diff --git a/app/src/leanback/java/com/fongmi/android/tv/ui/activity/HomeActivity.java b/app/src/leanback/java/com/fongmi/android/tv/ui/activity/HomeActivity.java
index 3373e6ee6..ef75d1699 100644
--- a/app/src/leanback/java/com/fongmi/android/tv/ui/activity/HomeActivity.java
+++ b/app/src/leanback/java/com/fongmi/android/tv/ui/activity/HomeActivity.java
@@ -250,7 +250,7 @@ public class HomeActivity extends BaseActivity implements CustomTitleView.Listen
         boolean exist = recommendIndex - historyIndex == 2;
         if (renew) mHistoryAdapter = new ArrayObjectAdapter(mPresenter = new HistoryPresenter(this));
         if ((items.isEmpty() && exist) || (renew && exist)) mAdapter.removeItems(historyIndex, 1);
-        if ((items.size() > 0 && !exist) || (renew && exist)) mAdapter.add(historyIndex, new ListRow(mHistoryAdapter));
+        if ((!items.isEmpty() && !exist) || (renew && exist)) mAdapter.add(historyIndex, new ListRow(mHistoryAdapter));
         mHistoryAdapter.setItems(items, null);
     }
 
diff --git a/app/src/leanback/java/com/fongmi/android/tv/ui/activity/LiveActivity.java b/app/src/leanback/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
index 58d8cb94a..fd619ab78 100644
--- a/app/src/leanback/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
+++ b/app/src/leanback/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
@@ -520,7 +520,7 @@ public class LiveActivity extends BaseActivity implements GroupPresenter.OnClick
 
     @Override
     public void onItemClick(Channel item) {
-        if (item.getData().getList().size() > 0 && item.isSelected() && mChannel != null && mChannel.equals(item) && mChannel.getGroup().equals(mGroup)) {
+        if (!item.getData().getList().isEmpty() && item.isSelected() && mChannel != null && mChannel.equals(item) && mChannel.getGroup().equals(mGroup)) {
             showEpg(item);
         } else {
             mGroup.setPosition(mBinding.channel.getSelectedPosition());
diff --git a/app/src/main/java/com/fongmi/android/tv/api/config/VodConfig.java b/app/src/main/java/com/fongmi/android/tv/api/config/VodConfig.java
index f12fa56ff..d7ccc6b81 100644
--- a/app/src/main/java/com/fongmi/android/tv/api/config/VodConfig.java
+++ b/app/src/main/java/com/fongmi/android/tv/api/config/VodConfig.java
@@ -197,7 +197,7 @@ public class VodConfig {
     }
 
     private void initOther(JsonObject object) {
-        if (parses.size() > 0) parses.add(0, Parse.god());
+        if (!parses.isEmpty()) parses.add(0, Parse.god());
         if (home == null) setHome(sites.isEmpty() ? new Site() : sites.get(0));
         if (parse == null) setParse(parses.isEmpty() ? new Parse() : parses.get(0));
         setRules(Rule.arrayFrom(object.getAsJsonArray("rules")));
diff --git a/app/src/main/java/com/fongmi/android/tv/bean/History.java b/app/src/main/java/com/fongmi/android/tv/bean/History.java
index af43a466c..541f6e1cd 100644
--- a/app/src/main/java/com/fongmi/android/tv/bean/History.java
+++ b/app/src/main/java/com/fongmi/android/tv/bean/History.java
@@ -300,9 +300,9 @@ public class History {
     }
 
     public void findEpisode(List<Flag> flags) {
-        if (flags.size() > 0) {
+        if (!flags.isEmpty()) {
             setVodFlag(flags.get(0).getFlag());
-            if (flags.get(0).getEpisodes().size() > 0) {
+            if (!flags.get(0).getEpisodes().isEmpty()) {
                 setVodRemarks(flags.get(0).getEpisodes().get(0).getName());
             }
         }
diff --git a/app/src/main/java/com/fongmi/android/tv/bean/Hot.java b/app/src/main/java/com/fongmi/android/tv/bean/Hot.java
index 8d8f65b32..9a1ae4d7e 100644
--- a/app/src/main/java/com/fongmi/android/tv/bean/Hot.java
+++ b/app/src/main/java/com/fongmi/android/tv/bean/Hot.java
@@ -20,7 +20,7 @@ public class Hot {
         try {
             List<String> items = new ArrayList<>();
             for (Data item : objectFrom(str).getData()) items.add(item.getTitle());
-            if (items.size() > 0) Setting.putHot(str);
+            if (!items.isEmpty()) Setting.putHot(str);
             return items;
         } catch (Exception e) {
             return new ArrayList<>();
diff --git a/app/src/main/java/com/fongmi/android/tv/bean/Result.java b/app/src/main/java/com/fongmi/android/tv/bean/Result.java
index ee5e4913e..91e19366a 100644
--- a/app/src/main/java/com/fongmi/android/tv/bean/Result.java
+++ b/app/src/main/java/com/fongmi/android/tv/bean/Result.java
@@ -157,7 +157,7 @@ public class Result implements Parcelable {
     }
 
     public void setTypes(List<Class> types) {
-        if (types.size() > 0) this.types = types;
+        if (!types.isEmpty()) this.types = types;
     }
 
     public List<Vod> getList() {
diff --git a/app/src/main/java/com/fongmi/android/tv/model/SiteViewModel.java b/app/src/main/java/com/fongmi/android/tv/model/SiteViewModel.java
index 290f8f44d..579b5299f 100644
--- a/app/src/main/java/com/fongmi/android/tv/model/SiteViewModel.java
+++ b/app/src/main/java/com/fongmi/android/tv/model/SiteViewModel.java
@@ -68,7 +68,7 @@ public class SiteViewModel extends ViewModel {
                 String homeContent = spider.homeContent(true);
                 SpiderDebug.log(homeContent);
                 Result result = Result.fromJson(homeContent);
-                if (result.getList().size() > 0) return result;
+                if (!result.getList().isEmpty()) return result;
                 String homeVideoContent = spider.homeVideoContent();
                 SpiderDebug.log(homeVideoContent);
                 result.setList(Result.fromJson(homeVideoContent).getList());
diff --git a/app/src/main/java/com/fongmi/android/tv/server/process/Action.java b/app/src/main/java/com/fongmi/android/tv/server/process/Action.java
index fd6f8ab39..69f734717 100644
--- a/app/src/main/java/com/fongmi/android/tv/server/process/Action.java
+++ b/app/src/main/java/com/fongmi/android/tv/server/process/Action.java
@@ -161,7 +161,7 @@ public class Action implements Process {
     private void syncKeep(Map<String, String> params, boolean force) {
         List<Keep> targets = Keep.arrayFrom(params.get("targets"));
         List<Config> configs = Config.arrayFrom(params.get("configs"));
-        if (TextUtils.isEmpty(VodConfig.getUrl()) && configs.size() > 0) {
+        if (TextUtils.isEmpty(VodConfig.getUrl()) && !configs.isEmpty()) {
             VodConfig.load(Config.find(configs.get(0)), getCallback(configs, targets));
         } else {
             if (force) Keep.deleteAll();
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/activity/CollectActivity.java b/app/src/mobile/java/com/fongmi/android/tv/ui/activity/CollectActivity.java
index 795b6566a..750549bca 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/activity/CollectActivity.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/activity/CollectActivity.java
@@ -154,7 +154,7 @@ public class CollectActivity extends BaseActivity implements CustomScroller.Call
             mCollectAdapter.add(result.getList());
         });
         mViewModel.result.observe(this, result -> {
-            boolean same = result.getList().size() > 0 && mCollectAdapter.getActivated().getSite().equals(result.getList().get(0).getSite());
+            boolean same = !result.getList().isEmpty() && mCollectAdapter.getActivated().getSite().equals(result.getList().get(0).getSite());
             if (same) mCollectAdapter.getActivated().getList().addAll(result.getList());
             if (same) mSearchAdapter.addAll(result.getList());
             mScroller.endLoading(result);
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/activity/LiveActivity.java b/app/src/mobile/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
index 7e80f5cab..fba2e1bdc 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/activity/LiveActivity.java
@@ -556,7 +556,7 @@ public class LiveActivity extends BaseActivity implements CustomKeyDownLive.List
 
     @Override
     public void onItemClick(Channel item) {
-        if (item.getData().getList().size() > 0 && item.isSelected() && mChannel != null && mChannel.equals(item) && mChannel.getGroup().equals(mGroup)) {
+        if (!item.getData().getList().isEmpty() && item.isSelected() && mChannel != null && mChannel.equals(item) && mChannel.getGroup().equals(mGroup)) {
             showEpg(item);
         } else {
             mGroup.setPosition(mChannelAdapter.setSelected(item.group(mGroup)));
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/adapter/TypeAdapter.java b/app/src/mobile/java/com/fongmi/android/tv/ui/adapter/TypeAdapter.java
index 23aab9cf6..fd90a30c0 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/adapter/TypeAdapter.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/adapter/TypeAdapter.java
@@ -44,8 +44,8 @@ public class TypeAdapter extends RecyclerView.Adapter<TypeAdapter.ViewHolder> {
 
     public void addAll(Result result) {
         mItems.addAll(result.getTypes());
-        if (result.getList().size() > 0) mItems.add(0, home());
-        if (mItems.size() > 0) mItems.get(0).setActivated(true);
+        if (!result.getList().isEmpty()) mItems.add(0, home());
+        if (!mItems.isEmpty()) mItems.get(0).setActivated(true);
         notifyDataSetChanged();
     }
 
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/CastDialog.java b/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/CastDialog.java
index c60dfbf56..ff03f44f3 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/CastDialog.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/CastDialog.java
@@ -156,7 +156,7 @@ public class CastDialog extends BaseDialog implements DeviceAdapter.OnClickListe
 
     @Override
     public void onFind(List<Device> devices) {
-        if (devices.size() > 0) adapter.addAll(devices);
+        if (!devices.isEmpty()) adapter.addAll(devices);
     }
 
     @Override
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/SyncDialog.java b/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/SyncDialog.java
index 87464275b..e2b0a3f66 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/SyncDialog.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/dialog/SyncDialog.java
@@ -151,7 +151,7 @@ public class SyncDialog extends BaseDialog implements DeviceAdapter.OnClickListe
 
     @Override
     public void onFind(List<Device> devices) {
-        if (devices.size() > 0) adapter.addAll(devices);
+        if (!devices.isEmpty()) adapter.addAll(devices);
     }
 
     @Override
diff --git a/app/src/mobile/java/com/fongmi/android/tv/ui/fragment/VodFragment.java b/app/src/mobile/java/com/fongmi/android/tv/ui/fragment/VodFragment.java
index 73b881b4e..6a8a3f76b 100644
--- a/app/src/mobile/java/com/fongmi/android/tv/ui/fragment/VodFragment.java
+++ b/app/src/mobile/java/com/fongmi/android/tv/ui/fragment/VodFragment.java
@@ -179,7 +179,7 @@ public class VodFragment extends BaseFragment implements SiteCallback, FilterCal
             mBinding.top.setVisibility(View.INVISIBLE);
             mBinding.link.setVisibility(View.VISIBLE);
             mBinding.filter.setVisibility(View.GONE);
-        } else if (mAdapter.get(position).getFilters().size() > 0) {
+        } else if (!mAdapter.get(position).getFilters().isEmpty()) {
             mBinding.top.setVisibility(View.INVISIBLE);
             mBinding.link.setVisibility(View.GONE);
             mBinding.filter.show();