Android图形验证码 Android图形验证码

先看效果图
文章图片
效果图给上fragment_mine.xml布局代码：

【Android图形验证码】再上MineFragment代码：

import android.graphics.Bitmap; import android.text.TextUtils; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.Toast; import com.jinshanjf.mxyinhao.R; import com.jinshanjf.mxyinhao.other.ui.BaseFragment; import com.jinshanjf.mxyinhao.other.util.CodeUtils; /** * Created by lcw on 2018/4/24. */public class MineFragment extends BaseFragment implements View.OnClickListener { private ImageView image; private EditText et; private Button btn, submit; private String codeStr; private CodeUtils codeUtils; @Override protected int getViewById() { return R.layout.fragment_mine; }@Override protected void initView() { image = view.findViewById(R.id.image); et = view.findViewById(R.id.et); btn = view.findViewById(R.id.btn); submit = view.findViewById(R.id.btn_submit); btn.setOnClickListener(this); submit.setOnClickListener(this); getCode(); }@Override protected void initDate() {}@Override protected void initEvent() {}//获取验证码 private void getCode() { codeUtils = CodeUtils.getInstance(); Bitmap bitmap = codeUtils.createBitmap(); image.setImageBitmap(bitmap); }@Override public void onClick(View v) { switch (v.getId()) { case R.id.btn: getCode(); break; case R.id.btn_submit: codeStr = et.getText().toString().trim(); Log.e("codeStr", codeStr); if (null == codeStr || TextUtils.isEmpty(codeStr)) { Toast.makeText(getContext(), "请输入验证码", Toast.LENGTH_SHORT).show(); return; } String code = codeUtils.getCode(); Log.e("code", code); if (code.equalsIgnoreCase(codeStr)) { Toast.makeText(getContext(), "验证码正确", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(getContext(), "验证码错误", Toast.LENGTH_SHORT).show(); getCode(); } break; default: break; } } }

最后附上CodeUtils代码：

import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import java.util.Random; /** *Created by lcw on 2018/4/24. * 用于图片验证码的工具类 */ public class CodeUtils { private static final char[] CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' }; private static CodeUtils mCodeUtils; private int mPaddingLeft, mPaddingTop; private StringBuilder mBuilder = new StringBuilder(); private Random mRandom = new Random(); //Default Settings private static final int DEFAULT_CODE_LENGTH = 6; //验证码的长度这里是6位 private static final int DEFAULT_FONT_SIZE = 60; //字体大小 private static final int DEFAULT_LINE_NUMBER = 3; //多少条干扰线 private static final int BASE_PADDING_LEFT = 20; //左边距 private static final int RANGE_PADDING_LEFT = 30; //左边距范围值 private static final int BASE_PADDING_TOP = 70; //上边距 private static final int RANGE_PADDING_TOP = 15; //上边距范围值 private static final int DEFAULT_WIDTH = 300; //默认宽度.图片的总宽 private static final int DEFAULT_HEIGHT = 100; //默认高度.图片的总高 private static final int DEFAULT_COLOR = 0xDF; //默认背景颜色值private String code; public static CodeUtils getInstance() { if(mCodeUtils == null) { mCodeUtils = new CodeUtils(); } return mCodeUtils; }//生成验证码图片 public Bitmap createBitmap() { mPaddingLeft = 0; //每次生成验证码图片时初始化 mPaddingTop = 0; Bitmap bitmap = Bitmap.createBitmap(DEFAULT_WIDTH, DEFAULT_HEIGHT, Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); code = createCode(); canvas.drawColor(Color.rgb(DEFAULT_COLOR, DEFAULT_COLOR, DEFAULT_COLOR)); Paint paint = new Paint(); paint.setTextSize(DEFAULT_FONT_SIZE); for (int i = 0; i < code.length(); i++) { randomTextStyle(paint); randomPadding(); canvas.drawText(code.charAt(i) + "" , mPaddingLeft, mPaddingTop, paint); } //干扰线 for (int i = 0; i < DEFAULT_LINE_NUMBER; i++) { drawLine(canvas, paint); } canvas.save(Canvas.ALL_SAVE_FLAG); //保存 canvas.restore(); return bitmap; } /** * 得到图片中的验证码字符串 * @return */ public String getCode() { return code; }//生成验证码 public String createCode() { mBuilder.delete(0, mBuilder.length()); //使用之前首先清空内容 for (int i = 0; i < DEFAULT_CODE_LENGTH; i++) { mBuilder.append(CHARS[mRandom.nextInt(CHARS.length)]); } return mBuilder.toString(); }//生成干扰线 private void drawLine(Canvas canvas, Paint paint) { int color = randomColor(); int startX = mRandom.nextInt(DEFAULT_WIDTH); int startY = mRandom.nextInt(DEFAULT_HEIGHT); int stopX = mRandom.nextInt(DEFAULT_WIDTH); int stopY = mRandom.nextInt(DEFAULT_HEIGHT); paint.setStrokeWidth(1); paint.setColor(color); canvas.drawLine(startX, startY, stopX, stopY, paint); }//随机颜色 private int randomColor() { mBuilder.delete(0, mBuilder.length()); //使用之前首先清空内容 String haxString; for (int i = 0; i < 3; i++) { haxString = Integer.toHexString(mRandom.nextInt(0xFF)); if (haxString.length() == 1) { haxString = "0" + haxString; } mBuilder.append(haxString); } return Color.parseColor("#" + mBuilder.toString()); }//随机文本样式 private void randomTextStyle(Paint paint) { int color = randomColor(); paint.setColor(color); paint.setFakeBoldText(mRandom.nextBoolean()); //true为粗体，false为非粗体 float skewX = mRandom.nextInt(11) / 10; skewX = mRandom.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 }//随机间距 private void randomPadding() { mPaddingLeft += BASE_PADDING_LEFT + mRandom.nextInt(RANGE_PADDING_LEFT); mPaddingTop = BASE_PADDING_TOP + mRandom.nextInt(RANGE_PADDING_TOP); } }

就这么简单。。。