引起：java.lang.IllegalArgumentException：x必须是＆lt; bitmap.width（）

Question

public class SlimmingView extends View implements OnTouchListener {

Paint paint = new Paint();
Paint paint1 = new Paint();
Bitmap bitmap;

Bitmap rotatedBitmap,SlimmingBitmap;


private int mPosX;
private int mPosY;

int screenWidth, screenHeight;

final int bitWidth, bitHeight;


int radius;

boolean isShow=false;

public SlimmingView(Context context) {
    super(context);
    setFocusable(true);
    setFocusableInTouchMode(true);
    this.setOnTouchListener(this);

    PathEffect effects = new DashPathEffect(new float[] { 8, 8,8, 8 }, 1);
    paint.setPathEffect(effects);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(2);
    paint.setColor(Color.YELLOW);
    paint.setAntiAlias(true);


    paint1.setPathEffect(effects);
    paint1.setStyle(Paint.Style.STROKE);
    paint1.setStrokeWidth(2);
    paint1.setColor(Color.BLUE);
    paint1.setAntiAlias(true);

    bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv);



    WindowManager wm = (WindowManager) context
            .getSystemService(Context.WINDOW_SERVICE);
    screenHeight = wm.getDefaultDisplay().getHeight();
    screenWidth = wm.getDefaultDisplay().getWidth();

    mPosX = screenWidth / 2;
    mPosY = screenHeight / 2;

    bitWidth = screenWidth / 2 - bitmap.getWidth() / 2;
    bitHeight = screenHeight / 2 - bitmap.getHeight() / 2 - 22;

    radius = 40;

    SlimmingBitmap=Slimming(bitmap,mPosX-20, mPosY-20,mPosX+20, mPosY+20, radius, 0.2f);
}

@Override
public boolean onTouch(View v, MotionEvent event) {



    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN: {
        isShow=true;

        break;
    }

    case MotionEvent.ACTION_MOVE: {
        break;
    }

    case MotionEvent.ACTION_UP: {

        break;
    }

    case MotionEvent.ACTION_CANCEL: {

        break;
    }

    }

    return true;

}

@Override
protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    canvas.drawBitmap(SlimmingBitmap, 0, 0, null);
    canvas.drawCircle(mPosX-20, mPosY-20, radius, paint);
    canvas.drawCircle(mPosX+20, mPosY+20, radius, paint1);
}

public Bitmap Slimming(Bitmap bmp,int startX,int startY ,int endX,int endY,int radius,float power)
{
    //int height = bmp.getHeight();
//  int width= bmp.getWidth();

//  Bitmap bmpSephia = Bitmap.createBitmap(width, height,bmp.getConfig());
//  Canvas canvas = new Canvas(bmpSephia);

//  canvas.drawBitmap(bmp, 0, 0, null);
    for (int x = endX + radius; x > endX - radius && x > 0; x--)
    {
        for (int y = endY + radius; y > endY - radius && y > 0; y--)
        {
            if (x > bmp.getWidth() || y > bmp.getHeight())
            {
                continue;
            }

            if (Math.pow((x - endX), 2) + Math.pow((y -endY), 2) > Math.pow(radius, 2))
            {
                // not in the cic
                continue;
            }

            double LVF_Modulus = 1 - GetDistXDist(x,y, startX,startY) / (radius * radius);
            LVF_Modulus = LVF_Modulus * LVF_Modulus *  LVF_Modulus;

            LVF_Modulus = LVF_Modulus * power;

            double LVF_XPos = x - LVF_Modulus * (endX - startX);
            double LVF_YPos = y - LVF_Modulus * (endY - startY);

            long LVI_XPos1 = (long) (LVF_XPos);
            long LVI_XPos2 = LVI_XPos1 + 1;
            long LVI_YPos1 = (long)(LVF_YPos);
            long LVI_YPos2 = LVI_YPos1 + 1;

            if (LVI_XPos1 >= bmp.getWidth() ||
                    LVI_YPos1 >= bmp.getHeight() ||
                    LVI_XPos2 >= bmp.getWidth() ||
                    LVI_YPos2 >= bmp.getHeight() ||
                    LVI_XPos1 < 0 ||
                    LVI_YPos1 < 0 ||
                    LVI_XPos2 < 0 ||
                    LVI_YPos2 < 0 )
                {
                    continue;
                }


            int LVI_RValue = 0;
            int LVI_GValue = 0;
            int LVI_BValue = 0;
             double temp1 = 0;
             double temp2 = 0;

            int c = bmp.getPixel((int)LVI_YPos1, (int)LVI_XPos1);
                // a= Color.alpha(c);
                int red = Color.red(c);
                int green = Color.green(c);
                int blue = Color.blue(c);

            int c1 = bmp.getPixel((int)LVI_YPos1, (int)LVI_XPos2);  
            int red1 = Color.red(c1);
            int green1 = Color.green(c1);
            int blue1 = Color.blue(c1);

            int c2 = bmp.getPixel((int)LVI_YPos2, (int)LVI_XPos1);  
            int red2 = Color.red(c2);
            int green2 = Color.green(c2);
            int blue2 = Color.blue(c2);


            int c3 = bmp.getPixel((int)LVI_YPos2, (int)LVI_XPos2);  
            int red3 = Color.red(c3);
            int green3 = Color.green(c3);
            int blue3 = Color.blue(c3);

            temp1 = (red + (LVF_XPos - LVI_XPos1)*(red1 - red));
            temp2 = (red2 + (LVF_XPos - LVI_XPos1)*(red3 - red2));
            LVI_RValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (green + (LVF_XPos - LVI_XPos1)*(green1 - green));
            temp2 = (green2 + (LVF_XPos - LVI_XPos1)*(green3 - green2));
            LVI_GValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (blue + (LVF_XPos - LVI_XPos1)*(blue1 - blue));
            temp2 = (blue2 + (LVF_XPos - LVI_XPos1)*(blue3 - blue2));
            LVI_BValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            if (LVI_RValue> 255) {
                LVI_RValue = 255;
            } else if (LVI_RValue < 0) {
                LVI_RValue = 0;
            }

            if (LVI_GValue > 255) {
                LVI_GValue = 255;
            } else if (LVI_GValue < 0) {
                LVI_GValue = 0;
            }

            if (LVI_BValue > 255) {
                LVI_BValue = 255;
            } else if (LVI_BValue < 0) {
                LVI_BValue = 0;
            }

            bmp.setPixel(y, x, Color.rgb(LVI_RValue, LVI_GValue, LVI_RValue));

        }
    }
    return bmp;
}

public double GetDistXDist( int Point1X,int Point1Y, int Point2X,int Point2Y)
{
    double dist2 = (Math.pow((Point1X - Point2X), 2) + Math.pow((Point1Y - Point2Y), 2));
    return dist2;
}
 }

在我的代码中，我想改变图像的区域像素，该区域是两个圆圈的共同部分，

int startX,int startY ,int endX,int endY是两个圈子的中心，但是当我运行应用程序时， 它给了我

Caused by: java.lang.IllegalArgumentException: x must be < bitmap.width() 

我不知道如何调节？

编辑：

 public class SlimmingView extends View implements OnTouchListener {

Paint paint = new Paint();
Paint paint1 = new Paint();
Bitmap bitmap;

Bitmap rotatedBitmap,SlimmingBitmap;


private int mPosX;
private int mPosY;

int screenWidth, screenHeight;

 int bitWidth, bitHeight;


int radius;

boolean isShow=false;

public SlimmingView(Context context) {
    super(context);
    setFocusable(true);
    setFocusableInTouchMode(true);
    this.setOnTouchListener(this);

    PathEffect effects = new DashPathEffect(new float[] { 8, 8,8, 8 }, 1);
    paint.setPathEffect(effects);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(2);
    paint.setColor(Color.YELLOW);
    paint.setAntiAlias(true);


    paint1.setPathEffect(effects);
    paint1.setStyle(Paint.Style.STROKE);
    paint1.setStrokeWidth(2);
    paint1.setColor(Color.BLUE);
    paint1.setAntiAlias(true);
    radius = 20;
    bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv);


}

@Override
public boolean onTouch(View v, MotionEvent event) {



    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN: {
        isShow=true;

        SlimmingBitmap=Slimming(bitmap,155, 235,165, 245, radius, 0.2f);
        invalidate();

        break;
    }

    case MotionEvent.ACTION_MOVE: {
        break;
    }

    case MotionEvent.ACTION_UP: {

        break;
    }

    case MotionEvent.ACTION_CANCEL: {

        break;
    }

    }

    return true;

}

@Override
protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    if(isShow)
       {canvas.drawBitmap(SlimmingBitmap, 0, 0, null);}
    canvas.drawCircle(155, 235, radius, paint);
    canvas.drawCircle(165, 245, radius, paint1);
}

public Bitmap Slimming(Bitmap bmp,int startX,int startY ,int endX,int endY,int radius,float power)
{
    //int height = bmp.getHeight();
//  int width= bmp.getWidth();

//  Bitmap bmpSephia = Bitmap.createBitmap(width, height,bmp.getConfig());
//  Canvas canvas = new Canvas(bmpSephia);

//  canvas.drawBitmap(bmp, 0, 0, null);
    for (int x = endX + radius; x > endX - radius && x > 0; x--)
    {
        for (int y = endY + radius; y > endY - radius && y > 0; y--)
        {
            if (x > bmp.getWidth() || y > bmp.getHeight())
            {
                continue;
            }

            if (Math.pow((x - endX), 2) + Math.pow((y -endY), 2) > Math.pow(radius, 2))
            {
                // not in the cic
                continue;
            }

            double LVF_Modulus = 1 - GetDistXDist(x,y, startX,startY) / (radius * radius);
            LVF_Modulus = LVF_Modulus * LVF_Modulus *  LVF_Modulus;

            LVF_Modulus = LVF_Modulus * power;

            double LVF_XPos = x - LVF_Modulus * (endX - startX);
            double LVF_YPos = y - LVF_Modulus * (endY - startY);

            long LVI_XPos1 = (long) (LVF_XPos);
            long LVI_XPos2 = LVI_XPos1 + 1;
            long LVI_YPos1 = (long)(LVF_YPos);
            long LVI_YPos2 = LVI_YPos1 + 1;

            if (LVI_XPos1 >= bmp.getWidth() ||
                    LVI_YPos1 >= bmp.getHeight() ||
                    LVI_XPos2 >= bmp.getWidth() ||
                    LVI_YPos2 >= bmp.getHeight() ||
                    LVI_XPos1 < 0 ||
                    LVI_YPos1 < 0 ||
                    LVI_XPos2 < 0 ||
                    LVI_YPos2 < 0 )
                {
                    continue;
                }


            int LVI_RValue = 0;
            int LVI_GValue = 0;
            int LVI_BValue = 0;
             double temp1 = 0;
             double temp2 = 0;

            int c = bmp.getPixel((int)LVI_YPos1, (int)LVI_XPos1);
                // a= Color.alpha(c);
                int red = Color.red(c);
                int green = Color.green(c);
                int blue = Color.blue(c);

            int c1 = bmp.getPixel((int)LVI_YPos1, (int)LVI_XPos2);  
            int red1 = Color.red(c1);
            int green1 = Color.green(c1);
            int blue1 = Color.blue(c1);

            int c2 = bmp.getPixel((int)LVI_YPos2, (int)LVI_XPos1);  
            int red2 = Color.red(c2);
            int green2 = Color.green(c2);
            int blue2 = Color.blue(c2);


            int c3 = bmp.getPixel((int)LVI_YPos2, (int)LVI_XPos2);  
            int red3 = Color.red(c3);
            int green3 = Color.green(c3);
            int blue3 = Color.blue(c3);

            temp1 = (red + (LVF_XPos - LVI_XPos1)*(red1 - red));
            temp2 = (red2 + (LVF_XPos - LVI_XPos1)*(red3 - red2));
            LVI_RValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (green + (LVF_XPos - LVI_XPos1)*(green1 - green));
            temp2 = (green2 + (LVF_XPos - LVI_XPos1)*(green3 - green2));
            LVI_GValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (blue + (LVF_XPos - LVI_XPos1)*(blue1 - blue));
            temp2 = (blue2 + (LVF_XPos - LVI_XPos1)*(blue3 - blue2));
            LVI_BValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            if (LVI_RValue> 255) {
                LVI_RValue = 255;
            } else if (LVI_RValue < 0) {
                LVI_RValue = 0;
            }

            if (LVI_GValue > 255) {
                LVI_GValue = 255;
            } else if (LVI_GValue < 0) {
                LVI_GValue = 0;
            }

            if (LVI_BValue > 255) {
                LVI_BValue = 255;
            } else if (LVI_BValue < 0) {
                LVI_BValue = 0;
            }

            bmp.setPixel(y, x, Color.rgb(LVI_RValue, LVI_GValue, LVI_RValue));

        }
    }
    return bmp;
}

public double GetDistXDist( int Point1X,int Point1Y, int Point2X,int Point2Y)
{
    double dist2 = (Math.pow((Point1X - Point2X), 2) + Math.pow((Point1Y - Point2Y), 2));
    return dist2;
}

}

Answer 1

在onMeasure（）（或onLayout（）之后，您的自定义视图将不会“知道”其大小，并且也可能在onSizeChanged（）中更改。您需要在这些内部获取View维度，而不是在构造函数中。

Answer 2

修改方法确定

public Bitmap Slimming(Bitmap bmp,int startX,int startY ,int endX,int endY,int radius,float power)
{
    //int height = bmp.getHeight();
//  int width= bmp.getWidth();

//  Bitmap bmpSephia = Bitmap.createBitmap(width, height,bmp.getConfig());
//  Canvas canvas = new Canvas(bmpSephia);

//  canvas.drawBitmap(bmp, 0, 0, null);
    for (int x = endX + radius; x > endX - radius && x > 0; x--)
    {
        for (int y = endY + radius; y > endY - radius && y > 0; y--)
        {
            if (x > bmp.getWidth() || y > bmp.getHeight())
            {
                continue;
            }

            if (Math.pow((x - endX), 2) + Math.pow((y -endY), 2) > Math.pow(radius, 2))
            {
                // not in the cic
                continue;
            }

            double LVF_Modulus = 1 - GetDistXDist(x,y, startX,startY) / (radius * radius);
            LVF_Modulus = LVF_Modulus * LVF_Modulus *  LVF_Modulus;

            LVF_Modulus = LVF_Modulus * power;

            double LVF_XPos = x - LVF_Modulus * (endX - startX);
            double LVF_YPos = y - LVF_Modulus * (endY - startY);

            int LVI_XPos1 = (int)(LVF_XPos);
            int LVI_XPos2 = LVI_XPos1 + 1;
            int LVI_YPos1 = (int)(LVF_YPos);
            int LVI_YPos2 = LVI_YPos1 + 1;

            if (LVI_XPos1 >= bmp.getWidth() ||
                    LVI_YPos1 >= bmp.getHeight() ||
                    LVI_XPos2 >= bmp.getWidth() ||
                    LVI_YPos2 >= bmp.getHeight() ||
                    LVI_XPos1 < 0 ||
                    LVI_YPos1 < 0 ||
                    LVI_XPos2 < 0 ||
                    LVI_YPos2 < 0 )
                {
                    continue;
                }


            int LVI_RValue = 0;
            int LVI_GValue = 0;
            int LVI_BValue = 0;
             double temp1 = 0;
             double temp2 = 0;

            int c = bmp.getPixel((int)LVI_XPos1, (int)LVI_YPos1);
                // a= Color.alpha(c);
                int red = Color.red(c);
                int green = Color.green(c);
                int blue = Color.blue(c);

            int c1 = bmp.getPixel((int)LVI_XPos1, (int)LVI_YPos2);  
            int red1 = Color.red(c1);
            int green1 = Color.green(c1);
            int blue1 = Color.blue(c1);

            int c2 = bmp.getPixel((int)LVI_XPos2, (int)LVI_YPos1);  
            int red2 = Color.red(c2);
            int green2 = Color.green(c2);
            int blue2 = Color.blue(c2);


            int c3 = bmp.getPixel((int)LVI_XPos2, (int)LVI_YPos2);  
            int red3 = Color.red(c3);
            int green3 = Color.green(c3);
            int blue3 = Color.blue(c3);

            temp1 = (red + (LVF_XPos - LVI_XPos1)*(red1 - red));
            temp2 = (red2 + (LVF_XPos - LVI_XPos1)*(red3 - red2));
            LVI_RValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (green + (LVF_XPos - LVI_XPos1)*(green1 - green));
            temp2 = (green2 + (LVF_XPos - LVI_XPos1)*(green3 - green2));
            LVI_GValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            temp1 = (blue + (LVF_XPos - LVI_XPos1)*(blue1 - blue));
            temp2 = (blue2 + (LVF_XPos - LVI_XPos1)*(blue3 - blue2));
            LVI_BValue = (int)(temp1 + (LVF_YPos - LVI_YPos1)*(temp2 - temp1));

            if (LVI_RValue> 255) {
                LVI_RValue = 255;
            } else if (LVI_RValue < 0) {
                LVI_RValue = 0;
            }

            if (LVI_GValue > 255) {
                LVI_GValue = 255;
            } else if (LVI_GValue < 0) {
                LVI_GValue = 0;
            }

            if (LVI_BValue > 255) {
                LVI_BValue = 255;
            } else if (LVI_BValue < 0) {
                LVI_BValue = 0;
            }

            bmp.setPixel(y, x, Color.rgb(LVI_RValue, LVI_GValue, LVI_RValue));

        }
    }
    return bmp;
}