java.io.Exception Unexpected End Of Stream on com.android.okhttp

Question

I'm currently working on Android Studio. Just trying to make an app to register account and save data on database using LAMP stack.

The code I was using worked for localhost (I'm using XAMPP), it posted data to the database.

Howevers, when I change the URL to my EC2 machine on AWS, the app showing "java.io.Exception Unexpected End Of Stream on com.android.okhttp" and didn't post data to database. I tested and verify the URL is correct.

What else should I try for this problem ? Any help would be really appreciated !

Here is the app UI: Click to see image

Here is the code:

---

package com.example.androidphp;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private EditText editTextUserName, editTextEmail, editTextPassword;
    private Button buttonRegister;
    private ProgressDialog progressDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editTextEmail = (EditText) findViewById(R.id.editTextEmail);
        editTextUserName = (EditText) findViewById(R.id.editTextUserName);
        editTextPassword = (EditText) findViewById(R.id.editTextPassword);
        buttonRegister = (Button) findViewById(R.id.buttonRegister);

        progressDialog = new ProgressDialog(this);
        buttonRegister.setOnClickListener(this);
    }
    private void registerUser(){
        final String email = editTextEmail.getText().toString().trim();
        final String username = editTextUserName.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();

        progressDialog.setMessage("Registering User....");
        progressDialog.show();

        // class from volley
        StringRequest stringRequest = new StringRequest(Request.Method.POST,
                Constants.URL_REGISTER,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        progressDialog.dismiss();
                        try {
                            JSONObject jsonObject = new JSONObject(response);
                            Toast.makeText(getApplicationContext(), jsonObject.getString("message"),
                                    Toast.LENGTH_LONG).show();
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        progressDialog.hide();
                        Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }){
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String,String> params = new HashMap<>();
                params.put("username", username);
                params.put("email", email);
                params.put("password", password);
                return params;
            }
        };
        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }

    @Override
    public void onClick(View v) {
        if(v == buttonRegister)
            registerUser();
    }
}

Answer 1

I had the same problem to my device with android 10, if your protocol url is http, you must add android:usesCleartextTraffic="true" in manifest.

<application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:usesCleartextTraffic="true"
        android:theme="@style/AppTheme">

</Application>

in android 9 pi [API Level 28] and later you must set a networkSecurityConfig in your Manifest application tag like this:

 <application android:networkSecurityConfig="@xml/network_security_config">

then in your xml folder create your xml file and should be like this to enable all requests without encryptions:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="false">
        <domain includeSubdomains="true">secure.example.com</domain>
    </domain-config>
</network-security-config>

plz see this links for more information: Read 1 -- Read 2