Add elevation effect stuff to a base class for all fragments that need it

mastodon/src/main/java/org/joinmastodon/android/fragments/BaseStatusListFragment.java

@@ -58,7 +58,6 @@ import androidx.annotation.Nullable;
 import androidx.recyclerview.widget.RecyclerView;
 import me.grishka.appkit.api.Callback;
 import me.grishka.appkit.api.ErrorResponse;
-import me.grishka.appkit.fragments.BaseRecyclerFragment;
 import me.grishka.appkit.imageloader.ImageLoaderRecyclerAdapter;
 import me.grishka.appkit.imageloader.ImageLoaderViewHolder;
 import me.grishka.appkit.imageloader.requests.ImageLoaderRequest;
@@ -66,7 +65,7 @@ import me.grishka.appkit.utils.BindableViewHolder;
 import me.grishka.appkit.utils.V;
 import me.grishka.appkit.views.UsableRecyclerView;
 
-public abstract class BaseStatusListFragment<T extends DisplayItemsParent> extends BaseRecyclerFragment<T> implements PhotoViewerHost, ScrollableToTop{
+public abstract class BaseStatusListFragment<T extends DisplayItemsParent> extends MastodonRecyclerFragment<T> implements PhotoViewerHost, ScrollableToTop{
 	protected ArrayList<StatusDisplayItem> displayItems=new ArrayList<>();
 	protected DisplayItemsAdapter adapter;
 	protected String accountID;

mastodon/src/main/java/org/joinmastodon/android/fragments/MastodonRecyclerFragment.java

@@ -0,0 +1,52 @@
+package org.joinmastodon.android.fragments;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Toolbar;
+
+import org.joinmastodon.android.utils.ElevationOnScrollListener;
+
+import java.util.Collections;
+import java.util.List;
+
+import androidx.annotation.CallSuper;
+import me.grishka.appkit.fragments.BaseRecyclerFragment;
+import me.grishka.appkit.views.FragmentRootLinearLayout;
+
+public abstract class MastodonRecyclerFragment<T> extends BaseRecyclerFragment<T>{
+	protected ElevationOnScrollListener elevationOnScrollListener;
+
+	public MastodonRecyclerFragment(int perPage){
+		super(perPage);
+	}
+
+	public MastodonRecyclerFragment(int layout, int perPage){
+		super(layout, perPage);
+	}
+
+	protected List<View> getViewsForElevationEffect(){
+		Toolbar toolbar=getToolbar();
+		return toolbar!=null ? Collections.singletonList(toolbar) : Collections.emptyList();
+	}
+
+	@Override
+	@CallSuper
+	public void onViewCreated(View view, Bundle savedInstanceState){
+		super.onViewCreated(view, savedInstanceState);
+		if(wantsElevationOnScrollEffect())
+			list.addOnScrollListener(elevationOnScrollListener=new ElevationOnScrollListener((FragmentRootLinearLayout) view, getViewsForElevationEffect()));
+	}
+
+	@Override
+	@CallSuper
+	protected void onUpdateToolbar(){
+		super.onUpdateToolbar();
+		if(elevationOnScrollListener!=null){
+			elevationOnScrollListener.setViews(getViewsForElevationEffect());
+		}
+	}
+
+	protected boolean wantsElevationOnScrollEffect(){
+		return true;
+	}
+}

mastodon/src/main/java/org/joinmastodon/android/fragments/account_list/BaseAccountListFragment.java

@@ -23,6 +23,7 @@ import org.joinmastodon.android.R;
 import org.joinmastodon.android.api.requests.accounts.GetAccountRelationships;
 import org.joinmastodon.android.api.requests.accounts.SetAccountFollowed;
 import org.joinmastodon.android.api.session.AccountSessionManager;
+import org.joinmastodon.android.fragments.MastodonRecyclerFragment;
 import org.joinmastodon.android.fragments.ProfileFragment;
 import org.joinmastodon.android.fragments.report.ReportReasonChoiceFragment;
 import org.joinmastodon.android.model.Account;
@@ -47,7 +48,6 @@ import me.grishka.appkit.Nav;
 import me.grishka.appkit.api.APIRequest;
 import me.grishka.appkit.api.Callback;
 import me.grishka.appkit.api.ErrorResponse;
-import me.grishka.appkit.fragments.BaseRecyclerFragment;
 import me.grishka.appkit.imageloader.ImageLoaderRecyclerAdapter;
 import me.grishka.appkit.imageloader.ImageLoaderViewHolder;
 import me.grishka.appkit.imageloader.requests.ImageLoaderRequest;
@@ -56,7 +56,7 @@ import me.grishka.appkit.utils.BindableViewHolder;
 import me.grishka.appkit.utils.V;
 import me.grishka.appkit.views.UsableRecyclerView;
 
-public abstract class BaseAccountListFragment extends BaseRecyclerFragment<BaseAccountListFragment.AccountItem>{
+public abstract class BaseAccountListFragment extends MastodonRecyclerFragment<BaseAccountListFragment.AccountItem>{
 	protected HashMap<String, Relationship> relationships=new HashMap<>();
 	protected String accountID;
 	protected ArrayList<APIRequest<?>> relationshipsRequests=new ArrayList<>();

mastodon/src/main/java/org/joinmastodon/android/fragments/onboarding/InstanceRulesFragment.java

@@ -2,20 +2,14 @@ package org.joinmastodon.android.fragments.onboarding;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.graphics.Typeface;
 import android.os.Build;
 import android.os.Bundle;
 import android.text.Html;
-import android.text.Spannable;
-import android.text.SpannableStringBuilder;
-import android.text.style.StyleSpan;
-import android.text.style.TypefaceSpan;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowInsets;
 import android.widget.Button;
-import android.widget.ImageView;
 import android.widget.TextView;
 
 import org.joinmastodon.android.R;

mastodon/src/main/java/org/joinmastodon/android/utils/ElevationOnScrollListener.java

@@ -5,7 +5,6 @@ import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.Context;
-import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
 import android.view.View;
@@ -26,10 +25,14 @@ import me.grishka.appkit.views.FragmentRootLinearLayout;
 public class ElevationOnScrollListener extends RecyclerView.OnScrollListener implements View.OnScrollChangeListener{
 	private boolean isAtTop;
 	private Animator currentPanelsAnim;
-	private View[] views;
+	private List<View> views;
 	private FragmentRootLinearLayout fragmentRootLayout;
 
 	public ElevationOnScrollListener(FragmentRootLinearLayout fragmentRootLayout, View... views){
+		this(fragmentRootLayout, Arrays.asList(views));
+	}
+
+	public ElevationOnScrollListener(FragmentRootLinearLayout fragmentRootLayout, List<View> views){
 		isAtTop=true;
 		this.fragmentRootLayout=fragmentRootLayout;
 		this.views=views;
@@ -46,7 +49,11 @@ public class ElevationOnScrollListener extends RecyclerView.OnScrollListener imp
 	}
 
 	public void setViews(View... views){
-		List<View> oldViews=Arrays.asList(this.views);
+		setViews(Arrays.asList(views));
+	}
+
+	public void setViews(List<View> views){
+		List<View> oldViews=this.views;
 		this.views=views;
 		for(View v:views){
 			if(oldViews.contains(v))