diff --git a/.classpath b/.classpath
index a4f1e40..0ec76c3 100755
--- a/.classpath
+++ b/.classpath
@@ -1,8 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="src" path="gen"/>
-	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
-	<classpathentry kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/>
-	<classpathentry kind="output" path="bin/classes"/>
-</classpath>
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
+	<classpathentry kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="gen"/>
+	<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.DEPENDENCIES"/>
+	<classpathentry kind="lib" path="/XposedLibrary/XposedBridgeApi-42.jar"/>
+	<classpathentry kind="output" path="bin/classes"/>
+</classpath>
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index fc2d112..3584f14 100755
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -5,7 +5,7 @@
     android:versionName="2.0.0" >
 	
     <uses-sdk 
-        android:minSdkVersion="16" 
+        android:minSdkVersion="14" 
         android:targetSdkVersion="19" />
 
     <application
diff --git a/project.properties b/project.properties
index 183f993..a5578ba 100755
--- a/project.properties
+++ b/project.properties
@@ -9,4 +9,3 @@
 
 # Project target.
 target=android-19
-android.library.reference.1=libs/ShowcaseView
diff --git a/res/layout/slider_preference.xml b/res/layout/slider_preference.xml
index a1829e9..f2f5bac 100755
--- a/res/layout/slider_preference.xml
+++ b/res/layout/slider_preference.xml
@@ -58,7 +58,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_below="@android:id/title"
-            android:layout_alignStart="@android:id/title"
+            android:layout_alignLeft="@android:id/title"
             android:textAppearance="?android:attr/textAppearanceSmall"
             android:textColor="?android:attr/textColorSecondary"
             android:maxLines="4" />
diff --git a/src/us/shandian/mod/swipeback/hook/ModSwipeBack.java b/src/us/shandian/mod/swipeback/hook/ModSwipeBack.java
index 8ba55cd..90e5c57 100755
--- a/src/us/shandian/mod/swipeback/hook/ModSwipeBack.java
+++ b/src/us/shandian/mod/swipeback/hook/ModSwipeBack.java
@@ -294,7 +294,8 @@ public void handleMessage(Message msg)
 				if (!(Boolean) msg.obj) {
 					mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
 				} else {
-					mActivity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);
+					mActivity.setRequestedOrientation(Build.VERSION.SDK_INT <= 15 ? 
+							ActivityInfo.SCREEN_ORIENTATION_NOSENSOR : ActivityInfo.SCREEN_ORIENTATION_LOCKED);
 				}
 			}
 		}
diff --git a/src/us/shandian/mod/swipeback/widget/SwipeBackLayout.java b/src/us/shandian/mod/swipeback/widget/SwipeBackLayout.java
index bd03072..e8c2cd5 100755
--- a/src/us/shandian/mod/swipeback/widget/SwipeBackLayout.java
+++ b/src/us/shandian/mod/swipeback/widget/SwipeBackLayout.java
@@ -7,6 +7,7 @@
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
@@ -453,7 +454,12 @@ public void attachToActivity(Activity activity) {
     public void computeScroll() {
         mScrimOpacity = 1 - mScrollPercent;
         if (mDragHelper.continueSettling(true)) {
-			this.postInvalidateOnAnimation();
+        	if (Build.VERSION.SDK_INT <= 15) {
+        		this.postInvalidateDelayed(10);
+        		// Workaround from Support Library v4 in ViewCompatImpl
+        	} else {
+        		this.postInvalidateOnAnimation();
+        	}
         }
     }