Made debug settings searchable (debug only)

* Consolidated main-setttings into a single file
* Debug settings are only enabled in the DEBUG build
* Moved LeakCanary (debug) specific stuff into a small class that's only shipped with the debug build
* Other minor fixes

app/src/main/java/org/schabi/newpipe/settings/DebugSettingsFragment.java

@@ -1,5 +1,6 @@
 package org.schabi.newpipe.settings;
 
+import android.content.Intent;
 import android.os.Bundle;
 
 import androidx.preference.Preference;
@@ -10,13 +11,15 @@ import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.util.PicassoHelper;
 
-import leakcanary.LeakCanary;
+import java.util.Optional;
 
 public class DebugSettingsFragment extends BasePreferenceFragment {
     @Override
     public void onCreatePreferences(final Bundle savedInstanceState, final String rootKey) {
-        addPreferencesFromResource(R.xml.debug_settings);
+        addPreferencesFromResourceRegistry();
 
+        final Preference allowHeapDumpingPreference
+                = findPreference(getString(R.string.allow_heap_dumping_key));
         final Preference showMemoryLeaksPreference
                 = findPreference(getString(R.string.show_memory_leaks_key));
         final Preference showImageIndicatorsPreference
@@ -28,16 +31,29 @@ public class DebugSettingsFragment extends BasePreferenceFragment {
         final Preference createErrorNotificationPreference
                 = findPreference(getString(R.string.create_error_notification_key));
 
+        assert allowHeapDumpingPreference != null;
         assert showMemoryLeaksPreference != null;
         assert showImageIndicatorsPreference != null;
         assert crashTheAppPreference != null;
         assert showErrorSnackbarPreference != null;
         assert createErrorNotificationPreference != null;
 
+        final Optional<DebugSettingsBVLeakCanaryAPI> optPDLeakCanary = getBVLeakCanary();
+
+        allowHeapDumpingPreference.setEnabled(optPDLeakCanary.isPresent());
+        showMemoryLeaksPreference.setEnabled(optPDLeakCanary.isPresent());
+
+        if (optPDLeakCanary.isPresent()) {
+            final DebugSettingsBVLeakCanaryAPI pdLeakCanary = optPDLeakCanary.get();
+
             showMemoryLeaksPreference.setOnPreferenceClickListener(preference -> {
-            startActivity(LeakCanary.INSTANCE.newLeakDisplayActivityIntent());
+                startActivity(pdLeakCanary.getNewLeakDisplayActivityIntent());
                 return true;
             });
+        } else {
+            allowHeapDumpingPreference.setSummary(R.string.leak_canary_not_available);
+            showMemoryLeaksPreference.setSummary(R.string.leak_canary_not_available);
+        }
 
         showImageIndicatorsPreference.setOnPreferenceChangeListener((preference, newValue) -> {
             PicassoHelper.setIndicatorsEnabled((Boolean) newValue);
@@ -60,4 +76,26 @@ public class DebugSettingsFragment extends BasePreferenceFragment {
             return true;
         });
     }
+
+    private Optional<DebugSettingsBVLeakCanaryAPI> getBVLeakCanary() {
+        try {
+            // Try to find the implementation of the LeakCanary API
+            return Optional.of((DebugSettingsBVLeakCanaryAPI)
+                    Class.forName(DebugSettingsBVLeakCanaryAPI.IMPL_CLASS).newInstance());
+        } catch (final ClassNotFoundException
+                | IllegalAccessException | java.lang.InstantiationException e) {
+            return Optional.empty();
+        }
+    }
+
+    /**
+     * Build variant dependent leak canary API for this fragment.
+     * Why is LeakCanary not used directly? Because it can't be assured
+     */
+    public interface DebugSettingsBVLeakCanaryAPI {
+        String IMPL_CLASS =
+                "org.schabi.newpipe.settings.DebugSettingsBVLeakCanary";
+
+        Intent getNewLeakDisplayActivityIntent();
+    }
 }

app/src/main/java/org/schabi/newpipe/settings/MainSettingsFragment.java

@@ -6,7 +6,6 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
-import androidx.preference.Preference;
 
 import org.schabi.newpipe.App;
 import org.schabi.newpipe.CheckForNewAppVersion;
@@ -26,12 +25,17 @@ public class MainSettingsFragment extends BasePreferenceFragment {
 
         // Check if the app is updatable
         if (!CheckForNewAppVersion.isReleaseApk(App.getApp())) {
-            final Preference update
+            getPreferenceScreen().removePreference(
-                    = findPreference(getString(R.string.update_pref_screen_key));
+                    findPreference(getString(R.string.update_pref_screen_key)));
-            getPreferenceScreen().removePreference(update);
 
             defaultPreferences.edit().putBoolean(getString(R.string.update_app_key), false).apply();
         }
+
+        // Hide debug preferences in RELEASE build variant
+        if (!DEBUG) {
+            getPreferenceScreen().removePreference(
+                    findPreference(getString(R.string.debug_pref_screen_key)));
+        }
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -217,6 +217,13 @@ public class SettingsActivity extends AppCompatActivity implements
                     .getEntryByPreferencesResId(R.xml.update_settings)
                     .setSearchable(false);
         }
+
+        // Hide debug preferences in RELEASE build variant
+        if (DEBUG) {
+            SettingsResourceRegistry.getInstance()
+                    .getEntryByPreferencesResId(R.xml.debug_settings)
+                    .setSearchable(true);
+        }
     }
 
     public void setMenuSearchItem(final MenuItem menuSearchItem) {

app/src/main/java/org/schabi/newpipe/settings/SettingsResourceRegistry.java

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.settings;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 import androidx.annotation.XmlRes;
 import androidx.fragment.app.Fragment;
 
@@ -34,6 +33,7 @@ public final class SettingsResourceRegistry {
 
         add(AppearanceSettingsFragment.class, R.xml.appearance_settings);
         add(ContentSettingsFragment.class, R.xml.content_settings);
+        add(DebugSettingsFragment.class, R.xml.debug_settings).setSearchable(false);
         add(DownloadSettingsFragment.class, R.xml.download_settings);
         add(HistorySettingsFragment.class, R.xml.history_settings);
         add(NotificationSettingsFragment.class, R.xml.notification_settings);
@@ -51,7 +51,6 @@ public final class SettingsResourceRegistry {
         return entry;
     }
 
-    @Nullable
     public SettingRegistryEntry getEntryByFragmentClass(
             final Class<? extends Fragment> fragmentClass
     ) {
@@ -62,7 +61,6 @@ public final class SettingsResourceRegistry {
                 .orElse(null);
     }
 
-    @Nullable
     public SettingRegistryEntry getEntryByPreferencesResId(@XmlRes final int preferencesResId) {
         return registeredEntries.stream()
                 .filter(e -> Objects.equals(e.getPreferencesResId(), preferencesResId))
@@ -78,7 +76,6 @@ public final class SettingsResourceRegistry {
         return entry.getPreferencesResId();
     }
 
-    @Nullable
     public Class<? extends Fragment> getFragmentClass(@XmlRes final int preferencesResId) {
         final SettingRegistryEntry entry = getEntryByPreferencesResId(preferencesResId);
         if (entry == null) {

app/src/main/res/values/strings.xml

@@ -441,6 +441,7 @@
     <string name="caption_setting_title">Captions</string>
     <string name="caption_setting_description">Modify player caption text scale and background styles. Requires app restart to take effect</string>
     <!-- Debug Settings -->
+    <string name="leak_canary_not_available">LeakCanary is not available</string>
     <string name="enable_leak_canary_summary">Memory leak monitoring may cause the app to become unresponsive when heap dumping</string>
     <string name="show_memory_leaks">Show memory leaks</string>
     <string name="enable_disposed_exceptions_title">Report out-of-lifecycle errors</string>

app/src/release/res/xml/main_settings.xml

@@ -1,49 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:key="general_preferences"
-    android:title="@string/settings">
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.VideoAudioSettingsFragment"
-        android:icon="@drawable/ic_headset"
-        android:title="@string/settings_category_video_audio_title"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.DownloadSettingsFragment"
-        android:icon="@drawable/ic_file_download"
-        android:title="@string/settings_category_downloads_title"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.AppearanceSettingsFragment"
-        android:icon="@drawable/ic_palette"
-        android:title="@string/settings_category_appearance_title"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.HistorySettingsFragment"
-        android:icon="@drawable/ic_history"
-        android:title="@string/settings_category_history_title"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.ContentSettingsFragment"
-        android:icon="@drawable/ic_language"
-        android:title="@string/content"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.NotificationSettingsFragment"
-        android:icon="@drawable/ic_play_arrow"
-        android:title="@string/settings_category_notification_title"
-        app:iconSpaceReserved="false" />
-
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.UpdateSettingsFragment"
-        android:icon="@drawable/ic_cloud_download"
-        android:key="update_pref_screen_key"
-        android:title="@string/settings_category_updates_title"
-        app:iconSpaceReserved="false" />
-</PreferenceScreen>