private void Initialize()
{
Element.Circle_r = DensityUtil.Dp2px(Context, 3f);
Element.Circle_R = DensityUtil.Dp2px(Context, 20f);
Element.Distance = DensityUtil.Dp2px(Context, 40f);
var Length = 3 * Element.Circle_R * 2 + Element.Distance * 2;
int MyWidth = DensityUtil.Dp2px(Context, (float)Element.WidthRequest);
int MyPadding = (int)((MyWidth - Length) / 2);
Element.X_Zero = MyPadding + Element.Circle_R;
Element.Y_Zero = MyPadding + Element.Circle_R;
paint = new Paint();
SetOnTouchListener(this);
Element.InitPointList();
PostInvalidate();
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_practice_weibo);
mToolbar = FindViewById <Toolbar>(Resource.Id.toolbar);
mToolbar.NavigationClick += (sender, e) => { Finish(); };
//状态栏透明和间距处理
StatusBarUtil.immersive(this);
StatusBarUtil.setPaddingSmart(this, mToolbar);
parallax = FindViewById(Resource.Id.parallax);
var buttonBar = FindViewById(Resource.Id.buttonBarLayout);
var scrollView = FindViewById <NestedScrollView>(Resource.Id.scrollView);
var refreshLayout = FindViewById(Resource.Id.refreshLayout) as IRefreshLayout;
refreshLayout.SetOnMultiPurposeListener(new CustomSimpleMultiPurposeListener(this));
int lastScrollY = 0;
int h = DensityUtil.Dp2px(170);
int color = ContextCompat.GetColor(ApplicationContext, Resource.Color.colorPrimary) & 0x00ffffff;
scrollView.ScrollChange += (sender, e) => {
var scrollX = e.ScrollX;
var scrollY = e.ScrollY;
if (lastScrollY < h)
{
scrollY = Math.Min(h, scrollY);
mScrollY = scrollY > h ? h : scrollY;
buttonBar.Alpha = 1f * mScrollY / h;
mToolbar.SetBackgroundColor(new Android.Graphics.Color(((255 * mScrollY / h) << 24) | color));
parallax.TranslationY = mOffset - mScrollY;
}
lastScrollY = scrollY;
};
buttonBar.Alpha = 0;
mToolbar.SetBackgroundColor(new Android.Graphics.Color(0));
}
public int Dp2Px(int value)
{
return(DensityUtil.Dp2px(Android.App.Application.Context, value));
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_fly_refresh);
toolbar = FindViewById <Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
toolbar.NavigationClick += (sender, e) => { Finish(); };
/************************************************************
* 关键代码-开始
************************************************************/
mFlyView = FindViewById <FlyView>(Resource.Id.flyview);
mScenceView = FindViewById <MountanScenceView>(Resource.Id.mountan);
mFlyRefreshHeader = FindViewById <FlyRefreshHeader>(Resource.Id.flyrefresh);
mFlyRefreshHeader.SetUp(mScenceView, mFlyView); //绑定场景和纸飞机
mRefreshLayout = FindViewById(Resource.Id.refreshLayout) as IRefreshLayout;
mRefreshLayout.SetReboundInterpolator(new ElasticOutInterpolator()); //设置回弹插值器，会带有弹簧震动效果
mRefreshLayout.SetReboundDuration(800); //设置回弹动画时长
mRefreshLayout.SetOnRefreshListener(new CustomOnRefreshListener(this));
//设置 让 AppBarLayout 和 RefreshLayout 的滚动同步 并不保持 toolbar 位置不变
appBar = FindViewById <AppBarLayout>(Resource.Id.app_bar);
mRefreshLayout.SetOnMultiPurposeListener(new CustomOnMultiPurposeListener(this));
/************************************************************
* 关键代码-结束
************************************************************/
mRefreshLayout = FindViewById(Resource.Id.refreshLayout) as IRefreshLayout;
if (isFirstEnter)
{
isFirstEnter = false;
mRefreshLayout.AutoRefresh();//第一次进入触发自动刷新，演示效果
}
/**
* 初始化列表数据
*/
initDataSet();
mAdapter = new ItemAdapter(this);
mLayoutManager = new LinearLayoutManager(this);
mListView = FindViewById <RecyclerView>(Resource.Id.recyclerView);
mListView.SetLayoutManager(mLayoutManager);
mListView.SetAdapter(mAdapter);
mListView.SetItemAnimator(new SampleItemAnimator());
mToolbarLayout = FindViewById <CollapsingToolbarLayout>(Resource.Id.toolbar_layout);
mActionButton = FindViewById <FloatingActionButton>(Resource.Id.fab);
//设置点击 ActionButton 时候触发自动刷新 并改变主题颜色
mActionButton.Click += (sender, e) => {
updateTheme();
mRefreshLayout.AutoRefresh();
};
// 监听 AppBarLayout 的关闭和开启 给 FlyView（纸飞机） 和 ActionButton 设置关闭隐藏动画
appBar.OffsetChanged += (sender, e) => {
var appBarLayout = e.AppBarLayout;
var verticalOffset = e.VerticalOffset;
int scrollRange = appBarLayout.TotalScrollRange;
float fraction = 1f * (scrollRange + verticalOffset) / scrollRange;
if (fraction < 0.1 && misAppbarExpand)
{
misAppbarExpand = false;
mActionButton.Animate().ScaleX(0).ScaleY(0);
mFlyView.Animate().ScaleX(0).ScaleY(0);
ValueAnimator animator = ValueAnimator.OfInt(mListView.PaddingTop, 0);
animator.SetDuration(300);
animator.Update += (senderr, ee) => {
mListView.SetPadding(0, (int)ee.Animation.AnimatedValue, 0, 0);
};
animator.Start();
}
if (fraction > 0.8 && !misAppbarExpand)
{
misAppbarExpand = true;
mActionButton.Animate().ScaleX(1).ScaleY(1);
mFlyView.Animate().ScaleX(1).ScaleY(1);
ValueAnimator animator = ValueAnimator.OfInt(mListView.PaddingTop, DensityUtil.Dp2px(25));
animator.SetDuration(300);
animator.Update += (senderr, ee) => {
mListView.SetPadding(0, (int)ee.Animation.AnimatedValue, 0, 0);
};
animator.Start();
}
};
//状态栏透明和间距处理
StatusBarUtil.immersive(this);
StatusBarUtil.setPaddingSmart(this, toolbar);
// StatusBarUtil.setPaddingSmart(this, findViewById(R.id.profile));
// StatusBarUtil.setPaddingSmart(this, findViewById(R.id.blurview));
}