Android: Don't use SettingsAdapter's static state in file picker

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/activities/CustomFilePickerActivity.java

@@ -1,5 +1,7 @@
 package org.dolphinemu.dolphinemu.activities;
 
+import android.content.Intent;
+import android.os.Bundle;
 import android.os.Environment;
 
 import androidx.annotation.Nullable;
@@ -10,21 +12,38 @@ import com.nononsenseapps.filepicker.FilePickerActivity;
 import org.dolphinemu.dolphinemu.fragments.CustomFilePickerFragment;
 
 import java.io.File;
+import java.util.HashSet;
 
 public class CustomFilePickerActivity extends FilePickerActivity
-
 {
+  public static final String EXTRA_EXTENSIONS = "dolphinemu.org.filepicker.extensions";
+
+  private HashSet<String> mExtensions;
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState)
+  {
+    super.onCreate(savedInstanceState);
+
+    Intent intent = getIntent();
+    if (intent != null)
+    {
+      mExtensions = (HashSet<String>) intent.getSerializableExtra(EXTRA_EXTENSIONS);
+    }
+  }
+
   @Override
   protected AbstractFilePickerFragment<File> getFragment(
           @Nullable final String startPath, final int mode, final boolean allowMultiple,
           final boolean allowCreateDir, final boolean allowExistingFile,
           final boolean singleClick)
   {
-    AbstractFilePickerFragment<File> fragment = new CustomFilePickerFragment();
+    CustomFilePickerFragment fragment = new CustomFilePickerFragment();
     // startPath is allowed to be null. In that case, default folder should be SD-card and not "/"
     fragment.setArgs(
             startPath != null ? startPath : Environment.getExternalStorageDirectory().getPath(),
             mode, allowMultiple, allowCreateDir, allowExistingFile, singleClick);
+    fragment.setExtensions(mExtensions);
     return fragment;
   }
 }

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/activities/EmulationActivity.java

@@ -633,7 +633,8 @@ public final class EmulationActivity extends AppCompatActivity
         return;
 
       case MENU_ACTION_CHANGE_DISC:
-        FileBrowserHelper.openFilePicker(this, REQUEST_CHANGE_DISC, false);
+        FileBrowserHelper.openFilePicker(this, REQUEST_CHANGE_DISC, false,
+                FileBrowserHelper.GAME_EXTENSIONS);
         return;
 
       case MENU_SET_IR_SENSITIVITY:

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsActivity.java

@@ -176,9 +176,6 @@ public final class SettingsActivity extends AppCompatActivity implements Setting
         Toast.makeText(this, "Saved settings to INI files", Toast.LENGTH_SHORT).show();
       }
     }
-    // Clear static variables for File Picker activities that don't set extensions.
-    SettingsAdapter.sFilePicker = null;
-    SettingsAdapter.sItem = null;
 
     // TODO: After result of FilePicker, duplicate SettingsActivity appears.
     //  Finish to avoid this. Is there a better method?

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsAdapter.java

@@ -47,11 +47,9 @@ import org.dolphinemu.dolphinemu.ui.main.MainPresenter;
 import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
 import org.dolphinemu.dolphinemu.utils.Log;
 
+import java.security.InvalidParameterException;
 import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
 import java.util.HashSet;
-import java.util.Set;
 
 public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolder>
         implements DialogInterface.OnClickListener, SeekBar.OnSeekBarChangeListener
@@ -67,13 +65,9 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
   private AlertDialog mDialog;
   private TextView mTextSliderValue;
 
-  public static FilePicker sFilePicker;
+  // TODO: Properly restore these two on activity recreation
-  public static SettingsItem sItem;
+  private static FilePicker sFilePicker;
-
+  private static SettingsItem sItem;
-  private static final Set<String> gameExtensions = new HashSet<>(Arrays.asList(
-          "gcm", "tgc", "iso", "ciso", "gcz", "wbfs", "wad", "dol", "elf", "dff"));
-
-  private static final Set<String> SDExtensions = new HashSet<>(Collections.singletonList("raw"));
 
   public SettingsAdapter(SettingsFragmentView view, Context context)
   {
@@ -305,7 +299,7 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
     sFilePicker = (FilePicker) item;
     sItem = item;
 
-    FileBrowserHelper.openDirectoryPicker(mView.getActivity());
+    FileBrowserHelper.openDirectoryPicker(mView.getActivity(), FileBrowserHelper.GAME_EXTENSIONS);
   }
 
   public void onFilePickerFileClick(SettingsItem item)
@@ -313,7 +307,21 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
     sFilePicker = (FilePicker) item;
     sItem = item;
 
-    FileBrowserHelper.openFilePicker(mView.getActivity(), sFilePicker.getRequestType(), false);
+    HashSet<String> extensions;
+    switch (sFilePicker.getRequestType())
+    {
+      case MainPresenter.REQUEST_SD_FILE:
+        extensions = FileBrowserHelper.RAW_EXTENSION;
+        break;
+      case MainPresenter.REQUEST_GAME_FILE:
+        extensions = FileBrowserHelper.GAME_EXTENSIONS;
+        break;
+      default:
+        throw new InvalidParameterException("Unhandled request code");
+    }
+
+    FileBrowserHelper.openFilePicker(mView.getActivity(), sFilePicker.getRequestType(), false,
+            extensions);
   }
 
   public static void onFilePickerConfirmation(String file)
@@ -340,25 +348,6 @@ public final class SettingsAdapter extends RecyclerView.Adapter<SettingViewHolde
     NativeLibrary.ReloadConfig();
   }
 
-  public static Set<String> getExtensions()
-  {
-    try
-    {
-      if (sFilePicker.getRequestType() == MainPresenter.REQUEST_SD_FILE)
-      {
-        return SDExtensions;
-      }
-      else
-      {
-        return gameExtensions;
-      }
-    }
-    catch (NullPointerException ex)
-    {
-      return gameExtensions;
-    }
-  }
-
   @Override
   public void onClick(DialogInterface dialog, int which)
   {

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/CustomFilePickerFragment.java

@@ -10,14 +10,28 @@ import android.view.View;
 import android.widget.TextView;
 
 import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.features.settings.ui.SettingsAdapter;
 
 import com.nononsenseapps.filepicker.FilePickerFragment;
 
 import java.io.File;
+import java.util.HashSet;
 
 public class CustomFilePickerFragment extends FilePickerFragment
 {
+  public static final String KEY_EXTENSIONS = "KEY_EXTENSIONS";
+
+  private HashSet<String> mExtensions;
+
+  public void setExtensions(HashSet<String> extensions)
+  {
+    Bundle b = getArguments();
+    if (b == null)
+      b = new Bundle();
+
+    b.putSerializable(KEY_EXTENSIONS, extensions);
+    setArguments(b);
+  }
+
   @NonNull
   @Override
   public Uri toUri(@NonNull final File file)
@@ -32,6 +46,8 @@ public class CustomFilePickerFragment extends FilePickerFragment
   {
     super.onActivityCreated(savedInstanceState);
 
+    mExtensions = (HashSet<String>) getArguments().getSerializable(KEY_EXTENSIONS);
+
     if (mode == MODE_DIR)
     {
       TextView ok = getActivity().findViewById(R.id.nnf_button_ok);
@@ -51,8 +67,7 @@ public class CustomFilePickerFragment extends FilePickerFragment
 
     return (showHiddenItems || !file.isHidden()) &&
             (file.isDirectory() ||
-                    SettingsAdapter.getExtensions()
+                    mExtensions.contains(fileExtension(file.getName()).toLowerCase()));
-                            .contains(fileExtension(file.getName()).toLowerCase()));
   }
 
   @Override

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainActivity.java

@@ -145,13 +145,14 @@ public final class MainActivity extends AppCompatActivity implements MainView
   @Override
   public void launchFileListActivity()
   {
-    FileBrowserHelper.openDirectoryPicker(this);
+    FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS);
   }
 
   @Override
   public void launchOpenFileActivity()
   {
-    FileBrowserHelper.openFilePicker(this, MainPresenter.REQUEST_GAME_FILE, false);
+    FileBrowserHelper.openFilePicker(this, MainPresenter.REQUEST_GAME_FILE, false,
+            FileBrowserHelper.GAME_EXTENSIONS);
   }
 
   /**

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/TvMainActivity.java

@@ -142,13 +142,14 @@ public final class TvMainActivity extends FragmentActivity implements MainView
   @Override
   public void launchFileListActivity()
   {
-    FileBrowserHelper.openDirectoryPicker(this);
+    FileBrowserHelper.openDirectoryPicker(this, FileBrowserHelper.GAME_EXTENSIONS);
   }
 
   @Override
   public void launchOpenFileActivity()
   {
-    FileBrowserHelper.openFilePicker(this, MainPresenter.REQUEST_GAME_FILE, false);
+    FileBrowserHelper.openFilePicker(this, MainPresenter.REQUEST_GAME_FILE, false,
+            FileBrowserHelper.GAME_EXTENSIONS);
   }
 
   @Override

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/FileBrowserHelper.java

@@ -14,11 +14,20 @@ import org.dolphinemu.dolphinemu.activities.CustomFilePickerActivity;
 import org.dolphinemu.dolphinemu.ui.main.MainPresenter;
 
 import java.io.File;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 
 public final class FileBrowserHelper
 {
-  public static void openDirectoryPicker(FragmentActivity activity)
+  public static final HashSet<String> GAME_EXTENSIONS = new HashSet<>(Arrays.asList(
+          "gcm", "tgc", "iso", "ciso", "gcz", "wbfs", "wad", "dol", "elf", "dff"));
+
+  public static final HashSet<String> RAW_EXTENSION = new HashSet<>(Collections.singletonList(
+          "raw"));
+
+  public static void openDirectoryPicker(FragmentActivity activity, HashSet<String> extensions)
   {
     Intent i = new Intent(activity, CustomFilePickerActivity.class);
 
@@ -27,11 +36,13 @@ public final class FileBrowserHelper
     i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR);
     i.putExtra(FilePickerActivity.EXTRA_START_PATH,
             Environment.getExternalStorageDirectory().getPath());
+    i.putExtra(CustomFilePickerActivity.EXTRA_EXTENSIONS, extensions);
 
     activity.startActivityForResult(i, MainPresenter.REQUEST_DIRECTORY);
   }
 
-  public static void openFilePicker(FragmentActivity activity, int requestCode, boolean allowMulti)
+  public static void openFilePicker(FragmentActivity activity, int requestCode, boolean allowMulti,
+          HashSet<String> extensions)
   {
     Intent i = new Intent(activity, CustomFilePickerActivity.class);
 
@@ -40,6 +51,7 @@ public final class FileBrowserHelper
     i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_FILE);
     i.putExtra(FilePickerActivity.EXTRA_START_PATH,
             Environment.getExternalStorageDirectory().getPath());
+    i.putExtra(CustomFilePickerActivity.EXTRA_EXTENSIONS, extensions);
 
     activity.startActivityForResult(i, requestCode);
   }