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LoginActivity.java
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LoginActivity.java
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package com.example.musicappcsia;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
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 java.io.IOException;
import java.io.OutputStreamWriter;
public class LoginActivity extends AppCompatActivity {
private EditText editTextEmail;
private EditText editTextPassword;
//writing the data to a file
private void writeToFile(String data, Context context) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("user_id.txt", Context.MODE_PRIVATE));
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
Log.e("MyException", "File write failed: " + e.toString());
}
}
private void check_email_and_password(String email, String password) {
RequestQueue requestQueue = Volley.newRequestQueue(this);
StringRequest stringRequest = new StringRequest("http://47.100.220.252:666/auth/?email="+email+"&password="+password,
new Response.Listener<String>() {
@Override
public void onResponse(String str) {
Log.d("http_get_return", str);
String strs[] = str.split("___");
if(strs.length!=2)
{
return;
}
writeToFile(strs[1],LoginActivity.this);
if(strs[0].equals("teacher")) {
Intent myIntent = new Intent(LoginActivity.this, TeacherHomepageActivity.class);
LoginActivity.this.startActivity(myIntent);
}
else if(strs[0].equals("student")) {
Intent myIntent = new Intent(LoginActivity.this, HomepageActivity.class);
LoginActivity.this.startActivity(myIntent);
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
//issue with connection to wifi
//add a message box that prompts user to check wifi
Log.d("MainActivity", volleyError.getMessage(), volleyError);
}
}
);
requestQueue.add(stringRequest);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Button btn_login = (Button)findViewById(R.id.button_login);
btn_login.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
editTextEmail = (EditText) findViewById(R.id.editTextLoginEmail);
editTextPassword = (EditText) findViewById(R.id.editTextLoginPassword);
//check input of email and password (cannot submit empty, check email length etc)
String email = editTextEmail.getText().toString();
String password = editTextPassword.getText().toString();
Log.d("Password: ", password);
Log.d("Email: ", email);
check_email_and_password(email,password);
//Intent myIntent = new Intent(LoginActivity.this, HomepageActivity.class);
//LoginActivity.this.startActivity(myIntent);
}
});
}
}