Add a QuickViewFragment and buttons for it

app/build.gradle

@@ -42,6 +42,10 @@ android {
                               "room.expandProjection": "true"]
             }
         }
+
+        //For Dimezis/BlurView
+        renderscriptTargetApi 29 //must match target sdk and build tools
+        renderscriptSupportModeEnabled true
     }
 
     signingConfigs {
@@ -124,13 +128,16 @@ dependencies {
 
     implementation 'androidx.vectordrawable:vectordrawable-animated:1.1.0'
     implementation 'androidx.legacy:legacy-support-v13:1.0.0'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation "com.google.android.material:material:$androidMaterialVersion"
     implementation "androidx.fragment:fragment-ktx:$androidXFragmentVersion"
     implementation "androidx.appcompat:appcompat:$androidXAppCompatVersion"
     implementation 'androidx.palette:palette-ktx:1.0.0'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation "androidx.room:room-runtime:$roomVersion"
     implementation "com.android.billingclient:billing:$androidBillingVersion"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$androidXLifecycleVersion"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$androidXLifecycleVersion"
     kapt "androidx.room:room-compiler:$roomVersion"
     // RxJava support for Room
     implementation "androidx.room:room-rxjava2:$roomVersion"
@@ -250,6 +257,10 @@ dependencies {
     implementation "androidx.core:core-ktx:$kotlin_version"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation "ch.acra:acra-core:5.7.0"
+
+    //For blurring quickview background
+    implementation 'com.eightbitlab:blurview:1.6.6'
+    implementation 'com.eightbitlab:supportrenderscriptblur:1.0.2'
 }
 
 configurations.all {

app/src/main/java/com/amaze/filemanager/adapters/RecyclerAdapter.java

@@ -33,6 +33,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import com.amaze.filemanager.BuildConfig;
 import com.amaze.filemanager.GlideApp;
 import com.amaze.filemanager.R;
 import com.amaze.filemanager.adapters.data.IconDataParcelable;
@@ -50,6 +51,7 @@
 import com.amaze.filemanager.ui.drag.RecyclerAdapterDragListener;
 import com.amaze.filemanager.ui.fragments.MainFragment;
 import com.amaze.filemanager.ui.fragments.preference_fragments.PreferencesConstants;
+import com.amaze.filemanager.ui.fragments.quickview.HasQuickView;
 import com.amaze.filemanager.ui.icons.Icons;
 import com.amaze.filemanager.ui.icons.MimeTypes;
 import com.amaze.filemanager.ui.provider.UtilitiesProvider;
@@ -733,6 +735,12 @@ public void onBindViewHolder(final RecyclerView.ViewHolder vholder, int p) {
               return true;
             });
 
+        if (HasQuickView.hasQuickView(rowItem.filetype) && BuildConfig.DEBUG) {
+          holder.quickView.setVisibility(View.VISIBLE);
+          final View.OnClickListener listener = v -> mainFrag.onQuickViewClicked(rowItem);
+          holder.quickView.setOnClickListener(listener);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
           holder.checkImageView.setBackground(
               new CircleGradientDrawable(
@@ -910,6 +918,11 @@ && getBoolean(PREFERENCE_SHOW_THUMB))) {
               mainFrag.onListItemClicked(
                   isBackButton, vholder.getAdapterPosition(), rowItem, holder.checkImageViewGrid);
             });
+        if (HasQuickView.hasQuickView(rowItem.filetype) && BuildConfig.DEBUG) {
+          holder.quickView.setVisibility(View.VISIBLE);
+          final View.OnClickListener listener = v -> mainFrag.onQuickViewClicked(rowItem);
+          holder.quickView.setOnClickListener(listener);
+        }
         holder.txtTitle.setText(rowItem.title);
         holder.imageView1.setVisibility(View.INVISIBLE);
         holder.genericIcon.setVisibility(View.VISIBLE);

app/src/main/java/com/amaze/filemanager/adapters/data/IconDataParcelable.java

@@ -20,10 +20,16 @@
 
 package com.amaze.filemanager.adapters.data;
 
+import com.amaze.filemanager.GlideRequests;
+import com.bumptech.glide.RequestBuilder;
+import com.bumptech.glide.load.engine.DiskCacheStrategy;
+
+import android.graphics.drawable.Drawable;
 import android.os.Parcel;
 import android.os.Parcelable;
 
 import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
 
 /**
  * Saves data on what should be loaded as an icon for LayoutElementParcelable
@@ -64,6 +70,22 @@ public void setImageBroken(boolean imageBroken) {
     isImageBroken = imageBroken;
   }
 
+  /**
+   * This is hack to load this icon to a request: The problem is that cloud icons cannot be cached.
+   */
+  @NonNull
+  public RequestBuilder<Drawable> getPreloadRequestBuilder(@NonNull GlideRequests request) {
+    if (type == IconDataParcelable.IMAGE_FROMFILE) {
+      return request.load(path);
+    }
+
+    if (type == IconDataParcelable.IMAGE_FROMCLOUD) {
+      return request.load(path).diskCacheStrategy(DiskCacheStrategy.NONE);
+    }
+
+    return request.load(image);
+  }
+
   @Override
   public int describeContents() {
     return 0;

app/src/main/java/com/amaze/filemanager/adapters/glide/RecyclerPreloadModelProvider.java

@@ -24,11 +24,11 @@
 import java.util.List;
 
 import com.amaze.filemanager.GlideApp;
-import com.amaze.filemanager.GlideRequest;
+import com.amaze.filemanager.GlideRequests;
 import com.amaze.filemanager.adapters.data.IconDataParcelable;
 import com.bumptech.glide.ListPreloader;
 import com.bumptech.glide.RequestBuilder;
-import com.bumptech.glide.load.engine.DiskCacheStrategy;
+import com.bumptech.glide.request.RequestOptions;
 
 import android.graphics.drawable.Drawable;
 
@@ -41,17 +41,18 @@ public class RecyclerPreloadModelProvider
     implements ListPreloader.PreloadModelProvider<IconDataParcelable> {
 
   private final List<IconDataParcelable> urisToLoad;
-  private final GlideRequest<Drawable> request;
+  private final GlideRequests requests;
+  private final RequestOptions cropOptions;
 
   public RecyclerPreloadModelProvider(
       @NonNull Fragment fragment, @NonNull List<IconDataParcelable> uris, boolean isCircled) {
     urisToLoad = uris;
-    GlideRequest<Drawable> incompleteRequest = GlideApp.with(fragment).asDrawable();
+    requests = GlideApp.with(fragment);
 
     if (isCircled) {
-      request = incompleteRequest.circleCrop();
+      cropOptions = new RequestOptions().circleCrop();
     } else {
-      request = incompleteRequest.centerCrop();
+      cropOptions = new RequestOptions().centerCrop();
     }
   }
 
@@ -66,14 +67,6 @@ public List<IconDataParcelable> getPreloadItems(int position) {
   @Override
   @Nullable
   public RequestBuilder<Drawable> getPreloadRequestBuilder(IconDataParcelable iconData) {
-    RequestBuilder<Drawable> requestBuilder;
-    if (iconData.type == IconDataParcelable.IMAGE_FROMFILE) {
-      requestBuilder = request.load(iconData.path);
-    } else if (iconData.type == IconDataParcelable.IMAGE_FROMCLOUD) {
-      requestBuilder = request.load(iconData.path).diskCacheStrategy(DiskCacheStrategy.NONE);
-    } else {
-      requestBuilder = request.load(iconData.image);
-    }
-    return requestBuilder;
+    return iconData.getPreloadRequestBuilder(requests).apply(cropOptions);
   }
 }

app/src/main/java/com/amaze/filemanager/adapters/holders/ItemViewHolder.kt

@@ -68,6 +68,9 @@ class ItemViewHolder(view: View) : RecyclerView.ViewHolder(view) {
     @JvmField
     val about: ImageButton = view.findViewById(R.id.properties)
 
+    @JvmField
+    val quickView: ImageButton = view.findViewById(R.id.quickView)
+
     @JvmField
     val checkImageView: ImageView? = view.findViewById(R.id.check_icon)
 

app/src/main/java/com/amaze/filemanager/ui/activities/MainActivity.java

@@ -114,6 +114,7 @@
 import com.amaze.filemanager.ui.fragments.SearchWorkerFragment;
 import com.amaze.filemanager.ui.fragments.TabFragment;
 import com.amaze.filemanager.ui.fragments.preference_fragments.PreferencesConstants;
+import com.amaze.filemanager.ui.fragments.quickview.QuickViewFragment;
 import com.amaze.filemanager.ui.strings.StorageNamingHelper;
 import com.amaze.filemanager.ui.views.CustomZoomFocusChange;
 import com.amaze.filemanager.ui.views.appbar.AppBar;
@@ -203,6 +204,7 @@ public class MainActivity extends PermissionsActivity
 
   public static final Pattern DIR_SEPARATOR = Pattern.compile("/");
   public static final String TAG_ASYNC_HELPER = "async_helper";
+  public static final String TAG_QUICK_VIEW_FRAGMENT = "quick_view_fragment";
 
   private DataUtils dataUtils;
 
@@ -829,6 +831,14 @@ public synchronized ArrayList<StorageDirectoryParcelable> getStorageDirectoriesL
 
   @Override
   public void onBackPressed() {
+    Fragment quickViewFragment =
+        getSupportFragmentManager().findFragmentById(R.id.quickViewContainer);
+
+    if (quickViewFragment != null) {
+      ((QuickViewFragment) quickViewFragment).onBackPressed();
+      return;
+    }
+
     if (!drawer.isLocked() && drawer.isOpen()) {
       drawer.close();
       return;

app/src/main/java/com/amaze/filemanager/ui/fragments/MainFragment.java

@@ -40,6 +40,7 @@
 import com.afollestad.materialdialogs.MaterialDialog;
 import com.amaze.filemanager.R;
 import com.amaze.filemanager.adapters.RecyclerAdapter;
+import com.amaze.filemanager.adapters.data.IconDataParcelable;
 import com.amaze.filemanager.adapters.data.LayoutElementParcelable;
 import com.amaze.filemanager.adapters.holders.ItemViewHolder;
 import com.amaze.filemanager.application.AppConfig;
@@ -67,6 +68,9 @@
 import com.amaze.filemanager.ui.drag.RecyclerAdapterDragListener;
 import com.amaze.filemanager.ui.drag.TabFragmentBottomDragListener;
 import com.amaze.filemanager.ui.fragments.data.MainFragmentViewModel;
+import com.amaze.filemanager.ui.fragments.quickview.QuickViewFragment;
+import com.amaze.filemanager.ui.fragments.quickview.types.QuickViewImage;
+import com.amaze.filemanager.ui.fragments.quickview.types.QuickViewType;
 import com.amaze.filemanager.ui.icons.MimeTypes;
 import com.amaze.filemanager.ui.provider.UtilitiesProvider;
 import com.amaze.filemanager.ui.selection.SelectionPopupMenu;
@@ -558,6 +562,8 @@ public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 
         // called when the user selects a contextual menu item
         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+          assureNoQuickView();
+
           computeScroll();
           ArrayList<LayoutElementParcelable> checkedItems = adapter.getCheckedItems();
           switch (item.getItemId()) {
@@ -736,6 +742,28 @@ public void onDestroyActionMode(ActionMode mode) {
         }
       };
 
+  /** When TabFragment detects this fragment is in view it calls this method */
+  public void onWorkspaceSelected() {
+    if (getCurrentPath() != null) {
+      getMainActivity().getDrawer().selectCorrectDrawerItemForPath(getCurrentPath());
+    }
+
+    final QuickViewFragment quickViewFragment = getCurrentQuickView();
+
+    if (quickViewFragment != null) {
+      quickViewFragment.runOpenVisibilityChanges();
+    }
+  }
+
+  /** When TabFragment detects this fragment is not in view it calls this method */
+  public void onWorkspaceUnselected() {
+    final QuickViewFragment quickViewFragment = getCurrentQuickView();
+
+    if (quickViewFragment != null) {
+      quickViewFragment.runExitVisibilityChanges();
+    }
+  }
+
   private BroadcastReceiver receiver2 =
       new BroadcastReceiver() {
 
@@ -908,6 +936,33 @@ public void onListItemClicked(
     }
   }
 
+  public void onQuickViewClicked(LayoutElementParcelable layoutElementParcelable) {
+    final IconDataParcelable iconData = layoutElementParcelable.iconData;
+
+    final QuickViewType quickViewType = new QuickViewImage(iconData, layoutElementParcelable.title);
+    final QuickViewFragment fragment = QuickViewFragment.newInstance(quickViewType);
+
+    getChildFragmentManager()
+        .beginTransaction()
+        .replace(R.id.quickViewContainer, fragment, MainActivity.TAG_QUICK_VIEW_FRAGMENT)
+        .commit();
+  }
+
+  private void assureNoQuickView() {
+    QuickViewFragment fragment = getCurrentQuickView();
+
+    if (fragment == null) {
+      return;
+    }
+
+    fragment.exit();
+  }
+
+  @Nullable
+  private QuickViewFragment getCurrentQuickView() {
+    return (QuickViewFragment) getChildFragmentManager().findFragmentById(R.id.quickViewContainer);
+  }
+
   public void updateTabWithDb(Tab tab) {
     mainFragmentViewModel.setCurrentPath(tab.path);
     mainFragmentViewModel.setHome(tab.home);

app/src/main/java/com/amaze/filemanager/ui/fragments/TabFragment.java

@@ -64,7 +64,7 @@
 /** Created by Arpit on 15-12-2014. */
 public class TabFragment extends Fragment implements ViewPager.OnPageChangeListener {
 
-  public List<Fragment> fragments = new ArrayList<>();
+  public List<Fragment> fragments = new ArrayList<>(2);
   public ScreenSlidePagerAdapter mSectionsPagerAdapter;
   public DisablableViewPager mViewPager;
 
@@ -265,7 +265,7 @@ public void onPageScrolled(int position, float positionOffset, int positionOffse
   }
 
   @Override
-  public void onPageSelected(int p1) {
+  public void onPageSelected(int selectedTabId) {
     mainActivity
         .getAppbar()
         .getAppbarLayout()
@@ -274,7 +274,7 @@ public void onPageSelected(int p1) {
         .setInterpolator(new DecelerateInterpolator(2))
         .start();
 
-    MainActivity.currentTab = p1;
+    MainActivity.currentTab = selectedTabId;
 
     if (sharedPrefs != null) {
       sharedPrefs
@@ -283,19 +283,25 @@ public void onPageSelected(int p1) {
           .apply();
     }
 
-    //        Log.d(getClass().getSimpleName(), "Page Selected: " + MainActivity.currentTab, new
-    // Exception());
+    Fragment notInView = fragments.get(selectedTabId == 0 ? 1 : 0);
+    if (notInView instanceof MainFragment) {
+      ((MainFragment) notInView).onWorkspaceUnselected();
+    }
+
+    Fragment inView = fragments.get(selectedTabId);
+    if (inView instanceof MainFragment) {
+      MainFragment mainFragment = (MainFragment) inView;
 
-    Fragment fragment = fragments.get(p1);
-    if (fragment != null && fragment instanceof MainFragment) {
-      MainFragment ma = (MainFragment) fragment;
-      if (ma.getCurrentPath() != null) {
-        mainActivity.getDrawer().selectCorrectDrawerItemForPath(ma.getCurrentPath());
-        updateBottomBar(ma);
+      if (mainFragment.getCurrentPath() != null) {
+        updateBottomBar(mainFragment);
       }
+
+      ((MainFragment) inView).onWorkspaceSelected();
     }
 
-    if (circleDrawable1 != null && circleDrawable2 != null) updateIndicator(p1);
+    if (circleDrawable1 != null && circleDrawable2 != null) {
+      updateIndicator(selectedTabId);
+    }
   }
 
   @Override