我试图通过使用跟踪端点链接从Jamendo API获取数据，以仅获取瑜伽音乐，然后将其显示给另一个Activity。
- 我做了一个MusicListScreen，它有显示从API获取的数据的适配器。
- YogaTracks类具有我应该获得的json响应的属性。
- JSON响应：
{
"headers":{
"status":"success",
"code":0,
"error_message":"",
"warnings":"",
"results_count":2
},
"results":[
{
"id":"1532771",
"name":"Let Me Hear You I",
"duration":54,
"artist_id":"461414",
"artist_name":"Paul Werner",
"artist_idstr":"PaulWernerMusic",
"album_name":"Let Me Hear You I",
"album_id":"404140",
"license_ccurl":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/",
"position":1,
"releasedate":"2018-03-15",
"album_image":"https:\/\/usercontent.jamendo.com?type=album&id=404140&width=300&trackid=1532771",
"audio":"https:\/\/prod-1.storage.jamendo.com\/?trackid=1532771&format=mp31&from=app-devsite",
"audiodownload":"https:\/\/prod-1.storage.jamendo.com\/download\/track\/1532771\/mp32\/",
"prourl":"https:\/\/licensing.jamendo.com\/track\/1532771",
"shorturl":"https:\/\/jamen.do\/t\/1532771",
"shareurl":"https:\/\/www.jamendo.com\/track\/1532771",
"waveform":"{
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} ",MusicListScrenn类
package com.minhhoang.yolo_yoga;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
import com.google.gson.JsonArray;
import com.minhhoang.yolo_yoga.adapters.AdapterHome;
import com.minhhoang.yolo_yoga.adapters.AdapterMusicList;
import com.minhhoang.yolo_yoga.databasehelper.DataManager;
import com.minhhoang.yolo_yoga.models.ModelBlogCategory;
import com.minhhoang.yolo_yoga.models.ModelMainCategory;
import com.minhhoang.yolo_yoga.models.ModelMusicCategory;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
import JamendoAPI.JamendoApiService;
import JamendoAPI.YogaTracks;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class MusicListScreen extends AppCompatActivity {
RecyclerView recMainCategory;
DataManager dataManager;
ArrayList<YogaTracks> mainCategoryList;
AdapterMusicList adapterMainCategory;
TextView tvtitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_music_list_screen);
getSupportActionBar().hide();
mainCategoryList = new ArrayList<YogaTracks>();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://api.jamendo.com")
.addConverterFactory(GsonConverterFactory.create())
.build();
JamendoApiService api = retrofit.create(JamendoApiService.class);
Call<YogaTracks> call = api.getYogaTracks("db9569db", "jsonpretty", "meditation");
call.enqueue(new Callback<YogaTracks>() {
@Override
public void onResponse(Call<YogaTracks> call, Response<YogaTracks> response) {
if(response.isSuccessful()){
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
YogaTracks obj = new YogaTracks();
obj.setAlbum_id(jsonObject.getString("album_id"));
obj.setName(jsonObject.getString("name"));
mainCategoryList.add(obj);
Log.e("Verify", obj.getAlbum_id() );
}
} catch (JSONException e) {
throw new RuntimeException(e);
}
Log.e("MyApp", "API call successful" );
}
}
@Override
public void onFailure(Call<YogaTracks> call, Throwable t) {
Log.e("MyApp", "API call failed" + t.getMessage());
}
});
init();
Intent intent=getIntent();
String tit= intent.getStringExtra("title");
tvtitle.setText(tit);
LinearLayoutManager llm = new LinearLayoutManager(this);
adapterMainCategory = new AdapterMusicList(mainCategoryList,MusicListScreen.this);
recMainCategory.setLayoutManager(llm);
recMainCategory.setAdapter(adapterMainCategory);
}
private void init() {
recMainCategory = findViewById(R.id.recMainCategory);
tvtitle = findViewById(R.id.textView1);
}
public void backClick(View view) {
finish();
}
}API接口
package JamendoAPI;
import java.util.List;
import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;
public interface JamendoApiService
{
@GET("https://api.jamendo.com/v3.0/tracks/?client_id=db9569db&format=jsonpretty&tags=yoga")
Call<YogaTracks>getYogaTracks(@Query("db9569db") String clientId,
@Query("jsonpretty") String format,
@Query("yoga") String tags);
}YogaTracks课程
package JamendoAPI;
import java.io.Serializable;
import java.util.List;
public class YogaTracks implements Serializable {
private List<YogaTracks> musics;
private String id;
private String name;
public List<YogaTracks> getMusics() {
return musics;
}
public void setMusics(List<YogaTracks> musics) {
this.musics = musics;
}
private int duration;
private String artist_id;
private String artist_name;
private String artist_idstr;
private String album_name;
private String album_id;
private String license_ccurl;
private int position;
private String releasedate;
private String album_image;
private String audio;
private String audiodownload;
private String prourl;
private String shorturl;
private String shareurl;
private String waveform;
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 int getDuration() {
return duration;
}
public void setDuration(int duration) {
this.duration = duration;
}
public String getArtist_id() {
return artist_id;
}
public void setArtist_id(String artist_id) {
this.artist_id = artist_id;
}
public String getArtist_name() {
return artist_name;
}
public void setArtist_name(String artist_name) {
this.artist_name = artist_name;
}
public String getArtist_idstr() {
return artist_idstr;
}
public void setArtist_idstr(String artist_idstr) {
this.artist_idstr = artist_idstr;
}
public String getAlbum_name() {
return album_name;
}
public void setAlbum_name(String album_name) {
this.album_name = album_name;
}
public String getAlbum_id() {
return album_id;
}
public void setAlbum_id(String album_id) {
this.album_id = album_id;
}
public String getLicense_ccurl() {
return license_ccurl;
}
public void setLicense_ccurl(String license_ccurl) {
this.license_ccurl = license_ccurl;
}
public int getPosition() {
return position;
}
public void setPosition(int position) {
this.position = position;
}
public String getReleasedate() {
return releasedate;
}
public void setReleasedate(String releasedate) {
this.releasedate = releasedate;
}
public String getAlbum_image() {
return album_image;
}
public void setAlbum_image(String album_image) {
this.album_image = album_image;
}
public String getAudio() {
return audio;
}
public void setAudio(String audio) {
this.audio = audio;
}
public String getAudiodownload() {
return audiodownload;
}
public void setAudiodownload(String audiodownload) {
this.audiodownload = audiodownload;
}
public String getProurl() {
return prourl;
}
public void setProurl(String prourl) {
this.prourl = prourl;
}
public String getShorturl() {
return shorturl;
}
public void setShorturl(String shorturl) {
this.shorturl = shorturl;
}
public String getShareurl() {
return shareurl;
}
public void setShareurl(String shareurl) {
this.shareurl = shareurl;
}
public String getWaveform() {
return waveform;
}
public void setWaveform(String waveform) {
this.waveform = waveform;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}我得到了这个错误。
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.minhhoang.yolo_yoga, PID: 24210
java.lang.RuntimeException: org.json.JSONException: Not a primitive array: class retrofit2.Response
at com.minhhoang.yolo_yoga.MusicListScreen$1.onResponse(MusicListScreen.java:86)
at retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1$1.run(DefaultCallAdapterFactory.java:83)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: org.json.JSONException: Not a primitive array: class retrofit2.Response
at org.json.JSONArray.<init>(JSONArray.java:118)
at com.minhhoang.yolo_yoga.MusicListScreen$1.onResponse(MusicListScreen.java:73)
at retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1$1.run(DefaultCallAdapterFactory.java:83)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
1条答案
按热度按时间rdrgkggo1#
MusicListScrenn类-第73行：
你需要访问主体，而不仅仅是“响应”，使用“.body（）”，然后你有另一个问题，YogaTracks不是一个数组，所以你首先需要使用第一个JSONObject解构...
后来你会发现更多的问题，因为你的响应有两个字段（标题，结果）和你的计数，你已经在“结果”，所以你还需要处理，例如创建一个类“YogaTrackResponse”与这两个字段“标题”和“结果”（列表）和改变API接口的调用