废话不多说了,下面一段代码给大家分享android 生成栗子图片验证码功能,具体代码如下所示;
import java.util.Random; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; public class Autjcode { private static Autjcode bmpCode; private int width = 100, height = 60; private int base_padding_left = 15, range_padding_left = 5, base_padding_top = 25, range_padding_top = 30; private int codeLength = 4, line_number = 2, font_size = 25; private String code; private int padding_left, padding_top; private static final char[] CHARS = { '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', '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', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' }; /** * 获得实例 * * @return */ public static Autjcode getInstance() { if (bmpCode == null) bmpCode = new Autjcode(); return bmpCode; } private Random random = new Random(); /** * 创建位图 * * @return */ public Bitmap createBitmap() { padding_left = 0; // ARGB_8888表示为32位的ARGB位图 Bitmap bp = Bitmap.createBitmap(width, height, Config.ARGB_8888); Canvas c = new Canvas(bp); code = createCode(); c.drawColor(Color.WHITE); Paint paint = new Paint(); paint.setTextSize(font_size); paint.setFakeBoldText(true); for (int i = 0; i < code.length(); i++) { randomTextStyle(paint); randomPadding(); c.drawText(code.charAt(i) + "", padding_left, padding_top, paint); } for (int i = 0; i <= line_number; i++) { drawLine(c, paint); } c.save(Canvas.ALL_SAVE_FLAG);// 保存 c.restore(); return bp; } public String getCode() { return code; } // 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(); } /** * 划线 * * @param canvas * @param paint */ 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); } 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); } private void randomTextStyle(Paint paint) { int color = randomColor(); paint.setColor(color); paint.setFakeBoldText(random.nextBoolean()); float skewX = random.nextInt(11) / 10; skewX = random.nextBoolean() ? skewX : -skewX; paint.setTextSkewX(skewX); } private void randomPadding() { padding_left += base_padding_left + random.nextInt(range_padding_left); padding_top = base_padding_top + random.nextInt(range_padding_top); } }
使用方法:
初始化:
registerAuthimg = (ImageView) findViewById(R.id.registerAuthimg); registerAuthimg.setImageBitmap(Autjcode.getInstance().createBitmap());
验证码刷新:
registerAuthimg.setImageBitmap(Autjcode.getInstance().createBitmap());
获取当前显示的文字验证码:
String Autecodeimg = Autjcode.getInstance().getCode().toUpperCase();
总结
以上所述是小编给大家介绍的Android栗子の图片验证码生成实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对亿速云网站的支持!
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