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android:orientation="vertical">

<EditText
android:id="@+id/login_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint=" 아이디" />

<EditText
android:id="@+id/login_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint=" 비밀번호" />
</LinearLayout>

<Button
android:id="@+id/btn_login"
android:layout_width="80dp"
android:layout_height="match_parent"
android:onClick="onClick_final_login"
android:text=" 로그인" />
</LinearLayout>
</LinearLayout>

[LoginActivity,java]
package kr.icehs.intec.mdp;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class LoginActivity extends AppCompatActivity {

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