Android - Canvas drawLine在ImageView中

Question

我有一个ImageView,我想画一条线.我做了以下事情:

mImagenCampo = (ImageView) findViewById(R.id.imagen_campo); 

crearPunto(mArea9M, mPaloIzq,v.getWidth(), mPaloIzq,Color.WHITE);

功能是:

private void crearPunto(float x, float y, float xend, float yend, int color) {

    BitmapDrawable bmpDraw = (BitmapDrawable) mImagenCampo.getDrawable();
    Bitmap bmp = bmpDraw.getBitmap().copy(Config.RGB_565, true);
    Canvas c = new Canvas(bmp);
    Paint p = new Paint();
    p.setColor(color);
    c.drawLine(x, y, xend, yend, p);
    mImagenCampo.setImageBitmap(bmp);

}

我的问题是画线,但它没有得到权利坐标.它比它应该是小的.

谢谢

编辑:我忘了说mImagenCampo是一个ImageView

Answer 1

试试这个:

private void crearPunto(float x, float y, float xend, float yend, int color) {

    bmp = Bitmap.createBitmap(mImagenCampo.getWidth(), mImagenCampo.getHeight(), Config.ARGB_8888);
    c = new Canvas(bmp);
        mImagenCampo.draw(c);

    Paint p = new Paint();
    p.setColor(color);
    c.drawLine(x, y, xend, yend, p);
    mImagenCampo.setImageBitmap(bmp);
}