目标： 设计一个用户注册案例。在主界面中对输入的手机号、密码、性别、爱好和城市后，可以在界面二中进行显示。

提示：

1. 页面布局的元素用到TextView、EditText、Button、RadioButton、CheckBox、Spinner；
2. 通过intent实现主界面跳转到界面二
3. 涉及传递多个的数据时，使用Bundle对象作为容器，通过调用Bundle的putString先将数据存储到Bundle中，然后调用Intent的putExtras()方法将Bundle存入Intent中，然后获得Intent后， 调用getExtras()获得Bundle容器，然后调用其getString获取对应的数据！

Bundle bundle=new Bundle();
bundle.putString("phone",phone_str);
bundle.putString("paswd",paswd_str);
bundle.putString("sex",sex_str);
bundle.putString("hobby",hobby_str);
bundle.putString("city",city_str);
//为意图追加额外的数据，意图原来已经具有的数据不会丢失，但key同名的数据会被替换
intent.putExtras(bundle);

//取得启动该Activity的Intent对象
 Intent intent=this.getIntent();
 Bundle bundle=intent.getExtras();
  /*取出Intent中附加的数据*/
 String phone=bundle.getString("phone");
 String paswd=bundle.getString("paswd");
 String sex=bundle.getString("sex");
 String hobby=bundle.getString("hobby");
 String city=bundle.getString("city");

界面显示如下：


实现如下：
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/img03"
    tools:context="com.example.jinjin.applicationtest4.MainActivity">

    <!--手机号-->
    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        tools:layout_editor_absoluteY="0dp"
        android:orientation="horizontal"
        tools:layout_editor_absoluteX="8dp">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="40dp"
            android:textSize="18sp"
            android:textColor="@android:color/background_dark"
            android:text="手机号："/>
        <EditText
            android:id="@+id/phone"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:inputType="phone"
            android:hint="请输入手机号"/>
    </LinearLayout>
    <!--密码-->
    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="40dp"
            android:textSize="18sp"
            android:textColor="@android:color/background_dark"
            android:text="密    码："/>
        <EditText
            android:id="@+id/paswd"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:inputType="numberPassword"
            android:hint="请输入密码"/>
    </LinearLayout>
    <!--性别选择-->
    <RadioGroup
        android:id="@+id/sex"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:orientation="horizontal">
        <RadioButton
            android:id="@+id/nan"
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="男"/>
        <RadioButton
            android:id="@+id/nv"
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:text="女"/>
    </RadioGroup>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <CheckBox
            android:id="@+id/read_book"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="读书" />

        <CheckBox
            android:id="@+id/play_ball"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="打球" />
        <CheckBox
            android:id="@+id/music"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="听音乐" />
    </LinearLayout>
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/register"
        android:layout_width="fill_parent"
        android:background="#3F51B5"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        android:text="注 册"
        android:layout_height="40dp" />
</LinearLayout>

activity_second.xml

<?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:background="@drawable/img03"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/show_content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="17sp"
        android:layout_marginLeft="50dp"
        android:textColor="@android:color/black"
        android:text="TextView" />
</LinearLayout>

MainActivity.java

package com.example.jinjin.applicationtest4;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;

public class MainActivity extends AppCompatActivity implements View.OnClickListener,RadioGroup.OnCheckedChangeListener{
    //定义字符串用来保存各个信息
    private String phone_str="";
    private String paswd_str="";
    private String sex_str="男";
    private String hobby_str="1";
    private String city_str="";
    //组件定义
    EditText phone_edit,paswd_edit;
    RadioGroup sex_group;
    RadioButton nan_but,nv_but;
    CheckBox play,read,music;
    Button register;
    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化组件
        phone_edit = (EditText) findViewById(R.id.phone);
        paswd_edit=(EditText)findViewById(R.id.paswd);
        sex_group=(RadioGroup)findViewById(R.id.sex);
        //添加监听事件
        nan_but=(RadioButton)findViewById(R.id.nan);
        sex_group.setOnCheckedChangeListener(this);
        read=(CheckBox)findViewById(R.id.read_book);
        play=(CheckBox)findViewById(R.id.play_ball);
        music=(CheckBox)findViewById(R.id.music);
        register=(Button)findViewById(R.id.register);
        //添加监听事件
        register.setOnClickListener(this);
        spinner=(Spinner)findViewById(R.id.spinner);
         // 创建ArrayAdapter对象
        final String[] city=new String[]{"南宁","桂林","百色","柳州","玉林","河池"};
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,city);
        spinner.setAdapter(adapter);
        //城市下拉单列表添加监听事件
        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){

            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                city_str=city[i];
            }
            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {
            //未选中状态
            }
        });
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.register:
                //获取手机号和密码
                phone_str=phone_edit.getText().toString();
                paswd_str=paswd_edit.getText().toString();
                //获取兴趣爱好即复选框的值
                hobby_str="";//清除上一次已经选中的选项
                if (read.isChecked()){
                    hobby_str+=read.getText().toString();
                }if(play.isChecked()){
                hobby_str+=play.getText().toString();
            }if(music.isChecked()){
                hobby_str+=music.getText().toString();
            }
                Intent intent=new Intent(this,SecondActivity.class);
                Bundle bundle=new Bundle();
                bundle.putString("phone",phone_str);
                bundle.putString("paswd",paswd_str);
                bundle.putString("sex",sex_str);
                bundle.putString("hobby",hobby_str);
                bundle.putString("city",city_str);
                intent.putExtras(bundle);
                startActivity(intent);
                break;
        }
    }

    @Override
    public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {
        //根据用户选择来改变sex_str的值
        sex_str=i==R.id.nan?"男性":"女性";
    }
}

SecondActivity.java

package com.example.jinjin.applicationtest4;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

/**
 * Created by jinjin on 2020/5/23.
 */

public class SecondActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        Intent intent=this.getIntent();
        Bundle bundle=intent.getExtras();
        String phone=bundle.getString("phone");
        String paswd=bundle.getString("paswd");
        String sex=bundle.getString("sex");
        String hobby=bundle.getString("hobby");
        String city=bundle.getString("city");
        TextView show_text=(TextView)findViewById(R.id.show_content);
        show_text.setText("手机号为："+phone+"\n"+"密码为："+paswd+"\n"+"性别是："+sex+"\n"+"爱好是："+hobby+"\n"+"城市是："+city);
    }
}

巩固监听事件:如果要对register和spinne的监听事件改造方法，如何重新实现监听？

• register可使用内部类,并重写onClick()方法 。
• spinner可使用实现接口的监听事件。

实现如下

package com.example.jinjin.applicationtest4;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;

public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener,AdapterView.OnItemSelectedListener{
    //定义字符串用来保存各个信息
    private String phone_str = "";
    private String paswd_str = "";
    private String sex_str = "男";
    private String hobby_str = "1";
    private String city_str = "";
    //组件定义
    EditText phone_edit, paswd_edit;
    RadioGroup sex_group;
    RadioButton nan_but, nv_but;
    CheckBox play, read, music;
    Button register;
    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化组件
        phone_edit = (EditText) findViewById(R.id.phone);
        paswd_edit = (EditText) findViewById(R.id.paswd);
        sex_group = (RadioGroup) findViewById(R.id.sex);
        //添加监听事件
        nan_but = (RadioButton) findViewById(R.id.nan);
        sex_group.setOnCheckedChangeListener(this);
        read = (CheckBox) findViewById(R.id.read_book);
        play = (CheckBox) findViewById(R.id.play_ball);
        music = (CheckBox) findViewById(R.id.music);
        register = (Button) findViewById(R.id.register);
        //添加监听事件
//        register.setOnClickListener(this);
        spinner = (Spinner) findViewById(R.id.spinner);
         //直接new一个内部类对象作为参数  
        register.setOnClickListener(new mclick());


//        final String[] city=new String[]{"南宁","桂林","百色","柳州","玉林","河池"};
//        ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,city);
//        spinner.setAdapter(adapter);
//        //城市下拉单列表添加监听事件
//        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){
//            @Override
//            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
//                city_str=city[i];
//            }
//            @Override
//            public void onNothingSelected(AdapterView<?> adapterView) {
//            }
//        });

        //Spinner加载监听事件
        spinner.setOnItemSelectedListener(this);
    }

    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
        city_str=MainActivity.this.getResources().getStringArray(R.array.city)[i];
    }

    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {

    }

 //定义一个内部类,实现View.OnClickListener接口,并重写onClick()方法 
    class mclick implements View.OnClickListener {

        @Override
        public void onClick(View view) {

            switch (view.getId()) {
                case R.id.register:
                    //获取手机号和密码
                    phone_str = phone_edit.getText().toString();
                    paswd_str = paswd_edit.getText().toString();
                    //获取兴趣爱好即复选框的值
                    hobby_str = "";//清除上一次已经选中的选项
                    if (read.isChecked()) {
                        hobby_str += read.getText().toString();
                    }
                    if (play.isChecked()) {
                        hobby_str += play.getText().toString();
                    }
                    if (music.isChecked()) {
                        hobby_str += music.getText().toString();
                    }
                    Intent intent = new Intent(MainActivity.this, SecondActivity.class);
                    Bundle bundle = new Bundle();
                    bundle.putString("phone", phone_str);
                    bundle.putString("paswd", paswd_str);
                    bundle.putString("sex", sex_str);
                    bundle.putString("hobby", hobby_str);
                    bundle.putString("city", city_str);
                    intent.putExtras(bundle);
                    startActivity(intent);
                    break;
            }
        }
    }

    @Override
    public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {
        //根据用户选择来改变sex_str的值
        sex_str = i == R.id.nan ? "男性" : "女性";
    }
}

在res/values下编写一个：array.xml文件，内容如下：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="city">
        <item>南宁</item>
        <item>桂林</item>
        <item>柳州</item>
        <item>百色</item>
        <item>河池</item>
        <item>玉林</item>
    </string-array>
</resources>