Version 6.1.0

- Bar hides if the recyclerView fits on the screen without scrolling.

- Hiding is done more efficiently

Author: turing-tech

lib/build.gradle

@@ -13,7 +13,7 @@ ext {
     siteUrl = 'https://github.com/krimin-killr21/MaterialScrollBar'
     gitUrl = 'https://github.com/krimin-killr21/MaterialScrollBar.git'
 
-    libraryVersion = '6.0'
+    libraryVersion = '6.1.0'
 
     developerId = 'krimin-killr21'
     developerName = 'Turing Technologies'
@@ -31,8 +31,8 @@ android {
     defaultConfig {
         minSdkVersion 7
         targetSdkVersion 23
-        versionCode 11
-        versionName "6.0"
+        versionCode 12
+        versionName "6.1.0"
     }
 }
 

lib/src/main/java/com/turingtechnologies/materialscrollbar/MaterialScrollBar.java

@@ -24,6 +24,8 @@
 import android.graphics.Color;
 import android.graphics.drawable.GradientDrawable;
 import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -54,46 +56,15 @@ public class MaterialScrollBar extends RelativeLayout {
     private boolean lightOnTouch;
     private boolean totallyHidden = false;
     MaterialScrollBar.ScrollListener scrollListener;
+    private Handler mUIHandler = new Handler(Looper.getMainLooper());
 
-    //Thread which checks every 1/10th of a second to decide if the scrollBar should slide away.
-    class BarFade extends Thread {
-
-        MaterialScrollBar materialScrollBar;
-
-        BarFade(MaterialScrollBar msb){
-            materialScrollBar = msb;
-        }
-
-        //Variable which is later set to indicate the time after which the scrollBar should disappear
-        long time = 0;
-
-        //Variable which is set to false when dragging is occurring and true when dragging is stopped.
-        boolean run = false;
-        boolean held = false;
+    private Runnable mFadeBar = new Runnable() {
 
         @Override
         public void run() {
-            try{
-                while(true){
-                    //Is it past the time where the bar should be animated away AND is no scrolling occurring?
-                    if(run && !held && time <= System.currentTimeMillis()){
-                        run = false;
-                        materialScrollBar.a.runOnUiThread(new Runnable() {
-                            @Override
-                            public void run() {
-                                materialScrollBar.fadeOut();
-                            }
-                        });
-                    }
-                    Thread.sleep(100);
-                }
-            } catch (InterruptedException e){
-                e.printStackTrace();
-            }
+            fadeOut();
         }
-    }
-
-    private BarFade fade;
+    };
 
     /**
      * For testing only. Should not generally be accessed.
@@ -125,7 +96,7 @@ public MaterialScrollBar(Context context, RecyclerView recyclerView, boolean lig
         LayoutParams lp = new RelativeLayout.LayoutParams(Utils.getDP(12, this), LayoutParams.MATCH_PARENT);
         lp.addRule(ALIGN_PARENT_RIGHT);
         background.setLayoutParams(lp);
-        background.setBackgroundColor(getResources().getColor(android.R.color.darker_gray));
+        background.setBackgroundColor(ContextCompat.getColor(context, android.R.color.darker_gray));
         ViewHelper.setAlpha(background, 0.4F);
 
         handle = new View(context);
@@ -163,9 +134,6 @@ public MaterialScrollBar(Context context, RecyclerView recyclerView, boolean lig
 
         setTouchIntercept();
 
-        fade = new BarFade(this);
-        fade.start();
-
         TranslateAnimation anim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_SELF, 1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
         anim.setFillAfter(true);
         startAnimation(anim);
@@ -188,8 +156,7 @@ public boolean onTouch(View v, MotionEvent event) {
                             handle.setBackgroundColor(handleColour);
                         }
 
-                        fade.held = true;
-
+                        mUIHandler.removeCallbacks(mFadeBar);
                         fadeIn();
                     } else {
                         if(indicator != null && indicator.getVisibility() == VISIBLE){
@@ -204,10 +171,9 @@ public boolean onTouch(View v, MotionEvent event) {
                         }
 
                         if (hide) {
-                            fade.run = true;
-                            fade.time = System.currentTimeMillis() + hideDuration;
+                            mUIHandler.removeCallbacks(mFadeBar);
+                            mUIHandler.postDelayed(mFadeBar, hideDuration);
                         }
-                        fade.held = false;
                     }
                     return true;
                 }
@@ -371,12 +337,10 @@ public MaterialScrollBar setTextColour(String colour){
      */
     public MaterialScrollBar setAutoHide(Boolean hide){
         if(!hide){
-            fade.interrupt();
+            mUIHandler.removeCallbacks(mFadeBar);
             TranslateAnimation anim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
             anim.setFillAfter(true);
             startAnimation(anim);
-        } else if (!this.hide){
-            fade.start();
         }
         this.hide = hide;
         return this;
@@ -518,11 +482,27 @@ public void onScrollStateChanged(final RecyclerView recyclerView, int newState)
 
             if(hide){
                 if(newState == RecyclerView.SCROLL_STATE_IDLE){
-                    fade.time = System.currentTimeMillis() + hideDuration;
-                    fade.run = true;
+                    mUIHandler.removeCallbacks(mFadeBar);
+                    mUIHandler.postDelayed(mFadeBar, hideDuration);
                 } else if (newState == RecyclerView.SCROLL_STATE_DRAGGING) {
-                    fade.run = false;
-                    materialScrollBar.fadeIn();
+                    if(Build.VERSION.SDK_INT >= 14){
+                        if (recyclerView.canScrollVertically(1) || recyclerView.canScrollVertically(-1) || recyclerView.canScrollHorizontally(1) || recyclerView.canScrollHorizontally(-1)) {
+                            mUIHandler.removeCallbacks(mFadeBar);
+                            materialScrollBar.fadeIn();
+                        }
+                    } else {
+                        View visibleChild = recyclerView.getChildAt(0);
+                        RecyclerView.ViewHolder holder = recyclerView.getChildViewHolder(visibleChild);
+                        int itemHeight = holder.itemView.getHeight();
+                        int recyclerHeight = recyclerView.getHeight();
+                        int itemsInWindow = recyclerHeight / itemHeight;
+
+                        int numItemsInList = recyclerView.getAdapter().getItemCount();
+                        if(numItemsInList > itemsInWindow){
+                            mUIHandler.removeCallbacks(mFadeBar);
+                            materialScrollBar.fadeIn();
+                        }
+                    }
                 }
             }
         }