Parse a json array inside another json object in android with free source code download

parse any json of the form {"key1":"value1","key2":[{},{}...],..}

free source code zip download

We will be using retrofit,gson for parsing, so go to your app level build.gradle and add the following as dependencies

implementation 'com.squareup.retrofit2:retrofit:2.0.0-beta4'

implementation 'com.squareup.retrofit2:converter-gson:2.3.0'

please add the latest dependency versions for retrofit, converter-gson

Hi, in this tutorial, we will parse the below json. Check this json here >> https://navneet7k.github.io/sample_object_array.json

Here you can see that the cars_array is wrapped inside another json object, so we will need two model/pojo classes

1) Automatic model class/pojo class generation using http://www.jsonschema2pojo.org/

You can make use of jsonschema2pojo to covert json to java object online. This is a really effective tool which even supports various annotation types like jackson, gson, moshi etc.

• So, first of all, go to http://www.jsonschema2pojo.org/
• Paste the json https://navneet7k.github.io/sample_object_array.json in the box provided 

Specify Target language as Java, Source Type as JSON and annotation style as Gson

• Now click preview and copy the generated java files

Now copy the contents of the class and add it in android studio project

Now rename the generated classes like shown below and add it inside your android studio project

SampleResponse.java

public class SampleResponse {
    @SerializedName("id")
    @Expose
    private String id;
    @SerializedName("type")
    @Expose
    private String type;
    @SerializedName("cars_array")
    @Expose
    private List<CarsArray> carsArray = null;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public List<CarsArray> getCarsArray() {
        return carsArray;
    }

    public void setCarsArray(List<CarsArray> carsArray) {
        this.carsArray = carsArray;
    }

}

CarsArray.java

public class CarsArray {
    @SerializedName("id")
    @Expose
    private String id;
    @SerializedName("name")
    @Expose
    private String name;
    @SerializedName("desc")
    @Expose
    private String desc;

    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 getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }
}

MainActivity.java

private void parseJson() {
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://navneet7k.github.io/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();

        RequestInterface request = retrofit.create(RequestInterface.class);
        Call<SampleResponse> call1=request.getJson();
        call1.enqueue(new Callback<SampleResponse>() {
            @Override
            public void onResponse(Call<SampleResponse> call, Response<SampleResponse> response) {
                Toast.makeText(MainActivity.this,"Success! response for first item >> \n car :" +response.body().getCarsArray().get(0).getName()+"\ndesc :"+response.body().getCarsArray().get(0).getDesc(),Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailure(Call<SampleResponse> call, Throwable t) {
                Toast.makeText(MainActivity.this,"Failure",Toast.LENGTH_SHORT).show();
            }

        });
    }

RequestInterface.java

interface RequestInterface {
    @GET("sample_object_array.json")
    Call<SampleResponse> getJson();
}

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