<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/edit_test"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:hint="请输姓名"
        android:maxLines="1"/>

    <EditText
        android:id="@+id/edit_test2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:hint="学号"
        android:maxLines="1"/>

</LinearLayout>

---

应用

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/edit_test1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:hint="请输姓名"
        android:maxLines="1"/>

    <EditText
        android:id="@+id/edit_test2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:hint="请输入学号"
        android:maxLines="1"/>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="确认"
        android:layout_gravity="center"
        />

</LinearLayout>

package com.example.uiwidgettest2;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.*;

public class edittextActivity extends Activity implements View.OnClickListener{

    private EditText et1;
    private EditText et2;
    private Button btn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edittext);
        btn = (Button)findViewById(R.id.button1);
        et1 = (EditText)findViewById(R.id.edit_test1);
        et2 = (EditText)findViewById(R.id.edit_test2);
        btn.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.button1:
                String username = et1.getText().toString();
                String id = et2.getText().toString();
                Toast.makeText(edittextActivity.this,username+id,Toast.LENGTH_SHORT).show();
                break;
            default:
                break;
        }
    }
}