From 04ca9b7833138f5e5a4da4511297bd181db9cdbe Mon Sep 17 00:00:00 2001
From: cgspine <cgspine@gmail.com>
Date: Tue, 16 Mar 2021 22:45:03 +0800
Subject: [PATCH] use parent size if self size is zero.

---
 .../qmuiteam/qmui/arch/SwipeBackLayout.java   | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/src/main/java/com/qmuiteam/qmui/arch/SwipeBackLayout.java b/arch/src/main/java/com/qmuiteam/qmui/arch/SwipeBackLayout.java
index 26c21129..d06805b3 100644
--- a/arch/src/main/java/com/qmuiteam/qmui/arch/SwipeBackLayout.java
+++ b/arch/src/main/java/com/qmuiteam/qmui/arch/SwipeBackLayout.java
@@ -816,21 +816,45 @@ public class SwipeBackLayout extends FrameLayout {
 
     public float getXFraction() {
         int width = getWidth();
+        if(width == 0){
+            ViewParent parent = getParent();
+            if(parent instanceof ViewGroup){
+                width = ((ViewGroup)parent).getWidth();
+            }
+        }
         return (width == 0) ? 0 : getX() / (float) width;
     }
 
     public void setXFraction(float xFraction) {
         int width = getWidth();
+        if(width == 0){
+            ViewParent parent = getParent();
+            if(parent instanceof ViewGroup){
+                width = ((ViewGroup)parent).getWidth();
+            }
+        }
         setX((width > 0) ? (xFraction * width) : 0);
     }
 
     public float getYFraction() {
         int height = getHeight();
+        if(height == 0){
+            ViewParent parent = getParent();
+            if(parent instanceof ViewGroup){
+                height = ((ViewGroup)parent).getHeight();
+            }
+        }
         return (height == 0) ? 0 : getY() / (float) height;
     }
 
     public void setYFraction(float yFraction) {
         int height = getHeight();
+        if(height == 0){
+            ViewParent parent = getParent();
+            if(parent instanceof ViewGroup){
+                height = ((ViewGroup)parent).getHeight();
+            }
+        }
         setY((height > 0) ? (yFraction * height) : 0);
     }