save state avoid missing data

Author: tranleduy2000

app/src/main/java/com/duy/ccppcompiler/diagnostic/DiagnosticFragment.java

@@ -42,14 +42,19 @@ public class DiagnosticFragment extends Fragment implements DiagnosticContract.V
     private DiagnosticContract.Presenter mPresenter;
     private DiagnosticAdapter mAdapter;
 
-    private void init() {
+    public static DiagnosticFragment newInstance() {
 
+        Bundle args = new Bundle();
+
+        DiagnosticFragment fragment = new DiagnosticFragment();
+        fragment.setArguments(args);
+        return fragment;
     }
 
     @Nullable
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
-        return super.onCreateView(inflater, container, savedInstanceState);
+   return inflater.inflate(R.layout.fragment_diagnostic, container, false);
 
     }
 
@@ -68,7 +73,6 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
         mAdapter = new DiagnosticAdapter(diagnostics, getContext());
         mAdapter.setDiagnosticClickListener(this);
         mRecyclerView.setAdapter(mAdapter);
-        init();
     }
 
     @Override

app/src/main/java/com/jecelyin/editor/v2/ui/activities/EditorActivity.java

@@ -27,6 +27,7 @@
 import android.support.annotation.IdRes;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v4.app.FragmentManager;
 import android.support.v4.view.GravityCompat;
 import android.support.v4.view.ViewPager;
 import android.support.v4.widget.DrawerLayout;
@@ -45,6 +46,7 @@
 import com.duy.ccppcompiler.R;
 import com.duy.ccppcompiler.compiler.CompileManager;
 import com.duy.ccppcompiler.compiler.CompilerFactory;
+import com.duy.ccppcompiler.diagnostic.DiagnosticFragment;
 import com.duy.ccppcompiler.diagnostic.DiagnosticPresenter;
 import com.duy.ide.compiler.CompileTask;
 import com.duy.ide.compiler.INativeCompiler;
@@ -227,9 +229,16 @@ public void onPanelSlide(View panel, float slideOffset) {
             }
         });
 
-        RecyclerView recyclerView = findViewById(R.id.diagnostic_list_view);
-        DiagnosticView diagnosticView = new DiagnosticView(recyclerView, this);
-        mDiagnosticPresenter = new DiagnosticPresenter(diagnosticView, this, mTabManager);
+        FragmentManager fm = getSupportFragmentManager();
+        String tag = DiagnosticFragment.class.getSimpleName();
+        DiagnosticFragment diagnosticFragment = (DiagnosticFragment)
+                fm.findFragmentByTag(tag);
+        if (diagnosticFragment == null) {
+            diagnosticFragment = DiagnosticFragment.newInstance();
+        }
+        fm.beginTransaction().replace(R.id.container_diagnostic_list_view, diagnosticFragment, tag)
+                .commit();
+        mDiagnosticPresenter = new DiagnosticPresenter(diagnosticFragment, this, mTabManager);
     }
 
     private void initToolbar() {

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

@@ -74,12 +74,12 @@
 
                 </LinearLayout>
 
-                <android.support.v7.widget.RecyclerView
-                    android:id="@+id/diagnostic_list_view"
+                <FrameLayout
+                    android:id="@+id/container_diagnostic_list_view"
                     android:layout_width="match_parent"
                     android:layout_height="200dp">
 
-                </android.support.v7.widget.RecyclerView>
+                </FrameLayout>
             </LinearLayout>
 
         </com.sothree.slidinguppanel.SlidingUpPanelLayout>

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

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2018 Mr Duy
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/diagnostic_list_view"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</android.support.v7.widget.RecyclerView>