Create methods to verify ellipsized title.

multiline-collapsingtoolbar/src/main/java/net/opacapp/multilinecollapsingtoolbar/CollapsingTextHelper.java

@@ -910,4 +910,8 @@ private static float lerp(float startValue, float endValue, float fraction,
     private static boolean rectEquals(Rect r, int left, int top, int right, int bottom) {
         return !(r.left != left || r.top != top || r.right != right || r.bottom != bottom);
     }
+
+    CharSequence getTextToDraw() {
+        return mTextToDraw;
+    }
 }

multiline-collapsingtoolbar/src/main/java/net/opacapp/multilinecollapsingtoolbar/CollapsingToolbarLayout.java

@@ -1321,4 +1321,26 @@ public void onOffsetChanged(AppBarLayout layout, int verticalOffset) {
                     Math.abs(verticalOffset) / (float) expandRange);
         }
     }
+
+    private CharSequence getTextToDraw() {
+        return mCollapsingTextHelper.getTextToDraw();
+    }
+
+    private CharSequence getText() {
+        return mCollapsingTextHelper.getText();
+    }
+
+    private void setExpandedTextSize(float size) {
+        mCollapsingTextHelper.setExpandedTextSize(size);
+    }
+
+    private float getExpandedTextSize() {
+        return mCollapsingTextHelper.getExpandedTextSize();
+    }
+
+    public void checkTextEllipsize(int decreaseRatio) {
+        while (!TextUtils.equals(getTextToDraw(), getText())) {
+            setExpandedTextSize(getExpandedTextSize() - decreaseRatio);
+        }
+    }
 }