@SuppressLint("NewApi")
 private void setUp(final double diameter) {
   PtrLocalDisplay.init(mParent.getContext());
   final int shadowYOffset = PtrLocalDisplay.dp2px(Y_OFFSET);
   final int shadowXOffset = PtrLocalDisplay.dp2px(X_OFFSET);
   int mShadowRadius = PtrLocalDisplay.dp2px(SHADOW_RADIUS);
   OvalShape oval = new OvalShadow(mShadowRadius, (int) diameter);
   mShadow = new ShapeDrawable(oval);
   if (Build.VERSION.SDK_INT >= 11) {
     mParent.setLayerType(View.LAYER_TYPE_SOFTWARE, mShadow.getPaint());
   }
   mShadow
       .getPaint()
       .setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset, KEY_SHADOW_COLOR);
 }
  private void initiateDimens() {
    PtrLocalDisplay.init(mContext);
    // 拖动总距离
    mTotalDragDistance = PtrLocalDisplay.dp2px(120);
    // 屏幕宽度
    mScreenWidth = getContext().getResources().getDisplayMetrics().widthPixels;
    // 0.65 * 屏幕宽度
    mSkyHeight = (int) (SKY_RATIO * mScreenWidth);
    // 天空向上偏移量
    mSkyTopOffset = -(mSkyHeight * 0.28f);
    // 移动偏移量
    mSkyMoveOffset = PtrLocalDisplay.designedDP2px(15);
    // 0.22 * 屏幕宽度
    mTownHeight = (int) (TOWN_RATIO * mScreenWidth);
    // 初始偏移
    mTownInitialTopOffset =
        (mTotalDragDistance - mTownHeight * TOWN_INITIAL_SCALE) + mTotalDragDistance * .42f;
    mTownFinalTopOffset =
        (mTotalDragDistance - mTownHeight * TOWN_FINAL_SCALE) + mTotalDragDistance * .42f;
    // 建筑移动偏移
    mTownMoveOffset = PtrLocalDisplay.designedDP2px(10);

    mSunLeftOffset = 0.3f * (float) mScreenWidth;
    mSunTopOffset = (mTotalDragDistance * 0.5f);

    mTop = 0;
  }