/**
* Create a drawable from an inputstream, using the given resources and value to determine density
* information.
*/
public static Drawable createFromResourceStream(
Resources res, TypedValue value, InputStream is, String srcName, BitmapFactory.Options opts) {
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();
// Special stuff for compatibility mode: if the target density is not
// the same as the display density, but the resource -is- the same as
// the display density, then don't scale it down to the target density.
// This allows us to load the system's density-correct resources into
// an application in compatibility mode, without scaling those down
// to the compatibility density only to have them scaled back up when
// drawn to the screen.
if (opts == null) opts = new BitmapFactory.Options();
opts.inScreenDensity =
res != null ? res.getDisplayMetrics().noncompatDensityDpi : DisplayMetrics.DENSITY_DEVICE;
Bitmap bm = BitmapFactory.decodeResourceStream(res, value, is, pad, opts);
if (bm != null) {
byte[] np = bm.getNinePatchChunk();
if (np == null || !NinePatch.isNinePatchChunk(np)) {
np = null;
pad = null;
}
final Rect opticalInsets = new Rect();
bm.getOpticalInsets(opticalInsets);
return drawableFromBitmap(res, bm, np, pad, opticalInsets, srcName);
}
return null;
}
/** Updates the constant state from the values in the typed array. */
private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException {
final Resources r = a.getResources();
final NinePatchState state = mNinePatchState;
// Account for any configuration changes.
state.mChangingConfigurations |= a.getChangingConfigurations();
// Extract the theme attributes, if any.
state.mThemeAttrs = a.extractThemeAttrs();
state.mDither = a.getBoolean(R.styleable.NinePatchDrawable_dither, state.mDither);
final int srcResId = a.getResourceId(R.styleable.NinePatchDrawable_src, 0);
if (srcResId != 0) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = !state.mDither;
options.inScreenDensity = r.getDisplayMetrics().noncompatDensityDpi;
final Rect padding = new Rect();
final Rect opticalInsets = new Rect();
Bitmap bitmap = null;
try {
final TypedValue value = new TypedValue();
final InputStream is = r.openRawResource(srcResId, value);
bitmap = BitmapFactory.decodeResourceStream(r, value, is, padding, options);
is.close();
} catch (IOException e) {
// Ignore
}
if (bitmap == null) {
throw new XmlPullParserException(
a.getPositionDescription() + ": <nine-patch> requires a valid src attribute");
} else if (bitmap.getNinePatchChunk() == null) {
throw new XmlPullParserException(
a.getPositionDescription() + ": <nine-patch> requires a valid 9-patch source image");
}
bitmap.getOpticalInsets(opticalInsets);
state.mNinePatch = new NinePatch(bitmap, bitmap.getNinePatchChunk());
state.mPadding = padding;
state.mOpticalInsets = Insets.of(opticalInsets);
}
state.mAutoMirrored =
a.getBoolean(R.styleable.NinePatchDrawable_autoMirrored, state.mAutoMirrored);
state.mBaseAlpha = a.getFloat(R.styleable.NinePatchDrawable_alpha, state.mBaseAlpha);
final int tintMode = a.getInt(R.styleable.NinePatchDrawable_tintMode, -1);
if (tintMode != -1) {
state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN);
}
final ColorStateList tint = a.getColorStateList(R.styleable.NinePatchDrawable_tint);
if (tint != null) {
state.mTint = tint;
}
// Update local properties.
initializeWithState(state, r);
// Push density applied by setNinePatchState into state.
state.mTargetDensity = mTargetDensity;
}