Android Retrofit解析

Question

我只是跟着例子: https://www.learn2crack.com/2016/02/recyclerview-json-parsing.html它工作得很好..我想解析

[  
 {
  "song_name": "Hero",
  "song_id": "1990",
  "artist_name": "Enrique"
 },{
  "song_name": "African Queen",
  "song_id": "2004",
  "artist_name": "Tuface"
 }, {
  "song_name": "Ifunanyi",
  "song_id": "2012",
  "artist_name": "PSquare"
  }
]

这是我的代码变得空白..我是 android 的新手给我一些我想要的其他想法..任何人都请指导我

公共(public)类 MainActivity 扩展 AppCompatActivity {

private RecyclerView recyclerView;
private ArrayList<ItemObject> data;
private MyAdapter adapter;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initViews();
}
private void initViews(){
    recyclerView = (RecyclerView)findViewById(R.id.card_recycler_view);
    recyclerView.setHasFixedSize(true);
    RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(layoutManager);
    loadJSON();
}
private void loadJSON(){
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("http://toscanyacademy.com")
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    RequestInterface request = retrofit.create(RequestInterface.class);
    Call<JSONResponse> call = request.getJSON();
    call.enqueue(new Callback<JSONResponse>() {
        @Override
        public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
            JSONResponse jsonResponse = response.body();
            data = new ArrayList<>(Arrays.asList(jsonResponse.getAndroid()));
            adapter = new MyAdapter(data);
            recyclerView.setAdapter(adapter);
        }

        @Override
        public void onFailure(Call<JSONResponse> call, Throwable t) {
            Log.d("Error",t.getMessage());
        }
    });
}

我的请求接口(interface):

public interface RequestInterface {
    @GET("blog/mp.php")
    Call<JSONResponse> getJSON();
}

JSON 响应:

public class JSONResponse {
    private ItemObject[] obj;

    public ItemObject[] getAndroid() {
        return obj;
    }
}

public class ItemObject {

    public String getSong_name() {
        return song_name;
    }

    public String getSong_id() {
        return song_id;
    }

    public String getArtist_name() {
        return artist_name;
    }

    private String song_name,song_id,artist_name;
}

这是我的适配器:

公共(public)类 MyAdapter 扩展 RecyclerView.Adapter {

private ArrayList<ItemObject> users;
public MyAdapter(ArrayList<ItemObject> first) {
    this.users = first;
}
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(MyAdapter.ViewHolder viewHolder, int i) {

    viewHolder.song_title.setText(users.get(i).getsong_name());
    viewHolder.song_id.setText(users.get(i).getsong_id());
    viewHolder.song_author.setText(users.get(i).getartist_name());

}

@Override
public int getItemCount() {
    return users.size();
}

public class ViewHolder extends RecyclerView.ViewHolder{
    public TextView song_title, song_id, song_author;

    public ViewHolder(View view) {
        super(view);
        song_title = (TextView) view.findViewById(R.id.song_name);
        song_id = (TextView) view.findViewById(R.id.song_id);
        song_author=(TextView) view.findViewById(R.id.artist_name);
    }
}

行布局:

<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
card_view:cardCornerRadius="5dp">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:orientation="vertical">
<TextView
    android:id="@+id/song_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Text"
    android:textColor="#000"
    android:layout_marginTop="20dp" />
<TextView
    android:id="@+id/song_id"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Text"
    android:textColor="#000"
    />
    <TextView
        android:id="@+id/artist_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:textColor="#000" />

Answer 1

创建您的 POJO 类:例子.java

@Generated("org.jsonschema2pojo")
public class Example {

    @SerializedName("song_name")
    @Expose
    private String songName;

    @SerializedName("song_id")
    @Expose
    private String songId;

    @SerializedName("artist_name")
    @Expose
    private String artistName;

    public String getSongName() {
        return songName;
    }

    public void setSongName(String songName) {
        this.songName = songName;
    }

    public String getSongId() {
        return songId;
    }

    public void setSongId(String songId) {
        this.songId = songId;
    }

    public String getArtistName() {
        return artistName;
    }

    public void setArtistName(String artistName) {
        this.artistName = artistName;
    }
}

在您的界面中:

public interface RequestInterface {

    @GET("blog/mp.php")
    Call<List<Example>> getJSON();
}

在你的 Activity 中:

ArrayList<Example> arrayList = new ArrayList<>();


//Inside loadJSON()

Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("http://toscanyacademy.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    RequestInterface request = retrofit.create(RequestInterface.class);

    Call<List<Example>> listCall = request.getJSON();

                listCall.enqueue(new Callback<List<Example>>() {
                    @Override
                    public void onResponse(Call<List<Example>> call, Response<List<Example>> response) {
                        for (int i = 0; i < response.body().size(); i++) {
                            Example example = new Example();
                            example.setArtistName(response.body().get(i).getArtistName());
                            example.setSongId(response.body().get(i).getSongId());
                            example.setSongName(response.body().get(i).getSongName());
                            arrayList.add(example);
                        }
                        adapter = new MyAdapter(arrayList);
                        recyclerView.setAdapter(adapter);
                    }

                    @Override
                    public void onFailure(Call<List<Example>> call, Throwable t) {
                        Log.d("Error",t.getMessage());
                    }
                });