Java Code Examples for android.support.v7.widget.StaggeredGridLayoutManager#findLastVisibleItemPositions()
The following examples show how to use
android.support.v7.widget.StaggeredGridLayoutManager#findLastVisibleItemPositions() .
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Example 1
| Source File: ViewUtils.java From VideoMeeting with Apache License 2.0 | 6 votes |
|
public static int getLastVisiblePosition(RecyclerView recyclerView) {
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
int position;
if (manager instanceof GridLayoutManager) {
position = ((GridLayoutManager) manager).findLastVisibleItemPosition();
} else if (manager instanceof LinearLayoutManager) {
position = ((LinearLayoutManager) manager).findLastVisibleItemPosition();
} else if (manager instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) manager;
int[] lastPositions = layoutManager.findLastVisibleItemPositions(new int[layoutManager.getSpanCount()]);
position = getMaxPosition(lastPositions);
} else {
position = manager.getItemCount() - 1;
}
return position;
}
Example 2
| Source File: LoadMoreRecyclerView.java From LoadMoreRecyclerView with Apache License 2.0 | 6 votes |
|
/**
* 获取最后一条展示的位置
*
* @return
*/
private int getLastVisiblePosition() {
int position;
if (getLayoutManager() instanceof LinearLayoutManager) {
position = ((LinearLayoutManager) getLayoutManager()).findLastVisibleItemPosition();
} else if (getLayoutManager() instanceof GridLayoutManager) {
position = ((GridLayoutManager) getLayoutManager()).findLastVisibleItemPosition();
} else if (getLayoutManager() instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) getLayoutManager();
int[] lastPositions = layoutManager.findLastVisibleItemPositions(new int[layoutManager.getSpanCount()]);
position = getMaxPosition(lastPositions);
} else {
position = getLayoutManager().getItemCount() - 1;
}
return position;
}
Example 3
| Source File: CommonRecyclerView.java From TigerVideo with Apache License 2.0 | 6 votes |
|
/**
* 获取最后一条展示的位置
*
* @return
*/
public int getLastVisiblePosition() {
int position;
if (getLayoutManager() instanceof LinearLayoutManager) {
position = ((LinearLayoutManager) getLayoutManager()).findLastVisibleItemPosition();
} else if (getLayoutManager() instanceof GridLayoutManager) {
position = ((GridLayoutManager) getLayoutManager()).findLastVisibleItemPosition();
} else if (getLayoutManager() instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) getLayoutManager();
int[] lastPositions = layoutManager.findLastVisibleItemPositions(new int[layoutManager.getSpanCount()]);
position = getMaxPosition(lastPositions);
} else {
position = getLayoutManager().getItemCount() - 1;
}
return position;
}
Example 4
| Source File: OnRecyclerViewScrollListener.java From HeaderFooterRecyclerView with Apache License 2.0 | 6 votes |
|
/**
* 计算第一个元素的位置
*/
private int calculateFirstVisibleItemPos(RecyclerView.LayoutManager layoutManager, int firstVisibleItemPosition) {
switch (mLayoutManagerType) {
case LINEAR:
mLastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
firstVisibleItemPosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
break;
case GRID:
mLastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
firstVisibleItemPosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (mLastPositions == null) {
mLastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
mLastPositions = staggeredGridLayoutManager.findLastVisibleItemPositions(mLastPositions);
mLastVisibleItemPosition = findMax(mLastPositions);
staggeredGridLayoutManager.findFirstCompletelyVisibleItemPositions(mLastPositions);
firstVisibleItemPosition = findMax(mLastPositions);
break;
}
return firstVisibleItemPosition;
}
Example 5
| Source File: BasePullUpRecyclerAdapter.java From RecyclerViewDemo with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = STAGGERED_GRID;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are " +
"LinearLayoutManager, GridLayoutManager and " +
"StaggeredGridLayoutManager");
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItem = ((LinearLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case GRID:
lastVisibleItem = ((GridLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager
= (StaggeredGridLayoutManager) layoutManager;
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItem = findMax(lastPositions);
break;
}
}
Example 6
| Source File: EndlessRecyclerOnScrollListener.java From HeaderFooterRecyclerView with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LinearLayout;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GridLayout;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.StaggeredGridLayout;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LinearLayout:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GridLayout:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case StaggeredGridLayout:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 7
| Source File: EndlessRecyclerOnScrollListener.java From HeaderAndFooterRecyclerView with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManagerType == null) {
if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GridLayout;
} else if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LinearLayout;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.StaggeredGridLayout;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LinearLayout:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GridLayout:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case StaggeredGridLayout:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 8
| Source File: DRecyclerViewScrollListener.java From Pas with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LinearLayout;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GridLayout;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.StaggeredGridLayout;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LinearLayout:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GridLayout:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case StaggeredGridLayout:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 9
| Source File: BasePullUpRecyclerAdapter.java From CoreModule with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = STAGGERED_GRID;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are " +
"LinearLayoutManager, GridLayoutManager and " +
"StaggeredGridLayoutManager");
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItem = ((LinearLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case GRID:
lastVisibleItem = ((GridLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager
= (StaggeredGridLayoutManager) layoutManager;
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItem = findMax(lastPositions);
break;
}
}
Example 10
| Source File: EndlessScrollListener.java From photosearcher with Apache License 2.0 | 5 votes |
|
public boolean shouldLoadNext(@NonNull StaggeredGridLayoutManager manager) {
int lastItemPosition = manager.getItemCount() - 1;
int[] lastVisibleItemPositions = manager.findLastVisibleItemPositions(null);
if (lastVisibleItemPositions.length == 0) {
return true;
}
int lastVisibleItemPosition = lastVisibleItemPositions[lastVisibleItemPositions.length - 1];
return (lastItemPosition < lastVisibleItemPosition + getLoadingTriggerOffsetSize());
}
Example 11
| Source File: XRecyclerView.java From ARecyclerView with MIT License | 5 votes |
|
private int getFirstVisibleItemPosition(RecyclerView.LayoutManager layoutManager) {
int firstVisibleItemPosition = -1;
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.STAGGERED_GRID;
} else {
throw new RuntimeException("Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LINEAR:
firstVisibleItemPosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
break;
case GRID:
firstVisibleItemPosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastScrollPositions == null)
lastScrollPositions = new int[staggeredGridLayoutManager.getSpanCount()];
staggeredGridLayoutManager.findLastVisibleItemPositions(firstScrollPositions);
firstVisibleItemPosition = findMin(firstScrollPositions);
break;
}
return firstVisibleItemPosition;
}
Example 12
| Source File: EasyRefreshLayout.java From EasyRefreshLayout with Apache License 2.0 | 5 votes |
|
/**
* 最后一个的位置
*/
private int getLastVisiBleItem() {
RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();
int lastVisibleItemPosition = -1;
int layoutManagerType = 0;
if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = 1;
} else if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = 0;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = 2;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
switch (layoutManagerType) {
case 0:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case 1:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case 2:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
int[] lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
return lastVisibleItemPosition;
}
Example 13
| Source File: EndlessRecyclerOnScrollListener.java From CoordinatorLayoutExample with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LinearLayout;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GridLayout;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.StaggeredGridLayout;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LinearLayout:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GridLayout:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case StaggeredGridLayout:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 14
| Source File: LoadMoreRecyclerView.java From ZhiHu-TopAnswer with Apache License 2.0 | 5 votes |
|
@Override
public void onScrolled(int dx, int dy) {
super.onScrolled(dx, dy);
LayoutManager layoutManager = getLayoutManager(); //拿到layoutmanager用来判断类型，拿到最后一个可见的view
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
} else {
throw new RuntimeException(
"不支持的LayoutManager ,目前只支持 LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
/**
* 拿到最后一个可见的view
*/
switch (layoutManagerType) {
case LINEAR:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GRID:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 15
| Source File: RecyclerViewScrollListener.java From Social with Apache License 2.0 | 4 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
Log.d(TAG, "onScrolled: dy = " + dy);
/**
* 获取布局参数
*/
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
//如果为null，第一次运行，确定布局类型
if (mLayoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
mLayoutManagerType = LayoutManagerType.LINEAR_LAYOUT;
} else if (layoutManager instanceof GridLayoutManager) {
mLayoutManagerType = LayoutManagerType.GRID_LAYOUT;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
mLayoutManagerType = LayoutManagerType.STAGGERED_GRID_LAYOUT;
} else {
throw new RuntimeException("LayoutManager should be LinearLayoutManager,GridLayoutManager,StaggeredGridLayoutManager");
}
}
//对于不太能够的布局参数，不同的方法获取到当前显示的最后一个条目数
switch (mLayoutManagerType) {
case LINEAR_LAYOUT:
mLastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GRID_LAYOUT:
mLastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
int firstItemPosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();
Log.d(TAG, "onScrolled: firstPosition = " + firstItemPosition);
break;
case STAGGERED_GRID_LAYOUT:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (mLastPostions == null) {
mLastPostions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(mLastPostions);
mLastVisibleItemPosition = findMax(mLastPostions);
break;
default:
break;
}
}
Example 16
| Source File: WXRecyclerViewOnScrollListener.java From weex-uikit with MIT License | 4 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
listener.get().onBeforeScroll(dx,dy);
// int lastVisibleItemPosition = -1;
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager)
.findLastVisibleItemPosition();
listener.get().notifyAppearStateChange(((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition()
,lastVisibleItemPosition
,dx
,dy);
break;
case GRID:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager
= (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 17
| Source File: LuRecyclerView.java From LRecyclerView with Apache License 2.0 | 4 votes |
|
@Override
public void onScrolled(int dx, int dy) {
super.onScrolled(dx, dy);
int firstVisibleItemPosition = 0;
RecyclerView.LayoutManager layoutManager = getLayoutManager();
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LayoutManagerType.LinearLayout;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LayoutManagerType.GridLayout;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LayoutManagerType.StaggeredGridLayout;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LinearLayout:
firstVisibleItemPosition = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition();
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GridLayout:
firstVisibleItemPosition = ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition();
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case StaggeredGridLayout:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
staggeredGridLayoutManager.findFirstCompletelyVisibleItemPositions(lastPositions);
firstVisibleItemPosition = findMax(lastPositions);
break;
default:
break;
}
// 根据类型来计算出第一个可见的item的位置，由此判断是否触发到底部的监听器
// 计算并判断当前是向上滑动还是向下滑动
calculateScrollUpOrDown(firstVisibleItemPosition, dy);
// 移动距离超过一定的范围，我们监听就没有啥实际的意义了
mScrolledXDistance += dx;
mScrolledYDistance += dy;
mScrolledXDistance = (mScrolledXDistance < 0) ? 0 : mScrolledXDistance;
mScrolledYDistance = (mScrolledYDistance < 0) ? 0 : mScrolledYDistance;
if (mIsScrollDown && (dy == 0)) {
mScrolledYDistance = 0;
}
//Be careful in here
if (null != mLScrollListener) {
mLScrollListener.onScrolled(mScrolledXDistance, mScrolledYDistance);
}
//如果想要滑动到底部自动加载更多，mIsManualLoadMore必须为false
if (mIsManualLoadMore) {
if (!isNoMore) {
Log.e("lzx","onScrooo set visible");
mLoadingData = true;
mLoadMoreFooter.setOnClickLoadMoreListener(mLoadMoreListener);
}
} else {
if (mLoadMoreListener != null && mLoadMoreEnabled) {
int visibleItemCount = layoutManager.getChildCount();
int totalItemCount = layoutManager.getItemCount();
if (visibleItemCount > 0
&& lastVisibleItemPosition >= totalItemCount - 1
&& (isCritical ? totalItemCount >= visibleItemCount : totalItemCount > visibleItemCount)
&& !isNoMore
&& !mRefreshing) {
mFootView.setVisibility(View.VISIBLE);
if (!mLoadingData) {
mLoadingData = true;
mLoadMoreFooter.onLoading();
mLoadMoreListener.onLoadMore();
}
}
}
}
}
Example 18
| Source File: RecyclerViewLoadHelper.java From GankMeizhi with Apache License 2.0 | 4 votes |
|
public static boolean isToBottom(RecyclerView recyclerView) {
int lastVisibleItemPosition = -1;
int[] lastPositions;
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (null != layoutManager) {
LAYOUT_MANAGER_TYPE layoutManagerType;
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
} else {
throw new ClassCastException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case GRID:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
int visibleItemCount = layoutManager.getChildCount();
int totalItemCount = layoutManager.getItemCount();
if ((visibleItemCount > 0 && (lastVisibleItemPosition) >= totalItemCount - 1)) {
//到达最后
return true;
}
}
return false;
}
Example 19
| Source File: WXRecyclerViewOnScrollListener.java From weex with Apache License 2.0 | 4 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
// int lastVisibleItemPosition = -1;
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager)
.findLastVisibleItemPosition();
listener.get().notifyAppearStateChange(((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition()
,lastVisibleItemPosition
,dx
,dy);
break;
case GRID:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager
= (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
}
Example 20
| Source File: OnRVLoadMoreScrollListener.java From RecyclerViewAdapter with Apache License 2.0 | 4 votes |
|
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
// int lastVisibleItemPosition = -1;
if (layoutManagerType == null) {
if (layoutManager instanceof LinearLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.LINEAR;
} else if (layoutManager instanceof GridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.GRID;
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
layoutManagerType = LAYOUT_MANAGER_TYPE.STAGGERED_GRID;
} else {
throw new RuntimeException(
"Unsupported LayoutManager used. Valid ones are LinearLayoutManager, GridLayoutManager and StaggeredGridLayoutManager");
}
}
switch (layoutManagerType) {
case LINEAR:
lastVisibleItemPosition = ((LinearLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case GRID:
lastVisibleItemPosition = ((GridLayoutManager) layoutManager)
.findLastVisibleItemPosition();
break;
case STAGGERED_GRID:
StaggeredGridLayoutManager staggeredGridLayoutManager
= (StaggeredGridLayoutManager) layoutManager;
if (lastPositions == null) {
lastPositions = new int[staggeredGridLayoutManager.getSpanCount()];
}
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItemPosition = findMax(lastPositions);
break;
}
// if (!recyclerView.canScrollVertically(-1)) {
// onScrolledToTop();
// } else if (!recyclerView.canScrollVertically(1)) {
// onScrolledToBottom();
// } else if (dy < 0) {
// onScrolledUp();
// } else if (dy > 0) {
// onScrolledDown();
// }
}
