name": "Personalised Crystal & Rock",
"link_rewrite": "personalised-crystal-rock",
"image": "",
"products": [
"52",
"53",
"56",
"67",
"71",
"72",
"73",
"74",
"75",
"76",
"77",
"78"
]
},
{
"id": "6",
"name": "Gold Pendants",
"link_rewrite": "gold-pendants",
"image": "http://punchprint.com.au/c/6-category_default/gold-pendants.jpg",
"products": [
"31",
"32",
"33"
]
},
{
"id": "15",
"name": "Engraved crystal",
"link_rewrite": "engraved-crystal",
"image": "http://punchprint.com.au/c/15-category_default/engraved-crystal.jpg",
"products": [
"62",
"63",
"64",
"65",
"66",
"68"
]
},
{
"id": "10",
"name": "Gift Ideas",
"link_rewrite": "gift-ideas",
"image": "http://punchprint.com.au/c/10-category_default/gift-ideas.jpg",
"products": [
"23",
"25",
"26",
"43",
"45",
"46",
"48",
"50",
"52",
"67",
"68"
]
},
{
"id": "13",
"name": "Kid's Special",
"link_rewrite": "kid-s-special",
"image": "",
"products": [
"48"
]
},
{
"id": "9",
"name": "Zippo",
"link_rewrite": "zippo",
"image": "",
"products": [
"27"
]
},
{
"id": "12",
"name": "Pet Tags",
"link_rewrite": "pet-tags",
"image": "http://punchprint.com.au/c/12-category_default/pet-tags.jpg",
"products": [
"22",
"37"
]
},
{
"id": "16",
"name": "Rock Photo",
"link_rewrite": "rock-photo",
"image": "http://punchprint.com.au/c/16-category_default/rock-photo.jpg",
"products": [
"67",
"70"
]
}
]
}
我试过的就像下面......
的build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "com.lazy_loading.android01.lazyloading"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.2.0'
compile 'com.squareup.retrofit2:retrofit:2.0.1'
compile 'com.squareup.retrofit2:converter-gson:2.0.1'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.squareup.okhttp3:okhttp:3.2.0'
}
MainActivity.java
package com.lazy_loading.android01.lazyloading;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ListView;
import android.widget.TextView;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class MainActivity extends AppCompatActivity {
//Default variables
final static String BASE_URL = "http://dev.punchprint.com.au/webservices/WebService.php/";
//Widgets
private ListView category_list;
private TextView tv_id, tv_name;
private ProgressDialog progressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
void init() {
find_view_by_id();
initializeElements();
CommonMethods.showProgressDialog(progressDialog, "Loading...please wait!!");
loadCategories();
}
void find_view_by_id() {
//category_list = (ListView) findViewById(R.id.category_list);
tv_id = (TextView) findViewById(R.id.id1);
tv_name = (TextView) findViewById(R.id.name1);
}
void initializeElements() {
progressDialog = new ProgressDialog(this);
}
void loadCategories() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
ApiEndPointInterface apiInterface = retrofit.create(ApiEndPointInterface.class);
final Call<Categories> categoriesCall = apiInterface.getCategories();
categoriesCall.enqueue(new Callback<Categories>() {
@Override
public void onResponse(Call<Categories> call, Response<Categories> response) {
Log.e("response: ", "response:-->" + response.toString());
if (response.isSuccessful()) {
CommonMethods.dismissProgressDialog(progressDialog);
String id = response.body().getId();
Log.e("id: ", "id:-->" + response.body().getId());
String name = response.body().getName();
tv_id.setText(id);
tv_name.setText(name);
}
}
@Override
public void onFailure(Call<Categories> call, Throwable t) {
//Log.e("Error: ", "Error:-->" + t.toString());
}
});
}
}
ApiEndPointInterface.java
package com.lazy_loading.android01.lazyloading;
import retrofit2.Call;
import retrofit2.http.GET;
/**
* Created by android01 on 08-04-2016.
*/
public interface ApiEndPointInterface {
@GET("?method=listCategory")
Call<Categories> getCategories();
}
模型类如下......
Categories.java
package com.lazy_loading.android01.lazyloading;
/**
* Created by android01 on 08-04-2016.
*/
public class Categories {
/**
* id : 3
* name : Pendants
* link_rewrite : pendants
* image : http://punchprint.com.au/c/3-category_default/pendants.jpg
* products : ["1","8","9","11","12","13","14","37","42","79","80"]
*/
private String id;
private String name;
private String image;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
我也在MainActivity中尝试过以下代码,但它不起作用,它还为我提供了 null 数据。
Thread thread = new Thread() {
@Override
public void run() {
try {
Response response = categoriesCall.execute();
Categories categories = (Categories) response.body();
Log.e("Category: ", "Category:-->" + categories.toString());
Log.e("Id: ", "Id:-->" + categories.getId());
} catch (IOException e) {
e.printStackTrace();
}
}
};
thread.start();
任何帮助都会非常明显,在此先感谢。
答案 0 :(得分:1)
您的型号不正确。它应该是这样的:
public class Categories {
@SerializedName("error")
String error;
@SerializedName("success")
String success;
@SerializedName("message")
String message;
@SerializedName("data")
ArrayList<Data> data;
public static class Data {
@SerializedName("id")
String id;
@SerializedName("name")
String name;
@SerializedName("link_rewrite")
String link;
@SerializedName("image")
String image;
@SerializedName("products")
ArrayList<String> products;
}
}
现在生成了他们的吸气剂。