Apply density scaling in LayerDrawable and subclasses (0cacad70) · Commits · e / os / android_frameworks_base

graphics/java/android/graphics/drawable/LayerDrawable.java

+249 −105

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@ import android.graphics.PixelFormat;
		import android.graphics.PorterDuff.Mode;
		import android.graphics.Rect;
		import android.util.AttributeSet;
		import android.util.DisplayMetrics;
		import android.util.LayoutDirection;
		import android.view.Gravity;
		import android.view.View;
		@@ -124,7 +125,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		final int length = layers.length;
		final ChildDrawable[] r = new ChildDrawable[length];
		for (int i = 0; i < length; i++) {
		r[i] = new ChildDrawable();
		r[i] = new ChildDrawable(mLayerState.mDensity);
		r[i].mDrawable = layers[i];
		layers[i].setCallback(this);
		mLayerState.mChildrenChangingConfigurations \|= layers[i].getChangingConfigurations();
		@@ -140,6 +141,10 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		this((LayerState) null, null);
		}

		/**
		* The one constructor to rule them all. This is called by all public
		* constructors to set the state and initialize local properties.
		*/
		LayerDrawable(@Nullable LayerState state, @Nullable Resources res) {
		mLayerState = createConstantState(state, res);
		if (mLayerState.mNum > 0) {
		@@ -153,63 +158,78 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		}

		@Override
		public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
		public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
		@NonNull AttributeSet attrs, @Nullable Theme theme)
		throws XmlPullParserException, IOException {
		super.inflate(r, parser, attrs, theme);

		final LayerState state = mLayerState;
		if (state == null) {
		return;
		}

		// The density may have changed since the last update. This will
		// apply scaling to any existing constant state properties.
		final int densityDpi = r.getDisplayMetrics().densityDpi;
		final int density = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi;
		state.setDensity(density);

		final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.LayerDrawable);
		updateStateFromTypedArray(a);
		a.recycle();

		final ChildDrawable[] array = state.mChildren;
		final int N = state.mNum;
		for (int i = 0; i < N; i++) {
		final ChildDrawable layer = array[i];
		layer.setDensity(density);
		}

		inflateLayers(r, parser, attrs, theme);

		ensurePadding();
		refreshPadding();
		}

		/**
		* Initializes the constant state from the values in the typed array.
		*/
		private void updateStateFromTypedArray(TypedArray a) {
		@Override
		public void applyTheme(@NonNull Theme t) {
		super.applyTheme(t);

		final LayerState state = mLayerState;
		if (state == null) {
		return;
		}

		// Account for any configuration changes.
		state.mChangingConfigurations \|= a.getChangingConfigurations();
		final int densityDpi = t.getResources().getDisplayMetrics().densityDpi;
		final int density = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi;
		state.setDensity(density);

		// Extract the theme attributes, if any.
		state.mThemeAttrs = a.extractThemeAttrs();
		if (state.mThemeAttrs != null) {
		final TypedArray a = t.resolveAttributes(
		state.mThemeAttrs, R.styleable.LayerDrawable);
		updateStateFromTypedArray(a);
		a.recycle();
		}

		final int N = a.getIndexCount();
		final ChildDrawable[] array = state.mChildren;
		final int N = state.mNum;
		for (int i = 0; i < N; i++) {
		int attr = a.getIndex(i);
		switch (attr) {
		case R.styleable.LayerDrawable_opacity:
		state.mOpacityOverride = a.getInt(attr, state.mOpacityOverride);
		break;
		case R.styleable.LayerDrawable_paddingTop:
		state.mPaddingTop = a.getDimensionPixelOffset(attr, state.mPaddingTop);
		break;
		case R.styleable.LayerDrawable_paddingBottom:
		state.mPaddingBottom = a.getDimensionPixelOffset(attr, state.mPaddingBottom);
		break;
		case R.styleable.LayerDrawable_paddingLeft:
		state.mPaddingLeft = a.getDimensionPixelOffset(attr, state.mPaddingLeft);
		break;
		case R.styleable.LayerDrawable_paddingRight:
		state.mPaddingRight = a.getDimensionPixelOffset(attr, state.mPaddingRight);
		break;
		case R.styleable.LayerDrawable_paddingStart:
		state.mPaddingStart = a.getDimensionPixelOffset(attr, state.mPaddingStart);
		break;
		case R.styleable.LayerDrawable_paddingEnd:
		state.mPaddingEnd = a.getDimensionPixelOffset(attr, state.mPaddingEnd);
		break;
		case R.styleable.LayerDrawable_autoMirrored:
		state.mAutoMirrored = a.getBoolean(attr, state.mAutoMirrored);
		break;
		case R.styleable.LayerDrawable_paddingMode:
		state.mPaddingMode = a.getInteger(attr, state.mPaddingMode);
		break;
		final ChildDrawable layer = array[i];
		layer.setDensity(density);

		if (layer.mThemeAttrs != null) {
		final TypedArray a = t.resolveAttributes(
		layer.mThemeAttrs, R.styleable.LayerDrawableItem);
		updateLayerFromTypedArray(layer, a);
		a.recycle();
		}

		final Drawable d = layer.mDrawable;
		if (d != null && d.canApplyTheme()) {
		d.applyTheme(t);

		// Update cached mask of child changing configurations.
		state.mChildrenChangingConfigurations \|= d.getChangingConfigurations();
		}
		}
		}
		@@ -217,7 +237,8 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		/**
		* Inflates child layers using the specified parser.
		*/
		private void inflateLayers(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
		private void inflateLayers(@NonNull Resources r, @NonNull XmlPullParser parser,
		@NonNull AttributeSet attrs, @Nullable Theme theme)
		throws XmlPullParserException, IOException {
		final LayerState state = mLayerState;

		@@ -234,7 +255,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		continue;
		}

		final ChildDrawable layer = new ChildDrawable();
		final ChildDrawable layer = new ChildDrawable(state.mDensity);
		final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.LayerDrawableItem);
		updateLayerFromTypedArray(layer, a);
		a.recycle();
		@@ -264,77 +285,103 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		}
		}

		private void updateLayerFromTypedArray(ChildDrawable layer, TypedArray a) {
		/**
		* Initializes the constant state from the values in the typed array.
		*/
		private void updateStateFromTypedArray(@NonNull TypedArray a) {
		final LayerState state = mLayerState;

		// Account for any configuration changes.
		state.mChildrenChangingConfigurations \|= a.getChangingConfigurations();
		state.mChangingConfigurations \|= a.getChangingConfigurations();

		// Extract the theme attributes, if any.
		layer.mThemeAttrs = a.extractThemeAttrs();

		layer.mInsetL = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_left, layer.mInsetL);
		layer.mInsetT = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_top, layer.mInsetT);
		layer.mInsetR = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_right, layer.mInsetR);
		layer.mInsetB = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_bottom, layer.mInsetB);
		layer.mInsetS = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_start, layer.mInsetS);
		layer.mInsetE = a.getDimensionPixelOffset(
		R.styleable.LayerDrawableItem_end, layer.mInsetE);
		layer.mWidth = a.getDimensionPixelSize(
		R.styleable.LayerDrawableItem_width, layer.mWidth);
		layer.mHeight = a.getDimensionPixelSize(
		R.styleable.LayerDrawableItem_height, layer.mHeight);
		layer.mGravity = a.getInteger(
		R.styleable.LayerDrawableItem_gravity, layer.mGravity);
		layer.mId = a.getResourceId(R.styleable.LayerDrawableItem_id, layer.mId);
		state.mThemeAttrs = a.extractThemeAttrs();

		final Drawable dr = a.getDrawable(R.styleable.LayerDrawableItem_drawable);
		if (dr != null) {
		layer.mDrawable = dr;
		final int N = a.getIndexCount();
		for (int i = 0; i < N; i++) {
		final int attr = a.getIndex(i);
		switch (attr) {
		case R.styleable.LayerDrawable_opacity:
		state.mOpacityOverride = a.getInt(attr, state.mOpacityOverride);
		break;
		case R.styleable.LayerDrawable_paddingTop:
		state.mPaddingTop = a.getDimensionPixelOffset(attr, state.mPaddingTop);
		break;
		case R.styleable.LayerDrawable_paddingBottom:
		state.mPaddingBottom = a.getDimensionPixelOffset(attr, state.mPaddingBottom);
		break;
		case R.styleable.LayerDrawable_paddingLeft:
		state.mPaddingLeft = a.getDimensionPixelOffset(attr, state.mPaddingLeft);
		break;
		case R.styleable.LayerDrawable_paddingRight:
		state.mPaddingRight = a.getDimensionPixelOffset(attr, state.mPaddingRight);
		break;
		case R.styleable.LayerDrawable_paddingStart:
		state.mPaddingStart = a.getDimensionPixelOffset(attr, state.mPaddingStart);
		break;
		case R.styleable.LayerDrawable_paddingEnd:
		state.mPaddingEnd = a.getDimensionPixelOffset(attr, state.mPaddingEnd);
		break;
		case R.styleable.LayerDrawable_autoMirrored:
		state.mAutoMirrored = a.getBoolean(attr, state.mAutoMirrored);
		break;
		case R.styleable.LayerDrawable_paddingMode:
		state.mPaddingMode = a.getInteger(attr, state.mPaddingMode);
		break;
		}
		}

		@Override
		public void applyTheme(Theme t) {
		super.applyTheme(t);

		final LayerState state = mLayerState;
		if (state == null) {
		return;
		}

		if (state.mThemeAttrs != null) {
		final TypedArray a = t.resolveAttributes(state.mThemeAttrs, R.styleable.LayerDrawable);
		updateStateFromTypedArray(a);
		a.recycle();
		}
		private void updateLayerFromTypedArray(@NonNull ChildDrawable layer, @NonNull TypedArray a) {
		final LayerState state = mLayerState;

		final ChildDrawable[] array = state.mChildren;
		final int N = state.mNum;
		for (int i = 0; i < N; i++) {
		final ChildDrawable layer = array[i];
		if (layer.mThemeAttrs != null) {
		final TypedArray a = t.resolveAttributes(layer.mThemeAttrs,
		R.styleable.LayerDrawableItem);
		updateLayerFromTypedArray(layer, a);
		a.recycle();
		}
		// Account for any configuration changes.
		state.mChildrenChangingConfigurations \|= a.getChangingConfigurations();

		final Drawable d = layer.mDrawable;
		if (d != null && d.canApplyTheme()) {
		d.applyTheme(t);
		// Extract the theme attributes, if any.
		layer.mThemeAttrs = a.extractThemeAttrs();

		// Update cached mask of child changing configurations.
		state.mChildrenChangingConfigurations \|= d.getChangingConfigurations();
		final int N = a.getIndexCount();
		for (int i = 0; i < N; i++) {
		final int attr = a.getIndex(i);
		switch (attr) {
		case R.styleable.LayerDrawableItem_left:
		layer.mInsetL = a.getDimensionPixelOffset(attr, layer.mInsetL);
		break;
		case R.styleable.LayerDrawableItem_top:
		layer.mInsetT = a.getDimensionPixelOffset(attr, layer.mInsetT);
		break;
		case R.styleable.LayerDrawableItem_right:
		layer.mInsetR = a.getDimensionPixelOffset(attr, layer.mInsetR);
		break;
		case R.styleable.LayerDrawableItem_bottom:
		layer.mInsetB = a.getDimensionPixelOffset(attr, layer.mInsetB);
		break;
		case R.styleable.LayerDrawableItem_start:
		layer.mInsetS = a.getDimensionPixelOffset(attr, layer.mInsetS);
		break;
		case R.styleable.LayerDrawableItem_end:
		layer.mInsetE = a.getDimensionPixelOffset(attr, layer.mInsetE);
		break;
		case R.styleable.LayerDrawableItem_width:
		layer.mWidth = a.getDimensionPixelSize(attr, layer.mWidth);
		break;
		case R.styleable.LayerDrawableItem_height:
		layer.mHeight = a.getDimensionPixelSize(attr, layer.mHeight);
		break;
		case R.styleable.LayerDrawableItem_gravity:
		layer.mGravity = a.getInteger(attr, layer.mGravity);
		break;
		case R.styleable.LayerDrawableItem_id:
		layer.mId = a.getResourceId(attr, layer.mId);
		break;
		}
		}

		ensurePadding();
		final Drawable dr = a.getDrawable(R.styleable.LayerDrawableItem_drawable);
		if (dr != null) {
		layer.mDrawable = dr;
		}
		}

		@Override
		@@ -368,7 +415,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		* @param layer The layer to add.
		* @return The index of the layer.
		*/
		int addLayer(ChildDrawable layer) {
		int addLayer(@NonNull ChildDrawable layer) {
		final LayerState st = mLayerState;
		final int N = st.mChildren != null ? st.mChildren.length : 0;
		final int i = st.mNum;
		@@ -418,7 +465,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		}

		private ChildDrawable createLayer(Drawable dr) {
		final ChildDrawable layer = new ChildDrawable();
		final ChildDrawable layer = new ChildDrawable(mLayerState.mDensity);
		layer.mDrawable = dr;
		return layer;
		}
		@@ -1708,6 +1755,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		static class ChildDrawable {
		public Drawable mDrawable;
		public int[] mThemeAttrs;
		public int mDensity = DisplayMetrics.DENSITY_DEFAULT;
		public int mInsetL, mInsetT, mInsetR, mInsetB;
		public int mInsetS = UNDEFINED_INSET;
		public int mInsetE = UNDEFINED_INSET;
		@@ -1716,11 +1764,12 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		public int mGravity = Gravity.NO_GRAVITY;
		public int mId = View.NO_ID;

		ChildDrawable() {
		// Default empty constructor.
		ChildDrawable(int density) {
		mDensity = density;
		}

		ChildDrawable(ChildDrawable orig, LayerDrawable owner, Resources res) {
		ChildDrawable(@NonNull ChildDrawable orig, @NonNull LayerDrawable owner,
		@Nullable Resources res) {
		final Drawable dr = orig.mDrawable;
		final Drawable clone;
		if (dr != null) {
		@@ -1750,19 +1799,58 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		mHeight = orig.mHeight;
		mGravity = orig.mGravity;
		mId = orig.mId;

		final int densityDpi = res == null ? orig.mDensity : res.getDisplayMetrics().densityDpi;
		mDensity = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi;

		if (orig.mDensity != mDensity) {
		applyDensityScaling(orig.mDensity, mDensity);
		}
		}

		public boolean canApplyTheme() {
		return mThemeAttrs != null
		\|\| (mDrawable != null && mDrawable.canApplyTheme());
		}

		public final void setDensity(int targetDensity) {
		if (mDensity != targetDensity) {
		final int sourceDensity = mDensity;
		mDensity = targetDensity;

		applyDensityScaling(sourceDensity, targetDensity);
		}
		}

		private void applyDensityScaling(int sourceDensity, int targetDensity) {
		mInsetL = Bitmap.scaleFromDensity(mInsetL, sourceDensity, targetDensity);
		mInsetT = Bitmap.scaleFromDensity(mInsetT, sourceDensity, targetDensity);
		mInsetR = Bitmap.scaleFromDensity(mInsetR, sourceDensity, targetDensity);
		mInsetB = Bitmap.scaleFromDensity(mInsetB, sourceDensity, targetDensity);
		if (mInsetS != UNDEFINED_INSET) {
		mInsetS = Bitmap.scaleFromDensity(mInsetS, sourceDensity, targetDensity);
		}
		if (mInsetE != UNDEFINED_INSET) {
		mInsetE = Bitmap.scaleFromDensity(mInsetE, sourceDensity, targetDensity);
		}
		if (mWidth > 0) {
		mWidth = Bitmap.scaleFromDensity(mWidth, sourceDensity, targetDensity);
		}
		if (mHeight > 0) {
		mHeight = Bitmap.scaleFromDensity(mHeight, sourceDensity, targetDensity);
		}
		}
		}

		static class LayerState extends ConstantState {
		private int[] mThemeAttrs;

		int mNum;
		ChildDrawable[] mChildren;
		int[] mThemeAttrs;

		int mDensity;

		// These values all correspond to mDensity.
		int mPaddingTop = -1;
		int mPaddingBottom = -1;
		int mPaddingLeft = -1;
		@@ -1784,7 +1872,19 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {

		private int mPaddingMode = PADDING_MODE_NEST;

		LayerState(LayerState orig, LayerDrawable owner, Resources res) {
		LayerState(@Nullable LayerState orig, @NonNull LayerDrawable owner,
		@Nullable Resources res) {
		final int densityDpi;
		if (res != null) {
		densityDpi = res.getDisplayMetrics().densityDpi;
		} else if (orig != null) {
		densityDpi = orig.mDensity;
		} else {
		densityDpi = 0;
		}

		mDensity = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi;

		if (orig != null) {
		final ChildDrawable[] origChildDrawable = orig.mChildren;
		final int N = orig.mNum;
		@@ -1814,12 +1914,56 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		mPaddingStart = orig.mPaddingStart;
		mPaddingEnd = orig.mPaddingEnd;
		mOpacityOverride = orig.mOpacityOverride;

		if (orig.mDensity != mDensity) {
		applyDensityScaling(orig.mDensity, mDensity);
		}
		} else {
		mNum = 0;
		mChildren = null;
		}
		}

		public final void setDensity(int targetDensity) {
		if (mDensity != targetDensity) {
		final int sourceDensity = mDensity;
		mDensity = targetDensity;

		onDensityChanged(sourceDensity, targetDensity);
		}
		}

		protected void onDensityChanged(int sourceDensity, int targetDensity) {
		applyDensityScaling(sourceDensity, targetDensity);
		}

		private void applyDensityScaling(int sourceDensity, int targetDensity) {
		if (mPaddingLeft > 0) {
		mPaddingLeft = Bitmap.scaleFromDensity(
		mPaddingLeft, sourceDensity, targetDensity);
		}
		if (mPaddingTop > 0) {
		mPaddingTop = Bitmap.scaleFromDensity(
		mPaddingTop, sourceDensity, targetDensity);
		}
		if (mPaddingRight > 0) {
		mPaddingRight = Bitmap.scaleFromDensity(
		mPaddingRight, sourceDensity, targetDensity);
		}
		if (mPaddingBottom > 0) {
		mPaddingBottom = Bitmap.scaleFromDensity(
		mPaddingBottom, sourceDensity, targetDensity);
		}
		if (mPaddingStart > 0) {
		mPaddingStart = Bitmap.scaleFromDensity(
		mPaddingStart, sourceDensity, targetDensity);
		}
		if (mPaddingEnd > 0) {
		mPaddingEnd = Bitmap.scaleFromDensity(
		mPaddingEnd, sourceDensity, targetDensity);
		}
		}

		@Override
		public boolean canApplyTheme() {
		if (mThemeAttrs != null \|\| super.canApplyTheme()) {
		@@ -1844,7 +1988,7 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		}

		@Override
		public Drawable newDrawable(Resources res) {
		public Drawable newDrawable(@Nullable Resources res) {
		return new LayerDrawable(this, res);
		}

graphics/java/android/graphics/drawable/RippleDrawable.java

+29 −22

Original line number	Diff line number	Diff line
		@@ -409,18 +409,20 @@ public class RippleDrawable extends LayerDrawable {
		}

		@Override
		public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme)
		public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
		@NonNull AttributeSet attrs, @Nullable Theme theme)
		throws XmlPullParserException, IOException {
		final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.RippleDrawable);
		updateStateFromTypedArray(a);
		a.recycle();

		// Force padding default to STACK before inflating.
		setPaddingMode(PADDING_MODE_STACK);

		// Inflation will advance the XmlPullParser and AttributeSet.
		super.inflate(r, parser, attrs, theme);

		setTargetDensity(r.getDisplayMetrics());
		updateStateFromTypedArray(a);
		verifyRequiredAttributes(a);
		a.recycle();

		updateLocalState();
		}
		@@ -461,7 +463,7 @@ public class RippleDrawable extends LayerDrawable {
		/**
		* Initializes the constant state from the values in the typed array.
		*/
		private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
		private void updateStateFromTypedArray(@NonNull TypedArray a) throws XmlPullParserException {
		final RippleState state = mState;

		// Account for any configuration changes.
		@@ -477,11 +479,9 @@ public class RippleDrawable extends LayerDrawable {

		mState.mMaxRadius = a.getDimensionPixelSize(
		R.styleable.RippleDrawable_radius, mState.mMaxRadius);

		verifyRequiredAttributes(a);
		}

		private void verifyRequiredAttributes(TypedArray a) throws XmlPullParserException {
		private void verifyRequiredAttributes(@NonNull TypedArray a) throws XmlPullParserException {
		if (mState.mColor == null && (mState.mTouchThemeAttrs == null
		\|\| mState.mTouchThemeAttrs[R.styleable.RippleDrawable_color] == 0)) {
		throw new XmlPullParserException(a.getPositionDescription() +
		@@ -489,20 +489,8 @@ public class RippleDrawable extends LayerDrawable {
		}
		}

		/**
		* Set the density at which this drawable will be rendered.
		*
		* @param metrics The display metrics for this drawable.
		*/
		private void setTargetDensity(DisplayMetrics metrics) {
		if (mDensity != metrics.density) {
		mDensity = metrics.density;
		invalidateSelf(false);
		}
		}

		@Override
		public void applyTheme(Theme t) {
		public void applyTheme(@NonNull Theme t) {
		super.applyTheme(t);

		final RippleState state = mState;
		@@ -515,6 +503,7 @@ public class RippleDrawable extends LayerDrawable {
		R.styleable.RippleDrawable);
		try {
		updateStateFromTypedArray(a);
		verifyRequiredAttributes(a);
		} catch (XmlPullParserException e) {
		throw new RuntimeException(e);
		} finally {
		@@ -555,7 +544,8 @@ public class RippleDrawable extends LayerDrawable {
		mBackground = new RippleBackground(this, mHotspotBounds, mForceSoftware);
		}

		mBackground.setup(mState.mMaxRadius, mDensity);
		final float densityScale = mState.mDensity * DisplayMetrics.DENSITY_DEFAULT_SCALE;
		mBackground.setup(mState.mMaxRadius, densityScale);
		mBackground.enter(focused);
		}

		@@ -1002,6 +992,23 @@ public class RippleDrawable extends LayerDrawable {
		mTouchThemeAttrs = origs.mTouchThemeAttrs;
		mColor = origs.mColor;
		mMaxRadius = origs.mMaxRadius;

		if (origs.mDensity != mDensity) {
		applyDensityScaling(orig.mDensity, mDensity);
		}
		}
		}

		@Override
		protected void onDensityChanged(int sourceDensity, int targetDensity) {
		super.onDensityChanged(sourceDensity, targetDensity);

		applyDensityScaling(sourceDensity, targetDensity);
		}

		private void applyDensityScaling(int sourceDensity, int targetDensity) {
		if (mMaxRadius != RADIUS_AUTO) {
		mMaxRadius = Bitmap.scaleFromDensity(mMaxRadius, sourceDensity, targetDensity);
		}
		}