API for adding layers to LayerDrawable (d8c18e81) · Commits · e / os / android_frameworks_base

api/current.txt

+3 −0

Original line number	Diff line number	Diff line
		@@ -11985,8 +11985,10 @@ package android.graphics.drawable {

		public class LayerDrawable extends android.graphics.drawable.Drawable implements android.graphics.drawable.Drawable.Callback {
		ctor public LayerDrawable(android.graphics.drawable.Drawable[]);
		method public int addLayer(android.graphics.drawable.Drawable);
		method public void draw(android.graphics.Canvas);
		method public android.graphics.drawable.Drawable findDrawableByLayerId(int);
		method public int findIndexByLayerId(int);
		method public android.graphics.drawable.Drawable getDrawable(int);
		method public int getId(int);
		method public int getLayerGravity(int);
		@@ -11999,6 +12001,7 @@ package android.graphics.drawable {
		method public void scheduleDrawable(android.graphics.drawable.Drawable, java.lang.Runnable, long);
		method public void setAlpha(int);
		method public void setColorFilter(android.graphics.ColorFilter);
		method public void setDrawable(int, android.graphics.drawable.Drawable);
		method public boolean setDrawableByLayerId(int, android.graphics.drawable.Drawable);
		method public void setId(int, int);
		method public void setLayerGravity(int, int);

api/system-current.txt

+3 −0

Original line number	Diff line number	Diff line
		@@ -12259,8 +12259,10 @@ package android.graphics.drawable {

		public class LayerDrawable extends android.graphics.drawable.Drawable implements android.graphics.drawable.Drawable.Callback {
		ctor public LayerDrawable(android.graphics.drawable.Drawable[]);
		method public int addLayer(android.graphics.drawable.Drawable);
		method public void draw(android.graphics.Canvas);
		method public android.graphics.drawable.Drawable findDrawableByLayerId(int);
		method public int findIndexByLayerId(int);
		method public android.graphics.drawable.Drawable getDrawable(int);
		method public int getId(int);
		method public int getLayerGravity(int);
		@@ -12273,6 +12275,7 @@ package android.graphics.drawable {
		method public void scheduleDrawable(android.graphics.drawable.Drawable, java.lang.Runnable, long);
		method public void setAlpha(int);
		method public void setColorFilter(android.graphics.ColorFilter);
		method public void setDrawable(int, android.graphics.drawable.Drawable);
		method public boolean setDrawableByLayerId(int, android.graphics.drawable.Drawable);
		method public void setId(int, int);
		method public void setLayerGravity(int, int);

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

+127 −44

Original line number	Diff line number	Diff line
		@@ -322,7 +322,13 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		return false;
		}

		void addLayer(ChildDrawable layer) {
		/**
		* Adds a new layer at the end of list of layers and returns its index.
		*
		* @param layer The layer to add.
		* @return The index of the layer.
		*/
		int addLayer(ChildDrawable layer) {
		final LayerState st = mLayerState;
		final int N = st.mChildren != null ? st.mChildren.length : 0;
		final int i = st.mNum;
		@@ -338,12 +344,13 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		st.mChildren[i] = layer;
		st.mNum++;
		st.invalidateCache();
		return i;
		}

		/**
		* Add a new layer to this drawable. The new layer is identified by an id.
		*
		* @param layer The drawable to add as a layer.
		* @param dr The drawable to add as a layer.
		* @param themeAttrs Theme attributes extracted from the layer.
		* @param id The id of the new layer.
		* @param left The left padding of the new layer.
		@@ -351,12 +358,11 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		* @param right The right padding of the new layer.
		* @param bottom The bottom padding of the new layer.
		*/
		ChildDrawable addLayer(Drawable layer, int[] themeAttrs, int id, int left, int top, int right,
		int bottom) {
		final ChildDrawable childDrawable = new ChildDrawable();
		ChildDrawable addLayer(Drawable dr, int[] themeAttrs, int id,
		int left, int top, int right, int bottom) {
		final ChildDrawable childDrawable = createLayer(dr);
		childDrawable.mId = id;
		childDrawable.mThemeAttrs = themeAttrs;
		childDrawable.mDrawable = layer;
		childDrawable.mDrawable.setAutoMirrored(isAutoMirrored());
		childDrawable.mInsetL = left;
		childDrawable.mInsetT = top;
		@@ -365,12 +371,31 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {

		addLayer(childDrawable);

		mLayerState.mChildrenChangingConfigurations \|= layer.getChangingConfigurations();
		layer.setCallback(this);
		mLayerState.mChildrenChangingConfigurations \|= dr.getChangingConfigurations();
		dr.setCallback(this);

		return childDrawable;
		}

		private ChildDrawable createLayer(Drawable dr) {
		final ChildDrawable layer = new ChildDrawable();
		layer.mDrawable = dr;
		return layer;
		}

		/**
		* Adds a new layer containing the specified {@code drawable} to the end of
		* the layer list and returns its index.
		*
		* @param dr The drawable to add as a new layer.
		* @return The index of the new layer.
		*/
		public int addLayer(Drawable dr) {
		final ChildDrawable layer = createLayer(dr);
		final int index = addLayer(layer);
		return index;
		}

		/**
		* Looks for a layer with the given ID and returns its {@link Drawable}.
		* <p>
		@@ -395,45 +420,46 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		/**
		* Sets the ID of a layer.
		*
		* @param index The index of the layer which will received the ID.
		* @param id The ID to assign to the layer.
		* @param index The index of the layer to modify, must be in the range
		* {@code 0...getNumberOfLayers()-1}.
		* @param id The id to assign to the layer.
		*
		* @see #getId(int)
		* @attr ref android.R.styleable#LayerDrawableItem_id
		*/
		public void setId(int index, int id) {
		mLayerState.mChildren[index].mId = id;
		}

		/**
		* Returns the number of layers contained within this.
		* @return The number of layers.
		*/
		public int getNumberOfLayers() {
		return mLayerState.mNum;
		}

		/**
		* Returns the drawable at the specified layer index.
		* Returns the ID of the specified layer.
		*
		* @param index The layer index of the drawable to retrieve.
		* @param index The index of the layer, must be in the range
		* {@code 0...getNumberOfLayers()-1}.
		* @return The id of the layer or {@link android.view.View#NO_ID} if the
		* layer has no id.
		*
		* @return The {@link android.graphics.drawable.Drawable} at the specified layer index.
		* @see #setId(int, int)
		* @attr ref android.R.styleable#LayerDrawableItem_id
		*/
		public Drawable getDrawable(int index) {
		return mLayerState.mChildren[index].mDrawable;
		public int getId(int index) {
		if (index >= mLayerState.mNum) {
		throw new IndexOutOfBoundsException();
		}
		return mLayerState.mChildren[index].mId;
		}

		/**
		* Returns the id of the specified layer.
		*
		* @param index The index of the layer.
		* Returns the number of layers contained within this layer drawable.
		*
		* @return The id of the layer or {@link android.view.View#NO_ID} if the layer has no id.
		* @return The number of layers.
		*/
		public int getId(int index) {
		return mLayerState.mChildren[index].mId;
		public int getNumberOfLayers() {
		return mLayerState.mNum;
		}

		/**
		* Sets (or replaces) the {@link Drawable} for the layer with the given id.
		* Replaces the {@link Drawable} for the layer with the given id.
		*
		* @param id The layer ID to search for.
		* @param drawable The replacement {@link Drawable}.
		@@ -441,11 +467,54 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {
		* the id was not found).
		*/
		public boolean setDrawableByLayerId(int id, Drawable drawable) {
		final int index = findIndexByLayerId(id);
		if (index < 0) {
		return false;
		}

		setDrawable(index, drawable);
		return true;
		}

		/**
		* Returns the layer with the specified {@code id}.
		* <p>
		* If multiple layers have the same ID, returns the layer with the lowest
		* index.
		*
		* @param id The ID of the layer to return.
		* @return The index of the layer with the specified ID.
		*/
		public int findIndexByLayerId(int id) {
		final ChildDrawable[] layers = mLayerState.mChildren;
		final int N = mLayerState.mNum;
		for (int i = 0; i < N; i++) {
		final ChildDrawable childDrawable = layers[i];
		if (childDrawable.mId == id) {
		return i;
		}
		}

		return -1;
		}

		/**
		* Sets the drawable for the layer at the specified index.
		*
		* @param index The index of the layer to modify, must be in the range
		* {@code 0...getNumberOfLayers()-1}.
		* @param drawable The drawable to set for the layer.
		*
		* @see #getDrawable(int)
		* @attr ref android.R.styleable#LayerDrawableItem_drawable
		*/
		public void setDrawable(int index, Drawable drawable) {
		if (index >= mLayerState.mNum) {
		throw new IndexOutOfBoundsException();
		}

		final ChildDrawable[] layers = mLayerState.mChildren;
		final ChildDrawable childDrawable = layers[index];
		if (childDrawable.mDrawable != null) {
		if (drawable != null) {
		final Rect bounds = childDrawable.mDrawable.getBounds();
		@@ -457,15 +526,29 @@ public class LayerDrawable extends Drawable implements Drawable.Callback {

		if (drawable != null) {
		drawable.setCallback(this);
		drawable.setLayoutDirection(getLayoutDirection());
		drawable.setLevel(getLevel());
		}

		childDrawable.mDrawable = drawable;
		mLayerState.invalidateCache();
		return true;
		}
		}

		return false;
		/**
		* Returns the drawable for the layer at the specified index.
		*
		* @param index The index of the layer, must be in the range
		* {@code 0...getNumberOfLayers()-1}.
		* @return The {@link Drawable} at the specified layer index.
		*
		* @see #setDrawable(int, Drawable)
		* @attr ref android.R.styleable#LayerDrawableItem_drawable
		*/
		public Drawable getDrawable(int index) {
		if (index >= mLayerState.mNum) {
		throw new IndexOutOfBoundsException();
		}
		return mLayerState.mChildren[index].mDrawable;
		}

		/**