Use SCREEN Xfermode for keyguard badges; update SeekBar

Plumb through the necessary API features through Drawables and
ImageView but leave it hidden for now pending future API review and
plumbing through the rest of the framework Drawable implementations.

Update SeekBar assets used for keyguard transport control.

Set selected status directly instead of finding views by id.

Bug 10531608
Bug 10784913

Change-Id: Ia38bd04ad1bc26e9e6da1dda8a374c9ba3ceccb3

2 files changed, 19 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/drawable/BitmapDrawable.java b/graphics/java/android/graphics/drawable/BitmapDrawable.java
index 5ceab36..98e3386 100644
--- a/graphics/java/android/graphics/drawable/BitmapDrawable.java
+++ b/graphics/java/android/graphics/drawable/BitmapDrawable.java
@@ -28,6 +28,7 @@ import android.graphics.Paint;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.graphics.Shader;
+import android.graphics.Xfermode;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
 import android.util.LayoutDirection;
@@ -531,6 +532,14 @@ public class BitmapDrawable extends Drawable {
     }
 
     /**
+     * @hide Candidate for future API inclusion
+     */
+    public void setXfermode(Xfermode xfermode) {
+        mBitmapState.mPaint.setXfermode(xfermode);
+        invalidateSelf();
+    }
+
+    /**
      * A mutable BitmapDrawable still shares its Bitmap with any other Drawable
      * that comes from the same resource.
      *
diff --git a/graphics/java/android/graphics/drawable/Drawable.java b/graphics/java/android/graphics/drawable/Drawable.java
index 8135716..8a3d940 100644
--- a/graphics/java/android/graphics/drawable/Drawable.java
+++ b/graphics/java/android/graphics/drawable/Drawable.java
@@ -17,6 +17,7 @@
 package android.graphics.drawable;
 
 import android.graphics.Insets;
+import android.graphics.Xfermode;
 import android.os.Trace;
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
@@ -428,6 +429,15 @@ public abstract class Drawable {
     public abstract void setColorFilter(ColorFilter cf);
 
     /**
+     * @hide Consider for future API inclusion
+     */
+    public void setXfermode(Xfermode mode) {
+        // Base implementation drops it on the floor for compatibility. Whee!
+        // TODO: For this to be included in the API proper, all framework drawables need impls.
+        // For right now only BitmapDrawable has it.
+    }
+
+    /**
      * Specify a color and porterduff mode to be the colorfilter for this
      * drawable.
      */