Revert "Remove reflection to get TextView color field (closes #2469)"

This reverts commit 5f2aaeac575548a1984bb256c0150b7fcb0e2f2d.

app/src/main/java/eu/kanade/tachiyomi/ui/reader/PageIndicatorTextView.kt

@@ -24,12 +24,12 @@ class PageIndicatorTextView(
     private val strokeColor = Color.rgb(45, 45, 45)
 
     override fun onDraw(canvas: Canvas) {
-        setTextColor(strokeColor)
+        textColorField.set(this, strokeColor)
         paint.strokeWidth = 4f
         paint.style = Paint.Style.STROKE
         super.onDraw(canvas)
 
-        setTextColor(fillColor)
+        textColorField.set(this, fillColor)
         paint.strokeWidth = 0f
         paint.style = Paint.Style.FILL
         super.onDraw(canvas)
@@ -50,4 +50,12 @@ class PageIndicatorTextView(
 
         super.setText(finalText, TextView.BufferType.SPANNABLE)
     }
+
+    private companion object {
+        // We need to use reflection to set the text color instead of using [setTextColor],
+        // otherwise the view is invalidated inside [onDraw] and there's an infinite loop
+        val textColorField = TextView::class.java.getDeclaredField("mCurTextColor").apply {
+            isAccessible = true
+        }!!
+    }
 }