DrawShadowFrameLayout.java 文件源码

public DrawShadowFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    final TypedArray a = context.obtainStyledAttributes(attrs,
            R.styleable.DrawShadowFrameLayout, 0, 0);

    mShadowDrawable = a.getDrawable(R.styleable.DrawShadowFrameLayout_shadowDrawable);
    if (mShadowDrawable != null) {
        mShadowDrawable.setCallback(this);
        if (mShadowDrawable instanceof NinePatchDrawable) {
            mShadowNinePatchDrawable = (NinePatchDrawable) mShadowDrawable;
        }
    }

    mShadowVisible = a.getBoolean(R.styleable.DrawShadowFrameLayout_shadowVisible, true);
    setWillNotDraw(!mShadowVisible || mShadowDrawable == null);

    a.recycle();
}