Android常见控件— — —EditText

<?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;        }    }}