Android's drop-down refresh, pull-up loading function, displays the content from page 1 to the current page when turning page, and the content of the current page is currently displayed;
: Page Turning Control
public class PullRefreshRecyclerView extends LinearLayout implements , {
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView recyclerView;
private LinearLayout footerView;
private OnPullRefreshListener listener;
//Is it refreshing? private boolean isRefreshing = false;
//Is it loading private boolean isLoading = false;
//Is there more data private boolean hasMore = false;
public PullRefreshRecyclerView(Context context) {
this(context, null);
}
public PullRefreshRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
initListener();
init();
}
private void initView(Context context) {
(context).inflate(.pull_recycler_layout, this, true);
swipeRefreshLayout = findViewById();
recyclerView = findViewById();
footerView = findViewById();
}
private void initListener() {
(this);
(new PullableScroll());
//Prevent the view from sliding when scrolling (this);
}
private void init() {
(.holo_green_dark,
.holo_blue_dark,
.holo_orange_dark);
//Hide vertical scroll bar (true);
// When the item height is fixed, set this option to improve performance (true);
//Set item animation effect (new DefaultItemAnimator());
}
public void setHasFixedSize(boolean hasFixedSize) {
(hasFixedSize);
}
public void setItemAnimator( animator) {
(animator);
}
public void setLayoutManager( layout) {
(layout);
}
public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) {
(verticalScrollBarEnabled);
}
public void addItemDecoration( decor) {
(decor);
}
public void setAdapter( adapter) {
(adapter);
}
/**
* Settings listening for pull-down or pull-up events
*
* @param listener
*/
public void setOnPullRefreshListener(OnPullRefreshListener listener) {
= listener;
}
/**
* Set whether there is more data
*
* @param hasMore
*/
public void setHasMore(boolean hasMore) {
= hasMore;
}
/**
* Scroll to top
*/
public void scrollToTop() {
(0);
}
/**
* Refreshing
*/
@Override
public void onRefresh() {
isRefreshing = true;
if (listener != null) {
();
}
}
/**
* Set whether to allow pull-down
*
* @param enable
*/
public void setRefreshEnable(boolean enable) {
(enable);
}
/**
* Check whether it can be refreshed when scrolling
*
* @return
*/
private boolean isRefreshEnable() {
return !isRefreshing && !isLoading;
}
/**
* Loading more
*/
public void doLoadMore() {
if (!isLoading && hasMore && !isRefreshing) {
();
isLoading = true;
//Pull pull-down is prohibited setRefreshEnable(false);
if (listener != null) {
();
}
}
}
/**
* Refresh or loading is complete
*/
public void refreshOrLoadComplete() {
isRefreshing = false;
(false);
isLoading = false;
();
//Add to pull down (true);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return isRefreshing || isLoading;
}
public interface OnPullRefreshListener {
/**
* Refresh operation
*/
void onRefresh();
/**
* Loading operation
*/
void onLoadMore();
}
/**
* Listen to RecycleView slides the bottom or top
*/
class PullableScroll extends {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
(recyclerView, dx, dy);
int lastVisibleItem = 0;
int firstVisibleItem = 0;
layoutManager = ();
int totalItemCount = ();
if (layoutManager instanceof LinearLayoutManager) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
lastVisibleItem = ();
firstVisibleItem = ();
} else if (layoutManager instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager staggeredGridLayoutManager = (StaggeredGridLayoutManager) layoutManager;
// since may lead to the final item has more than one StaggeredGridLayoutManager the particularity of the so here that is an array
// this array into an array of position and then take the maximum value that is the last show the position value
int[] lastPositions = new int[((StaggeredGridLayoutManager) layoutManager).getSpanCount()];
(lastPositions);
lastVisibleItem = findMax(lastPositions);
firstVisibleItem = (lastPositions)[0];
}
pullRefreshEnable(firstVisibleItem, totalItemCount);
if (isSlideToBottom(recyclerView)) {
loadMore(dx, dy, lastVisibleItem, totalItemCount);
}
}
private int findMax(int[] lastPositions) {
int max = lastPositions[0];
for (int value : lastPositions) {
if (value > max) {
max = value;
}
}
return max;
}
}
/**
* Determine whether it slides to the bottom
*
* @param recyclerView
* @return
*/
public boolean isSlideToBottom(RecyclerView recyclerView) {
if (recyclerView == null) {
return false;
}
if (() + ()
>= ()) {
return true;
}
return false;
}
private void loadMore(int dx, int dy, int lastVisibleItem, int totalItemCount) {
//When scrolling to the bottom, more data can be loaded and loaded if (lastVisibleItem >= totalItemCount - 1 && (dx > 0 || dy > 0)) {
doLoadMore();
}
}
private void pullRefreshEnable(int firstVisibleItem, int totalItemCount) {
//Can be able to pull down and refresh when scrolling to the top if (firstVisibleItem == 0 || totalItemCount == 0) {
if (isRefreshEnable()) {
//Add to pull down setRefreshEnable(true);
}
} else {
//Pull pull-down is prohibited setRefreshEnable(false);
}
}
}
: Call
@Route(path = Page.ACTIVITY_PUNISH_LIST)
public class PunishListActivity extends BaseActivity implements , {
private static final String TAG = "PunishListActivity";
private List<PunishBean> punishBeans = new ArrayList<>();
private Context mContext;
private EditText et_punish_searchName;
private ImageView iv_search;
private PullRefreshRecyclerView prr_punish;
private String officeName = "";
private int pageNo = 1;
private boolean isLastPage = false;
private PunishAdapter punishAdapter;
@Override
public void onBeforeSetContentView() {
(this, (this, .color_0a5fb6));
}
@Override
public int getLayoutResID() {
return .activity_punish_list;
}
@Override
protected CharSequence setActionBarTitle() {
return "Administrative Penalty";
}
@Nullable
@Override
public AppBarConfig getAppBarConfig() {
return mAppBarCompat;
}
@Override
public int setActionBarRightVisibility() {
return ;
}
@Override
public CharSequence setActionBarRightText() {
return "Add to";
}
public void onResume(){
();
getPunishList("");
}
@Override
public void initContentView(@Nullable Bundle savedInstanceState) {
mContext = ;
et_punish_searchName = findViewById(.et_punish_searchName);
iv_search = findViewById(.iv_search);
iv_search.setOnClickListener(this);
prr_punish = findViewById(.prr_punish);
prr_punish.setOnPullRefreshListener(this);
prr_punish.setHasMore(true);
}
@Override
public void initData(@Nullable Bundle savedInstanceState) {
punishAdapter = new PunishAdapter(mContext,punishBeans);
LinearLayoutManager manager = new LinearLayoutManager(mContext);
();
prr_punish.setLayoutManager(manager);
prr_punish.setAdapter(punishAdapter);
// getPunishList();
}
private void getPunishList(String officeName){
HashMap<String, Object> baseParam = ();
("pageNo", pageNo);
("pageSize", 10);
("officeName", officeName);
(TAG, WebApi.PUNISH_LIST_URL, baseParam, new StringCallback() {
@Override
public void onError(Call call, Exception e, int id) {
hideWaitDialog();
(TAG,""+e);
}
@Override
public void onResponse(String response, int id) {
(TAG,"response==="+response);
try {
JSONObject object = new JSONObject(response);
hideWaitDialog();
if ((int)("code") == 200) {
JSONObject object1 = ("data");
PunishBeanList punishBeanList = new Gson().fromJson((),);
(TAG,"response==="+().size());
if (pageNo == 1) {
();
}
if (() != null && ().size() != 0) {
List<PunishBean> addPunishs = new ArrayList<>();
addPunishs = ();
if (() > 0) {
(addPunishs);
(addPunishs);
} else {
punishBeans = addPunishs;
(addPunishs);
}
if (()) {
isLastPage = true;
(TAG,"isLastPage = true ");
}else {
isLastPage = false;
(TAG,"isLastPage = false ");
}
}
} else {
(mContext,("message").toString(),Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
();
}
}
});
}
@Override
protected void actionBarRightOnClick() {
().build(Page.ACTIVITY_PUNISH_ADD).navigation();
}
@Override
public void onClick(View view) {
switch (()) {
case .iv_search:
showWaitDialog();
officeName = et_punish_searchName.getText().toString();
pageNo = 1;
isLastPage = false;
getPunishList(officeName);
break;
}
}
@Override
public void onRefresh() {
prr_punish.refreshOrLoadComplete();
pageNo = 1;
getPunishList(officeName);
prr_punish.setRefreshEnable(true);
}
@Override
public void onLoadMore() {
(TAG,"onLoadMore===================");
prr_punish.refreshOrLoadComplete();
if (isLastPage) {
prr_punish.setRefreshEnable(false);
} else {
pageNo += 1;
getPunishList(officeName);
}
}
}
public class PunishAdapter extends <> {
private Context mContext;
private List<PunishBean> punishList;
public PunishAdapter(Context mContext, List<PunishBean> punishList) {
= mContext;
= punishList;
}
@NonNull
@Override
public onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = (mContext).inflate(.punish_item,parent,false);
PunishHolder punishHolder = new PunishHolder(view);
return punishHolder;
}
@Override
public void onBindViewHolder(@NonNull holder, int position) {
PunishBean punishBean = (position);
PunishHolder punishHolder = (PunishHolder) holder;
punishHolder.tv_punishName.setText(());
punishHolder.tv_faren.setText(());
punishHolder.tv_punishMode.setText(());
punishHolder.tv_punishReason.setText(());
punishHolder.tv_punishTime.setText(());
punishHolder.tv_punishDesc.setText(());
(new () {
@Override
public void onClick(View view) {
Bundle bundle = new Bundle();
("punishDetail",punishBean);
().build(Page.ACTIVITY_PUNISH_DETAIL).with(bundle).navigation();
}
});
}
/*
* Add data to the end of the list
* */
public void addMoreData(List<PunishBean> list) {
int oldSize = ();
if (list != null && () > 0) {
((), list);
notifyItemRangeInserted(oldSize, ());
}
}
/*
* Fill in new data
* */
public void setData(List<PunishBean> data) {
if (data != null && () > 0) {
();
(data);
notifyDataSetChanged();
}
}
@Override
public int getItemCount() {
return punishList==null? 0:();
}
class PunishHolder extends {
private TextView tv_punishName,tv_faren,tv_punishMode,tv_punishReason,tv_punishTime,tv_punishDesc;
public PunishHolder(@NonNull View itemView) {
super(itemView);
tv_punishName = (.tv_punishName);
tv_faren = (.tv_faren);
tv_punishMode = (.tv_punishMode);
tv_punishReason = (.tv_punishReason);
tv_punishTime = (.tv_punishTime);
tv_punishDesc = (.tv_punishDesc);
}
}
}
4. Layout file:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:andro xmlns:app="/apk/res-auto" xmlns:tools="/tools" android:fitsSystemWindows="true" android:orientation="vertical" android:layout_margin="@dimen/px40" android:background="@color/color_ffffff" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="."> <RelativeLayout android: android:layout_width="match_parent" android:layout_marginTop="@dimen/px20" android:layout_height="103px" android:background="@drawable/bg_radius_blue"> <EditText android: android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginStart="@dimen/px44" android:layout_marginEnd="@dimen/px110" android:background="@null" android:hint="Please enter the unit name" android:inputType="text" android:textColor="@color/color_hint" android:textColorHint="@color/color_hint" android:textSize="@dimen/font_14" /> <ImageView android: android:layout_width="@dimen/px54" android:layout_height="@dimen/px54" android:layout_alignParentEnd="true" android:layout_centerVertical="true" android:layout_marginEnd="@dimen/px50" android:src="@drawable/icon_text_search" /> </RelativeLayout> < android: android:layout_width="match_parent" android:layout_height="wrap_content"/> </LinearLayout>
This article has been sorted out"Android drop-down refresh pull-up loading effect", everyone is welcome to study and research.
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