android RecycleView實現下拉重新整理和上拉載入
阿新 • • 發佈：2020-06-23
android 的下拉重新整理，上拉載入功能，翻頁時顯示從第1頁開始到當前頁面的內容，並且當前顯示的是當前頁的內容；
1.PullRefreshRecyclerView.java : 翻頁控制元件
public class PullRefreshRecyclerView extends LinearLayout implements SwipeRefreshLayout.OnRefreshListener,View.OnTouchListener {
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView recyclerView;
private LinearLayout footerView;
private OnPullRefreshListener listener;
//是否正在重新整理
private boolean isRefreshing = false;
//是否正在載入
private boolean isLoading = false;
//是否有更多資料
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) {
LayoutInflater.from(context).inflate(R.layout.pull_recycler_layout,this,true);
swipeRefreshLayout = findViewById(R.id.swipeRefreshLayout);
recyclerView = findViewById(R.id.recyclerView);
footerView = findViewById(R.id.footerView);
}
private void initListener() {
swipeRefreshLayout.setOnRefreshListener(this);
recyclerView.addOnScrollListener(new PullableScroll());
//防止滾動的時候，滑動View
recyclerView.setOnTouchListener(this);
}
private void init() {
swipeRefreshLayout.setColorSchemeResources(android.R.color.holo_green_dark,android.R.color.holo_blue_dark,android.R.color.holo_orange_dark);
//隱藏垂直滾動條
recyclerView.setVerticalScrollBarEnabled(true);
//item高度固定時，設定該選項提高效能
recyclerView.setHasFixedSize(true);
//設定item動畫效果
recyclerView.setItemAnimator(new DefaultItemAnimator());
}
public void setHasFixedSize(boolean hasFixedSize) {
recyclerView.setHasFixedSize(hasFixedSize);
}
public void setItemAnimator(RecyclerView.ItemAnimator animator) {
recyclerView.setItemAnimator(animator);
}
public void setLayoutManager(RecyclerView.LayoutManager layout) {
recyclerView.setLayoutManager(layout);
}
public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) {
recyclerView.setVerticalScrollBarEnabled(verticalScrollBarEnabled);
}
public void addItemDecoration(RecyclerView.ItemDecoration decor) {
recyclerView.addItemDecoration(decor);
}
public void setAdapter(RecyclerView.Adapter adapter) {
recyclerView.setAdapter(adapter);
}
/**
* 設定監聽下拉或上拉的事件
*
* @param listener
*/
public void setOnPullRefreshListener(OnPullRefreshListener listener) {
this.listener = listener;
}
/**
* 設定是否有更多資料
*
* @param hasMore
*/
public void setHasMore(boolean hasMore) {
this.hasMore = hasMore;
}
/**
* 滾動到頂部
*/
public void scrollToTop() {
recyclerView.scrollToPosition(0);
}
/**
* 正在重新整理
*/
@Override
public void onRefresh() {
isRefreshing = true;
if (listener != null) {
listener.onRefresh();
}
}
/**
* 設定是否允許下拉
*
* @param enable
*/
public void setRefreshEnable(boolean enable) {
swipeRefreshLayout.setEnabled(enable);
}
/**
* 滾動時判斷能否能重新整理
*
* @return
*/
private boolean isRefreshEnable() {
return !isRefreshing && !isLoading;
}
/**
* 正在載入更多
*/
public void doLoadMore() {
if (!isLoading && hasMore && !isRefreshing) {
footerView.setVisibility(View.VISIBLE);
isLoading = true;
//禁止下拉
setRefreshEnable(false);
if (listener != null) {
listener.onLoadMore();
}
}
}
/**
* 重新整理或載入完成
*/
public void refreshOrLoadComplete() {
isRefreshing = false;
swipeRefreshLayout.setRefreshing(false);
isLoading = false;
footerView.setVisibility(View.GONE);
//允許下拉
this.setEnabled(true);
}
@Override
public boolean onTouch(View v,MotionEvent event) {
return isRefreshing || isLoading;
}
public interface OnPullRefreshListener {
/**
* 重新整理操作
*/
void onRefresh();
/**
* 載入操作
*/
void onLoadMore();
}
/**
* 監聽RecycleView滑動底部或頂部
*/
class PullableScroll extends RecyclerView.OnScrollListener {
@Override
public void onScrolled(RecyclerView recyclerView,int dx,int dy) {
super.onScrolled(recyclerView,dx,dy);
int lastVisibleItem = 0;
int firstVisibleItem = 0;
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
int totalItemCount = layoutManager.getItemCount();
if (layoutManager instanceof LinearLayoutManager) {
LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition();
firstVisibleItem = linearLayoutManager.findFirstCompletelyVisibleItemPosition();
} 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()];
staggeredGridLayoutManager.findLastVisibleItemPositions(lastPositions);
lastVisibleItem = findMax(lastPositions);
firstVisibleItem = staggeredGridLayoutManager.findFirstVisibleItemPositions(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;
}
}
/**
* 判斷是否滑動到底部
*
* @param recyclerView
* @return
*/
public boolean isSlideToBottom(RecyclerView recyclerView) {
if (recyclerView == null) {
return false;
}
if (recyclerView.computeVerticalScrollExtent() + recyclerView.computeVerticalScrollOffset()
>= recyclerView.computeVerticalScrollRange()) {
return true;
}
return false;
}
private void loadMore(int dx,int dy,int lastVisibleItem,int totalItemCount) {
//滾動到底部時且有更多資料能夠上拉載入
if (lastVisibleItem >= totalItemCount - 1 && (dx > 0 || dy > 0)) {
doLoadMore();
}
}
private void pullRefreshEnable(int firstVisibleItem,int totalItemCount) {
//滾動到頂部時能夠下拉重新整理
if (firstVisibleItem == 0 || totalItemCount == 0) {
if (isRefreshEnable()) {
//允許下拉
setRefreshEnable(true);
}
} else {
//禁止下拉
setRefreshEnable(false);
}
}
}2.PunishListActivity.java: 呼叫
@Route(path = Page.ACTIVITY_PUNISH_LIST)
public class PunishListActivity extends BaseActivity implements View.OnClickListener,PullRefreshRecyclerView.OnPullRefreshListener {
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() {
StatusBarUtil.translucent(this,ContextCompat.getColor(this,R.color.color_0a5fb6));
}
@Override
public int getLayoutResID() {
return R.layout.activity_punish_list;
}
@Override
protected CharSequence setActionBarTitle() {
return "行政處罰";
}
@Nullable
@Override
public AppBarConfig getAppBarConfig() {
return mAppBarCompat;
}
@Override
public int setActionBarRightVisibility() {
return View.VISIBLE;
}
@Override
public CharSequence setActionBarRightText() {
return "新增";
}
public void onResume(){
super.onResume();
getPunishList("");
}
@Override
public void initContentView(@Nullable Bundle savedInstanceState) {
mContext = PunishListActivity.this;
et_punish_searchName = findViewById(R.id.et_punish_searchName);
iv_search = findViewById(R.id.iv_search);
iv_search.setOnClickListener(this);
prr_punish = findViewById(R.id.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);
manager.setOrientation(RecyclerView.VERTICAL);
prr_punish.setLayoutManager(manager);
prr_punish.setAdapter(punishAdapter);
// getPunishList();
}
private void getPunishList(String officeName){
HashMap<String,Object> baseParam = WebFrontUtil.getBaseParam();
baseParam.put("pageNo",pageNo);
baseParam.put("pageSize",10);
baseParam.put("officeName",officeName);
OkHttpUtil.post(TAG,WebApi.PUNISH_LIST_URL,baseParam,new StringCallback() {
@Override
public void onError(Call call,Exception e,int id) {
hideWaitDialog();
Log.d(TAG,""+e);
}
@Override
public void onResponse(String response,int id) {
Log.d(TAG,"response==="+response);
try {
JSONObject object = new JSONObject(response);
hideWaitDialog();
if ((int)object.get("code") == 200) {
JSONObject object1 = object.getJSONObject("data");
PunishBeanList punishBeanList = new Gson().fromJson(object1.toString(),PunishBeanList.class);
Log.d(TAG,"response==="+punishBeanList.getList().size());
if (pageNo == 1) {
punishBeans.clear();
}
if (punishBeanList.getList() != null && punishBeanList.getList().size() != 0) {
List<PunishBean> addPunishs = new ArrayList<>();
addPunishs = punishBeanList.getList();
if (punishBeans.size() > 0) {
punishBeans.addAll(addPunishs);
punishAdapter.addMoreData(addPunishs);
} else {
punishBeans = addPunishs;
punishAdapter.setData(addPunishs);
}
if (punishBeanList.isLastPage()) {
isLastPage = true;
Log.e(TAG,"isLastPage = true ");
}else {
isLastPage = false;
Log.e(TAG,"isLastPage = false ");
}
}
} else {
Toast.makeText(mContext,object.get("message").toString(),Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
@Override
protected void actionBarRightOnClick() {
ARouter.getInstance().build(Page.ACTIVITY_PUNISH_ADD).navigation();
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.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() {
Log.d(TAG,"onLoadMore===================");
prr_punish.refreshOrLoadComplete();
if (isLastPage) {
prr_punish.setRefreshEnable(false);
} else {
pageNo += 1;
getPunishList(officeName);
}
}
}3.PunishAdapter.java
public class PunishAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context mContext;
private List<PunishBean> punishList;
public PunishAdapter(Context mContext,List<PunishBean> punishList) {
this.mContext = mContext;
this.punishList = punishList;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent,int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.punish_item,parent,false);
PunishHolder punishHolder = new PunishHolder(view);
return punishHolder;
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder,int position) {
PunishBean punishBean = punishList.get(position);
PunishHolder punishHolder = (PunishHolder) holder;
punishHolder.tv_punishName.setText(punishBean.getOfficeName());
punishHolder.tv_faren.setText(punishBean.getLegalPerson());
punishHolder.tv_punishMode.setText(punishBean.getPunishWay());
punishHolder.tv_punishReason.setText(punishBean.getReason());
punishHolder.tv_punishTime.setText(punishBean.getUpdateTime());
punishHolder.tv_punishDesc.setText(punishBean.getRemarks());
punishHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Bundle bundle = new Bundle();
bundle.putSerializable("punishDetail",punishBean);
ARouter.getInstance().build(Page.ACTIVITY_PUNISH_DETAIL).with(bundle).navigation();
}
});
}
/*
* 向列表尾部新增資料
* */
public void addMoreData(List<PunishBean> list) {
int oldSize = punishList.size();
if (list != null && list.size() > 0) {
punishList.addAll(punishList.size(),list);
notifyItemRangeInserted(oldSize,list.size());
}
}
/*
* 填充新資料
* */
public void setData(List<PunishBean> data) {
if (data != null && data.size() > 0) {
punishList.clear();
punishList.addAll(data);
notifyDataSetChanged();
}
}
@Override
public int getItemCount() {
return punishList==null? 0:punishList.size();
}
class PunishHolder extends RecyclerView.ViewHolder {
private TextView tv_punishName,tv_faren,tv_punishMode,tv_punishReason,tv_punishTime,tv_punishDesc;
public PunishHolder(@NonNull View itemView) {
super(itemView);
tv_punishName = itemView.findViewById(R.id.tv_punishName);
tv_faren = itemView.findViewById(R.id.tv_faren);
tv_punishMode = itemView.findViewById(R.id.tv_punishMode);
tv_punishReason = itemView.findViewById(R.id.tv_punishReason);
tv_punishTime = itemView.findViewById(R.id.tv_punishTime);
tv_punishDesc = itemView.findViewById(R.id.tv_punishDesc);
}
}
}4. 佈局檔案：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/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=".modules.punish.PunishListActivity">
<RelativeLayout
android:id="@+id/rl_punish_search"
android:layout_width="match_parent"
android:layout_marginTop="@dimen/px20"
android:layout_height="103px"
android:background="@drawable/bg_radius_blue">
<EditText
android:id="@+id/et_punish_searchName"
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="請輸入單位名稱"
android:inputType="text"
android:textColor="@color/color_hint"
android:textColorHint="@color/color_hint"
android:textSize="@dimen/font_14" />
<ImageView
android:id="@+id/iv_search"
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>
<com.nmpa.nmpaapp.widget.PullRefreshRecyclerView
android:id="@+id/prr_punish"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
本文已經被整理到《Android下拉重新整理上拉載入效果》，歡迎大家學習研究。
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