android如何判断view滑动底部,判断RecyclerView滑动到底部和顶部
方法1mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {@Overridepublic void onScrolled(RecyclerView recyclerView, int dx, int dy) {super.onScrolled(recyclerView, dx, dy);Log.i(TAG,
方法1
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
Log.i(TAG, "--------------------------------------");
if(mRecyclerView.canScrollVertically(1)){
Log.i(TAG, "direction 1: true");
}else {
Log.i(TAG, "direction 1: false");//滑动到底部
}
if(mRecyclerView.canScrollVertically(-1)){
Log.i(TAG, "direction -1: true");
}else {
Log.i(TAG, "direction -1: false");//滑动到顶部
}
}
});
方法2
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
Log.i(TAG, "--------------------------------------");
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
int firstCompletelyVisibleItemPosition = layoutManager.findFirstCompletelyVisibleItemPosition();
Log.i(TAG, "firstCompletelyVisibleItemPosition: "+firstCompletelyVisibleItemPosition);
if(firstCompletelyVisibleItemPosition==0)
Log.i(TAG, "滑动到顶部");
int lastCompletelyVisibleItemPosition = layoutManager.findLastCompletelyVisibleItemPosition();
Log.i(TAG, "lastCompletelyVisibleItemPosition: "+lastCompletelyVisibleItemPosition);
if(lastCompletelyVisibleItemPosition==layoutManager.getItemCount()-1)
Log.i(TAG, "滑动到底部");
}
});
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