minSdkVersion is now 15 + revised README

Author: alxgrk

README.md

@@ -27,23 +27,27 @@ Demo:
 ## How to use
 
 ### Gradle
-// TODO gradle integration
+To use this library in your own project, simply add the following line to your module `build.gradle`:
+
+```
+compile 'com.github.alxgrk.blendedbackground:blendedbackground:1.0.1'
+```
 
 ### Referencing a View
-To reference a View, simply add `android:tag="@string/ref_tag"` to your View. // TODO replace with custom attribute
+To reference a View, simply add `android:tag="@string/ref_tag"` to your View.
 
 ### Defining Attributes
 You can use the following attributes to define behaviour:
 
-`android:upper_color="\<color\>"` - sets the upper color to a fixed value
+`android:upper_color="<color>"` - sets the upper color to a fixed value
 
-`android:lower_color="\<color\>"` - sets the lower color to a fixed value
+`android:lower_color="<color>"` - sets the lower color to a fixed value
 
-`android:upper_blend_in="\<boolean\>"` - set to true, if fixed upper color and dominating color should be blended together; default is false
+`android:upper_blend_in="<boolean>"` - set to true, if fixed upper color and dominating color should be blended together; default is false
 
-`android:lower_blend_in="\<boolean\>"` - set to true, if fixed lower color and dominating color should be blended together; default is false
+`android:lower_blend_in="<boolean>"` - set to true, if fixed lower color and dominating color should be blended together; default is false
 
-`android:invert="\<boolean\>"` - set to true, if upper and lower color should change position; default is false
+`android:invert="<boolean>"` - set to true, if upper and lower color should change position; default is false
 
 ## Support
 

blendedbackground/src/main/java/com/alxgrk/blendedbackground/BlendedBackgroundLayout.java

@@ -7,6 +7,7 @@
 import android.graphics.Color;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.support.annotation.NonNull;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -133,7 +134,13 @@ private void update() {
         applyUserDefinitions(colors);
 
         Gradient gradient = new Gradient(this, colors.getUpper(), colors.getLower());
-        this.setBackground(gradient.get());
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+            this.setBackground(gradient.get());
+        } else {
+            this.setBackgroundDrawable(gradient.get());
+        }
+
         this.invalidate();
     }