Zoom in doesn't check trans.

[Sacrify]

I guess there is a reset image trans after Zoom in:
/**
* 重置图片位置
* */
float dx = 0;
float dy = 0;
float width = getWidth();
float height = getHeight();
mCurrentMatrix.set(getImageMatrix());//初始化Matrix
float[] values = new float[9];
mCurrentMatrix.getValues(values);

        if (values[Matrix.MTRANS_X] > 0) {
            dx = -values[Matrix.MTRANS_X];
        } else if (values[Matrix.MTRANS_X] < -(mImageWidth * values[Matrix.MSCALE_X] - width)) {
            dx = -(mImageWidth * values[Matrix.MSCALE_X] - width) - values[Matrix.MTRANS_X];
        }

        if (values[Matrix.MTRANS_Y] > 0) {
            dy = -values[Matrix.MTRANS_Y];
        } else if (values[Matrix.MTRANS_Y] < -(mImageHeight * values[Matrix.MSCALE_Y] - height)) {
            dy = -(mImageHeight * values[Matrix.MSCALE_Y] - height) - values[Matrix.MTRANS_Y];
        }

        mCurrentMatrix.postTranslate(dx, dy);
        setImageMatrix(mCurrentMatrix);

Doing this is for reset picture trans which out of bounds during zoom in.