Fix #441

src/main/scala/com/github/shadowsocks/widget/AutoPaddingBehavior.scala

@@ -0,0 +1,30 @@
+package com.github.shadowsocks.widget
+
+import android.content.Context
+import android.support.design.widget.CoordinatorLayout
+import android.support.design.widget.CoordinatorLayout.Behavior
+import android.support.design.widget.Snackbar.SnackbarLayout
+import android.util.AttributeSet
+import android.view.View
+
+/**
+  * @author Mygod
+  */
+class AutoPaddingBehavior(context: Context, attrs: AttributeSet) extends Behavior[View] {
+  override def layoutDependsOn(parent: CoordinatorLayout, child: View, dependency: View) =
+    dependency.isInstanceOf[SnackbarLayout]
+
+  override def onDependentViewChanged(parent: CoordinatorLayout, child: View, dependency: View) =
+    dependency match {
+      case sl: SnackbarLayout =>
+        child.setPadding(0, 0, 0, dependency.getHeight)
+        true
+      case _ => super.onDependentViewChanged(parent, child, dependency)
+    }
+
+  override def onDependentViewRemoved(parent: CoordinatorLayout, child: View, dependency: View) =
+    dependency match {
+      case sl: SnackbarLayout => child.setPadding(0, 0, 0, 0)
+      case _ => super.onDependentViewRemoved(parent, child, dependency)
+    }
+}