Android栗子の图片验证码生成实例代码
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；
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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创新互联网站的支持！
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