设计用户注册页面（常用组件的应用）

阶段一：进行界面布局（如下图：）

                              

具体代码如下：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:background="@drawable/bg">    <LinearLayout         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="vertical">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:padding="@dimen/padding_medium"        android:text="@string/inputname"        tools:context=".MainActivity" />    <EditText        android:id="@+id/name"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:inputType="text" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/inputsex" />    <RadioGroup        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/inputsex"        android:orientation="horizontal"        android:id="@+id/sex" >        <RadioButton             android:text="男"            android:id="@+id/boy"            android:checked="true"/>        <RadioButton             android:text="女"            android:id="@+id/girl"/>    </RadioGroup>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/inputbirth" />    <DatePicker         android:id="@+id/birth"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/inputhobby" />    <CheckBox         android:id="@+id/film"        android:text="看电影"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        />    <CheckBox         android:id="@+id/basketball"        android:text="打篮球"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <CheckBox         android:id="@+id/game"        android:text="游戏"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <CheckBox         android:id="@+id/music"        android:text="听音乐"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <Button         android:id="@+id/click"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="提交"/>    </LinearLayout></ScrollView>

阶段二：编写Activity，查找组件并进行事件处理. 具体代码如下：

package com.lks.register;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.DatePicker;import android.widget.EditText;import android.widget.RadioButton;import android.widget.Toast;public class MainActivity extends Activity {    //定义组件private EditText nameinput;private RadioButton boy;private RadioButton girl;private DatePicker birth;private CheckBox film;private CheckBox basketball;private CheckBox game;private CheckBox music;private Button clickButton;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //查找组件        nameinput=(EditText) findViewById(R.id.name);        boy=(RadioButton) findViewById(R.id.boy);        girl=(RadioButton) findViewById(R.id.girl);        birth=(DatePicker) findViewById(R.id.birth);        film=(CheckBox) findViewById(R.id.film);        basketball=(CheckBox) findViewById(R.id.basketball);        game=(CheckBox) findViewById(R.id.game);        music=(CheckBox) findViewById(R.id.music);        clickButton=(Button) findViewById(R.id.click);                clickButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {String name=nameinput.getText().toString();String sex="";if(boy.isChecked()){sex="男";}if(girl.isChecked()){sex="女";}String date=birth.getYear()+"年"+birth.getMonth()+"月"+birth.getDayOfMonth()+"日";String hobby="";if(film.isChecked()){hobby=hobby+" "+film.getText();}if(basketball.isChecked()){hobby=hobby+" "+basketball.getText();}if(game.isChecked()){hobby=hobby+" "+game.getText();}if(music.isChecked()){hobby=hobby+" "+music.getText();}Toast.makeText(MainActivity.this, "注册成功！\n您的姓名："+name+"\n您的性别是："+sex+"\n您的生日是："+date+"\n您的爱好："+hobby, Toast.LENGTH_LONG).show();}});                    }

运行显示：