Retrofit is network library which uses http request to get data from the server . I am going to give you a example by using complex json and post method to load data .
Manifest file
Library pojo.java
Error pojo.java
Response pojo.java
Manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.vishalsingh.retrofit">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:networkSecurityConfig="@xml/actions"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity" />
<activity android:name=".Main2Activity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.actions"
android:resource="@xml/actions" />
</application>
</manifest>
Library pojo.java
package com.vishalsingh.retrofit.Pojo;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Library {
@SerializedName("Status")
@Expose private Boolean status;
@SerializedName("Error")
@Expose private Error error;
@SerializedName("Response")
@Expose
private List<Response> response = null; public Boolean getStatus() { return status; } public void setStatus(Boolean status) { this.status = status; } public Error getError() { return error; } public void setError(Error error) { this.error = error; } public List<Response> getResponse() { return response; } public void setResponse(List<Response> response) { this.response = response; } }
Error pojo.java
package com.vishalsingh.retrofit.Pojo;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Error {
@SerializedName("Code")
@Expose private Integer code;
@SerializedName("Message")
@Expose private String message;
public Integer getCode() {
return code; }
public void setCode(Integer code) {
this.code = code; }
public String getMessage() {
return message; }
public void setMessage(String message) {
this.message = message; }
}
Response pojo.java
package com.vishalsingh.retrofit.Pojo;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName; public class Response { @SerializedName("Name") @Expose private String name; @SerializedName("Image") @Expose private String image; @SerializedName("Gender") @Expose private String gender; @SerializedName("DateOfBirth") @Expose private String dateOfBirth; @SerializedName("Address") @Expose private String address; @SerializedName("Country") @Expose private String country; @SerializedName("PinCode") @Expose private String pinCode; @SerializedName("EmailId") @Expose private String emailId; @SerializedName("MobileNo") @Expose private String mobileNo; @SerializedName("isPartner") @Expose private String isPartner; @SerializedName("City") @Expose private String city; @SerializedName("State") @Expose private String state; @SerializedName("Booth") @Expose private String booth; @SerializedName("Constituency") @Expose private String constituency; @SerializedName("Assembly") @Expose private String assembly; @SerializedName("Citizenship") @Expose private Object citizenship; 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; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public String getDateOfBirth() { return dateOfBirth; } public void setDateOfBirth(String dateOfBirth) { this.dateOfBirth = dateOfBirth; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } public String getPinCode() { return pinCode; } public void setPinCode(String pinCode) { this.pinCode = pinCode; } public String getEmailId() { return emailId; } public void setEmailId(String emailId) { this.emailId = emailId; } public String getMobileNo() { return mobileNo; } public void setMobileNo(String mobileNo) { this.mobileNo = mobileNo; } public String getIsPartner() { return isPartner; } public void setIsPartner(String isPartner) { this.isPartner = isPartner; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getState() { return state; } public void setState(String state) { this.state = state; } public String getBooth() { return booth; } public void setBooth(String booth) { this.booth = booth; } public String getConstituency() { return constituency; } public void setConstituency(String constituency) { this.constituency = constituency; } public String getAssembly() { return assembly; } public void setAssembly(String assembly) { this.assembly = assembly; } public Object getCitizenship() { return citizenship; } public void setCitizenship(Object citizenship) { this.citizenship = citizenship; } }
Apiclient.java
package com.vishalsingh.retrofit; import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory; public class APIClient { private static Retrofit retrofit = null; static Retrofit getClient() { HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build(); retrofit = new Retrofit.Builder() .baseUrl("Your base ur") .addConverterFactory(GsonConverterFactory.create()) .client(client) .build(); return retrofit; } }
ApiInterface.java
note: name it as new api
package com.vishalsingh.retrofit; import com.vishalsingh.retrofit.Pojo.Library; import java.util.List;
import java.util.Map; import retrofit2.Call; import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.POST; interface NewApi { @FormUrlEncoded
@POST(" Your post method ?") Call<Library> doCreateUserWithField(@Field("UserId") String UserId);}
MainActivity.javapackage com.vishalsingh.retrofit;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;import android.widget.TextView;
import android.widget.Toast;
import com.vishalsingh.retrofit.Pojo.Library;
import java.util.HashMap;import java.util.List;
import java.util.Map;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class Main2Activity extends AppCompatActivity {
TextView text1;
NewApi apiInterface;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
text1 = (TextView) findViewById(R.id.text1);
apiInterface = APIClient.getClient().create(NewApi.class);
Call<Library> call = apiInterface.doCreateUserWithField("your parameter");
call.enqueue(new Callback<Library>() {
@Override
public void onResponse(Call<Library> call, Response<Library> response) {
Library userlist = response.body();
List<com.vishalsingh.retrofit.Pojo.Response> newrepo = userlist.getResponse(); String name="", address="", email=""; for (int i = 0; i <newrepo.size(); i++) {
name = newrepo.get(i).getName();
address = newrepo.get(i).getAddress();
email = newrepo.get(i).getEmailId();
}
text1.setText(name + "\n" + address + "\n" + email); }
@Override
public void onFailure(Call<Library> call, Throwable t) {
Toast.makeText(Main2Activity.this, "cannot load data", Toast.LENGTH_SHORT).show(); }
}); }
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Main2Activity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/text1"/>
</android.support.constraint.ConstraintLayout>
Sample json{"Status":true,"Error":{"Code":0,"Message":""},"Response":[{"Name":"Shubham Shrivastava","Image":"http://103.115.194.111:906/Readers/uploads/Screenshot_20190424-202039.jpg","Gender":"Mr.","DateOfBirth":"26 Dec 2018","Address":"Noida","Country":"INDIA","PinCode":"485001","EmailId":"shri.shubham86@gmail.com","MobileNo":"9074762379","isPartner":"No","City":"","State":"Madhya Pradesh","Booth":"Other","Constituency":"Satna","Assembly":"Satna","Citizenship":null}]}NoteIn case of problem in pi create network configuration xml fileand write this code<?xml version ="1.0" encoding ="utf-8"?>
<network-security-config>
<domain-config cleartextTrafficPermitted="true">
<domain includeSubdomains="true">Your domain or IP address</domain>
</domain-config>
</network-security-config>
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