优化

app/src/main/java/io/legado/app/ui/widget/text/MultilineTextView.kt

@@ -1,22 +1,21 @@
 package io.legado.app.ui.widget.text
 
 import android.content.Context
-import android.graphics.Canvas
 import android.util.AttributeSet
 import androidx.appcompat.widget.AppCompatTextView
 
 class MultilineTextView(context: Context, attrs: AttributeSet?) :
     AppCompatTextView(context, attrs) {
 
-    override fun onDraw(canvas: Canvas) {
-        calculateLines()
-        super.onDraw(canvas)
+    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val heightSize = MeasureSpec.getSize(heightMeasureSpec)
+        calculateLines(heightSize)
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec)
     }
 
-    private fun calculateLines() {
-        val mHeight = measuredHeight
+    private fun calculateLines(measuredHeight: Int) {
         val lHeight = lineHeight
-        val lines = mHeight / lHeight
+        val lines = measuredHeight / lHeight
         setLines(lines)
     }
 }