day12

点击登录按钮时实现对云数据库的查询，然后和输入框的账号和密码的比对确认密码是否正确

public void run() {
                        try {

                            final JSONObject jsonObject=new JSONObject(String.valueOf(HttpUtil.sendPost(requrl,reqdata)));//子线程获取json结果
                                    runOnUiThread(new Runnable() {    //主线程运行跳转活动
                                        @Override
                                        public void run() {
                                        try {
                                            System.out.println(shishei+"+qweqew");
                                            Toast.makeText(LoginActivity2.this, jsonObject.get("msg").toString(), Toast.LENGTH_SHORT).show();
                                            System.out.println(jsonObject.get("status"));
                                            if(jsonObject.get("status").equals("1")&&shishei.equals("学生")){  //状态码1代表登陆成功
                                                if(!judgeUserExists(name))
                                                   recordUser(name);  //StudentActivity
                                                new Thread(new Runnable() {
                                                    @Override
                                                    public void run() {
                                                        try {
                                                            requrl="http://123.57.69.167/KeKeTong/findStuIDByUsername";;
                                                            final String reqdata="shishei="+"学生"+"&username="+name+"";
                                                            final JSONObject jsonObject=new JSONObject(String.valueOf(HttpUtil.sendPost(requrl,reqdata)));//子线程获取json结果
                                                            if(jsonObject.get("status").equals("1")){  //状态码1代表有信息
                                                                if((String)jsonObject.opt("StuID")==null)
                                                                {
                                                                    Intent intent=new Intent(LoginActivity2.this, SetInfo.class)
                                                                            .putExtra("id",jsonObject.get("id").toString());
                                                                    Bundle bundle=new Bundle();//用Bundle携带数据
                                                                    bundle.putString("zhanghao", name); //传递name参数为账号
                                                                    bundle.putString("password", userpwd); //传递密码参数为密码
                                                                    intent.putExtras(bundle);
                                                                    startActivity(intent);//跳转到设置信息界面
                                                                }
                                                                else {
                                                                    String StuID = (String) jsonObject.get("StuID");
                                                                    Intent intent = new Intent(LoginActivity2.this, MainActivity.class);
                                                                    Bundle bundle = new Bundle();//用Bundle携带数据
                                                                    bundle.putString("StuID", StuID); //传递密码参数为密码
                                                                    intent.putExtras(bundle);
                                                                    startActivity(intent);//跳转到学生主页面
                                                                }
                                                            }
                                                            else {
                                                                Intent intent=new Intent(LoginActivity2.this, RegisterActivity.class)
                                                                        .putExtra("id",jsonObject.get("id").toString());
                                                                startActivity(intent);//跳转到设置信息界面
                                                            }
                                                        } catch (JSONException e){
                                                            e.printStackTrace();
                                                        }
                                                    }
                                                }).start();
                                            }
                                            else if(jsonObject.get("status").equals("1")&&shishei.equals("教职工")){  //状态码1代表登陆成功
                                                if(!judgeUserExists(name))
                                                   recordUser(name);
                                                Intent intent=new Intent(LoginActivity2.this, MainActivity.class)
                                                        .putExtra("id",jsonObject.get("id").toString());
                                                /*Intent intent=new Intent(LoginActivity2.this, SetInfo2.class)
                                                        .putExtra("id",jsonObject.get("id").toString());*/
                                                Bundle bundle=new Bundle();//用Bundle携带数据
                                                bundle.putString("zhanghao", name); //传递name参数为账号
                                                bundle.putString("password", userpwd); //传递密码参数为密码
                                                intent.putExtras(bundle);
                                                startActivity(intent);//跳转到设置登录密码界面
                                            }
                                        } catch (JSONException e) {
                                            e.printStackTrace();
                                        }
                                    }
                            });
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }).start();

状态码的设计

package Home.login;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;

import java.util.Random;

/**
 * Created by littlecurl 2018/6/24
 */

public class Code {
    /**
     * 随机数数组
     * 去除了易混淆的 数字 0 和 字母 o O
     *                数字 1 和 字母 i I l L
     *                数字 6 和 字母 b
     *                数字 9 和 字母 q
     *                字母 c C 和 G
     *                字母 t （经常和随机线混在一起看不清）
     */
    private static final char[] CHARS = {
            '2', '3', '4', '5',  '7', '8',
            'a',  'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm',
            'n', 'p',  'r', 's',  'u', 'v', 'w', 'x', 'y', 'z',
            'A', 'B',  'D', 'E', 'F',  'H',  'J', 'K', 'M',
            'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
    };

    private static Code bmpCode;

    public static Code getInstance() {
        if(bmpCode == null)
            bmpCode = new Code();
        return bmpCode;
    }

    //default settings
    //验证码默认随机数的个数
    private static final int DEFAULT_CODE_LENGTH = 4;
    //默认字体大小
    private static final int DEFAULT_FONT_SIZE = 25;
    //默认线条的条数
    private static final int DEFAULT_LINE_NUMBER = 5;
    //padding值
    private static final int BASE_PADDING_LEFT = 10, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 15, RANGE_PADDING_TOP = 20;
    //验证码的默认宽高
    private static final int DEFAULT_WIDTH = 100, DEFAULT_HEIGHT = 40;

    //settings decided by the layout xml
    //canvas width and height
    private int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT;

    //random word space and pading_top
    private int base_padding_left = BASE_PADDING_LEFT, range_padding_left = RANGE_PADDING_LEFT,
            base_padding_top = BASE_PADDING_TOP, range_padding_top = RANGE_PADDING_TOP;

    //number of chars, lines; font size
    private int codeLength = DEFAULT_CODE_LENGTH, line_number = DEFAULT_LINE_NUMBER, font_size = DEFAULT_FONT_SIZE;

    //variables
    private String code;
    private int padding_left, padding_top;
    private Random random = new Random();
    //验证码图片
    public Bitmap createBitmap() {
        padding_left = 0;

        Bitmap bp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(bp);

        code = createCode();

        c.drawColor(Color.WHITE);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setTextSize(font_size);
        //画验证码
        for (int i = 0; i < code.length(); i++) {
            randomTextStyle(paint);
            randomPadding();
            c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);
        }
        //画线条
        for (int i = 0; i < line_number; i++) {
            drawLine(c, paint);
        }

//        c.save( Canvas.ALL_SAVE_FLAG );//保存
        c.save();//保存
        c.restore();//
        return bp;
    }

    public String getCode() {
        return code;
    }

    //生成验证码
    private String createCode() {
        StringBuilder buffer = new StringBuilder();
        for (int i = 0; i < codeLength; i++) {
            buffer.append(CHARS[random.nextInt(CHARS.length)]);
        }
        return buffer.toString();
    }
    //画干扰线
    private void drawLine(Canvas canvas, Paint paint) {
        int color = randomColor();
        int startX = random.nextInt(width);
        int startY = random.nextInt(height);
        int stopX = random.nextInt(width);
        int stopY = random.nextInt(height);
        paint.setStrokeWidth(1);
        paint.setColor(color);
        canvas.drawLine(startX, startY, stopX, stopY, paint);
    }
    //生成随机颜色
    private int randomColor() {
        return randomColor(1);
    }

    private int randomColor(int rate) {
        int red = random.nextInt(256) / rate;
        int green = random.nextInt(256) / rate;
        int blue = random.nextInt(256) / rate;
        return Color.rgb(red, green, blue);
    }
    //随机生成文字样式，颜色，粗细，倾斜度
    private void randomTextStyle(Paint paint) {
        int color = randomColor();
        paint.setColor(color);
        paint.setFakeBoldText(random.nextBoolean());  //true为粗体，false为非粗体
        float skewX = random.nextInt(11) / 10;
        skewX = random.nextBoolean() ? skewX : -skewX;
        paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜
        //paint.setUnderlineText(true); //true为下划线，false为非下划线
        //paint.setStrikeThruText(true); //true为删除线，false为非删除线
    }
    //随机生成padding值
    private void randomPadding() {
        padding_left += base_padding_left + random.nextInt(range_padding_left);
        padding_top = base_padding_top + random.nextInt(range_padding_top);
    }
}