package com.example.answers;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import android.R.bool;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Checkable;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
/**
- 答题系统 */
public class MainActivity extends Activity {
// 数据库名称
private String DB_NAME = "question.db";
// 数据库的地址
private String DB_PATH = "/data/data/com.example.answers/databases/";
// 总的题目数据
private int count;
// 当前显示的题目
private int corrent;
// 问题
private TextView tv_title;
// 选项
RadioButton[] mRadioButton = new RadioButton[4];
// 上一题
private Button btn_up;
// 下一题
private Button btn_down;
// 详情
private TextView tv_result;
// 容器
private RadioGroup mRadioGroup;
// 是否进入错题模式
private boolean wrongMode;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFile();
initView();
initDB();
}
/**
* 初始化View
*/
private void initView() {
wrongMode = false;
tv_title = (TextView) findViewById(R.id.tv_title);
mRadioButton[0] = (RadioButton) findViewById(R.id.RadioA);
mRadioButton[1] = (RadioButton) findViewById(R.id.RadioB);
mRadioButton[2] = (RadioButton) findViewById(R.id.RadioC);
mRadioButton[3] = (RadioButton) findViewById(R.id.RadioD);
btn_down = (Button) findViewById(R.id.btn_down);
btn_up = (Button) findViewById(R.id.btn_up);
tv_result = (TextView) findViewById(R.id.tv_result);
mRadioGroup = (RadioGroup) findViewById(R.id.mRadioGroup);
}
/**
* 初始化数据库服务
*/
private void initDB() {
DBService dbService = new DBService();
final List<Question> list = dbService.getQuestion();
count = list.size();
corrent = 0;
Question q = list.get(0);
tv_title.setText(q.question);
mRadioButton[0].setText(q.answerA);
mRadioButton[1].setText(q.answerB);
mRadioButton[2].setText(q.answerC);
mRadioButton[3].setText(q.answerD);
// 上一题
btn_up.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (corrent > 0) {
corrent--;
Question q = list.get(corrent);
tv_title.setText(q.question);
mRadioButton[0].setText(q.answerA);
mRadioButton[1].setText(q.answerB);
mRadioButton[2].setText(q.answerC);
mRadioButton[3].setText(q.answerD);
tv_result.setText(q.explaination);
mRadioGroup.clearCheck();
// 设置选中
if (q.selectedAnswer != -1) {
mRadioButton[q.selectedAnswer].setChecked(true);
}
}
}
});
// 下一题
btn_down.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 判断是否为最后一题
if (corrent < count - 1) {
corrent++;
Question q = list.get(corrent);
tv_title.setText(q.question);
mRadioButton[0].setText(q.answerA);
mRadioButton[1].setText(q.answerB);
mRadioButton[2].setText(q.answerC);
mRadioButton[3].setText(q.answerD);
tv_result.setText(q.explaination);
mRadioGroup.clearCheck();
// 设置选中
if (q.selectedAnswer != -1) {
mRadioButton[q.selectedAnswer].setChecked(true);
}
} else if (corrent == count - 1 && wrongMode == true) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("提示")
.setMessage("已经到达最后一题，是否退出？")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int which) {
finish();
}
}).setNegativeButton("取消", null).show();
} else {
// 没有题目了，开始验证正确性
final List<Integer> wrongList = checkAnswer(list);
if (wrongList.size() == 0) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("提示")
.setMessage("很棒哦")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int which) {
finish();
}
}).setNegativeButton("取消", null).show();
}
// 窗口提示
new AlertDialog.Builder(MainActivity.this)
.setTitle("恭喜，答题完成！")
.setMessage(
"恭喜你本次答题"
+ (list.size() - wrongList.size())*2
+ "分" + "\n" + "答错了"
+ wrongList.size() + "道题" + "\n"
+ "是否查看错题？")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog,
int which) {
wrongMode = true;
List<Question> newList = new ArrayList<Question>();
for (int i = 0; i < wrongList
.size(); i++) {
newList.add(list.get(wrongList
.get(i)));
}
list.clear();
for (int i = 0; i < newList.size(); i++) {
list.add(newList.get(i));
}
corrent = 0;
count = list.size();
// 更新当前显示的内容
Question q = list.get(corrent);
tv_title.setText(q.question);
mRadioButton[0].setText(q.answerA);
mRadioButton[1].setText(q.answerB);
mRadioButton[2].setText(q.answerC);
mRadioButton[3].setText(q.answerD);
tv_result.setText(q.explaination);
// 显示结果
tv_result
.setVisibility(View.VISIBLE);
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(
DialogInterface dialog, int which) {
finish();
}
}).show();
}
}
});
// 答案选中
mRadioGroup
.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
for (int i = 0; i < 4; i++) {
if (mRadioButton[i].isChecked() == true) {
list.get(corrent).selectedAnswer = i;
break;
}
}
}
});
}
/*
* 判断是否答题正确
*/
private List<Integer> checkAnswer(List<Question> list) {
List<Integer> wrongList = new ArrayList<>();
for (int i = 0; i < list.size(); i++) {
// 判断对错
if (list.get(i).answer != list.get(i).selectedAnswer) {
wrongList.add(i);
}
}
return wrongList;
}
/*
* 将数据库拷贝到相应目录
*/
private void initFile() {
// 判断数据库是否拷贝到相应的目录下
if (new File(DB_PATH + DB_NAME).exists() == false) {
File dir = new File(DB_PATH);
if (!dir.exists()) {
dir.mkdir();
}
// 复制文件
try {
InputStream is = getBaseContext().getAssets().open(DB_NAME);
OutputStream os = new FileOutputStream(DB_PATH + DB_NAME);
// 用来复制文件
byte[] buffer = new byte[1024];
// 保存已经复制的长度
int length;
// 开始复制
while ((length = is.read(buffer)) > 0) {
os.write(buffer, 0, length);
}
// 刷新
os.flush();
// 关闭
os.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
