potential solution to rare out of memory problems

Author: Marko Brčić

MPChartLib/src/com/github/mikephil/charting/renderer/LineChartRenderer.java

@@ -727,10 +727,15 @@ public Bitmap.Config getBitmapConfig() {
      * Releases the drawing bitmap. This should be called when {@link LineChart#onDetachedFromWindow()}.
      */
     public void releaseBitmap() {
+        if (mBitmapCanvas != null) {
+            mBitmapCanvas.setBitmap(null);
+            mBitmapCanvas = null;
+        }
         if (mDrawBitmap != null) {
             mDrawBitmap.get().recycle();
             mDrawBitmap.clear();
             mDrawBitmap = null;
         }
+        System.gc();
     }
 }

MPChartLib/src/com/github/mikephil/charting/renderer/PieChartRenderer.java

@@ -919,10 +919,15 @@ protected void drawRoundedSlices(Canvas c) {
      * Releases the drawing bitmap. This should be called when {@link LineChart#onDetachedFromWindow()}.
      */
     public void releaseBitmap() {
+        if (mBitmapCanvas != null) {
+            mBitmapCanvas.setBitmap(null);
+            mBitmapCanvas = null;
+        }
         if (mDrawBitmap != null) {
             mDrawBitmap.get().recycle();
             mDrawBitmap.clear();
             mDrawBitmap = null;
         }
+        System.gc();
     }
 }