有2个问题

问题在toggleButton按钮哪里，看注释说明

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package com.imooc.basictestdemo;
 
import java.util.ArrayList;
import java.util.List;
 
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
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;
 
public class MainActivity extends Activity {
    private EditText name;
    private RadioGroup sex;
    private CheckBox hot, fish, sour;
    private SeekBar seekBar;
    private Button find;
    private ImageView imageView;
    private ToggleButton toggleButton;
    private List<Food> lists_food;
    private List<Food> lists_get;
    private Person person;
    private RadioGroupListener radioGroupListener;
    private boolean isFish;
    private boolean isHot;
    private boolean isSour;
    private CheckBoxListener checkBoxListener;
    private int price = 30;
    private SeekBarListener seekBarListener;
    private ButtonListener buttonListener;
    private int count;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_food);
        // 初始化控件
        initView();
        // 初始化数据
        initData();
        // 为控件添加监听器
        setListener();
    }
 
    private void initView() {
        name = (EditText) findViewById(R.id.et_name);
        sex = (RadioGroup) findViewById(R.id.rg_sex);
        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_price);
        seekBar.setProgress(30);
        find = (Button) findViewById(R.id.btn_find);
        toggleButton = (ToggleButton) findViewById(R.id.tb_click);
        toggleButton.setChecked(true);
        imageView = (ImageView) findViewById(R.id.iv_pic);
    }
 
    private void initData() {
        person = new Person();
        lists_get = new ArrayList<Food>();
        lists_food = 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("酸辣粉", 40, R.drawable.suanlatang, true, false,
                true));
    }
 
    private void setListener() {
        radioGroupListener = new RadioGroupListener();
        sex.setOnCheckedChangeListener(radioGroupListener);
        checkBoxListener = new CheckBoxListener();
        fish.setOnCheckedChangeListener(checkBoxListener);
        hot.setOnCheckedChangeListener(checkBoxListener);
        sour.setOnCheckedChangeListener(checkBoxListener);
        seekBarListener = new SeekBarListener();
        seekBar.setOnSeekBarChangeListener(seekBarListener);
        buttonListener = new ButtonListener();
        find.setOnClickListener(buttonListener);
        toggleButton.setOnClickListener(buttonListener);
    }
 
    class RadioGroupListener implements OnCheckedChangeListener {
 
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // 当用户选择当前的RadioGroup组的Button时被触发
            switch (checkedId) {
            case R.id.rb_man:
                person.setSex("男");
                break;
            case R.id.rb_woman:
                person.setSex("女");
                break;
            }
            System.out.println("性别:" + person.getSex());
        }
    }
 
    class CheckBoxListener implements
            android.widget.CompoundButton.OnCheckedChangeListener {
 
        @Override
        public void onCheckedChanged(CompoundButton buttonView,
                boolean isChecked) {
            // 当控件状态改变时被触发
            CheckBox cbBox = (CheckBox) buttonView;
            switch (cbBox.getId()) {
            case R.id.cb_fish:
                if (isChecked) {
                    isFish = true;
                } else {
                    isFish = false;
                }
                break;
            case R.id.cb_sour:
                if (isChecked) {
                    isSour = true;
                } else {
                    isSour = false;
                }
                break;
            case R.id.cb_hot:
                if (isChecked) {
                    isHot = true;
                } else {
                    isHot = false;
                }
                break;
            }
            System.out.println("当前喜好:" + " 辣:" + isHot + " 海鲜:" + isFish
                    + " 酸:" + isSour);
 
        }
 
    }
 
    class SeekBarListener implements OnSeekBarChangeListener {
 
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
                boolean fromUser) {
        }
 
        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
 
        }
 
        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            price = seekBar.getProgress();
            Toast.makeText(MainActivity.this, "价格:" + price,Toast.LENGTH_SHORT).show();
        }
 
    }
 
    class ButtonListener implements OnClickListener {
 
        @Override
        public void onClick(View v) {
 
            switch (v.getId()) {
            case R.id.btn_find:// 寻找菜品按钮
                count = 0;
                lists_get.clear();
                checkData();
                if (!lists_get.isEmpty()) {//判断lists_get是否为空
                    showView();
                } else {
                    Toast.makeText(MainActivity.this, "未找到相关菜品",
                            Toast.LENGTH_SHORT).show();
                    imageView.setImageResource(R.drawable.ic_launcher);
                }
                toggleButton.setChecked(true);
                break;
            case R.id.tb_click:// toggleButton按钮
                /*
                 * 老师，这里跟我预想的有点不一样
                 * toggleButton.isChecked()这个方法是判断toggleButton是否为选中状态
                 * 我在点击寻找菜品按钮的时候就强制将toggleButton设置为true，那么第一次点击该按钮的时候，
                 * 按照我的想法按钮应该是选中状态，给person添加姓名、性别、菜品信息后吐司才对，结果是反着来的，给我搞糊涂了。
                 * 您看，我加了个!，代码才能正常运行，这是什么原因呢？
                 * 
                 * 还有一个问题，点击下一个按钮的时候明显能感到卡顿是因为什么原因？
                 */
                if (!toggleButton.isChecked()) {
                    person.setName(name.getText().toString());
                    if (sex.getCheckedRadioButtonId() == R.id.rb_man) {
                        person.setSex("男");
                    }else{
                        person.setSex("女");
                    }
                    person.setFood(lists_get.get(count));
                    Toast.makeText(MainActivity.this, person.toString(),
                            Toast.LENGTH_SHORT).show();
                    count++;
                } else {
                    if (count < lists_get.size()) {
                        showView();
                    } else {
                        Toast.makeText(MainActivity.this, "因为已到末位，所以从头显示",
                                Toast.LENGTH_SHORT).show();
                        lists_get.clear();
                        count = 0;
                        checkData();
                        showView();
                    }
                }
                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);
                }
            }
            System.out.println("*********" + lists_get.size());
 
        }
 
        //显示图片的方法
        private void showView() {
            // count值为要显示lists_get列表中第几个菜品的图片
            // count值从0开始，表示显示lists_get列表中第一次菜品的图片
            imageView.setImageResource(lists_get.get(count).getPic());
        }
    }
}

吴跃民 2017-06-07

源自：案例：餐品查询与展示 4-5 作业题

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3回答

irista23 回答被采纳获得+3积分 2017-06-08 14:58:00

布局文件没有什么问题，问题还是在java代码中，我单独把你的toggleButton在IDE中试过运行，没有出现你问题1中描述的问题，但是上述下一个点击后的代码中逻辑处理有点问题，你可以参照我的逻辑修改下代码再试试：

if (toggleButton.isChecked()) {
//判断count的值，如果count值小于集合个数-1，则count自增，否则count设为0并提示信息；
}else{
//为person设置数据并提示消息
}

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吴跃民提问者 #1

非常感谢！

2017-06-08 17:53:39

提问者吴跃民 2017-06-08 13:42:34

<Button
            android:id="@+id/btn_find"
            android:layout_width="305dp"
            android:layout_height="50dp"
            android:layout_gravity="center_horizontal"
            android:layout_margin="5dp"
            android:layout_marginLeft="36dp"
            android:text="寻找菜品"
            android:textSize="22sp" />
<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.96"
        android:background="#FFD9EC"
        android:orientation="vertical" >
 
        <ImageView
            android:id="@+id/iv_pic"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_margin="40dp"
            android:layout_weight="2.84"
            android:src="@drawable/ic_launcher" />
 
        <ToggleButton
            android:id="@+id/tb_click"
            android:layout_width="306dp"
            android:layout_height="50dp"
            android:layout_marginBottom="42dp"
            android:layout_marginLeft="24dp"
            android:background="#ADADAD"
            android:textOff="下一个"
            android:textOn="显示信息"
            android:textSize="22sp" />
</LinearLayout>

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irista23 2017-06-07 14:34:22

从java代码来看，toggleButton应该一直是开启状态的，你布局文件中对他给默认值了吗？另外在ButtonListener中没有看到你下一个按钮的点击处理，卡顿的话先检查做没做耗时的操作，如果没有跟踪一下代码，具体看程序如何运行的

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提问者吴跃民 #1

在寻找菜品按钮代码中toggleButton.setChecked(true);给了toggleButton按钮默认值true，ButtonListener中下一个按钮的点击处理是有的，我用的if (!toggleButton.isChecked()) ｛｝else｛//这里就是下一个按钮｝

2017-06-07 19:28:39
irista23 回复提问者吴跃民 #2

可以把布局文件贴出来，方便我们帮你调试

2017-06-07 22:00:45
提问者吴跃民回复 irista23 #3

布局文件太长了，没发全贴出来，我就把关键的部分贴出来了

2017-06-08 13:43:40