案例分析：
一、资源
- 图片资源:各种菜品图片(后缀jpg或png)，放置到res/drawable文件夹下
二、XML布局文件
将布局分成三部分
- a:Title—>"选餐Start！"<—TextView
- b:寻找由姓名(TextView)开始至寻找(Button)
- 垂直方向的线性布局*weight=1
- 每一行添加不同的控件：TextView...
- 最后一行添加Button
- *需要为每一个在Java代码中使用的的控件添加id属性
- c:显示—>由图片(ImageView)开始至显示(ToggleButton)
- 垂直方向的线性布局，*weight=1;
- 第一行ImageView
- 第二行ToggleButton
三、java代码
- a:initView();初始化控件
- b:initData();初始化数据
- c:setLisstener()；为控件添加监听器
- 1、寻找按钮
- 1)元素数据通过List<object>保存(创建一个实体类用于存放菜品)
- 2)筛选出数据通过List<object>保存
- if(预算之下){
- if(满足第三个CheckBox状态)
- {将1)负荷条件的数据添加到2中)中
- 在ImageView中显示图片}
- }
- 2、SHOW/NEXT(显示信息/下一个)
- 1)SHOW
- 显示图片信息(List)
- 2)NEXT如果当前List还有数据便显示下一个图片，如果没有显示回到第一图片
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="选餐Start"
android:textColor="@color/blueviolet"
android:textSize="25sp"
android:textStyle="bold|italic"
android:typeface="monospace"
android:background="@color/yellow"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight="1"
android:background="@color/aliceblue">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="姓名" />
<EditText
android:id="@+id/et"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入姓名" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="性别" />
<RadioGroup
android:id="@+id/rg"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<RadioButton
android:id="@+id/rb_male"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="男" />
<RadioButton
android:id="@+id/rb_female"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="喜好" />
<CheckBox
android:id="@+id/cb_hot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="辣" />
<CheckBox
android:id="@+id/cb_fish"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="海鲜" />
<CheckBox
android:id="@+id/cb_sour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="酸" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="预算" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="right"
android:text="0元" />
<SeekBar
android:id="@+id/sb"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3"
android:max="100" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="100元" />
</LinearLayout>
<Button
android:id="@+id/bt_find"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@color/blueviolet"
android:text="寻找菜品" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:layout_weight="1"
android:background="@color/aqua">
<ImageView
android:id="@+id/iv_pic"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:src="@drawable/ic_launcher"/>
<ToggleButton
android:id="@+id/tb_click"
android:layout_width="match_parent"
android:layout_height="0dp"
android:textOn="下一个"
android:textOff="显示信息"
android:layout_weight="1"
android:background="@color/bisque"
android:layout_margin="5dp"
/>
</LinearLayout>
</LinearLayout>Food.java//食物的封装类
package com.example.base_tsetdemo;
public class Food {
public Food(String name,int price, int pic, boolean hot, boolean fish, boolean sour
) {
super();
this.name = name;
this.hot = hot;
this.fish = fish;
this.sour = sour;
this.price = price;
this.pic = pic;
}
private String name;
private boolean hot;
private boolean fish;
private boolean sour;
private int price;
private int pic;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isHot() {
return hot;
}
public void setHot(boolean hot) {
this.hot = hot;
}
public boolean isFish() {
return fish;
}
public void setFish(boolean fish) {
this.fish = fish;
}
public boolean isSour() {
return sour;
}
public void setSour(boolean sour) {
this.sour = sour;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public int getPic() {
return pic;
}
public void setPic(int pic) {
this.pic = pic;
}
public String toString(){
return "菜名:"+this.getName()+"-"+"价格:"+this.getPrice()+"-"+"海鲜"+isFish()+"-"+"辣"+isHot()+"-"+"酸"+isSour();
}
}
Person.java个人信息的封装类
package com.example.base_tsetdemo;
public class Person {
private String name;
private String sex;
Food food;
public Food getFood() {
return food;
}
public void setFood(Food food) {
this.food = food;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String toString(){
return "姓名:"+this.getName()+"-"+"性别:"+this.getSex()+"-"+"菜:"+this.getFood();
}
}MainActivity.java
package com.example.base_tsetdemo;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;
import android.widget.ToggleButton;
/*步骤
* 1、初始化控件
* 2、初始化数据
* 3、为控件添加监听器
*
*/
public class MainActivity extends ActionBarActivity {
private EditText name;
private RadioGroup sex;
private CheckBox hot, fish, sour;
private Button find;
private SeekBar seekbar;
private ImageView iv_pic;
private ToggleButton togglebutton;
private List<Food> lists_food;// 初始化的List
private List<Food> lists_get;// 查找的list
private Person person;
private RadioGroupListener radiogrouplistener;
private CheckBoxListener checkboxlistener;
private SeekBarListener seekbarlistener;
private ButtonListener buttonlistener;
private boolean isFish, isSour, isHot;
private int price = 30;
private int i = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();// 初始化控件
initData();// 初始化数据
// 为添加监听器
setListener();
}
private void setListener() {
radiogrouplistener = new RadioGroupListener();
// 为当前单选按钮添加监听器
sex.setOnCheckedChangeListener(radiogrouplistener);
// 为checkbox添加监听器
checkboxlistener = new CheckBoxListener();
fish.setOnCheckedChangeListener(checkboxlistener);
sour.setOnCheckedChangeListener(checkboxlistener);
hot.setOnCheckedChangeListener(checkboxlistener);
// 为seekbar添加监听器
seekbarlistener = new SeekBarListener();
seekbar.setOnSeekBarChangeListener(seekbarlistener);
// 为button寻找按键添加监听器
buttonlistener = new ButtonListener();
find.setOnClickListener(buttonlistener);
togglebutton.setOnClickListener(buttonlistener);
}
private void initData() {// 初始化数据
person = new Person();
lists_food = new ArrayList<Food>();
lists_get = new ArrayList<Food>();
lists_food.add(new Food("麻辣香锅", 55, R.drawable.malaxiangguo, true,
false, false));
lists_food.add(new Food("水煮鱼", 48, R.drawable.shuizhuyu, true, true,
false));
lists_food.add(new Food("麻辣火锅", 80, R.drawable.malahuoguo, true, true,
false));
lists_food.add(new Food("清蒸鲈鱼", 68, R.drawable.qingzhengluyu, false,
true, false));
lists_food.add(new Food("桂林米粉", 15, R.drawable.guilin, false, false,
false));
lists_food.add(new Food("上汤娃娃菜", 28, R.drawable.wawacai, false, false,
false));
lists_food.add(new Food("红烧肉", 60, R.drawable.hongshaorou, false,
false, false));
lists_food.add(new Food("木须肉", 40, R.drawable.muxurou, false, false,
false));
lists_food.add(new Food("酸菜牛肉面", 35, R.drawable.suncainiuroumian,
false, false, true));
lists_food.add(new Food("西芹炒百合", 38, R.drawable.xiqin, false, false,
false));
lists_food.add(new Food("酸辣汤", 40, R.drawable.suanlatang, true, false,
true));
}
private void initView() {
name = (EditText) findViewById(R.id.et);
sex = (RadioGroup) findViewById(R.id.rg);
hot = (CheckBox) findViewById(R.id.cb_hot);
fish = (CheckBox) findViewById(R.id.cb_fish);
sour = (CheckBox) findViewById(R.id.cb_sour);
seekbar = (SeekBar) findViewById(R.id.sb);
iv_pic = (ImageView) findViewById(R.id.iv_pic);
seekbar.setProgress(30);// 进度默认值
find = (Button) findViewById(R.id.bt_find);
togglebutton = (ToggleButton) findViewById(R.id.tb_click);
name.addTextChangedListener(new EditTextListener());
}
// 输入姓名的监听
class EditTextListener implements TextWatcher {
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
Log.i("name", arg0.toString());
person.setName(arg0.toString());
}
}
class RadioGroupListener implements OnCheckedChangeListener {
@Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// 当用户选择当前RadioGroup组成的button时被触发
switch (arg1) {
case R.id.rb_male:
person.setSex("男");
break;
case R.id.rb_female:
person.setSex("女");
break;
default:
break;
}
Log.i("sex", person.getSex());
}
}
class CheckBoxListener implements
android.widget.CompoundButton.OnCheckedChangeListener {
@Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// 当控件状态改变时触发
CheckBox cbox = (CheckBox) arg0;
switch (cbox.getId()) {
case R.id.cb_fish:
if (arg1) {
isFish = true;
} else {
isFish = false;
}
break;
case R.id.cb_hot:
if (arg1) {
isHot = true;
} else {
isHot = false;
}
break;
case R.id.cb_sour:
if (arg1) {
isSour = true;
} else {
isSour = false;
}
break;
default:
break;
}
Log.i("sex", "海鲜" + isFish + "辣" + isHot + "酸" + isSour);
}
}
// seekbar监听函数
class SeekBarListener implements OnSeekBarChangeListener {
@Override
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
price = seekbar.getProgress();// 获取当前默认值
Toast.makeText(MainActivity.this, "价格:" + price, Toast.LENGTH_SHORT)
.show();
}
}
// 寻找的监听
class ButtonListener implements OnClickListener {
@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.bt_find:
// 当用户点击寻找时，需要帅选信息，并显示到TextView上
checkData();
break;
case R.id.tb_click:
// 选中状态和未选中状态
if (!togglebutton.isChecked())// 如果是选中状态
{
for (int i = 0; i < lists_get.size(); i++) {
// showPic(i);
// showPic(i);
Food food = lists_get.get(i);
Person perosn = new Person();
person.setFood(food);// 封装到person中
Toast.makeText(MainActivity.this, "" + person,
Toast.LENGTH_SHORT).show();
// Log.i("id",
// Integer.toString(lists_get.get(i).getPic()));
}
} else {
if (lists_get.isEmpty()) {
Toast.makeText(MainActivity.this, "" + "没有信息",
Toast.LENGTH_SHORT).show();
} else {
if (lists_get.size() > i) {
// showPic(i);
// Food food=lists_get.get(i);
// Person perosn=new Person();
showPic(i);// 封装到person中
Log.i("id", "第" + i + "个" + "-" + "数组长度"
+ lists_get.size());
i++;
break;
} else {
Toast.makeText(MainActivity.this, "到末尾啦",
Toast.LENGTH_SHORT).show();
}
}
// Log.i("id", Integer.toString(lists_get.get(i).getPic()));
}
break;
default:
break;
}
}
private void checkData() {
// 找出菜品
for (int i = 0; i < lists_food.size(); i++) {
Food food = lists_food.get(i);
if (food.getPrice() <= price && food.isFish() == isFish
&& food.isHot() == isHot && food.isSour() == isSour) {
lists_get.add(food);
Log.i("find", Integer.toString(lists_get.size()));
}
}
}
// 显示菜品图片
private void showPic(int count) {
iv_pic.setImageResource(lists_get.get(count).getPic());
}
// toggleButton的方法
}
}
