bitmap&bitmapdrawable的问题

BitmapDrawable localBitmapDrawable = new BitmapDrawable(paramBitmap);

原本的density

引用

paramBitmap240

变成了

引用

localBitmapDrawable 160

lookit

    /**
     * Create drawable from a bitmap, setting initial target density based on
     * the display metrics of the resources.
     */
    public BitmapDrawable(Resources res, Bitmap bitmap) {
        this(new BitmapState(bitmap), res);
        mBitmapState.mTargetDensity = mTargetDensity;
    }

纠结了好多天了！