首先，我已经审查了很多问题，但是找不到这个问题的明确答案。
我借助 Retrofit2 和Gson从服务器获取JSON数据。我的列表中有可扩展项，因此我使用下面添加的 ExpandableLayout 库进行列表。
问题是，当JSON太多时，行数增加了，我得到了大约1分钟的列表屏幕。实际上，有时我无法在与我测试过相同型号的其他设备上完成渲染事件，并且屏幕冻结。我无法添加错误代码，因为我无法在此处调试远程设备。
在Firebase性能数据中，我得到了100％冻结的帧反馈。没有崩溃数据。
我的列表行是这样的：
https://github.com/iammert/ExpandableLayout
如果没有按钮和下面的 imageview ，我可以使用 textview 很好地完成此操作，该视图仅包含名称，但是视图会增加渲染时间，有时需要超过1分钟。
public class MenuActivity extends AppCompatActivity {
private List<MenuItemModel.Item> items = new ArrayList<>();
ExpandableLayout sectionLinearLayout;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
...
}
EditText editText = findViewById(R.id.edittext);
sectionLinearLayout = findViewById(R.id.el);
sectionLinearLayout.setRenderer(new ExpandableLayout.Renderer<MainItem, Modifier>() {
@Override
public void renderParent(View view, MainItem model, boolean isExpanded, int parentPosition, Section section) {
LinearLayout layout = view.findViewById(R.id.layout_parent);
layout.setBackgroundColor(Color.WHITE);
TextView parentText = view.findViewById(R.id.tvParent);
parentText.setText(model.name);
final Button currentButton = view.findViewById(R.id.action_button_parent);
LinearLayout buttonMenu = view.findViewById(R.id.button_menu_parent);
// Set icons according to availability
List<Links> linksList = model.item.getLinks();
List<String> appList = new ArrayList<>();
for (Links link: linksList) {
appList.add(link.getApp());
}
Map<String,ImageView> iconMap = new HashMap<>();
final ImageView uber_icon = view.findViewById(R.id.uber_icon);
uber_icon.setTag("uber");
iconMap.put((String) uber_icon.getTag(),uber_icon);
final ImageView dd_icon = view.findViewById(R.id.dd_icon);
dd_icon.setTag("doordash");
iconMap.put((String) dd_icon.getTag(), dd_icon);
for (String app:appList){
for(Map.Entry m:iconMap.entrySet()) {
if (m.getKey().equals(app)) {
ImageView iconview = (ImageView) m.getValue();
iconview.setVisibility(VISIBLE);
}
}
}
// Check statuses and set actionbutton
if (model.status == 1){
currentButton.setBackgroundResource(R.drawable.available);
currentButton.setTag(R.drawable.available);
} else if (model.status == 2){
currentButton.setBackgroundResource(R.drawable.sold_out_red);
currentButton.setTag(R.drawable.sold_out_red);
} else {
currentButton.setBackgroundResource(R.drawable.mixed_button);
currentButton.setTag(R.drawable.mixed_button);
}
parentText.setTextColor(getResources().getColor(R.color.black));
parentText.setTextSize(20);
if (!(section.children.size() == 0)) {
view.findViewById(R.id.arrow).setBackgroundResource(isExpanded ? R.drawable.arrow_down : R.drawable.arrow_right);
}
currentButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openParentButtonMenu(currentButton, view, linksList);
}
});
layout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sectionLinearLayout.checkexpand(section);
closeActionButtonMenu(buttonMenu,currentButton);
}
});
}
@Override
public void renderChild(View view, Modifier model, int parentPosition, int childPosition) {
LinearLayout layout = view.findViewById(R.id.layout_child);
int color = childPosition%2;
if (color == 0){
layout.setBackgroundColor(getResources().getColor(R.color.colorGrayLighter));
} else {
layout.setBackgroundColor(Color.WHITE);
}
TextView childText = view.findViewById(R.id.tvChild);
childText.setText(model.name);
childText.setTextColor(getResources().getColor(R.color.black));
childText.setTextSize(18);
final Button currentButton = view.findViewById(R.id.action_button_child);
LinearLayout buttonMenu = view.findViewById(R.id.button_menu_child);
// Set icons according to availability
List<Links> linksList = model.subItem.getLinks();
List<String> appList = new ArrayList<>();
for (Links link: linksList) {
appList.add(link.getApp());
}
Map<String,ImageView> iconMap = new HashMap<>();
final ImageView uber_icon = view.findViewById(R.id.uber_icon);
uber_icon.setTag("uber");
iconMap.put((String) uber_icon.getTag(),uber_icon);
final ImageView dd_icon = view.findViewById(R.id.doordash_icon);
dd_icon.setTag("doordash");
iconMap.put((String) dd_icon.getTag(), dd_icon);
for (String app:appList){
for(Map.Entry m:iconMap.entrySet()) {
if (m.getKey().equals(app)) {
ImageView iconview = (ImageView) m.getValue();
iconview.setVisibility(VISIBLE);
}
}
}
// Check statuses and set actionbutton
if (model.status == 1){
currentButton.setBackgroundResource(R.drawable.available);
currentButton.setTag(R.drawable.available);
} else if (model.status == 2){
currentButton.setBackgroundResource(R.drawable.sold_out_red);
currentButton.setTag(R.drawable.sold_out_red);
} else {
currentButton.setBackgroundResource(R.drawable.mixed_button);
currentButton.setTag(R.drawable.mixed_button);
}
currentButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openChildButtonMenu(currentButton, view, linksList);
}
});
layout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
closeActionButtonMenu(buttonMenu,currentButton);
}
});
}
});
...
getMenuItems();
}
...
private void getMenuItems() {
progressDialog = createProgressDialog(MenuActivity.this);
String token = "Token " + PreferenceManager.getToken(MenuActivity.this);
int companyID = PreferenceManager.getCompanyID(MenuActivity.this);
APIGetMenu service = SettingsService.getRetrofitInstanceForSettings().create(APIGetMenu.class);
service.getMenu(token,companyID)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<MenuItemModel>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(MenuItemModel menuItemModel) {
items = menuItemModel.getItems();
}
@Override
public void onError(Throwable e) {
progressDialog.dismiss();
Toast.makeText(MenuActivity.this, "Something went wrong...Please try again ", Toast.LENGTH_LONG).show();
Log.i("MenuActivity", String.valueOf(e));
}
@Override
public void onComplete() {
Log.i("MenuActivity", "GET is Success");
for (MenuItemModel.Item item:items){
List<MenuItemModel.Item.SubItem> subItems = item.getSubItems();
sectionLinearLayout.addSection(getSection(item,subItems));
}
progressDialog.dismiss();
}
private ProgressDialog createProgressDialog(Context mContext) {
...
}
...
public void closeActionButtonMenu(LinearLayout buttonMenu, Button actionButton){
if (buttonMenu != null){
if (buttonMenu.getVisibility() == VISIBLE){
buttonMenu.setVisibility(GONE);
actionButton.setVisibility(VISIBLE);
}
}
}
public void openParentButtonMenu(Button currentButton, View view, List<Links> links){
currentButton.setVisibility(GONE);
LinearLayout menu = view.findViewById(R.id.button_menu_parent);
final Button available = view.findViewById(R.id.action_button1_parent);
final Button soldOut = view.findViewById(R.id.action_button2_parent);
Object tag = currentButton.getTag();
int backgroundID = R.drawable.available;
int backgroundID2 = R.drawable.mixed_button;
if ( (Integer) tag == backgroundID) {
available.setBackgroundResource(R.drawable.available_white);
available.setTag(R.drawable.available_white);
soldOut.setBackgroundResource(R.drawable.sold_out_red);
soldOut.setTag(R.drawable.sold_out_red);
} else if ((Integer) tag == backgroundID2) {
available.setBackgroundResource(R.drawable.available);
available.setTag(R.drawable.available);
soldOut.setBackgroundResource(R.drawable.sold_out_red);
soldOut.setTag(R.drawable.sold_out_red);
} else {
available.setBackgroundResource(R.drawable.available);
available.setTag(R.drawable.available);
soldOut.setBackgroundResource(R.drawable.sold_out_white);
soldOut.setTag(R.drawable.sold_out_white);
}
menu.setVisibility(VISIBLE);
available.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
currentButton.setTag(R.drawable.available);
closeButtonMenu(available, currentButton, menu, links);
}
});
soldOut.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
currentButton.setTag(R.drawable.sold_out_red);
closeButtonMenu(soldOut, currentButton, menu, links);
}
});
}
public void openChildButtonMenu(Button currentButton, View view, List<Links> links){
currentButton.setVisibility(GONE);
LinearLayout menu = view.findViewById(R.id.button_menu_child);
final Button available = view.findViewById(R.id.action_button1_child);
final Button soldOut = view.findViewById(R.id.action_button2_child);
Object tag = currentButton.getTag();
int backgroundID = R.drawable.available;
int backgroundID2 = R.drawable.mixed_button;
if ( (Integer) tag == backgroundID) {
available.setBackgroundResource(R.drawable.available_white);
available.setTag(R.drawable.available_white);
soldOut.setBackgroundResource(R.drawable.sold_out_red);
soldOut.setTag(R.drawable.sold_out_red);
} else if ((Integer) tag == backgroundID2) {
available.setBackgroundResource(R.drawable.available);
available.setTag(R.drawable.available);
soldOut.setBackgroundResource(R.drawable.sold_out_red);
soldOut.setTag(R.drawable.sold_out_red);
} else {
available.setBackgroundResource(R.drawable.available);
available.setTag(R.drawable.available);
soldOut.setBackgroundResource(R.drawable.sold_out_white);
soldOut.setTag(R.drawable.sold_out_white);
}
menu.setVisibility(VISIBLE);
available.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
currentButton.setTag(R.drawable.available);
closeButtonMenu(available, currentButton, menu, links);
}
});
soldOut.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
currentButton.setTag(R.drawable.sold_out_red);
closeButtonMenu(soldOut, currentButton, menu, links);
}
});
}
public void closeButtonMenu(Button selectedButton, Button currentButton, LinearLayout menu, List<Links> links) {
menu.setVisibility(GONE);
Object tag = selectedButton.getTag();
int backgroundID1 = R.drawable.available;
int backgroundID2 = R.drawable.available_white;
int backgroundID3 = R.drawable.sold_out_white;
int backgroundID4 = R.drawable.sold_out_red;
if ((Integer) tag == backgroundID1) {
call86(links, "available", currentButton);
} else if ((Integer) tag == backgroundID2) {
currentButton.setBackgroundResource(R.drawable.available);
} else if ((Integer) tag == backgroundID3) {
currentButton.setBackgroundResource(R.drawable.sold_out_red);
} else if ((Integer) tag == backgroundID4) {
call86(links, "soldOutToday", currentButton);
}
currentButton.setVisibility(VISIBLE);
}
public void call86(List<Links> links, String comeFrom, Button currrentButton){
...
}
public Section<MainItem, Modifier> getSection(MenuItemModel.Item item, List<MenuItemModel.Item.SubItem> subItems) {
Section<MainItem, Modifier> section = new Section<>();
boolean haveModifiers = !(subItems == null || subItems.isEmpty());
section.parent = new MainItem(item, getStatus(item), haveModifiers);
for (MenuItemModel.Item.SubItem subItem:subItems){
Modifier modifier = new Modifier(subItem, getStatusForModifiers(subItem));
section.children.add(modifier);
}
section.expanded = false;
return section;
}
private int getStatus(MenuItemModel.Item item) {
...
}
private int getStatusForModifiers(MenuItemModel.Item.SubItem modifier) {
...
}
我使用的库在这里：
https://thoughtbot.com/blog/introducing-expandablerecyclerview
我的问题是：
该如何解决冻结的问题？
我应该使用以下可扩展的 recyclerview 库还是 ExpandableListeView ？如果您认为所使用的设备是具有1 GB RAM的Amazon设备，那么您认为我现在使用的库在性能方面是否有所不同？
可扩展的RecyclerView： {{3}}
谢谢您的帮助