Android滑动图片验证码

最新推荐文章于 2024-06-22 19:00:00 发布

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最新推荐文章于 2024-06-22 19:00:00 发布 · 1.2k 阅读

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#android #java #开发语言

滑动图片验证：随着seekbar滑动，view随着动就是了，主要就是图片的比例跟滑块的图片比例

number就是相应的比例

public class SlideImageView extends View {
    Bitmap bitmap;
    Bitmap verifyBitmap;
    Paint paint = new Paint();
    // 拼图的位置
    int y;
    // 移动x坐标
    int moveX;
    // x坐标最大移动长度
    int moveMax;
    private float number;//扩大倍数
    DecimalFormat df = new DecimalFormat("0.0000");

    public SlideImageView(Context context) {
        super(context);
    }

    public SlideImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SlideImageView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = getMeasuredWidth();
        setMeasuredDimension(width,width/2);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (bitmap == null)
            return;

        moveMax = getWidth();
        int bitmapWidth = bitmap.getWidth();
        int bitmapHeight = bitmap.getHeight();
        //画背景图
        int width = getWidth();
        int height = getHeight();
        number = Float.parseFloat(df.format((float)width/bitmapWidth));
        Bitmap mBitmap = Bitmap.createScaledBitmap(bitmap, width, height, true);
        canvas.drawBitmap(mBitmap, 0, 0, paint);
        //滑块
        int verWidth = (int)(verifyBitmap.getWidth()*number);
        int verHeight = (int)(verifyBitmap.getHeight()*number);
        int verY = (int)(y*number);
        Bitmap mverifyBitmap = Bitmap.createScaledBitmap(verifyBitmap, verWidth, verHeight, true);
        canvas.drawBitmap(mverifyBitmap, moveX, verY, paint);//画验证图片

    }

    public void setImageBitmap(Bitmap bitmap, Bitmap verifyBitmap, int verifyY) {
        this.bitmap = bitmap;
        this.verifyBitmap = veri