827 lines
30 KiB
Java
827 lines
30 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.graphics.drawable;
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import java.io.InputStream;
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import java.io.IOException;
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import java.util.Arrays;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.graphics.*;
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import android.util.AttributeSet;
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import android.util.StateSet;
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import android.util.Xml;
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import android.util.TypedValue;
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/**
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* A Drawable is a general abstraction for "something that can be drawn." Most
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* often you will deal with Drawable as the type of resource retrieved for
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* drawing things to the screen; the Drawable class provides a generic API for
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* dealing with an underlying visual resource that may take a variety of forms.
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* Unlike a {@link android.view.View}, a Drawable does not have any facility to
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* receive events or otherwise interact with the user.
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*
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* <p>In addition to simple drawing, Drawable provides a number of generic
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* mechanisms for its client to interact with what is being drawn:
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*
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* <ul>
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* <li> The {@link #setBounds} method <var>must</var> be called to tell the
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* Drawable where it is drawn and how large it should be. All Drawables
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* should respect the requested size, often simply by scaling their
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* imagery. A client can find the preferred size for some Drawables with
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* the {@link #getIntrinsicHeight} and {@link #getIntrinsicWidth} methods.
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*
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* <li> The {@link #getPadding} method can return from some Drawables
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* information about how to frame content that is placed inside of them.
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* For example, a Drawable that is intended to be the frame for a button
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* widget would need to return padding that correctly places the label
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* inside of itself.
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*
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* <li> The {@link #setState} method allows the client to tell the Drawable
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* in which state it is to be drawn, such as "focused", "selected", etc.
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* Some drawables may modify their imagery based on the selected state.
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*
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* <li> The {@link #setLevel} method allows the client to supply a single
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* continuous controller that can modify the Drawable is displayed, such as
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* a battery level or progress level. Some drawables may modify their
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* imagery based on the current level.
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*
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* <li> A Drawable can perform animations by calling back to its client
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* through the {@link Callback} interface. All clients should support this
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* interface (via {@link #setCallback}) so that animations will work. A
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* simple way to do this is through the system facilities such as
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* {@link android.view.View#setBackgroundDrawable(Drawable)} and
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* {@link android.widget.ImageView}.
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* </ul>
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*
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* Though usually not visible to the application, Drawables may take a variety
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* of forms:
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*
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* <ul>
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* <li> <b>Bitmap</b>: the simplest Drawable, a PNG or JPEG image.
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* <li> <b>Nine Patch</b>: an extension to the PNG format allows it to
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* specify information about how to stretch it and place things inside of
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* it.
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* <li> <b>Shape</b>: contains simple drawing commands instead of a raw
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* bitmap, allowing it to resize better in some cases.
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* <li> <b>Layers</b>: a compound drawable, which draws multiple underlying
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* drawables on top of each other.
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* <li> <b>States</b>: a compound drawable that selects one of a set of
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* drawables based on its state.
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* <li> <b>Levels</b>: a compound drawable that selects one of a set of
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* drawables based on its level.
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* <li> <b>Scale</b>: a compound drawable with a single child drawable,
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* whose overall size is modified based on the current level.
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* </ul>
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* <p>For information and examples of creating drawable resources (XML or bitmap files that
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* can be loaded in code), see <a href="{@docRoot}guide/topics/resources/resources-i18n.html">Resources
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* and Internationalization</a>.
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*/
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public abstract class Drawable {
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private static final Rect ZERO_BOUNDS_RECT = new Rect();
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private int[] mStateSet = StateSet.WILD_CARD;
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private int mLevel = 0;
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private int mChangingConfigurations = 0;
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private Rect mBounds = ZERO_BOUNDS_RECT;
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/*package*/ Callback mCallback = null;
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private boolean mVisible = true;
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/**
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* Draw in its bounds (set via setBounds) respecting optional effects such
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* as alpha (set via setAlpha) and color filter (set via setColorFilter).
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*
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* @param canvas The canvas to draw into
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*/
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public abstract void draw(Canvas canvas);
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/**
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* Specify a bounding rectangle for the Drawable. This is where the drawable
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* will draw when its draw() method is called.
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*/
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public void setBounds(int left, int top, int right, int bottom) {
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Rect oldBounds = mBounds;
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if (oldBounds == ZERO_BOUNDS_RECT) {
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oldBounds = mBounds = new Rect();
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}
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if (oldBounds.left != left || oldBounds.top != top ||
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oldBounds.right != right || oldBounds.bottom != bottom) {
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mBounds.set(left, top, right, bottom);
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onBoundsChange(mBounds);
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}
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}
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/**
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* Specify a bounding rectangle for the Drawable. This is where the drawable
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* will draw when its draw() method is called.
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*/
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public void setBounds(Rect bounds) {
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setBounds(bounds.left, bounds.top, bounds.right, bounds.bottom);
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}
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/**
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* Return a copy of the drawable's bounds in the specified Rect (allocated
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* by the caller). The bounds specify where this will draw when its draw()
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* method is called.
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*
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* @param bounds Rect to receive the drawable's bounds (allocated by the
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* caller).
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*/
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public final void copyBounds(Rect bounds) {
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bounds.set(mBounds);
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}
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/**
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* Return a copy of the drawable's bounds in a new Rect. This returns the
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* same values as getBounds(), but the returned object is guaranteed to not
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* be changed later by the drawable (i.e. it retains no reference to this
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* rect). If the caller already has a Rect allocated, call copyBounds(rect).
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*
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* @return A copy of the drawable's bounds
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*/
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public final Rect copyBounds() {
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return new Rect(mBounds);
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}
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/**
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* Return the drawable's bounds Rect. Note: for efficiency, the returned
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* object may be the same object stored in the drawable (though this is not
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* guaranteed), so if a persistent copy of the bounds is needed, call
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* copyBounds(rect) instead.
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* You should also not change the object returned by this method as it may
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* be the same object stored in the drawable.
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*
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* @return The bounds of the drawable (which may change later, so caller
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* beware). DO NOT ALTER the returned object as it may change the
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* stored bounds of this drawable.
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*
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* @see #copyBounds()
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* @see #copyBounds(android.graphics.Rect)
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*/
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public final Rect getBounds() {
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if (mBounds == ZERO_BOUNDS_RECT) {
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mBounds = new Rect();
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}
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return mBounds;
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}
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/**
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* Set a mask of the configuration parameters for which this drawable
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* may change, requiring that it be re-created.
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*
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* @param configs A mask of the changing configuration parameters, as
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* defined by {@link android.content.res.Configuration}.
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*
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* @see android.content.res.Configuration
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*/
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public void setChangingConfigurations(int configs) {
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mChangingConfigurations = configs;
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}
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/**
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* Return a mask of the configuration parameters for which this drawable
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* mau change, requiring that it be re-created. The default implementation
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* returns whatever was provided through
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* {@link #setChangingConfigurations(int)} or 0 by default. Subclasses
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* may extend this to or in the changing configurations of any other
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* drawables they hold.
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*
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* @return Returns a mask of the changing configuration parameters, as
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* defined by {@link android.content.res.Configuration}.
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*
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* @see android.content.res.Configuration
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*/
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public int getChangingConfigurations() {
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return mChangingConfigurations;
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}
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/**
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* Set to true to have the drawable dither its colors when drawn to a device
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* with fewer than 8-bits per color component. This can improve the look on
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* those devices, but can also slow down the drawing a little.
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*/
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public void setDither(boolean dither) {}
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/**
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* Set to true to have the drawable filter its bitmap when scaled or rotated
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* (for drawables that use bitmaps). If the drawable does not use bitmaps,
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* this call is ignored. This can improve the look when scaled or rotated,
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* but also slows down the drawing.
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*/
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public void setFilterBitmap(boolean filter) {}
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/**
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* Implement this interface if you want to create an animated drawable that
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* extends {@link android.graphics.drawable.Drawable Drawable}.
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* Upon retrieving a drawable, use
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* {@link Drawable#setCallback(android.graphics.drawable.Drawable.Callback)}
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* to supply your implementation of the interface to the drawable; it uses
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* this interface to schedule and execute animation changes.
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*/
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public static interface Callback {
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/**
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* Called when the drawable needs to be redrawn. A view at this point
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* should invalidate itself (or at least the part of itself where the
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* drawable appears).
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*
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* @param who The drawable that is requesting the update.
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*/
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public void invalidateDrawable(Drawable who);
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/**
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* A Drawable can call this to schedule the next frame of its
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* animation. An implementation can generally simply call
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* {@link android.os.Handler#postAtTime(Runnable, Object, long)} with
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* the parameters <var>(what, who, when)</var> to perform the
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* scheduling.
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*
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* @param who The drawable being scheduled.
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* @param what The action to execute.
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* @param when The time (in milliseconds) to run. The timebase is
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* {@link android.os.SystemClock#uptimeMillis}
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*/
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public void scheduleDrawable(Drawable who, Runnable what, long when);
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/**
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* A Drawable can call this to unschedule an action previously
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* scheduled with {@link #scheduleDrawable}. An implementation can
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* generally simply call
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* {@link android.os.Handler#removeCallbacks(Runnable, Object)} with
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* the parameters <var>(what, who)</var> to unschedule the drawable.
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*
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* @param who The drawable being unscheduled.
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* @param what The action being unscheduled.
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*/
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public void unscheduleDrawable(Drawable who, Runnable what);
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}
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/**
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* Bind a {@link Callback} object to this Drawable. Required for clients
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* that want to support animated drawables.
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*
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* @param cb The client's Callback implementation.
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*/
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public final void setCallback(Callback cb) {
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mCallback = cb;
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}
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/**
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* Use the current {@link Callback} implementation to have this Drawable
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* redrawn. Does nothing if there is no Callback attached to the
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* Drawable.
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*
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* @see Callback#invalidateDrawable
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*/
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public void invalidateSelf()
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{
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if (mCallback != null) {
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mCallback.invalidateDrawable(this);
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}
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}
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/**
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* Use the current {@link Callback} implementation to have this Drawable
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* scheduled. Does nothing if there is no Callback attached to the
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* Drawable.
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*
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* @param what The action being scheduled.
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* @param when The time (in milliseconds) to run.
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*
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* @see Callback#scheduleDrawable
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*/
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public void scheduleSelf(Runnable what, long when)
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{
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if (mCallback != null) {
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mCallback.scheduleDrawable(this, what, when);
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}
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}
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/**
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* Use the current {@link Callback} implementation to have this Drawable
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* unscheduled. Does nothing if there is no Callback attached to the
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* Drawable.
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*
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* @param what The runnable that you no longer want called.
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*
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* @see Callback#unscheduleDrawable
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*/
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public void unscheduleSelf(Runnable what)
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{
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if (mCallback != null) {
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mCallback.unscheduleDrawable(this, what);
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}
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}
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/**
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* Specify an alpha value for the drawable. 0 means fully transparent, and
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* 255 means fully opaque.
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*/
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public abstract void setAlpha(int alpha);
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/**
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* Specify an optional colorFilter for the drawable. Pass null to remove
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* any filters.
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*/
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public abstract void setColorFilter(ColorFilter cf);
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/**
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* Specify a color and porterduff mode to be the colorfilter for this
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* drawable.
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*/
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public void setColorFilter(int color, PorterDuff.Mode mode) {
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setColorFilter(new PorterDuffColorFilter(color, mode));
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}
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public void clearColorFilter() {
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setColorFilter(null);
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}
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/**
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* Indicates whether this view will change its appearance based on state.
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* Clients can use this to determine whether it is necessary to calculate
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* their state and call setState.
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*
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* @return True if this view changes its appearance based on state, false
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* otherwise.
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*
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* @see #setState(int[])
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*/
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public boolean isStateful() {
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return false;
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}
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/**
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* Specify a set of states for the drawable. These are use-case specific,
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* so see the relevant documentation. As an example, the background for
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* widgets like Button understand the following states:
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* [{@link android.R.attr#state_focused},
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* {@link android.R.attr#state_pressed}].
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*
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* <p>If the new state you are supplying causes the appearance of the
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* Drawable to change, then it is responsible for calling
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* {@link #invalidateSelf} in order to have itself redrawn, <em>and</em>
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* true will be returned from this function.
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*
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* <p>Note: The Drawable holds a reference on to <var>stateSet</var>
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* until a new state array is given to it, so you must not modify this
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* array during that time.</p>
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*
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* @param stateSet The new set of states to be displayed.
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*
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* @return Returns true if this change in state has caused the appearance
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* of the Drawable to change (hence requiring an invalidate), otherwise
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* returns false.
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*/
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public boolean setState(final int[] stateSet) {
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if (!Arrays.equals(mStateSet, stateSet)) {
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mStateSet = stateSet;
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return onStateChange(stateSet);
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}
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return false;
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}
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/**
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* Describes the current state, as a union of primitve states, such as
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* {@link android.R.attr#state_focused},
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* {@link android.R.attr#state_selected}, etc.
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* Some drawables may modify their imagery based on the selected state.
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* @return An array of resource Ids describing the current state.
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*/
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public int[] getState() {
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return mStateSet;
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}
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/**
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* @return The current drawable that will be used by this drawable. For simple drawables, this
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* is just the drawable itself. For drawables that change state like
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* {@link StateListDrawable} and {@link LevelListDrawable} this will be the child drawable
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* currently in use.
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*/
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public Drawable getCurrent() {
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return this;
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}
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/**
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* Specify the level for the drawable. This allows a drawable to vary its
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* imagery based on a continuous controller, for example to show progress
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* or volume level.
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*
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* <p>If the new level you are supplying causes the appearance of the
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* Drawable to change, then it is responsible for calling
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* {@link #invalidateSelf} in order to have itself redrawn, <em>and</em>
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* true will be returned from this function.
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*
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* @param level The new level, from 0 (minimum) to 10000 (maximum).
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*
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* @return Returns true if this change in level has caused the appearance
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* of the Drawable to change (hence requiring an invalidate), otherwise
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* returns false.
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*/
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public final boolean setLevel(int level) {
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if (mLevel != level) {
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mLevel = level;
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return onLevelChange(level);
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}
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return false;
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}
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/**
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* Retrieve the current level.
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*
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* @return int Current level, from 0 (minimum) to 10000 (maximum).
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*/
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public final int getLevel() {
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return mLevel;
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}
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/**
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* Set whether this Drawable is visible. This generally does not impact
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* the Drawable's behavior, but is a hint that can be used by some
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* Drawables, for example, to decide whether run animations.
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*
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* @param visible Set to true if visible, false if not.
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* @param restart You can supply true here to force the drawable to behave
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* as if it has just become visible, even if it had last
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* been set visible. Used for example to force animations
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* to restart.
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*
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* @return boolean Returns true if the new visibility is different than
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* its previous state.
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*/
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public boolean setVisible(boolean visible, boolean restart) {
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boolean changed = mVisible != visible;
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mVisible = visible;
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return changed;
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}
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public final boolean isVisible() {
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return mVisible;
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}
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/**
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* Return the opacity/transparency of this Drawable. The returned value is
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* one of the abstract format constants in
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* {@link android.graphics.PixelFormat}:
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* {@link android.graphics.PixelFormat#UNKNOWN},
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* {@link android.graphics.PixelFormat#TRANSLUCENT},
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* {@link android.graphics.PixelFormat#TRANSPARENT}, or
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* {@link android.graphics.PixelFormat#OPAQUE}.
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*
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* <p>Generally a Drawable should be as conservative as possible with the
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* value it returns. For example, if it contains multiple child drawables
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* and only shows one of them at a time, if only one of the children is
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* TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be
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* returned. You can use the method {@link #resolveOpacity} to perform a
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* standard reduction of two opacities to the appropriate single output.
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*
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* <p>Note that the returned value does <em>not</em> take into account a
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* custom alpha or color filter that has been applied by the client through
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* the {@link #setAlpha} or {@link #setColorFilter} methods.
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*
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* @return int The opacity class of the Drawable.
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*
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* @see android.graphics.PixelFormat
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*/
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public abstract int getOpacity();
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/**
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* Return the appropriate opacity value for two source opacities. If
|
|
* either is UNKNOWN, that is returned; else, if either is TRANSLUCENT,
|
|
* that is returned; else, if either is TRANSPARENT, that is returned;
|
|
* else, OPAQUE is returned.
|
|
*
|
|
* <p>This is to help in implementing {@link #getOpacity}.
|
|
*
|
|
* @param op1 One opacity value.
|
|
* @param op2 Another opacity value.
|
|
*
|
|
* @return int The combined opacity value.
|
|
*
|
|
* @see #getOpacity
|
|
*/
|
|
public static int resolveOpacity(int op1, int op2) {
|
|
if (op1 == op2) {
|
|
return op1;
|
|
}
|
|
if (op1 == PixelFormat.UNKNOWN || op2 == PixelFormat.UNKNOWN) {
|
|
return PixelFormat.UNKNOWN;
|
|
}
|
|
if (op1 == PixelFormat.TRANSLUCENT || op2 == PixelFormat.TRANSLUCENT) {
|
|
return PixelFormat.TRANSLUCENT;
|
|
}
|
|
if (op1 == PixelFormat.TRANSPARENT || op2 == PixelFormat.TRANSPARENT) {
|
|
return PixelFormat.TRANSPARENT;
|
|
}
|
|
return PixelFormat.OPAQUE;
|
|
}
|
|
|
|
/**
|
|
* Returns a Region representing the part of the Drawable that is completely
|
|
* transparent. This can be used to perform drawing operations, identifying
|
|
* which parts of the target will not change when rendering the Drawable.
|
|
* The default implementation returns null, indicating no transparent
|
|
* region; subclasses can optionally override this to return an actual
|
|
* Region if they want to supply this optimization information, but it is
|
|
* not required that they do so.
|
|
*
|
|
* @return Returns null if the Drawables has no transparent region to
|
|
* report, else a Region holding the parts of the Drawable's bounds that
|
|
* are transparent.
|
|
*/
|
|
public Region getTransparentRegion() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Override this in your subclass to change appearance if you recognize the
|
|
* specified state.
|
|
*
|
|
* @return Returns true if the state change has caused the appearance of
|
|
* the Drawable to change (that is, it needs to be drawn), else false
|
|
* if it looks the same and there is no need to redraw it since its
|
|
* last state.
|
|
*/
|
|
protected boolean onStateChange(int[] state) { return false; }
|
|
/** Override this in your subclass to change appearance if you vary based
|
|
* on level.
|
|
* @return Returns true if the level change has caused the appearance of
|
|
* the Drawable to change (that is, it needs to be drawn), else false
|
|
* if it looks the same and there is no need to redraw it since its
|
|
* last level.
|
|
*/
|
|
protected boolean onLevelChange(int level) { return false; }
|
|
/**
|
|
* Override this in your subclass to change appearance if you recognize the
|
|
* specified state.
|
|
*/
|
|
protected void onBoundsChange(Rect bounds) {}
|
|
|
|
/**
|
|
* Return the intrinsic width of the underlying drawable object. Returns
|
|
* -1 if it has no intrinsic width, such as with a solid color.
|
|
*/
|
|
public int getIntrinsicWidth() {
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Return the intrinsic height of the underlying drawable object. Returns
|
|
* -1 if it has no intrinsic height, such as with a solid color.
|
|
*/
|
|
public int getIntrinsicHeight() {
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Returns the minimum width suggested by this Drawable. If a View uses this
|
|
* Drawable as a background, it is suggested that the View use at least this
|
|
* value for its width. (There will be some scenarios where this will not be
|
|
* possible.) This value should INCLUDE any padding.
|
|
*
|
|
* @return The minimum width suggested by this Drawable. If this Drawable
|
|
* doesn't have a suggested minimum width, 0 is returned.
|
|
*/
|
|
public int getMinimumWidth() {
|
|
final int intrinsicWidth = getIntrinsicWidth();
|
|
return intrinsicWidth > 0 ? intrinsicWidth : 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the minimum height suggested by this Drawable. If a View uses this
|
|
* Drawable as a background, it is suggested that the View use at least this
|
|
* value for its height. (There will be some scenarios where this will not be
|
|
* possible.) This value should INCLUDE any padding.
|
|
*
|
|
* @return The minimum height suggested by this Drawable. If this Drawable
|
|
* doesn't have a suggested minimum height, 0 is returned.
|
|
*/
|
|
public int getMinimumHeight() {
|
|
final int intrinsicHeight = getIntrinsicHeight();
|
|
return intrinsicHeight > 0 ? intrinsicHeight : 0;
|
|
}
|
|
|
|
/**
|
|
* Return in padding the insets suggested by this Drawable for placing
|
|
* content inside the drawable's bounds. Positive values move toward the
|
|
* center of the Drawable (set Rect.inset). Returns true if this drawable
|
|
* actually has a padding, else false. When false is returned, the padding
|
|
* is always set to 0.
|
|
*/
|
|
public boolean getPadding(Rect padding) {
|
|
padding.set(0, 0, 0, 0);
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Make this drawable mutable. This operation cannot be reversed. A mutable
|
|
* drawable is guaranteed to not share its state with any other drawable.
|
|
* This is especially useful when you need to modify properties of drawables
|
|
* loaded from resources. By default, all drawables instances loaded from
|
|
* the same resource share a common state; if you modify the state of one
|
|
* instance, all the other instances will receive the same modification.
|
|
*
|
|
* Calling this method on a mutable Drawable will have no effect.
|
|
*
|
|
* @return This drawable.
|
|
*/
|
|
public Drawable mutate() {
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an inputstream
|
|
*/
|
|
public static Drawable createFromStream(InputStream is, String srcName) {
|
|
return createFromResourceStream(null, null, is, srcName);
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an inputstream
|
|
*
|
|
* @hide pending API council approval
|
|
*/
|
|
public static Drawable createFromResourceStream(Resources res, TypedValue value,
|
|
InputStream is, String srcName) {
|
|
|
|
if (is == null) {
|
|
return null;
|
|
}
|
|
|
|
/* ugh. The decodeStream contract is that we have already allocated
|
|
the pad rect, but if the bitmap does not had a ninepatch chunk,
|
|
then the pad will be ignored. If we could change this to lazily
|
|
alloc/assign the rect, we could avoid the GC churn of making new
|
|
Rects only to drop them on the floor.
|
|
*/
|
|
Rect pad = new Rect();
|
|
Bitmap bm = BitmapFactory.decodeStream(res, value, is, pad, null);
|
|
if (bm != null) {
|
|
byte[] np = bm.getNinePatchChunk();
|
|
if (np == null || !NinePatch.isNinePatchChunk(np)) {
|
|
np = null;
|
|
pad = null;
|
|
}
|
|
return drawableFromBitmap(res, bm, np, pad, srcName);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Create a drawable from an XML document. For more information on how to
|
|
* create resources in XML, see
|
|
* <a href="{@docRoot}guide/topics/resources/resources-i18n.html">Resources and
|
|
* Internationalization</a>.
|
|
*/
|
|
public static Drawable createFromXml(Resources r, XmlPullParser parser)
|
|
throws XmlPullParserException, IOException {
|
|
AttributeSet attrs = Xml.asAttributeSet(parser);
|
|
|
|
int type;
|
|
while ((type=parser.next()) != XmlPullParser.START_TAG &&
|
|
type != XmlPullParser.END_DOCUMENT) {
|
|
// Empty loop
|
|
}
|
|
|
|
if (type != XmlPullParser.START_TAG) {
|
|
throw new XmlPullParserException("No start tag found");
|
|
}
|
|
|
|
Drawable drawable = createFromXmlInner(r, parser, attrs);
|
|
|
|
if (drawable == null) {
|
|
throw new RuntimeException("Unknown initial tag: " + parser.getName());
|
|
}
|
|
|
|
return drawable;
|
|
}
|
|
|
|
/**
|
|
* Create from inside an XML document. Called on a parser positioned at
|
|
* a tag in an XML document, tries to create a Drawable from that tag.
|
|
* Returns null if the tag is not a valid drawable.
|
|
*/
|
|
public static Drawable createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs)
|
|
throws XmlPullParserException, IOException {
|
|
Drawable drawable;
|
|
|
|
final String name = parser.getName();
|
|
|
|
if (name.equals("selector")) {
|
|
drawable = new StateListDrawable();
|
|
} else if (name.equals("level-list")) {
|
|
drawable = new LevelListDrawable();
|
|
} else if (name.equals("layer-list")) {
|
|
drawable = new LayerDrawable();
|
|
} else if (name.equals("transition")) {
|
|
drawable = new TransitionDrawable();
|
|
} else if (name.equals("color")) {
|
|
drawable = new ColorDrawable();
|
|
} else if (name.equals("shape")) {
|
|
drawable = new GradientDrawable();
|
|
} else if (name.equals("scale")) {
|
|
drawable = new ScaleDrawable();
|
|
} else if (name.equals("clip")) {
|
|
drawable = new ClipDrawable();
|
|
} else if (name.equals("rotate")) {
|
|
drawable = new RotateDrawable();
|
|
} else if (name.equals("animated-rotate")) {
|
|
drawable = new AnimatedRotateDrawable();
|
|
} else if (name.equals("animation-list")) {
|
|
drawable = new AnimationDrawable();
|
|
} else if (name.equals("inset")) {
|
|
drawable = new InsetDrawable();
|
|
} else if (name.equals("bitmap")) {
|
|
drawable = new BitmapDrawable();
|
|
if (r != null) {
|
|
((BitmapDrawable) drawable).setDensityScale(r.getDisplayMetrics());
|
|
}
|
|
} else if (name.equals("nine-patch")) {
|
|
drawable = new NinePatchDrawable();
|
|
} else {
|
|
throw new XmlPullParserException(parser.getPositionDescription() +
|
|
": invalid drawable tag " + name);
|
|
}
|
|
|
|
drawable.inflate(r, parser, attrs);
|
|
return drawable;
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a drawable from file path name.
|
|
*/
|
|
public static Drawable createFromPath(String pathName) {
|
|
if (pathName == null) {
|
|
return null;
|
|
}
|
|
|
|
Bitmap bm = BitmapFactory.decodeFile(pathName);
|
|
if (bm != null) {
|
|
return drawableFromBitmap(null, bm, null, null, pathName);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
|
|
throws XmlPullParserException, IOException {
|
|
|
|
TypedArray a = r.obtainAttributes(attrs, com.android.internal.R.styleable.Drawable);
|
|
inflateWithAttributes(r, parser, a, com.android.internal.R.styleable.Drawable_visible);
|
|
a.recycle();
|
|
}
|
|
|
|
void inflateWithAttributes(Resources r, XmlPullParser parser,
|
|
TypedArray attrs, int visibleAttr)
|
|
throws XmlPullParserException, IOException {
|
|
|
|
mVisible = attrs.getBoolean(visibleAttr, mVisible);
|
|
}
|
|
|
|
public static abstract class ConstantState {
|
|
public abstract Drawable newDrawable();
|
|
public abstract int getChangingConfigurations();
|
|
}
|
|
|
|
public ConstantState getConstantState() {
|
|
return null;
|
|
}
|
|
|
|
private static Drawable drawableFromBitmap(Resources res, Bitmap bm, byte[] np,
|
|
Rect pad, String srcName) {
|
|
|
|
if (np != null) {
|
|
return new NinePatchDrawable(bm, np, pad, srcName);
|
|
}
|
|
|
|
final BitmapDrawable drawable = new BitmapDrawable(bm);
|
|
if (res != null) {
|
|
drawable.setDensityScale(res.getDisplayMetrics());
|
|
}
|
|
|
|
return drawable;
|
|
}
|
|
}
|
|
|