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创建安卓应用

将背景图片拷贝到drawable目录

主布局资源文件activity_main.xml

字符串资源文件strings.xml

       
    
     正确
        
    
     错误
        
    
     上一题
        
    
     下一题
        
    
     提交
        
    
     退出
    
   

创建试题实体类

package net.tp.standrd;/** *功能：试题实体类 */public class Question {    /**     * 编号     */    private int id;    /**     * 题干     */    private String stem;    /**     * A选项     */    private String a;    /**     * B选项     */    private String b;    /**     * C选项     */    private String c;    /**     * D选项     */    private String d;    /**     * 题型     * 1 - 单选题     * 2 - 多选题     * 3 - 判断题     */    private int type;    /**     * 答案     */    private String answer;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getStem() {        return stem;    }    public void setStem(String stem) {        this.stem = stem;    }    public String getA() {        return a;    }    public void setA(String a) {        this.a = a;    }    public String getB() {        return b;    }    public void setB(String b) {        this.b = b;    }    public String getC() {        return c;    }    public void setC(String c) {        this.c = c;    }    public String getD() {        return d;    }    public void setD(String d) {        this.d = d;    }    public int getType() {        return type;    }    public void setType(int type) {        this.type = type;    }    public String getAnswer() {        return answer;    }    public void setAnswer(String answer) {        this.answer = answer;    }    @Override    public String toString() {        return "Question{" +                "id=" + id +                ", stem='" + stem + '\'' +                ", a='" + a + '\'' +                ", b='" + b + '\'' +                ", c='" + c + '\'' +                ", d='" + d + '\'' +                ", type=" + type +                ", answer='" + answer + '\'' +                '}';    }}

主界面类MainActivity

package net.tp.standrd;import android.app.AlertDialog;import android.graphics.Color;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.CheckBox;import android.widget.LinearLayout;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.TextView;import androidx.appcompat.app.AppCompatActivity;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {    private LinearLayout llSingleChoice;    private LinearLayout llMultipleChoice;    private LinearLayout llJudgement;    private TextView tvStem;    private RadioGroup rgSingleChoice;    private RadioButton rbSingleA;    private RadioButton rbSingleB;    private RadioButton rbSingleC;    private RadioButton rbSingleD;    private RadioGroup rgJudgement;    private RadioButton rbJudgementT;    private RadioButton rbJudgementF;    private CheckBox cbMultipleA;    private CheckBox cbMultipleB;    private CheckBox cbMultipleC;    private CheckBox cbMultipleD;    private ArrayList
   
     questions;    private int questionIndex;    private String[] answers;    private String answer;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // 利用布局资源文件设置用户界面        setContentView(R.layout.activity_main);        // 通过资源标识符获得控件实例        llSingleChoice = findViewById(R.id.ll_single_choice);        llMultipleChoice = findViewById(R.id.ll_multiple_choice);        llJudgement = findViewById(R.id.ll_judgement);        tvStem = findViewById(R.id.tv_stem);        rgSingleChoice = findViewById(R.id.rg_single_choice);        rbSingleA = findViewById(R.id.rb_single_a);        rbSingleB = findViewById(R.id.rb_single_b);        rbSingleC = findViewById(R.id.rb_single_c);        rbSingleD = findViewById(R.id.rb_single_d);        rgJudgement = findViewById(R.id.rg_judgement);        rbJudgementT = findViewById(R.id.rb_judgement_t);        rbJudgementF = findViewById(R.id.rb_judgement_f);        cbMultipleA = findViewById(R.id.cb_multiple_a);        cbMultipleB = findViewById(R.id.cb_multiple_b);        cbMultipleC = findViewById(R.id.cb_multiple_c);        cbMultipleD = findViewById(R.id.cb_multiple_d);        // 初始化试题库        questions = getQuestions();        // 实例化答案数组        answers = new String[questions.size()];        // 取出第1题        Question question = questions.get(questionIndex);        // 根据题型设置界面        setInterfaceByType(question);    }    /**     * 获取试题列表     *     * @return 试题列表     */    private ArrayList
    
      getQuestions() {        ArrayList
     
       questions = new ArrayList<>();        // 创建第1题        Question question = new Question();        question.setId(1);        question.setStem("驾驶机动车在道路上违反道路交通安全法的行为，属于什么行为？");        question.setA("违章行为");        question.setB("违法行为");        question.setC("过失行为");        question.setD("违规行为");        question.setType(1);        question.setAnswer("B");        // 将第1题添加到试题库        questions.add(question);        // 创建第2题        question = new Question();        question.setId(2);        question.setStem("交通信号包括交通信号灯、交通标志、交通标线和交通警察的指挥。");        question.setA("正确");        question.setB("错误");        question.setC("");        question.setD("");        question.setType(3);        question.setAnswer("A");        // 将第2题添加到试题库        questions.add(question);        // 创建第3题        question = new Question();        question.setId(3);        question.setStem("机动车驾驶人违法驾驶造成重大交通事故构成犯罪的，依法追究什么责任？");        question.setA("刑事责任");        question.setB("民事责任");        question.setC("经济责任");        question.setD("直接责任");        question.setType(1);        question.setAnswer("A");        // 将第3题添加到试题库        questions.add(question);        // 创建第4题        question = new Question();        question.setId(4);        question.setStem("钱某驾驶大型卧铺客车，乘载45人（核载40人），保持40公里/小时以上的车速行至八宿县境内连续下坡急转弯路段处，翻下100米深的山崖，造成17人死亡、20人受伤。钱某的主要违法行为是什么？");        question.setA("驾驶时接听手持电话");        question.setB("超速行驶");        question.setC("客车超员");        question.setD("疲劳驾驶");        question.setType(2);        question.setAnswer("BC");        // 将第4题添加到试题库        questions.add(question);        // 创建第5题        question = new Question();        question.setId(5);        question.setStem("邹某驾驶大型卧铺客车（核载35人，实载47人），行至京港澳高速公路938公里时，因乘车人携带的大量危险化学品在车厢内突然发生爆燃，造成41人死亡，6人受伤。此事故中的主要违法行为是什么？");        question.setA("客车超员");        question.setB("乘车人携带易燃易爆危险物品");        question.setC("超速行驶");        question.setD("不按规定停车");        question.setType(2);        question.setAnswer("AB");        // 将第5题添加到试题库        questions.add(question);        return questions;    }    /**     * 根据题型设置界面     *     * @param question     */    private void setInterfaceByType(Question question) {        // 判断题型，选择界面        switch (question.getType()) {            case 1:                llSingleChoice.setVisibility(View.VISIBLE);                llMultipleChoice.setVisibility(View.INVISIBLE);                llJudgement.setVisibility(View.INVISIBLE);                tvStem.setText("[单选] " + question.getId() + ". " + question.getStem());                tvStem.setTextColor(Color.RED);                rbSingleA.setText(question.getA());                rbSingleB.setText(question.getB());                rbSingleC.setText(question.getC());                rbSingleD.setText(question.getD());                // 清空控件选中状态                rbSingleA.setChecked(false);                rbSingleB.setChecked(false);                rbSingleC.setChecked(false);                rbSingleD.setChecked(false);                rgSingleChoice.check(-1);                answer = answers[questionIndex];                if (answer != null) {                    // 根据用户答案来设定单选按钮状态                    switch (answer) {                        case "A":                            rbSingleA.setChecked(true);                            break;                        case "B":                            rbSingleB.setChecked(true);                            break;                        case "C":                            rbSingleC.setChecked(true);                            break;                        case "D":                            rbSingleD.setChecked(true);                            break;                    }                }                break;            case 2:                llMultipleChoice.setVisibility(View.VISIBLE);                llSingleChoice.setVisibility(View.INVISIBLE);                llJudgement.setVisibility(View.INVISIBLE);                tvStem.setText("[多选] " + question.getId() + ". " + question.getStem());                tvStem.setTextColor(Color.BLACK);                cbMultipleA.setText(question.getA());                cbMultipleB.setText(question.getB());                cbMultipleC.setText(question.getC());                cbMultipleD.setText(question.getD());                // 清空控件选中状态                cbMultipleA.setChecked(false);                cbMultipleB.setChecked(false);                cbMultipleC.setChecked(false);                cbMultipleD.setChecked(false);                answer = answers[questionIndex];                if (answer != null) {                    for (int i = 0; i < answer.length(); i++) {                        switch (answer.charAt(i)) {                            case 'A':                                cbMultipleA.setChecked(true);                                break;                            case 'B':                                cbMultipleB.setChecked(true);                                break;                            case 'C':                                cbMultipleC.setChecked(true);                                break;                            case 'D':                                cbMultipleD.setChecked(true);                                break;                        }                    }                }                break;            case 3:                llJudgement.setVisibility(View.VISIBLE);                llSingleChoice.setVisibility(View.INVISIBLE);                llMultipleChoice.setVisibility(View.INVISIBLE);                tvStem.setText("[判断] " + question.getId() + ". " + question.getStem());                tvStem.setTextColor(Color.BLUE);                // 清空控件选中状态                rbJudgementT.setChecked(false);                rbJudgementF.setChecked(false);                rgJudgement.check(-1);                // 根据用户答案来设定单选按钮状态                answer = answers[questionIndex];                if (answer != null) {                    switch (answer) {                        case "A":                            rbJudgementT.setChecked(true);                            break;                        case "B":                            rbJudgementF.setChecked(true);                            break;                    }                }        }    }    /**     * 退出     *     * @param view     */    public void doExit(View view) {        finish();    }    /**     * 上一题     *     * @param view     */    public void doPrevious(View view) {        // 判断用户是否做了本题        switch (questions.get(questionIndex).getType()) {            case 1:                if (rbSingleA.isChecked() || rbSingleB.isChecked() || rbSingleC.isChecked() || rbSingleD.isChecked()) {                    saveAnswer();                }                break;            case 2:                if (cbMultipleA.isChecked() || cbMultipleB.isChecked() || cbMultipleC.isChecked() || cbMultipleD.isChecked()) {                    saveAnswer();                }                break;            case 3:                if (rbJudgementT.isChecked() || rbJudgementF.isChecked()) {                    saveAnswer();                }                break;        }        if (questionIndex > 0) {            questionIndex--;        } else {            questionIndex = questions.size() - 1;        }        // 根据题型设置界面        setInterfaceByType(questions.get(questionIndex));    }    /**     * 下一题     *     * @param view     */    public void doNext(View view) {        // 判断用户是否做了本题        switch (questions.get(questionIndex).getType()) {            case 1:                if (rbSingleA.isChecked() || rbSingleB.isChecked() || rbSingleC.isChecked() || rbSingleD.isChecked()) {                    saveAnswer();                }                break;            case 2:                if (cbMultipleA.isChecked() || cbMultipleB.isChecked() || cbMultipleC.isChecked() || cbMultipleD.isChecked()) {                    saveAnswer();                }                break;            case 3:                if (rbJudgementT.isChecked() || rbJudgementF.isChecked()) {                    saveAnswer();                }                break;        }        Log.d("test", (questionIndex + 1) + answers[questionIndex]);        if (questionIndex < questions.size() - 1) {            questionIndex++;        } else {            questionIndex = 0;        }        // 根据题型设置界面        setInterfaceByType(questions.get(questionIndex));    }    /**     * 提交按钮单击事件处理方法     *     * @param view     */    public void doSubmit(View view) {        // 保存当前题目答案        saveAnswer();        // 计算成绩点        int points = 0;        for (int i = 0; i < questions.size(); i++) {            if (null != answers[i]) {                if (answers[i].equals(questions.get(i).getAnswer())) {                    points++;                }            }        }        // 按百分制来折算分数        double score = points * 100 / questions.size();        // 根据分数给出评语        String comment = "";        if (score >= 90) {            comment = "分数：" + score + "\n评语：棒棒哒~";        } else if (score >=60) {            comment = "分数：" + score + "\n评语：还行吧！";        } else {            comment = "分数：" + score + "\n评语：好好干吧！";        }        // 利用警告对话框来显示测试结果        AlertDialog.Builder builder = new AlertDialog.Builder(this);        builder.setIcon(R.mipmap.ic_launcher_round)                .setTitle("测试结果")                .setMessage(comment)                .setPositiveButton("确定", null)                .create()                .show();    }    /**     * 保存用户选择的答案     */    private void saveAnswer() {        switch (questions.get(questionIndex).getType()) {            case 1: // 单选题                if (rbSingleA.isChecked()) {                    answers[questionIndex] = "A";                } else if (rbSingleB.isChecked()) {                    answers[questionIndex] = "B";                } else if (rbSingleC.isChecked()) {                    answers[questionIndex] = "C";                } else {                    answers[questionIndex] = "D";                }                break;            case 2: // 多选题                StringBuilder builder = new StringBuilder();                if (cbMultipleA.isChecked()) {                    builder.append("A");                }                if (cbMultipleB.isChecked()) {                    builder.append("B");                }                if (cbMultipleC.isChecked()) {                    builder.append("C");                }                if (cbMultipleD.isChecked()) {                    builder.append("D");                }                answers[questionIndex] = builder.toString();                break;            case 3: // 判断题                if (rbJudgementT.isChecked()) {                    answers[questionIndex] = "A";                } else {                    answers[questionIndex] = "B";                }                break;        }    }}
     
    
   

运行效果

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