load theme using task

Author: tranleduy2000

app/src/main/java/com/duy/ccppcompiler/ide/editor/theme/EditorThemeFragment.java

@@ -2,6 +2,7 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -13,6 +14,7 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import com.duy.ccppcompiler.R;
@@ -36,7 +38,7 @@ public class EditorThemeFragment extends Fragment {
     private RecyclerView mRecyclerView;
     private EditorThemeAdapter mEditorThemeAdapter;
     private Preferences mPreferences;
-
+    private ProgressBar mProgressBar;
 
     @Nullable
     @Override
@@ -48,16 +50,19 @@ public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup c
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         mPreferences = Preferences.getInstance(getContext());
+        mProgressBar = view.findViewById(R.id.progress_bar);
         mRecyclerView = view.findViewById(R.id.recyclerView);
         mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
         mRecyclerView.addItemDecoration(new DividerItemDecoration(getContext(), DividerItemDecoration.VERTICAL));
-        mEditorThemeAdapter = new EditorThemeAdapter(getContext());
-        mEditorThemeAdapter.setOnThemeSelectListener((EditorThemeAdapter.OnThemeSelectListener) getActivity());
-        mRecyclerView.setAdapter(mEditorThemeAdapter);
-        mRecyclerView.scrollToPosition(findThemeIndex(mPreferences.getEditorTheme()));
+        loadData();
 
     }
 
+
+    private void loadData() {
+        new LoadThemeTask(getContext()).execute();
+    }
+
     private int findThemeIndex(EditorTheme editorTheme) {
         int position = mEditorThemeAdapter.getPosition(editorTheme);
         if (position < 0) {
@@ -72,7 +77,7 @@ public static class EditorThemeAdapter extends RecyclerView.Adapter<EditorThemeA
         private OnThemeSelectListener onThemeSelectListener;
         private Mode mLanguage = Catalog.getModeByName("C++");
 
-        public EditorThemeAdapter(Context context) {
+        EditorThemeAdapter(Context context) {
             mContext = context;
             mEditorThemes = ThemeLoader.getAll(context);
             Collections.sort(mEditorThemes, new Comparator<EditorTheme>() {
@@ -83,7 +88,7 @@ public int compare(EditorTheme o1, EditorTheme o2) {
             });
         }
 
-        public int getPosition(EditorTheme editorTheme) {
+        int getPosition(EditorTheme editorTheme) {
             return mEditorThemes.indexOf(editorTheme);
         }
 
@@ -199,4 +204,39 @@ public ViewHolder(View itemView) {
             }
         }
     }
+
+    private class LoadThemeTask extends AsyncTask<Void, Void, Void> {
+        private Context context;
+
+        LoadThemeTask(Context context) {
+            this.context = context;
+        }
+
+        public Context getContext() {
+            return context;
+        }
+
+        @Override
+        protected void onPreExecute() {
+            super.onPreExecute();
+            mProgressBar.setVisibility(View.VISIBLE);
+            mProgressBar.setIndeterminate(true);
+        }
+
+        @Override
+        protected Void doInBackground(Void... voids) {
+            ThemeLoader.init(getContext());
+            return null;
+        }
+
+        @Override
+        protected void onPostExecute(Void aVoid) {
+            super.onPostExecute(aVoid);
+            mEditorThemeAdapter = new EditorThemeAdapter(getContext());
+            mEditorThemeAdapter.setOnThemeSelectListener((EditorThemeAdapter.OnThemeSelectListener) getActivity());
+            mRecyclerView.setAdapter(mEditorThemeAdapter);
+            mRecyclerView.scrollToPosition(findThemeIndex(mPreferences.getEditorTheme()));
+            mProgressBar.setVisibility(View.GONE);
+        }
+    }
 }

app/src/main/res/layout/fragment_editor_theme.xml

@@ -1,12 +1,27 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/recyclerView"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    app:fastScrollPopupBgColor="?android:windowBackground"
-    app:fastScrollPopupTextColor="?android:textColorPrimary"
-    app:fastScrollPopupTextSize="24sp"
-    app:fastScrollThumbColor="?colorAccent">
+    android:layout_height="match_parent">
 
-</com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView>
+    <com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:id="@+id/recyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:fastScrollPopupBgColor="?android:windowBackground"
+        app:fastScrollPopupTextColor="?android:textColorPrimary"
+        app:fastScrollPopupTextSize="24sp"
+        app:fastScrollThumbColor="?colorAccent">
+
+    </com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView>
+
+    <android.support.v4.widget.ContentLoadingProgressBar
+        android:id="@+id/progress_bar"
+        style="@style/Widget.AppCompat.ProgressBar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true"
+        android:visibility="gone" />
+
+</FrameLayout>