Android Volley Post JSON Data

1) Add this dependency on your build.gradle(Module:app)

  implementation 'com.android.volley:volley:1.1.0'

2) Add internet permission on your Manifest.xml file

  <uses-permission android:name="android.permission.INTERNET"/>

3) MainActivity.XML

  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp"
    tools:context=".MainActivity">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Name"
        android:id="@+id/et_name"
        android:layout_marginTop="10dp"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Job"
        android:id="@+id/et_job"
        android:layout_marginTop="10dp"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btn_submit"
        android:text="Submit"
        android:layout_marginTop="10dp"/>

</LinearLayout>

4) MainActivity.java

 public class MainActivity extends AppCompatActivity {

    private RequestQueue requestQueue;
    private EditText et_name, et_job;
    private Button btn_submit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        et_name = (EditText)findViewById(R.id.et_name);
        et_job = (EditText)findViewById(R.id.et_job);

        btn_submit = (Button) findViewById(R.id.btn_submit);

        btn_submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String data = "{"+
                        "\"name\":" + "\"" + et_name.getText().toString() + "\","+
                        "\"job\":" + "\"" + et_job.getText().toString() + "\""+
                        "}";
                        Submit(data);
            }
        });
    }

    private void Submit(String data)
    {
        final String savedata= data;
        String URL="https://YOUR_API_URL";

        requestQueue = Volley.newRequestQueue(getApplicationContext());
        StringRequest stringRequest = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    JSONObject objres=new JSONObject(response);
                     Toast.makeText(getApplicationContext(),objres.toString(),Toast.LENGTH_LONG).show();

                    
                } catch (JSONException e) {
                    Toast.makeText(getApplicationContext(),"Server Error",Toast.LENGTH_LONG).show();

                }
                //Log.i("VOLLEY", response);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                

                  Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();

                //Log.v("VOLLEY", error.toString());
            }
        }) {
            @Override
            public String getBodyContentType() {
                return "application/json; charset=utf-8";
            }

            @Override
            public byte[] getBody() throws AuthFailureError {
                try {
                    return savedata == null ? null : savedata.getBytes("utf-8");
                } catch (UnsupportedEncodingException uee) {
                    //Log.v("Unsupported Encoding while trying to get the bytes", data);
                    return null;
                }
            }

        };
        requestQueue.add(stringRequest);
    }
}