NinePatchDrawable.java revision 373954a1fd371a23c420aeeea9ccbc4d983733d7
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.graphics.drawable; 18 19import android.annotation.NonNull; 20import android.annotation.Nullable; 21import android.content.res.ColorStateList; 22import android.content.res.Resources; 23import android.content.res.Resources.Theme; 24import android.content.res.TypedArray; 25import android.graphics.Bitmap; 26import android.graphics.BitmapFactory; 27import android.graphics.Canvas; 28import android.graphics.ColorFilter; 29import android.graphics.Insets; 30import android.graphics.NinePatch; 31import android.graphics.Outline; 32import android.graphics.Paint; 33import android.graphics.PixelFormat; 34import android.graphics.PorterDuff; 35import android.graphics.PorterDuff.Mode; 36import android.graphics.PorterDuffColorFilter; 37import android.graphics.Rect; 38import android.graphics.Region; 39import android.util.AttributeSet; 40import android.util.DisplayMetrics; 41import android.util.LayoutDirection; 42import android.util.TypedValue; 43 44import com.android.internal.R; 45 46import org.xmlpull.v1.XmlPullParser; 47import org.xmlpull.v1.XmlPullParserException; 48 49import java.io.IOException; 50import java.io.InputStream; 51import java.util.Collection; 52 53/** 54 * 55 * A resizeable bitmap, with stretchable areas that you define. This type of image 56 * is defined in a .png file with a special format. 57 * 58 * <div class="special reference"> 59 * <h3>Developer Guides</h3> 60 * <p>For more information about how to use a NinePatchDrawable, read the 61 * <a href="{@docRoot}guide/topics/graphics/2d-graphics.html#nine-patch"> 62 * Canvas and Drawables</a> developer guide. For information about creating a NinePatch image 63 * file using the draw9patch tool, see the 64 * <a href="{@docRoot}guide/developing/tools/draw9patch.html">Draw 9-patch</a> tool guide.</p></div> 65 */ 66public class NinePatchDrawable extends Drawable { 67 // dithering helps a lot, and is pretty cheap, so default is true 68 private static final boolean DEFAULT_DITHER = false; 69 private NinePatchState mNinePatchState; 70 private NinePatch mNinePatch; 71 private PorterDuffColorFilter mTintFilter; 72 private Rect mPadding; 73 private Insets mOpticalInsets = Insets.NONE; 74 private Paint mPaint; 75 private boolean mMutated; 76 77 private int mTargetDensity = DisplayMetrics.DENSITY_DEFAULT; 78 79 // These are scaled to match the target density. 80 private int mBitmapWidth = -1; 81 private int mBitmapHeight = -1; 82 83 NinePatchDrawable() { 84 mNinePatchState = new NinePatchState(); 85 } 86 87 /** 88 * Create drawable from raw nine-patch data, not dealing with density. 89 * @deprecated Use {@link #NinePatchDrawable(Resources, Bitmap, byte[], Rect, String)} 90 * to ensure that the drawable has correctly set its target density. 91 */ 92 @Deprecated 93 public NinePatchDrawable(Bitmap bitmap, byte[] chunk, Rect padding, String srcName) { 94 this(new NinePatchState(new NinePatch(bitmap, chunk, srcName), padding), null); 95 } 96 97 /** 98 * Create drawable from raw nine-patch data, setting initial target density 99 * based on the display metrics of the resources. 100 */ 101 public NinePatchDrawable(Resources res, Bitmap bitmap, byte[] chunk, 102 Rect padding, String srcName) { 103 this(new NinePatchState(new NinePatch(bitmap, chunk, srcName), padding), res); 104 mNinePatchState.mTargetDensity = mTargetDensity; 105 } 106 107 /** 108 * Create drawable from raw nine-patch data, setting initial target density 109 * based on the display metrics of the resources. 110 * 111 * @hide 112 */ 113 public NinePatchDrawable(Resources res, Bitmap bitmap, byte[] chunk, 114 Rect padding, Rect opticalInsets, String srcName) { 115 this(new NinePatchState(new NinePatch(bitmap, chunk, srcName), padding, opticalInsets), 116 res); 117 mNinePatchState.mTargetDensity = mTargetDensity; 118 } 119 120 /** 121 * Create drawable from existing nine-patch, not dealing with density. 122 * @deprecated Use {@link #NinePatchDrawable(Resources, NinePatch)} 123 * to ensure that the drawable has correctly set its target density. 124 */ 125 @Deprecated 126 public NinePatchDrawable(NinePatch patch) { 127 this(new NinePatchState(patch, new Rect()), null); 128 } 129 130 /** 131 * Create drawable from existing nine-patch, setting initial target density 132 * based on the display metrics of the resources. 133 */ 134 public NinePatchDrawable(Resources res, NinePatch patch) { 135 this(new NinePatchState(patch, new Rect()), res); 136 mNinePatchState.mTargetDensity = mTargetDensity; 137 } 138 139 /** 140 * Set the density scale at which this drawable will be rendered. This 141 * method assumes the drawable will be rendered at the same density as the 142 * specified canvas. 143 * 144 * @param canvas The Canvas from which the density scale must be obtained. 145 * 146 * @see android.graphics.Bitmap#setDensity(int) 147 * @see android.graphics.Bitmap#getDensity() 148 */ 149 public void setTargetDensity(Canvas canvas) { 150 setTargetDensity(canvas.getDensity()); 151 } 152 153 /** 154 * Set the density scale at which this drawable will be rendered. 155 * 156 * @param metrics The DisplayMetrics indicating the density scale for this drawable. 157 * 158 * @see android.graphics.Bitmap#setDensity(int) 159 * @see android.graphics.Bitmap#getDensity() 160 */ 161 public void setTargetDensity(DisplayMetrics metrics) { 162 setTargetDensity(metrics.densityDpi); 163 } 164 165 /** 166 * Set the density at which this drawable will be rendered. 167 * 168 * @param density The density scale for this drawable. 169 * 170 * @see android.graphics.Bitmap#setDensity(int) 171 * @see android.graphics.Bitmap#getDensity() 172 */ 173 public void setTargetDensity(int density) { 174 if (density != mTargetDensity) { 175 mTargetDensity = density == 0 ? DisplayMetrics.DENSITY_DEFAULT : density; 176 if (mNinePatch != null) { 177 computeBitmapSize(); 178 } 179 invalidateSelf(); 180 } 181 } 182 183 private static Insets scaleFromDensity(Insets insets, int sdensity, int tdensity) { 184 int left = Bitmap.scaleFromDensity(insets.left, sdensity, tdensity); 185 int top = Bitmap.scaleFromDensity(insets.top, sdensity, tdensity); 186 int right = Bitmap.scaleFromDensity(insets.right, sdensity, tdensity); 187 int bottom = Bitmap.scaleFromDensity(insets.bottom, sdensity, tdensity); 188 return Insets.of(left, top, right, bottom); 189 } 190 191 private void computeBitmapSize() { 192 final int sdensity = mNinePatch.getDensity(); 193 final int tdensity = mTargetDensity; 194 if (sdensity == tdensity) { 195 mBitmapWidth = mNinePatch.getWidth(); 196 mBitmapHeight = mNinePatch.getHeight(); 197 mOpticalInsets = mNinePatchState.mOpticalInsets; 198 } else { 199 mBitmapWidth = Bitmap.scaleFromDensity(mNinePatch.getWidth(), sdensity, tdensity); 200 mBitmapHeight = Bitmap.scaleFromDensity(mNinePatch.getHeight(), sdensity, tdensity); 201 if (mNinePatchState.mPadding != null && mPadding != null) { 202 Rect dest = mPadding; 203 Rect src = mNinePatchState.mPadding; 204 if (dest == src) { 205 mPadding = dest = new Rect(src); 206 } 207 dest.left = Bitmap.scaleFromDensity(src.left, sdensity, tdensity); 208 dest.top = Bitmap.scaleFromDensity(src.top, sdensity, tdensity); 209 dest.right = Bitmap.scaleFromDensity(src.right, sdensity, tdensity); 210 dest.bottom = Bitmap.scaleFromDensity(src.bottom, sdensity, tdensity); 211 } 212 mOpticalInsets = scaleFromDensity(mNinePatchState.mOpticalInsets, sdensity, tdensity); 213 } 214 } 215 216 private void setNinePatch(NinePatch ninePatch) { 217 if (mNinePatch != ninePatch) { 218 mNinePatch = ninePatch; 219 if (ninePatch != null) { 220 computeBitmapSize(); 221 } else { 222 mBitmapWidth = mBitmapHeight = -1; 223 mOpticalInsets = Insets.NONE; 224 } 225 invalidateSelf(); 226 } 227 } 228 229 @Override 230 public void draw(Canvas canvas) { 231 final Rect bounds = getBounds(); 232 233 final boolean clearColorFilter; 234 if (mTintFilter != null && getPaint().getColorFilter() == null) { 235 mPaint.setColorFilter(mTintFilter); 236 clearColorFilter = true; 237 } else { 238 clearColorFilter = false; 239 } 240 241 final boolean needsMirroring = needsMirroring(); 242 if (needsMirroring) { 243 // Mirror the 9patch 244 canvas.translate(bounds.right - bounds.left, 0); 245 canvas.scale(-1.0f, 1.0f); 246 } 247 248 final int restoreAlpha; 249 if (mNinePatchState.mBaseAlpha != 1.0f) { 250 restoreAlpha = mPaint.getAlpha(); 251 mPaint.setAlpha((int) (restoreAlpha * mNinePatchState.mBaseAlpha + 0.5f)); 252 } else { 253 restoreAlpha = -1; 254 } 255 256 mNinePatch.draw(canvas, bounds, mPaint); 257 258 if (clearColorFilter) { 259 mPaint.setColorFilter(null); 260 } 261 262 if (restoreAlpha >= 0) { 263 mPaint.setAlpha(restoreAlpha); 264 } 265 } 266 267 @Override 268 public int getChangingConfigurations() { 269 return super.getChangingConfigurations() | mNinePatchState.getChangingConfigurations(); 270 } 271 272 @Override 273 public boolean getPadding(Rect padding) { 274 final Rect scaledPadding = mPadding; 275 if (scaledPadding != null) { 276 if (needsMirroring()) { 277 padding.set(scaledPadding.right, scaledPadding.top, 278 scaledPadding.left, scaledPadding.bottom); 279 } else { 280 padding.set(scaledPadding); 281 } 282 return (padding.left | padding.top | padding.right | padding.bottom) != 0; 283 } 284 return false; 285 } 286 287 @Override 288 public void getOutline(@NonNull Outline outline) { 289 final Rect bounds = getBounds(); 290 if (bounds.isEmpty()) return; 291 292 if (mNinePatchState != null) { 293 NinePatch.InsetStruct insets = mNinePatchState.mNinePatch.getBitmap().getNinePatchInsets(); 294 if (insets != null) { 295 final Rect outlineInsets = insets.outlineRect; 296 outline.setRoundRect(bounds.left + outlineInsets.left, 297 bounds.top + outlineInsets.top, 298 bounds.right - outlineInsets.right, 299 bounds.bottom - outlineInsets.bottom, 300 insets.outlineRadius); 301 outline.setAlpha(insets.outlineAlpha * (getAlpha() / 255.0f)); 302 return; 303 } 304 } 305 super.getOutline(outline); 306 } 307 308 /** 309 * @hide 310 */ 311 @Override 312 public Insets getOpticalInsets() { 313 if (needsMirroring()) { 314 return Insets.of(mOpticalInsets.right, mOpticalInsets.top, 315 mOpticalInsets.left, mOpticalInsets.bottom); 316 } else { 317 return mOpticalInsets; 318 } 319 } 320 321 @Override 322 public void setAlpha(int alpha) { 323 if (mPaint == null && alpha == 0xFF) { 324 // Fast common case -- leave at normal alpha. 325 return; 326 } 327 getPaint().setAlpha(alpha); 328 invalidateSelf(); 329 } 330 331 @Override 332 public int getAlpha() { 333 if (mPaint == null) { 334 // Fast common case -- normal alpha. 335 return 0xFF; 336 } 337 return getPaint().getAlpha(); 338 } 339 340 @Override 341 public void setColorFilter(ColorFilter colorFilter) { 342 if (mPaint == null && colorFilter == null) { 343 // Fast common case -- leave at no color filter. 344 return; 345 } 346 getPaint().setColorFilter(colorFilter); 347 invalidateSelf(); 348 } 349 350 @Override 351 public void setTintList(ColorStateList tint) { 352 mNinePatchState.mTint = tint; 353 mTintFilter = updateTintFilter(mTintFilter, tint, mNinePatchState.mTintMode); 354 invalidateSelf(); 355 } 356 357 @Override 358 public void setTintMode(PorterDuff.Mode tintMode) { 359 mNinePatchState.mTintMode = tintMode; 360 mTintFilter = updateTintFilter(mTintFilter, mNinePatchState.mTint, tintMode); 361 invalidateSelf(); 362 } 363 364 @Override 365 public void setDither(boolean dither) { 366 //noinspection PointlessBooleanExpression 367 if (mPaint == null && dither == DEFAULT_DITHER) { 368 // Fast common case -- leave at default dither. 369 return; 370 } 371 372 getPaint().setDither(dither); 373 invalidateSelf(); 374 } 375 376 @Override 377 public boolean isDither() { 378 return mPaint == null ? DEFAULT_DITHER : mPaint.isDither(); 379 } 380 381 @Override 382 public void setAutoMirrored(boolean mirrored) { 383 mNinePatchState.mAutoMirrored = mirrored; 384 } 385 386 private boolean needsMirroring() { 387 return isAutoMirrored() && getLayoutDirection() == LayoutDirection.RTL; 388 } 389 390 @Override 391 public boolean isAutoMirrored() { 392 return mNinePatchState.mAutoMirrored; 393 } 394 395 @Override 396 public void setFilterBitmap(boolean filter) { 397 getPaint().setFilterBitmap(filter); 398 invalidateSelf(); 399 } 400 401 @Override 402 public boolean isFilterBitmap() { 403 if (mPaint == null) { 404 return false; 405 } 406 return getPaint().isFilterBitmap(); 407 } 408 409 @Override 410 public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) 411 throws XmlPullParserException, IOException { 412 super.inflate(r, parser, attrs, theme); 413 414 final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.NinePatchDrawable); 415 updateStateFromTypedArray(a); 416 a.recycle(); 417 418 updateLocalState(r); 419 } 420 421 /** 422 * Updates the constant state from the values in the typed array. 423 */ 424 private void updateStateFromTypedArray(TypedArray a) throws XmlPullParserException { 425 final Resources r = a.getResources(); 426 final NinePatchState state = mNinePatchState; 427 428 // Account for any configuration changes. 429 state.mChangingConfigurations |= a.getChangingConfigurations(); 430 431 // Extract the theme attributes, if any. 432 state.mThemeAttrs = a.extractThemeAttrs(); 433 434 state.mDither = a.getBoolean(R.styleable.NinePatchDrawable_dither, state.mDither); 435 436 final int srcResId = a.getResourceId(R.styleable.NinePatchDrawable_src, 0); 437 if (srcResId != 0) { 438 final BitmapFactory.Options options = new BitmapFactory.Options(); 439 options.inDither = !state.mDither; 440 options.inScreenDensity = r.getDisplayMetrics().noncompatDensityDpi; 441 442 final Rect padding = new Rect(); 443 final Rect opticalInsets = new Rect(); 444 Bitmap bitmap = null; 445 446 try { 447 final TypedValue value = new TypedValue(); 448 final InputStream is = r.openRawResource(srcResId, value); 449 450 bitmap = BitmapFactory.decodeResourceStream(r, value, is, padding, options); 451 452 is.close(); 453 } catch (IOException e) { 454 // Ignore 455 } 456 457 if (bitmap == null) { 458 throw new XmlPullParserException(a.getPositionDescription() + 459 ": <nine-patch> requires a valid src attribute"); 460 } else if (bitmap.getNinePatchChunk() == null) { 461 throw new XmlPullParserException(a.getPositionDescription() + 462 ": <nine-patch> requires a valid 9-patch source image"); 463 } 464 465 bitmap.getOpticalInsets(opticalInsets); 466 467 state.mNinePatch = new NinePatch(bitmap, bitmap.getNinePatchChunk()); 468 state.mPadding = padding; 469 state.mOpticalInsets = Insets.of(opticalInsets); 470 } 471 472 state.mAutoMirrored = a.getBoolean( 473 R.styleable.NinePatchDrawable_autoMirrored, state.mAutoMirrored); 474 state.mBaseAlpha = a.getFloat(R.styleable.NinePatchDrawable_alpha, state.mBaseAlpha); 475 476 final int tintMode = a.getInt(R.styleable.NinePatchDrawable_tintMode, -1); 477 if (tintMode != -1) { 478 state.mTintMode = Drawable.parseTintMode(tintMode, Mode.SRC_IN); 479 } 480 481 final ColorStateList tint = a.getColorStateList(R.styleable.NinePatchDrawable_tint); 482 if (tint != null) { 483 state.mTint = tint; 484 } 485 486 final int densityDpi = r.getDisplayMetrics().densityDpi; 487 state.mTargetDensity = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi; 488 } 489 490 @Override 491 public void applyTheme(Theme t) { 492 super.applyTheme(t); 493 494 final NinePatchState state = mNinePatchState; 495 if (state == null) { 496 return; 497 } 498 499 if (state.mThemeAttrs != null) { 500 final TypedArray a = t.resolveAttributes( 501 state.mThemeAttrs, R.styleable.NinePatchDrawable); 502 try { 503 updateStateFromTypedArray(a); 504 } catch (XmlPullParserException e) { 505 throw new RuntimeException(e); 506 } finally { 507 a.recycle(); 508 } 509 } 510 511 if (state.mTint != null && state.mTint.canApplyTheme()) { 512 state.mTint = state.mTint.obtainForTheme(t); 513 } 514 515 updateLocalState(t.getResources()); 516 } 517 518 @Override 519 public boolean canApplyTheme() { 520 return mNinePatchState != null && mNinePatchState.canApplyTheme(); 521 } 522 523 public Paint getPaint() { 524 if (mPaint == null) { 525 mPaint = new Paint(); 526 mPaint.setDither(DEFAULT_DITHER); 527 } 528 return mPaint; 529 } 530 531 /** 532 * Retrieves the width of the source .png file (before resizing). 533 */ 534 @Override 535 public int getIntrinsicWidth() { 536 return mBitmapWidth; 537 } 538 539 /** 540 * Retrieves the height of the source .png file (before resizing). 541 */ 542 @Override 543 public int getIntrinsicHeight() { 544 return mBitmapHeight; 545 } 546 547 @Override 548 public int getMinimumWidth() { 549 return mBitmapWidth; 550 } 551 552 @Override 553 public int getMinimumHeight() { 554 return mBitmapHeight; 555 } 556 557 /** 558 * Returns a {@link android.graphics.PixelFormat graphics.PixelFormat} 559 * value of OPAQUE or TRANSLUCENT. 560 */ 561 @Override 562 public int getOpacity() { 563 return mNinePatch.hasAlpha() || (mPaint != null && mPaint.getAlpha() < 255) ? 564 PixelFormat.TRANSLUCENT : PixelFormat.OPAQUE; 565 } 566 567 @Override 568 public Region getTransparentRegion() { 569 return mNinePatch.getTransparentRegion(getBounds()); 570 } 571 572 @Override 573 public ConstantState getConstantState() { 574 mNinePatchState.mChangingConfigurations = getChangingConfigurations(); 575 return mNinePatchState; 576 } 577 578 @Override 579 public Drawable mutate() { 580 if (!mMutated && super.mutate() == this) { 581 mNinePatchState = new NinePatchState(mNinePatchState); 582 mNinePatch = mNinePatchState.mNinePatch; 583 mMutated = true; 584 } 585 return this; 586 } 587 588 /** 589 * @hide 590 */ 591 public void clearMutated() { 592 super.clearMutated(); 593 mMutated = false; 594 } 595 596 @Override 597 protected boolean onStateChange(int[] stateSet) { 598 final NinePatchState state = mNinePatchState; 599 if (state.mTint != null && state.mTintMode != null) { 600 mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode); 601 return true; 602 } 603 604 return false; 605 } 606 607 @Override 608 public boolean isStateful() { 609 final NinePatchState s = mNinePatchState; 610 return super.isStateful() || (s.mTint != null && s.mTint.isStateful()); 611 } 612 613 final static class NinePatchState extends ConstantState { 614 // Values loaded during inflation. 615 int[] mThemeAttrs = null; 616 NinePatch mNinePatch = null; 617 ColorStateList mTint = null; 618 Mode mTintMode = DEFAULT_TINT_MODE; 619 Rect mPadding = null; 620 Insets mOpticalInsets = Insets.NONE; 621 float mBaseAlpha = 1.0f; 622 boolean mDither = DEFAULT_DITHER; 623 int mTargetDensity = DisplayMetrics.DENSITY_DEFAULT; 624 boolean mAutoMirrored = false; 625 626 int mChangingConfigurations; 627 628 NinePatchState() { 629 // Empty constructor. 630 } 631 632 NinePatchState(@NonNull NinePatch ninePatch, @Nullable Rect padding) { 633 this(ninePatch, padding, null, DEFAULT_DITHER, false); 634 } 635 636 NinePatchState(@NonNull NinePatch ninePatch, @Nullable Rect padding, 637 @Nullable Rect opticalInsets) { 638 this(ninePatch, padding, opticalInsets, DEFAULT_DITHER, false); 639 } 640 641 NinePatchState(@NonNull NinePatch ninePatch, @Nullable Rect padding, 642 @Nullable Rect opticalInsets, boolean dither, boolean autoMirror) { 643 mNinePatch = ninePatch; 644 mPadding = padding; 645 mOpticalInsets = Insets.of(opticalInsets); 646 mDither = dither; 647 mAutoMirrored = autoMirror; 648 } 649 650 // Copy constructor 651 652 NinePatchState(@NonNull NinePatchState state) { 653 // We don't deep-copy any fields because they are all immutable. 654 mNinePatch = state.mNinePatch; 655 mTint = state.mTint; 656 mTintMode = state.mTintMode; 657 mThemeAttrs = state.mThemeAttrs; 658 mPadding = state.mPadding; 659 mOpticalInsets = state.mOpticalInsets; 660 mBaseAlpha = state.mBaseAlpha; 661 mDither = state.mDither; 662 mChangingConfigurations = state.mChangingConfigurations; 663 mTargetDensity = state.mTargetDensity; 664 mAutoMirrored = state.mAutoMirrored; 665 } 666 667 @Override 668 public boolean canApplyTheme() { 669 return mThemeAttrs != null 670 || (mTint != null && mTint.canApplyTheme()); 671 } 672 673 @Override 674 public int addAtlasableBitmaps(Collection<Bitmap> atlasList) { 675 final Bitmap bitmap = mNinePatch.getBitmap(); 676 if (isAtlasable(bitmap) && atlasList.add(bitmap)) { 677 return bitmap.getWidth() * bitmap.getHeight(); 678 } 679 return 0; 680 } 681 682 @Override 683 public Drawable newDrawable() { 684 return new NinePatchDrawable(this, null); 685 } 686 687 @Override 688 public Drawable newDrawable(Resources res) { 689 return new NinePatchDrawable(this, res); 690 } 691 692 @Override 693 public int getChangingConfigurations() { 694 return mChangingConfigurations 695 | (mTint != null ? mTint.getChangingConfigurations() : 0); 696 } 697 } 698 699 /** 700 * The one constructor to rule them all. This is called by all public 701 * constructors to set the state and initialize local properties. 702 */ 703 private NinePatchDrawable(NinePatchState state, Resources res) { 704 mNinePatchState = state; 705 706 updateLocalState(res); 707 708 // Push density applied by setNinePatchState into state. 709 mNinePatchState.mTargetDensity = mTargetDensity; 710 } 711 712 /** 713 * Initializes local dynamic properties from state. 714 */ 715 private void updateLocalState(Resources res) { 716 final NinePatchState state = mNinePatchState; 717 718 if (res != null) { 719 final int densityDpi = res.getDisplayMetrics().densityDpi; 720 mTargetDensity = densityDpi == 0 ? DisplayMetrics.DENSITY_DEFAULT : densityDpi; 721 } else { 722 mTargetDensity = state.mTargetDensity; 723 } 724 725 726 // If we can, avoid calling any methods that initialize Paint. 727 if (state.mDither != DEFAULT_DITHER) { 728 setDither(state.mDither); 729 } 730 731 // Make a local copy of the padding. 732 if (state.mPadding != null) { 733 mPadding = new Rect(state.mPadding); 734 } 735 736 mTintFilter = updateTintFilter(mTintFilter, state.mTint, state.mTintMode); 737 setNinePatch(state.mNinePatch); 738 } 739} 740