Support for hollow switch and seek bar thumbs

Also cleans up AbsSeekBar.

Change-Id: I996ea90c732c1da6a801aad3079f6bb3692d5c67

api/current.txt

@@ -1047,6 +1047,7 @@ package android {
     field public static final int spinnerStyle = 16842881; // 0x1010081
     field public static final int spinnersShown = 16843595; // 0x101034b
     field public static final int splitMotionEvents = 16843503; // 0x10102ef
+    field public static final int splitTrack = 16843858; // 0x1010452
     field public static final int src = 16843033; // 0x1010119
     field public static final int ssp = 16843747; // 0x10103e3
     field public static final int sspPattern = 16843749; // 0x10103e5
@@ -34345,9 +34346,11 @@ package android.widget {
     ctor public AbsSeekBar(android.content.Context, android.util.AttributeSet, int);
     ctor public AbsSeekBar(android.content.Context, android.util.AttributeSet, int, int);
     method public int getKeyProgressIncrement();
+    method public boolean getSplitTrack();
     method public android.graphics.drawable.Drawable getThumb();
     method public int getThumbOffset();
     method public void setKeyProgressIncrement(int);
+    method public void setSplitTrack(boolean);
     method public void setThumb(android.graphics.drawable.Drawable);
     method public void setThumbOffset(int);
   }
@@ -36150,6 +36153,7 @@ package android.widget {
     ctor public Switch(android.content.Context, android.util.AttributeSet);
     ctor public Switch(android.content.Context, android.util.AttributeSet, int);
     ctor public Switch(android.content.Context, android.util.AttributeSet, int, int);
+    method public boolean getSplitTrack();
     method public int getSwitchMinWidth();
     method public int getSwitchPadding();
     method public java.lang.CharSequence getTextOff();
@@ -36158,6 +36162,7 @@ package android.widget {
     method public int getThumbTextPadding();
     method public android.graphics.drawable.Drawable getTrackDrawable();
     method public void onMeasure(int, int);
+    method public void setSplitTrack(boolean);
     method public void setSwitchMinWidth(int);
     method public void setSwitchPadding(int);
     method public void setSwitchTextAppearance(android.content.Context, int);

core/java/android/widget/AbsSeekBar.java

@@ -19,7 +19,9 @@ package android.widget;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
+import android.graphics.Insets;
 import android.graphics.Rect;
+import android.graphics.Region.Op;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.util.AttributeSet;
@@ -32,9 +34,12 @@ import android.view.accessibility.AccessibilityNodeInfo;
 import com.android.internal.R;
 
 public abstract class AbsSeekBar extends ProgressBar {
+    private final Rect mTempRect = new Rect();
+
     private Drawable mThumb;
     private int mThumbOffset;
-    
+    private boolean mSplitTrack;
+
     /**
      * On touch, this offset plus the scaled value from the position of the
      * touch will form the progress value. Usually 0.
@@ -51,10 +56,10 @@ public abstract class AbsSeekBar extends ProgressBar {
      * progress.
      */
     private int mKeyProgressIncrement = 1;
-    
+
     private static final int NO_ALPHA = 0xFF;
     private float mDisabledAlpha;
-    
+
     private int mScaledTouchSlop;
     private float mTouchDownX;
     private boolean mIsDragging;
@@ -76,12 +81,16 @@ public abstract class AbsSeekBar extends ProgressBar {
 
         TypedArray a = context.obtainStyledAttributes(
                 attrs, com.android.internal.R.styleable.SeekBar, defStyleAttr, defStyleRes);
-        Drawable thumb = a.getDrawable(com.android.internal.R.styleable.SeekBar_thumb);
-        setThumb(thumb); // will guess mThumbOffset if thumb != null...
-        // ...but allow layout to override this
-        int thumbOffset = a.getDimensionPixelOffset(
+
+        final Drawable thumb = a.getDrawable(com.android.internal.R.styleable.SeekBar_thumb);
+        setThumb(thumb);
+
+        // Guess thumb offset if thumb != null, but allow layout to override.
+        final int thumbOffset = a.getDimensionPixelOffset(
                 com.android.internal.R.styleable.SeekBar_thumbOffset, getThumbOffset());
         setThumbOffset(thumbOffset);
+
+        mSplitTrack = a.getBoolean(com.android.internal.R.styleable.SeekBar_splitTrack, false);
         a.recycle();
 
         a = context.obtainStyledAttributes(attrs,
@@ -97,7 +106,7 @@ public abstract class AbsSeekBar extends ProgressBar {
      * <p>
      * If the thumb is a valid drawable (i.e. not null), half its width will be
      * used as the new thumb offset (@see #setThumbOffset(int)).
-     * 
+     *
      * @param thumb Drawable representing the thumb
      */
     public void setThumb(Drawable thumb) {
@@ -132,7 +141,7 @@ public abstract class AbsSeekBar extends ProgressBar {
         mThumb = thumb;
         invalidate();
         if (needUpdate) {
-            updateThumbPos(getWidth(), getHeight());
+            updateThumbAndTrackPos(getWidth(), getHeight());
             if (thumb != null && thumb.isStateful()) {
                 // Note that if the states are different this won't work.
                 // For now, let's consider that an app bug.
@@ -162,7 +171,7 @@ public abstract class AbsSeekBar extends ProgressBar {
     /**
      * Sets the thumb offset that allows the thumb to extend out of the range of
      * the track.
-     * 
+     *
      * @param thumbOffset The offset amount in pixels.
      */
     public void setThumbOffset(int thumbOffset) {
@@ -170,9 +179,28 @@ public abstract class AbsSeekBar extends ProgressBar {
         invalidate();
     }
 
+    /**
+     * Specifies whether the track should be split by the thumb. When true,
+     * the thumb's optical bounds will be clipped out of the track drawable,
+     * then the thumb will be drawn into the resulting gap.
+     *
+     * @param splitTrack Whether the track should be split by the thumb
+     */
+    public void setSplitTrack(boolean splitTrack) {
+        mSplitTrack = splitTrack;
+        invalidate();
+    }
+
+    /**
+     * Returns whether the track should be split by the thumb.
+     */
+    public boolean getSplitTrack() {
+        return mSplitTrack;
+    }
+
     /**
      * Sets the amount of progress changed via the arrow keys.
-     * 
+     *
      * @param increment The amount to increment or decrement when the user
      *            presses the arrow keys.
      */
@@ -184,14 +212,14 @@ public abstract class AbsSeekBar extends ProgressBar {
      * Returns the amount of progress changed via the arrow keys.
      * <p>
      * By default, this will be a value that is derived from the max progress.
-     * 
+     *
      * @return The amount to increment or decrement when the user presses the
      *         arrow keys. This will be positive.
      */
     public int getKeyProgressIncrement() {
         return mKeyProgressIncrement;
     }
-    
+
     @Override
     public synchronized void setMax(int max) {
         super.setMax(max);
@@ -217,79 +245,85 @@ public abstract class AbsSeekBar extends ProgressBar {
     @Override
     protected void drawableStateChanged() {
         super.drawableStateChanged();
-        
-        Drawable progressDrawable = getProgressDrawable();
+
+        final Drawable progressDrawable = getProgressDrawable();
         if (progressDrawable != null) {
             progressDrawable.setAlpha(isEnabled() ? NO_ALPHA : (int) (NO_ALPHA * mDisabledAlpha));
         }
-        
-        if (mThumb != null && mThumb.isStateful()) {
-            int[] state = getDrawableState();
-            mThumb.setState(state);
+
+        final Drawable thumb = mThumb;
+        if (thumb != null && thumb.isStateful()) {
+            thumb.setState(getDrawableState());
         }
     }
-    
+
     @Override
     void onProgressRefresh(float scale, boolean fromUser) {
         super.onProgressRefresh(scale, fromUser);
-        Drawable thumb = mThumb;
+
+        final Drawable thumb = mThumb;
         if (thumb != null) {
             setThumbPos(getWidth(), thumb, scale, Integer.MIN_VALUE);
-            /*
-             * Since we draw translated, the drawable's bounds that it signals
-             * for invalidation won't be the actual bounds we want invalidated,
-             * so just invalidate this whole view.
-             */
+
+            // Since we draw translated, the drawable's bounds that it signals
+            // for invalidation won't be the actual bounds we want invalidated,
+            // so just invalidate this whole view.
             invalidate();
         }
     }
-    
-    
+
     @Override
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
-        updateThumbPos(w, h);
+
+        updateThumbAndTrackPos(w, h);
     }
 
-    private void updateThumbPos(int w, int h) {
-        Drawable d = getCurrentDrawable();
-        Drawable thumb = mThumb;
-        int thumbHeight = thumb == null ? 0 : thumb.getIntrinsicHeight();
+    private void updateThumbAndTrackPos(int w, int h) {
+        final Drawable track = getCurrentDrawable();
+        final Drawable thumb = mThumb;
+
         // The max height does not incorporate padding, whereas the height
-        // parameter does
-        int trackHeight = Math.min(mMaxHeight, h - mPaddingTop - mPaddingBottom);
-        
-        int max = getMax();
-        float scale = max > 0 ? (float) getProgress() / (float) max : 0;
-        
+        // parameter does.
+        final int trackHeight = Math.min(mMaxHeight, h - mPaddingTop - mPaddingBottom);
+        final int thumbHeight = thumb == null ? 0 : thumb.getIntrinsicHeight();
+
+        // Apply offset to whichever item is taller.
+        final int trackOffset;
+        final int thumbOffset;
         if (thumbHeight > trackHeight) {
-            if (thumb != null) {
-                setThumbPos(w, thumb, scale, 0);
-            }
-            int gapForCenteringTrack = (thumbHeight - trackHeight) / 2;
-            if (d != null) {
-                // Canvas will be translated by the padding, so 0,0 is where we start drawing
-                d.setBounds(0, gapForCenteringTrack, 
-                        w - mPaddingRight - mPaddingLeft, h - mPaddingBottom - gapForCenteringTrack
-                        - mPaddingTop);
-            }
+            trackOffset = (thumbHeight - trackHeight) / 2;
+            thumbOffset = 0;
         } else {
-            if (d != null) {
-                // Canvas will be translated by the padding, so 0,0 is where we start drawing
-                d.setBounds(0, 0, w - mPaddingRight - mPaddingLeft, h - mPaddingBottom
-                        - mPaddingTop);
-            }
-            int gap = (trackHeight - thumbHeight) / 2;
-            if (thumb != null) {
-                setThumbPos(w, thumb, scale, gap);
-            }
+            trackOffset = 0;
+            thumbOffset = (trackHeight - thumbHeight) / 2;
+        }
+
+        if (track != null) {
+            track.setBounds(0, trackOffset, w - mPaddingRight - mPaddingLeft,
+                    h - mPaddingBottom - trackOffset - mPaddingTop);
+        }
+
+        if (thumb != null) {
+            setThumbPos(w, thumb, getScale(), thumbOffset);
         }
     }
 
+    private float getScale() {
+        final int max = getMax();
+        return max > 0 ? getProgress() / (float) max : 0;
+    }
+
     /**
-     * @param gap If set to {@link Integer#MIN_VALUE}, this will be ignored and
+     * Updates the thumb drawable bounds.
+     *
+     * @param w Width of the view, including padding
+     * @param thumb Drawable used for the thumb
+     * @param scale Current progress between 0 and 1
+     * @param offset Vertical offset for centering. If set to
+     *            {@link Integer#MIN_VALUE}, the current offset will be used.
      */
-    private void setThumbPos(int w, Drawable thumb, float scale, int gap) {
+    private void setThumbPos(int w, Drawable thumb, float scale, int offset) {
         int available = w - mPaddingLeft - mPaddingRight;
         final int thumbWidth = thumb.getIntrinsicWidth();
         final int thumbHeight = thumb.getIntrinsicHeight();
@@ -301,13 +335,13 @@ public abstract class AbsSeekBar extends ProgressBar {
         final int thumbPos = (int) (scale * available + 0.5f);
 
         final int top, bottom;
-        if (gap == Integer.MIN_VALUE) {
+        if (offset == Integer.MIN_VALUE) {
             final Rect oldBounds = thumb.getBounds();
             top = oldBounds.top;
             bottom = oldBounds.bottom;
         } else {
-            top = gap;
-            bottom = gap + thumbHeight;
+            top = offset;
+            bottom = offset + thumbHeight;
         }
 
         final int left = (isLayoutRtl() && mMirrorForRtl) ? available - thumbPos : thumbPos;
@@ -342,6 +376,33 @@ public abstract class AbsSeekBar extends ProgressBar {
     protected synchronized void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
+        drawThumb(canvas);
+    }
+
+    @Override
+    void drawTrack(Canvas canvas) {
+        final Drawable thumbDrawable = mThumb;
+        if (thumbDrawable != null && mSplitTrack) {
+            final Insets insets = thumbDrawable.getOpticalInsets();
+            final Rect tempRect = mTempRect;
+            thumbDrawable.copyBounds(tempRect);
+            tempRect.offset(mPaddingLeft - mThumbOffset, mPaddingTop);
+            tempRect.left += insets.left;
+            tempRect.right -= insets.right;
+
+            final int saveCount = canvas.save();
+            canvas.clipRect(tempRect, Op.DIFFERENCE);
+            super.drawTrack(canvas);
+            canvas.restoreToCount(saveCount);
+        } else {
+            super.drawTrack(canvas);
+        }
+    }
+
+    /**
+     * Draw the thumb.
+     */
+    void drawThumb(Canvas canvas) {
         if (mThumb != null) {
             canvas.save();
             // Translate the padding. For the x, we need to allow the thumb to
@@ -366,17 +427,17 @@ public abstract class AbsSeekBar extends ProgressBar {
         }
         dw += mPaddingLeft + mPaddingRight;
         dh += mPaddingTop + mPaddingBottom;
-        
+
         setMeasuredDimension(resolveSizeAndState(dw, widthMeasureSpec, 0),
                 resolveSizeAndState(dh, heightMeasureSpec, 0));
     }
-    
+
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         if (!mIsUserSeekable || !isEnabled()) {
             return false;
         }
-        
+
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
                 if (isInScrollingContainer()) {
@@ -391,7 +452,7 @@ public abstract class AbsSeekBar extends ProgressBar {
                     attemptClaimDrag();
                 }
                 break;
-                
+
             case MotionEvent.ACTION_MOVE:
                 if (mIsDragging) {
                     trackTouchEvent(event);
@@ -408,7 +469,7 @@ public abstract class AbsSeekBar extends ProgressBar {
                     }
                 }
                 break;
-                
+
             case MotionEvent.ACTION_UP:
                 if (mIsDragging) {
                     trackTouchEvent(event);
@@ -426,7 +487,7 @@ public abstract class AbsSeekBar extends ProgressBar {
                 // value has not apparently changed)
                 invalidate();
                 break;
-                
+
             case MotionEvent.ACTION_CANCEL:
                 if (mIsDragging) {
                     onStopTrackingTouch();
@@ -493,7 +554,7 @@ public abstract class AbsSeekBar extends ProgressBar {
             mParent.requestDisallowInterceptTouchEvent(true);
         }
     }
-    
+
     /**
      * This is called when the user has started touching this widget.
      */
@@ -526,7 +587,7 @@ public abstract class AbsSeekBar extends ProgressBar {
                     setProgress(progress - mKeyProgressIncrement, true);
                     onKeyChange();
                     return true;
-            
+
                 case KeyEvent.KEYCODE_DPAD_RIGHT:
                     if (progress >= getMax()) break;
                     setProgress(progress + mKeyProgressIncrement, true);
@@ -595,17 +656,13 @@ public abstract class AbsSeekBar extends ProgressBar {
     public void onRtlPropertiesChanged(int layoutDirection) {
         super.onRtlPropertiesChanged(layoutDirection);
 
-        int max = getMax();
-        float scale = max > 0 ? (float) getProgress() / (float) max : 0;
-
-        Drawable thumb = mThumb;
+        final Drawable thumb = mThumb;
         if (thumb != null) {
-            setThumbPos(getWidth(), thumb, scale, Integer.MIN_VALUE);
-            /*
-             * Since we draw translated, the drawable's bounds that it signals
-             * for invalidation won't be the actual bounds we want invalidated,
-             * so just invalidate this whole view.
-             */
+            setThumbPos(getWidth(), thumb, getScale(), Integer.MIN_VALUE);
+
+            // Since we draw translated, the drawable's bounds that it signals
+            // for invalidation won't be the actual bounds we want invalidated,
+            // so just invalidate this whole view.
             invalidate();
         }
     }

core/java/android/widget/ProgressBar.java

@@ -1066,21 +1066,30 @@ public class ProgressBar extends View {
     protected synchronized void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
-        Drawable d = mCurrentDrawable;
+        drawTrack(canvas);
+    }
+
+    /**
+     * Draws the progress bar track.
+     */
+    void drawTrack(Canvas canvas) {
+        final Drawable d = mCurrentDrawable;
         if (d != null) {
             // Translate canvas so a indeterminate circular progress bar with padding
             // rotates properly in its animation
-            canvas.save();
+            final int saveCount = canvas.save();
+
             if(isLayoutRtl() && mMirrorForRtl) {
                 canvas.translate(getWidth() - mPaddingRight, mPaddingTop);
                 canvas.scale(-1.0f, 1.0f);
             } else {
                 canvas.translate(mPaddingLeft, mPaddingTop);
             }
-            long time = getDrawingTime();
+
+            final long time = getDrawingTime();
             if (mHasAnimation) {
                 mAnimation.getTransformation(time, mTransformation);
-                float scale = mTransformation.getAlpha();
+                final float scale = mTransformation.getAlpha();
                 try {
                     mInDrawing = true;
                     d.setLevel((int) (scale * MAX_LEVEL));
@@ -1089,8 +1098,10 @@ public class ProgressBar extends View {
                 }
                 postInvalidateOnAnimation();
             }
+
             d.draw(canvas);
-            canvas.restore();
+            canvas.restoreToCount(saveCount);
+
             if (mShouldStartAnimationDrawable && d instanceof Animatable) {
                 ((Animatable) d).start();
                 mShouldStartAnimationDrawable = false;

core/java/android/widget/Switch.java

@@ -22,9 +22,11 @@ import android.content.res.ColorStateList;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
+import android.graphics.Insets;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.graphics.Typeface;
+import android.graphics.Region.Op;
 import android.graphics.drawable.Drawable;
 import android.text.Layout;
 import android.text.StaticLayout;
@@ -85,6 +87,7 @@ public class Switch extends CompoundButton {
     private int mThumbTextPadding;
     private int mSwitchMinWidth;
     private int mSwitchPadding;
+    private boolean mSplitTrack;
     private CharSequence mTextOn;
     private CharSequence mTextOff;
 
@@ -174,13 +177,13 @@ public class Switch extends CompoundButton {
         super(context, attrs, defStyleAttr, defStyleRes);
 
         mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
-        Resources res = getResources();
+
+        final Resources res = getResources();
         mTextPaint.density = res.getDisplayMetrics().density;
         mTextPaint.setCompatibilityScaling(res.getCompatibilityInfo().applicationScale);
 
         final TypedArray a = context.obtainStyledAttributes(
                 attrs, com.android.internal.R.styleable.Switch, defStyleAttr, defStyleRes);
-
         mThumbDrawable = a.getDrawable(com.android.internal.R.styleable.Switch_thumb);
         mTrackDrawable = a.getDrawable(com.android.internal.R.styleable.Switch_track);
         mTextOn = a.getText(com.android.internal.R.styleable.Switch_textOn);
@@ -191,15 +194,16 @@ public class Switch extends CompoundButton {
                 com.android.internal.R.styleable.Switch_switchMinWidth, 0);
         mSwitchPadding = a.getDimensionPixelSize(
                 com.android.internal.R.styleable.Switch_switchPadding, 0);
+        mSplitTrack = a.getBoolean(com.android.internal.R.styleable.Switch_splitTrack, false);
 
-        int appearance = a.getResourceId(
+        final int appearance = a.getResourceId(
                 com.android.internal.R.styleable.Switch_switchTextAppearance, 0);
         if (appearance != 0) {
             setSwitchTextAppearance(context, appearance);
         }
         a.recycle();
 
-        ViewConfiguration config = ViewConfiguration.get(context);
+        final ViewConfiguration config = ViewConfiguration.get(context);
         mTouchSlop = config.getScaledTouchSlop();
         mMinFlingVelocity = config.getScaledMinimumFlingVelocity();
 
@@ -468,6 +472,29 @@ public class Switch extends CompoundButton {
         return mThumbDrawable;
     }
 
+    /**
+     * Specifies whether the track should be split by the thumb. When true,
+     * the thumb's optical bounds will be clipped out of the track drawable,
+     * then the thumb will be drawn into the resulting gap.
+     *
+     * @param splitTrack Whether the track should be split by the thumb
+     *
+     * @attr ref android.R.styleable#Switch_splitTrack
+     */
+    public void setSplitTrack(boolean splitTrack) {
+        mSplitTrack = splitTrack;
+        invalidate();
+    }
+
+    /**
+     * Returns whether the track should be split by the thumb.
+     *
+     * @attr ref android.R.styleable#Switch_splitTrack
+     */
+    public boolean getSplitTrack() {
+        return mSplitTrack;
+    }
+
     /**
      * Returns the text displayed when the button is in the checked state.
      *
@@ -518,13 +545,15 @@ public class Switch extends CompoundButton {
 
         mTrackDrawable.getPadding(mTempRect);
 
-        final int maxTextWidth = Math.max(mOnLayout.getWidth(), mOffLayout.getWidth());
+        final int maxTextWidth = Math.max(mOnLayout.getWidth(), mOffLayout.getWidth())
+                + mThumbTextPadding * 2;
+        mThumbWidth = Math.max(maxTextWidth, mThumbDrawable.getIntrinsicWidth());
+
         final int switchWidth = Math.max(mSwitchMinWidth,
-                maxTextWidth * 2 + mThumbTextPadding * 4 + mTempRect.left + mTempRect.right);
+                2 * mThumbWidth + mTempRect.left + mTempRect.right);
         final int switchHeight = Math.max(mTrackDrawable.getIntrinsicHeight(),
                 mThumbDrawable.getIntrinsicHeight());
 
-        mThumbWidth = maxTextWidth + mThumbTextPadding * 2;
 
         mSwitchWidth = switchWidth;
         mSwitchHeight = switchHeight;
@@ -777,7 +806,7 @@ public class Switch extends CompoundButton {
         final Drawable trackDrawable = mTrackDrawable;
         final Drawable thumbDrawable = mThumbDrawable;
 
-        // Draw the switch
+        // Layout the track.
         final int switchLeft = mSwitchLeft;
         final int switchTop = mSwitchTop;
         final int switchRight = mSwitchRight;
@@ -793,9 +822,10 @@ public class Switch extends CompoundButton {
         // Relies on mTempRect, MUST be called first!
         final int thumbPos = getThumbOffset();
 
+        // Layout the thumb.
         thumbDrawable.getPadding(tempRect);
-        int thumbLeft = switchInnerLeft - tempRect.left + thumbPos;
-        int thumbRight = switchInnerLeft + thumbPos + mThumbWidth + tempRect.right;
+        final int thumbLeft = switchInnerLeft - tempRect.left + thumbPos;
+        final int thumbRight = switchInnerLeft + thumbPos + mThumbWidth + tempRect.right;
         thumbDrawable.setBounds(thumbLeft, switchTop, thumbRight, switchBottom);
 
         final Drawable background = getBackground();
@@ -805,20 +835,32 @@ public class Switch extends CompoundButton {
 
         super.onDraw(canvas);
 
-        trackDrawable.draw(canvas);
+        if (mSplitTrack) {
+            final Insets insets = thumbDrawable.getOpticalInsets();
+            thumbDrawable.copyBounds(tempRect);
+            tempRect.left += insets.left;
+            tempRect.right -= insets.right;
+
+            final int saveCount = canvas.save();
+            canvas.clipRect(tempRect, Op.DIFFERENCE);
+            trackDrawable.draw(canvas);
+            canvas.restoreToCount(saveCount);
+        } else {
+            trackDrawable.draw(canvas);
+        }
 
         final int saveCount = canvas.save();
         canvas.clipRect(switchInnerLeft, switchTop, switchInnerRight, switchBottom);
         thumbDrawable.draw(canvas);
 
-        final int drawableState[] = getDrawableState();
-        if (mTextColors != null) {
-            mTextPaint.setColor(mTextColors.getColorForState(drawableState, 0));
-        }
-        mTextPaint.drawableState = drawableState;
-
         final Layout switchText = getTargetCheckedState() ? mOnLayout : mOffLayout;
         if (switchText != null) {
+            final int drawableState[] = getDrawableState();
+            if (mTextColors != null) {
+                mTextPaint.setColor(mTextColors.getColorForState(drawableState, 0));
+            }
+            mTextPaint.drawableState = drawableState;
+
             final int left = (thumbLeft + thumbRight) / 2 - switchText.getWidth() / 2;
             final int top = (switchInnerTop + switchInnerBottom) / 2 - switchText.getHeight() / 2;
             canvas.translate(left, top);
@@ -889,12 +931,16 @@ public class Switch extends CompoundButton {
     protected void drawableStateChanged() {
         super.drawableStateChanged();
 
-        int[] myDrawableState = getDrawableState();
+        final int[] myDrawableState = getDrawableState();
 
-        // Set the state of the Drawable
-        // Drawable may be null when checked state is set from XML, from super constructor
-        if (mThumbDrawable != null) mThumbDrawable.setState(myDrawableState);
-        if (mTrackDrawable != null) mTrackDrawable.setState(myDrawableState);
+        if (mThumbDrawable != null && mThumbDrawable.setState(myDrawableState)) {
+            // Handle changes to thumb width and height.
+            requestLayout();
+        }
+
+        if (mTrackDrawable != null) {
+            mTrackDrawable.setState(myDrawableState);
+        }
 
         invalidate();
     }

core/res/res/drawable/scrubber_progress_horizontal_quantum.xml

@@ -16,22 +16,26 @@
 
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_enabled="false">
-        <bitmap android:src="@drawable/scrubber_track_qntm_alpha"
+        <nine-patch android:src="@drawable/scrubber_track_qntm_alpha"
             android:tint="?attr/colorControlNormal" />
     </item>
     <item>
         <layer-list>
             <item android:id="@id/background">
-                <bitmap android:src="@drawable/scrubber_track_qntm_alpha"
+                <nine-patch android:src="@drawable/scrubber_track_qntm_alpha"
                     android:tint="?attr/colorControlNormal" />
             </item>
             <item android:id="@id/secondaryProgress">
-                <bitmap android:src="@drawable/scrubber_primary_qntm_alpha"
-                    android:tint="?attr/colorControlNormal" />
+                <scale android:scaleWidth="100%">
+                    <nine-patch android:src="@drawable/scrubber_primary_qntm_alpha"
+                        android:tint="?attr/colorControlNormal" />
+                </scale>
             </item>
             <item android:id="@id/progress">
-                <bitmap android:src="@drawable/scrubber_primary_qntm_alpha"
-                    android:tint="?attr/colorControlActivated" />
+                <scale android:scaleWidth="100%">
+                    <nine-patch android:src="@drawable/scrubber_primary_qntm_alpha"
+                        android:tint="?attr/colorControlActivated" />
+                </scale>
             </item>
         </layer-list>
     </item>

core/res/res/values/attrs.xml

@@ -3343,6 +3343,8 @@
         <attr name="thumb" format="reference" />
         <!-- An offset for the thumb that allows it to extend out of the range of the track. -->
         <attr name="thumbOffset" format="dimension" />
+        <!-- Whether to split the track and leave a gap for the thumb drawable. -->
+        <attr name="splitTrack" format="boolean" />
     </declare-styleable>
 
     <declare-styleable name="StackView">
@@ -6393,6 +6395,8 @@
         <attr name="switchMinWidth" format="dimension" />
         <!-- Minimum space between the switch and caption text -->
         <attr name="switchPadding" format="dimension" />
+        <!-- Whether to split the track and leave a gap for the thumb drawable. -->
+        <attr name="splitTrack" />
     </declare-styleable>
 
     <declare-styleable name="Pointer">

core/res/res/values/public.xml

@@ -2169,6 +2169,7 @@
   <public type="attr" name="toId" />
   <public type="attr" name="fromId" />
   <public type="attr" name="reversible" />
+  <public type="attr" name="splitTrack" />
 
   <public-padding type="dimen" name="l_resource_pad" end="0x01050010" />
 

core/res/res/values/styles_quantum.xml

@@ -455,10 +455,10 @@ please see styles_device_defaults.xml.
     <style name="Widget.Quantum.CompoundButton.Switch">
         <item name="track">@drawable/switch_track_quantum</item>
         <item name="thumb">@drawable/switch_inner_quantum</item>
+        <item name="splitTrack">true</item>
         <item name="switchTextAppearance">@style/TextAppearance.Quantum.Widget.Switch</item>
         <item name="textOn"></item>
         <item name="textOff"></item>
-        <item name="thumbTextPadding">12dip</item>
         <item name="switchMinWidth">72dip</item>
         <item name="switchPadding">16dip</item>
         <item name="background">?attr/selectableItemBackground</item>
@@ -572,10 +572,8 @@ please see styles_device_defaults.xml.
         <item name="indeterminateOnly">false</item>
         <item name="progressDrawable">@drawable/scrubber_progress_horizontal_quantum</item>
         <item name="indeterminateDrawable">@drawable/scrubber_progress_horizontal_quantum</item>
-        <item name="minHeight">13dip</item>
-        <item name="maxHeight">13dip</item>
         <item name="thumb">@drawable/scrubber_control_selector_quantum</item>
-        <item name="thumbOffset">16dip</item>
+        <item name="splitTrack">true</item>
         <item name="focusable">true</item>
         <item name="paddingStart">16dip</item>
         <item name="paddingEnd">16dip</item>