From aa3a4681b7f9133776f2d0cceae075f92a1fdbcb Mon Sep 17 00:00:00 2001
From: "pengjian@szy.cn" <pengjian@szy.cn>
Date: Tue, 28 Mar 2017 10:48:39 +0800
Subject: [PATCH 1/3] Fix root background not apply

---
 .../swipebacklayout/lib/SwipeBackLayout.java  | 38 ++++++++++++++++++-
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
index 2f56936..9a03cf7 100644
--- a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
+++ b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
@@ -4,15 +4,20 @@
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
+import android.graphics.Color;
 import android.graphics.Rect;
+import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.support.v4.view.ViewCompat;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -460,13 +465,42 @@ public void attachToActivity(Activity activity) {
 
         ViewGroup decor = (ViewGroup) activity.getWindow().getDecorView();
         ViewGroup decorChild = (ViewGroup) decor.getChildAt(0);
-        decorChild.setBackgroundResource(background);
+        Drawable d = decorChild.getBackground();
+        // no background or background is TRANSPARENT,use 'windowBackground' to background
+        if (d == null || (d instanceof ColorDrawable && isTransparent((ColorDrawable) d))) {
+            decorChild.setBackgroundResource(background);
+        }
         decor.removeView(decorChild);
         addView(decorChild);
         setContentView(decorChild);
         decor.addView(this);
     }
 
+    private boolean isTransparent(ColorDrawable drawable) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            return drawable.getColor() == Color.TRANSPARENT;
+        } else {
+            try {
+                int color = 0;
+                final Field stateField = drawable.getClass().getDeclaredField("mState");
+                stateField.setAccessible(true);
+                final Object state = stateField.get(drawable);
+
+                final Field useColorField = state.getClass().getDeclaredField("mUseColor");
+                useColorField.setAccessible(true);
+                useColorField.setInt(state, color);
+
+                final Field baseColorField = state.getClass().getDeclaredField(
+                        "mBaseColor");
+                baseColorField.setAccessible(true);
+                baseColorField.setInt(state, color);
+                return color == Color.TRANSPARENT;
+            } catch (Exception e) {
+                return false;
+            }
+        }
+    }
+
     @Override
     public void computeScroll() {
         mScrimOpacity = 1 - mScrollPercent;
@@ -549,7 +583,7 @@ public void onViewPositionChanged(View changedView, int left, int top, int dx, i
             if (mScrollPercent >= 1) {
                 if (!mActivity.isFinishing()) {
                     mActivity.finish();
-                    mActivity.overridePendingTransition(0, 0);        
+                    mActivity.overridePendingTransition(0, 0);
                 }
             }
         }

From 282bded12479d3ae31c15908c958e4d3f1793653 Mon Sep 17 00:00:00 2001
From: "pengjian@szy.cn" <pengjian@szy.cn>
Date: Fri, 7 Apr 2017 15:50:24 +0800
Subject: [PATCH 2/3] Fix attachToActivity bug

---
 .../main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
index 9a03cf7..f7a3f0d 100644
--- a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
+++ b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
@@ -473,7 +473,7 @@ public void attachToActivity(Activity activity) {
         decor.removeView(decorChild);
         addView(decorChild);
         setContentView(decorChild);
-        decor.addView(this);
+        decor.addView(this,0);
     }
 
     private boolean isTransparent(ColorDrawable drawable) {

From d4a7c5b80b4c5dc08932e1a9108d7563b96af5eb Mon Sep 17 00:00:00 2001
From: "pengjian@szy.cn" <pengjian@szy.cn>
Date: Fri, 7 Apr 2017 16:05:02 +0800
Subject: [PATCH 3/3] Fix attachToActivity bug

---
 .../java/me/imid/swipebacklayout/lib/SwipeBackLayout.java    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
index f7a3f0d..3a25f83 100644
--- a/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
+++ b/library/src/main/java/me/imid/swipebacklayout/lib/SwipeBackLayout.java
@@ -473,6 +473,11 @@ public void attachToActivity(Activity activity) {
         decor.removeView(decorChild);
         addView(decorChild);
         setContentView(decorChild);
+
+        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) decorChild.getLayoutParams();
+        decorChild.setLayoutParams(new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
+        setLayoutParams(lp);
+
         decor.addView(this,0);
     }