Android 图片处理工具类汇总
2015-11-11 14:27
441 查看
很有用的Android图片处理工具，实现各种图片处理效果
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 | /*******图片加载与保存*******/ /** * 以最省内存的方式读取本地资源的图片 * * @param context * @param resId * @return */ public Bitmap readBitMap(int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } /** * 节省内存 * * @Description: * @param filePath * @param outWidth * @param outHeight * @return */ public static Bitmap readBitmapAutoSize(String filePath, int outWidth, int outHeight) { // outWidth和outHeight是目标图片的最大宽度和高度，用作限制 FileInputStream fs = null; BufferedInputStream bs = null; try { fs = new FileInputStream(filePath); bs = new BufferedInputStream(fs); BitmapFactory.Options options = setBitmapOption(filePath, outWidth, outHeight); return BitmapFactory.decodeStream(bs, null, options); } catch (Exception e) { e.printStackTrace(); } finally { try { bs.close(); fs.close(); } catch (Exception e) { e.printStackTrace(); } } return null; } //保存图片到本地路径 public boolean saveBitmap(Bitmap bitmap, String fileName, String path) { File file = new File(path); FileOutputStream fos = null; if (!file.exists()) { file.mkdir(); } File imageFile = new File(file, fileName); try { imageFile.createNewFile(); fos = new FileOutputStream(imageFile); bitmap.compress(CompressFormat.JPEG, 50, fos); fos.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } fos = null; } } return true; } // 从view得到bitmap public Bitmap getViewBitmap(View view) { Bitmap bitmap = null; try { int width = view.getWidth(); int height = view.getHeight(); if (width != 0 && height != 0) { bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); } } catch (Exception e) { bitmap = null; Debug.out(e); } return bitmap; } /** * @Title: getLoacalBitmap * @Description: 加载本地图片 * @param @param url 本地路径 * @param @return * @return Bitmap * @throws */ public Bitmap getLoacalBitmap(String url) { if (url != null) { FileInputStream fis = null; try { fis = new FileInputStream(url); return BitmapFactory.decodeStream(fis); // /把流转化为Bitmap图片 } catch (FileNotFoundException e) { e.printStackTrace(); return null; } finally { StreamService.close(fis); if(fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } fis = null; } } } else { return null; } } /** * 通过URL地址获取Bitmap对象 * * @Title: getBitMapByUrl * @param @param url * @param @return * @param @throws Exception * @return Bitmap * @throws */ public Bitmap getBitMapByUrl(final String url) { URL fileUrl = null; InputStream is = null; Bitmap bitmap = null; try { fileUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) fileUrl.openConnection(); conn.setDoInput(true); conn.connect(); is = conn.getInputStream(); bitmap = BitmapFactory.decodeStream(is); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != is) { is.close(); } } catch (IOException e) { e.printStackTrace(); } is = null; } return bitmap; } /*******获取图片信息*******/ /** * @brief 从文件载入只获边框的，从返回的Options.outWidth和Options.outHight里取出即可 * @see android.graphics.BitmapFactory.Options#inJustDecodeBounds */ public Options loadJustDecodeBounds(String path) { Options opts = new Options(); opts.inJustDecodeBounds = true; loadFromFile(path, opts); return opts; } /** * @brief 读取图片方向信息 * @param path 图片路径 * @return 角度 */ public int readPhotoDegree(String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; default: degree = 0; } } catch (IOException e) { e.printStackTrace(); } return degree; } /*******图片转换*******/ public static Bitmap drawableToBitmap(Drawable drawable) { Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); //canvas.setBitmap(bitmap); drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap; } private byte[] Bitmap2Bytes(Bitmap bm) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } private Bitmap Bytes2Bimap(byte[] b) { if(b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } //Stream转换成Byte static byte[] streamToBytes(InputStream is) { ByteArrayOutputStream os = new ByteArrayOutputStream(1024); byte[] buffer = new byte[1024]; int len; try { while ((len = is.read(buffer)) >= 0) { os.write(buffer, 0, len); } } catch (java.io.IOException e) { } return os.toByteArray(); } /** Bitmap 格式转换 * * @param src * 需要重新编码的Bitmap * * @param format * 编码后的格式（目前只支持png和jpeg这两种格式） * * @param quality * 重新生成后的bitmap的质量 * * @return * 返回重新生成后的bitmap */ private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format, int quality) { ByteArrayOutputStream os = new ByteArrayOutputStream(); src.compress(format, quality, os); byte[] array = os.toByteArray(); return BitmapFactory.decodeByteArray(array, 0, array.length); } /*******图片缩放剪裁和形变*******/ /** * 放大缩小图片，不保证宽高比 * * @Title: zoomBitmap * @param @param bitmap * @param @param w * @param @param h * @return Bitmap * @throws */ public Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidht = ((float) w / width); float scaleHeight = ((float) h / height); matrix.postScale(scaleWidht, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); bitmap.recycle(); bitmap = null; return newbmp; } /** * @brief 缩放Bitmap * @param src 源Bitmap * @param dstWidth 目标宽度 * @param dstHeight 目标高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap scaleBitmap(Bitmap src, int dstWidth, int dstHeight, boolean isRecycle) { if (src.getWidth() == dstWidth && src.getHeight() == dstHeight) { return src; } Bitmap dst = Bitmap.createScaledBitmap(src, dstWidth, dstHeight, false); if (isRecycle && dst != src) { src.recycle(); } return dst; } //放大缩小图片，生成缩略图 public Bitmap extractThumbnail(Bitmap src, int width, int height) { return ThumbnailUtils.extractThumbnail(src, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); } /** * @brief 裁剪Bitmap * @param src 源Bitmap * @param x 开始x坐标 * @param y 开始y坐标 * @param width 截取宽度 * @param height 截取高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap cropBitmap(Bitmap src, int x, int y, int width, int height, boolean isRecycle) { if (x == 0 && y == 0 && width == src.getWidth() && height == src.getHeight()) { return src; } Bitmap dst = Bitmap.createBitmap(src, x, y, width, height); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*** * 图片分割 * * @param g * ：画布 * @param paint * ：画笔 * @param imgBit * ：图片 * @param x * ：X轴起点坐标 * @param y * ：Y轴起点坐标 * @param w * ：单一图片的宽度 * @param h * ：单一图片的高度 * @param line * ：第几列 * @param row * ：第几行 */ public final void cuteImage(Canvas g, Paint paint, Bitmap imgBit, int x, int y, int w, int h, int line, int row) { g.clipRect(x, y, x + w, h + y); g.drawBitmap(imgBit, x – line * w, y – row * h, paint); g.restore(); } //将一个图片切割成多个图片 //传入的参数是要切割的Bitmap对象，和横向和竖向的切割片数 public class ImageSplitter { public static List<ImagePiece> split(Bitmap bitmap, int xPiece, int yPiece) { List<ImagePiece> pieces = new ArrayList<ImagePiece>(xPiece * yPiece); int width = bitmap.getWidth(); int height = bitmap.getHeight(); int pieceWidth = width / 3; int pieceHeight = height / 3; for (int i = 0; i < yPiece; i++) { for (int j = 0; j < xPiece; j++) { ImagePiece piece = new ImagePiece(); piece.index = j + i * xPiece; int xValue = j * pieceWidth; int yValue = i * pieceHeight; piece.bitmap = Bitmap.createBitmap(bitmap, xValue, yValue, pieceWidth, pieceHeight); pieces.add(piece); } } return pieces; } } //图片翻转 Resources res = this.getContext().getResources(); img = BitmapFactory.decodeResource(res, R.drawable.slogo); Matrix matrix = new Matrix(); matrix.postRotate(90); /*翻转90度*/ int width = img.getWidth(); int height = img.getHeight(); r_img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true); /** * @brief 旋转Bitmap，顺时针 * @param src 源Bitmap * @param degree 旋转角度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap rotateBitmap(Bitmap src, int degree, boolean isRecycle) { if (degree % 360 == 0) { return src; } int w = src.getWidth(); int h = src.getHeight(); Matrix matrix = new Matrix(); matrix.postRotate(degree); Bitmap dst = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*******图片效果处理*******/ /** * 图片透明度处理 * * @param sourceImg * 原始图片 * @param number * 透明度 * @return */ public static Bitmap setAlpha(Bitmap sourceImg, int number) { int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()]; sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0, sourceImg.getWidth(), sourceImg.getHeight()); // 获得图片的ARGB值 number = number * 255 / 100; for (int i = 0; i < argb.length; i++) { argb = (number << 24) | (argb & 0×00FFFFFF);// 修改最高2位的值 } sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888); return sourceImg; } public class ImgService { //亮 public final float[] LIGHT_ARR = new float[] { 1, 0, 0, 0, 100, 0, 1, 0, 0, 100, 0, 0, 1, 0, 100, 0, 0, 0, 1, 0 }; //暗 public final float[] DARK_ARR = new float[] { 0.2f, 0, 0, 0, 50.8f, 0, 0.2f, 0, 0, 50.8f, 0, 0, 0.2f, 0, 50.8f, 0, 0, 0, 1f, 0 }; //高对比 public final float[] GDB_ARR = new float[] { 5, 0, 0, 0, -250, 0, 5, 0, 0, -250, 0, 0, 5, 0, -250, 0, 0, 0, 1, 0 }; //高对比 public final float[] DDB_ARR = new float[] { 0.2f, 0, 0, 0, 50, 0, 0.2f, 0, 0, 50, 0, 0, 0.2f, 0, 50, 0, 0, 0, 1, 0 }; //高饱和 public final float[] GBH_ARR = new float[] { 3f, -1.8f, -0.25f, 0, 50, -0.9f, 2.1f, -0.25f, 0, 50, -0.9f, -1.8f, 3.8f, 0, 50, 0, 0, 0, 1, 0 }; //低饱和 public final float[] DBH_ARR = new float[] { 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0, 0, 0, 1, 0 }; //COPY public final float[] COPY_ARR = new float[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; } /** * 为图片加滤镜特效.array参数为ImgService定义的几个滤镜矩阵.如ImgService.LIGHT_ARR * @param bmpOriginal * @param array * @return */ public Bitmap toGrayscale(Bitmap bmpOriginal, float[] array) { int width, height; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas c = new Canvas(bmpGrayscale); Paint paint = new Paint(); ColorMatrix colorMatrix = new ColorMatrix(); colorMatrix.set(array); paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix)); c.drawBitmap(bmpOriginal, 0, 0, paint); bmpOriginal.recycle(); bmpOriginal = null; return bmpGrayscale; } // Bitmap加水印 public Bitmap addWatermark(Bitmap src, Bitmap watermark) { if (src == null || watermark == null) { return src; } int sWid = src.getWidth(); int sHei = src.getHeight(); int wWid = watermark.getWidth(); int wHei = watermark.getHeight(); if (sWid == 0 || sHei == 0) { return null; } if (sWid < wWid || sHei < wHei) { return src; } Bitmap bitmap = Bitmap.createBitmap(sWid, sHei, Config.ARGB_8888);//Config可修改,改变内存占用 try { Canvas cv = new Canvas(bitmap); cv.drawBitmap(src, 0, 0, null); cv.drawBitmap(watermark, sWid - wWid - 5, sHei - wHei - 5, null); cv.save(Canvas.ALL_SAVE_FLAG); cv.restore(); } catch (Exception e) { bitmap = null; e.getStackTrace(); } finally { src.recycle(); src = null; watermark.recycle(); watermark = null; } return bitmap; } /** * 获得圆角图片 * * @Description: * @param bitmap * @param roundPx * @return */ public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, w, h); final RectF rectF = new RectF(rect); paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, 10, 10, paint);// 圆角平滑度为10 paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } /*** * 绘制带有边框的文字 * * @param strMsg * ：绘制内容 * @param g * ：画布 * @param paint * ：画笔 * @param setx * ：：X轴起始坐标 * @param sety * ：Y轴的起始坐标 * @param fg * ：前景色 * @param bg * ：背景色 */ public void drawText(String strMsg, Canvas g, Paint paint, int setx, int sety, int fg, int bg) { paint.setColor(bg); g.drawText(strMsg, setx + 1, sety, paint); g.drawText(strMsg, setx, sety – 1, paint); g.drawText(strMsg, setx, sety + 1, paint); g.drawText(strMsg, setx – 1, sety, paint); paint.setColor(fg); g.drawText(strMsg, setx, sety, paint); g.restore(); } //获得带倒影的图片方法 public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) { final int reflectionGap = 4; int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(1, -1); Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2, width, height / 2, matrix, false); Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888); Canvas canvas = new Canvas(bitmapWithReflection); canvas.drawBitmap(bitmap, 0, 0, null); Paint deafalutPaint = new Paint(); canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint); canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); // Set the Transfer mode to be porter duff and destination in paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); // Draw a rectangle using the paint with our linear gradient canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); return bitmapWithReflection; } //Android Matrix类实现镜像倒影方法 public void drawRegion(Image image_src, int x_src, int y_src, int width, int height, int transform, int x_dest, int y_dest, int anchor) { if((anchor & VCENTER) != 0) { y_dest -= height / 2; } else if((anchor & BOTTOM) != 0) { y_dest -= height; } if((anchor & RIGHT) != 0) { x_dest -= width; } else if((anchor & HCENTER) != 0) { x_dest -= width / 2; } Bitmap newMap = Bitmap.createBitmap(image_src.getBitmap(), x_src, y_src, width, height); Matrix mMatrix = new Matrix(); Matrix temp = new Matrix(); Matrix temp2 = new Matrix(); float[] mirrorY = { -1, 0, 0, 0, 1, 0, 0, 0, 1 }; temp.setValues(mirrorY); switch(transform) { case Sprite.TRANS_NONE: break; case Sprite.TRANS_ROT90: mMatrix.setRotate(90, width / 2, height / 2); break; case Sprite.TRANS_ROT180: mMatrix.setRotate(180, width / 2, height / 2); break; case Sprite.TRANS_ROT270: mMatrix.setRotate(270, width / 2, height / 2); break; case Sprite.TRANS_MIRROR: mMatrix.postConcat(temp); break; case Sprite.TRANS_MIRROR_ROT90: mMatrix.postConcat(temp); mMatrix.setRotate(90, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT180: mMatrix.postConcat(temp); mMatrix.setRotate(180, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT270: mMatrix.postConcat(temp); mMatrix.setRotate(270, width / 2, height / 2); break; } mMatrix.setTranslate(x_dest, y_dest); canvas.drawBitmap(newMap, mMatrix, mPaint); } /** * 将彩色图转换为灰度图 * @param img 位图 * @return 返回转换好的位图 */ public Bitmap convertGreyImg(Bitmap img) { int width = img.getWidth(); //获取位图的宽 int height = img.getHeight(); //获取位图的高 int []pixels = new int[width * height]; //通过位图的大小创建像素点数组 img.getPixels(pixels, 0, width, 0, 0, width, height); int alpha = 0xFF << 24; for(int i = 0; i < height; i++) { for(int j = 0; j < width; j++) { int grey = pixels[width * i + j]; int red = ((grey & 0x00FF0000 ) >> 16); int green = ((grey & 0x0000FF00) >> 8); int blue = (grey & 0x000000FF); grey = (int)((float) red * 0.3 + (float)green * 0.59 + (float)blue * 0.11); grey = alpha | (grey << 16) | (grey << 8) | grey; pixels[width * i + j] = grey; } } Bitmap result = Bitmap.createBitmap(width, height, Config.RGB_565); result.setPixels(pixels, 0, width, 0, 0, width, height); return result; } //压缩图片大小 public static Bitmap compressImage(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中 int options = 100; while ( baos.toByteArray().length / 1024 > 100) { //循环判断如果压缩后图片是否大于100kb,大于继续压缩 baos.reset();//重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中 options -= 10;//每次都减少10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中 Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片 return bitmap; } //同一张图片在两个不同的地方用到，但是两处的效果不一样。 //调用mutate()方法，可以使Drawable对象生成不同的constantstate对象，修改时就不会影响其它drawable对象的状态 //例如：通讯软件里不同用户，用同一个头像，一个要亮的，代表在线，一个要变灰，代表离线 Drawable mDrawable = context.getResources().getDrawable(R.drawable.face_icon); //Make this drawable mutable. //A mutable drawable is guaranteed to not share its state with any other drawable. mDrawable.mutate(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation(0); ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm); mDrawable.setColorFilter(cf); |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 | /*******图片加载与保存*******/ /** * 以最省内存的方式读取本地资源的图片 * * @param context * @param resId * @return */ public Bitmap readBitMap(int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } /** * 节省内存 * * @Description: * @param filePath * @param outWidth * @param outHeight * @return */ public static Bitmap readBitmapAutoSize(String filePath, int outWidth, int outHeight) { // outWidth和outHeight是目标图片的最大宽度和高度，用作限制 FileInputStream fs = null; BufferedInputStream bs = null; try { fs = new FileInputStream(filePath); bs = new BufferedInputStream(fs); BitmapFactory.Options options = setBitmapOption(filePath, outWidth, outHeight); return BitmapFactory.decodeStream(bs, null, options); } catch (Exception e) { e.printStackTrace(); } finally { try { bs.close(); fs.close(); } catch (Exception e) { e.printStackTrace(); } } return null; } //保存图片到本地路径 public boolean saveBitmap(Bitmap bitmap, String fileName, String path) { File file = new File(path); FileOutputStream fos = null; if (!file.exists()) { file.mkdir(); } File imageFile = new File(file, fileName); try { imageFile.createNewFile(); fos = new FileOutputStream(imageFile); bitmap.compress(CompressFormat.JPEG, 50, fos); fos.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } fos = null; } } return true; } // 从view得到bitmap public Bitmap getViewBitmap(View view) { Bitmap bitmap = null; try { int width = view.getWidth(); int height = view.getHeight(); if (width != 0 && height != 0) { bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); } } catch (Exception e) { bitmap = null; Debug.out(e); } return bitmap; } /** * @Title: getLoacalBitmap * @Description: 加载本地图片 * @param @param url 本地路径 * @param @return * @return Bitmap * @throws */ public Bitmap getLoacalBitmap(String url) { if (url != null) { FileInputStream fis = null; try { fis = new FileInputStream(url); return BitmapFactory.decodeStream(fis); // /把流转化为Bitmap图片 } catch (FileNotFoundException e) { e.printStackTrace(); return null; } finally { StreamService.close(fis); if(fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } fis = null; } } } else { return null; } } /** * 通过URL地址获取Bitmap对象 * * @Title: getBitMapByUrl * @param @param url * @param @return * @param @throws Exception * @return Bitmap * @throws */ public Bitmap getBitMapByUrl(final String url) { URL fileUrl = null; InputStream is = null; Bitmap bitmap = null; try { fileUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) fileUrl.openConnection(); conn.setDoInput(true); conn.connect(); is = conn.getInputStream(); bitmap = BitmapFactory.decodeStream(is); } catch (Exception e) { e.printStackTrace(); } finally { try { if (null != is) { is.close(); } } catch (IOException e) { e.printStackTrace(); } is = null; } return bitmap; } /*******获取图片信息*******/ /** * @brief 从文件载入只获边框的，从返回的Options.outWidth和Options.outHight里取出即可 * @see android.graphics.BitmapFactory.Options#inJustDecodeBounds */ public Options loadJustDecodeBounds(String path) { Options opts = new Options(); opts.inJustDecodeBounds = true; loadFromFile(path, opts); return opts; } /** * @brief 读取图片方向信息 * @param path 图片路径 * @return 角度 */ public int readPhotoDegree(String path) { int degree = 0; try { ExifInterface exifInterface = new ExifInterface(path); int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: degree = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: degree = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: degree = 270; break; default: degree = 0; } } catch (IOException e) { e.printStackTrace(); } return degree; } /*******图片转换*******/ public static Bitmap drawableToBitmap(Drawable drawable) { Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); //canvas.setBitmap(bitmap); drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap; } private byte[] Bitmap2Bytes(Bitmap bm) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } private Bitmap Bytes2Bimap(byte[] b) { if(b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } //Stream转换成Byte static byte[] streamToBytes(InputStream is) { ByteArrayOutputStream os = new ByteArrayOutputStream(1024); byte[] buffer = new byte[1024]; int len; try { while ((len = is.read(buffer)) >= 0) { os.write(buffer, 0, len); } } catch (java.io.IOException e) { } return os.toByteArray(); } /** Bitmap 格式转换 * * @param src * 需要重新编码的Bitmap * * @param format * 编码后的格式（目前只支持png和jpeg这两种格式） * * @param quality * 重新生成后的bitmap的质量 * * @return * 返回重新生成后的bitmap */ private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format, int quality) { ByteArrayOutputStream os = new ByteArrayOutputStream(); src.compress(format, quality, os); byte[] array = os.toByteArray(); return BitmapFactory.decodeByteArray(array, 0, array.length); } /*******图片缩放剪裁和形变*******/ /** * 放大缩小图片，不保证宽高比 * * @Title: zoomBitmap * @param @param bitmap * @param @param w * @param @param h * @return Bitmap * @throws */ public Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidht = ((float) w / width); float scaleHeight = ((float) h / height); matrix.postScale(scaleWidht, scaleHeight); Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); bitmap.recycle(); bitmap = null; return newbmp; } /** * @brief 缩放Bitmap * @param src 源Bitmap * @param dstWidth 目标宽度 * @param dstHeight 目标高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap scaleBitmap(Bitmap src, int dstWidth, int dstHeight, boolean isRecycle) { if (src.getWidth() == dstWidth && src.getHeight() == dstHeight) { return src; } Bitmap dst = Bitmap.createScaledBitmap(src, dstWidth, dstHeight, false); if (isRecycle && dst != src) { src.recycle(); } return dst; } //放大缩小图片，生成缩略图 public Bitmap extractThumbnail(Bitmap src, int width, int height) { return ThumbnailUtils.extractThumbnail(src, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); } /** * @brief 裁剪Bitmap * @param src 源Bitmap * @param x 开始x坐标 * @param y 开始y坐标 * @param width 截取宽度 * @param height 截取高度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap cropBitmap(Bitmap src, int x, int y, int width, int height, boolean isRecycle) { if (x == 0 && y == 0 && width == src.getWidth() && height == src.getHeight()) { return src; } Bitmap dst = Bitmap.createBitmap(src, x, y, width, height); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*** * 图片分割 * * @param g * ：画布 * @param paint * ：画笔 * @param imgBit * ：图片 * @param x * ：X轴起点坐标 * @param y * ：Y轴起点坐标 * @param w * ：单一图片的宽度 * @param h * ：单一图片的高度 * @param line * ：第几列 * @param row * ：第几行 */ public final void cuteImage(Canvas g, Paint paint, Bitmap imgBit, int x, int y, int w, int h, int line, int row) { g.clipRect(x, y, x + w, h + y); g.drawBitmap(imgBit, x – line * w, y – row * h, paint); g.restore(); } //将一个图片切割成多个图片 //传入的参数是要切割的Bitmap对象，和横向和竖向的切割片数 public class ImageSplitter { public static List<ImagePiece> split(Bitmap bitmap, int xPiece, int yPiece) { List<ImagePiece> pieces = new ArrayList<ImagePiece>(xPiece * yPiece); int width = bitmap.getWidth(); int height = bitmap.getHeight(); int pieceWidth = width / 3; int pieceHeight = height / 3; for (int i = 0; i < yPiece; i++) { for (int j = 0; j < xPiece; j++) { ImagePiece piece = new ImagePiece(); piece.index = j + i * xPiece; int xValue = j * pieceWidth; int yValue = i * pieceHeight; piece.bitmap = Bitmap.createBitmap(bitmap, xValue, yValue, pieceWidth, pieceHeight); pieces.add(piece); } } return pieces; } } //图片翻转 Resources res = this.getContext().getResources(); img = BitmapFactory.decodeResource(res, R.drawable.slogo); Matrix matrix = new Matrix(); matrix.postRotate(90); /*翻转90度*/ int width = img.getWidth(); int height = img.getHeight(); r_img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true); /** * @brief 旋转Bitmap，顺时针 * @param src 源Bitmap * @param degree 旋转角度 * @param isRecycle 是否回收原图像 * @return Bitmap */ public Bitmap rotateBitmap(Bitmap src, int degree, boolean isRecycle) { if (degree % 360 == 0) { return src; } int w = src.getWidth(); int h = src.getHeight(); Matrix matrix = new Matrix(); matrix.postRotate(degree); Bitmap dst = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true); if (isRecycle && dst != src) { src.recycle(); } return dst; } /*******图片效果处理*******/ /** * 图片透明度处理 * * @param sourceImg * 原始图片 * @param number * 透明度 * @return */ public static Bitmap setAlpha(Bitmap sourceImg, int number) { int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()]; sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0, sourceImg.getWidth(), sourceImg.getHeight()); // 获得图片的ARGB值 number = number * 255 / 100; for (int i = 0; i < argb.length; i++) { argb[i] = (number << 24) | (argb & 0×00FFFFFF);// 修改最高2[i]位的值 } sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888); return sourceImg; } public class ImgService { //亮 public final float[] LIGHT_ARR = new float[] { 1, 0, 0, 0, 100, 0, 1, 0, 0, 100, 0, 0, 1, 0, 100, 0, 0, 0, 1, 0 }; //暗 public final float[] DARK_ARR = new float[] { 0.2f, 0, 0, 0, 50.8f, 0, 0.2f, 0, 0, 50.8f, 0, 0, 0.2f, 0, 50.8f, 0, 0, 0, 1f, 0 }; //高对比 public final float[] GDB_ARR = new float[] { 5, 0, 0, 0, -250, 0, 5, 0, 0, -250, 0, 0, 5, 0, -250, 0, 0, 0, 1, 0 }; //高对比 public final float[] DDB_ARR = new float[] { 0.2f, 0, 0, 0, 50, 0, 0.2f, 0, 0, 50, 0, 0, 0.2f, 0, 50, 0, 0, 0, 1, 0 }; //高饱和 public final float[] GBH_ARR = new float[] { 3f, -1.8f, -0.25f, 0, 50, -0.9f, 2.1f, -0.25f, 0, 50, -0.9f, -1.8f, 3.8f, 0, 50, 0, 0, 0, 1, 0 }; //低饱和 public final float[] DBH_ARR = new float[] { 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0.3f, 0.6f, 0.08f, 0, 0, 0, 0, 0, 1, 0 }; //COPY public final float[] COPY_ARR = new float[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; } /** * 为图片加滤镜特效.array参数为ImgService定义的几个滤镜矩阵.如ImgService.LIGHT_ARR * @param bmpOriginal * @param array * @return */ public Bitmap toGrayscale(Bitmap bmpOriginal, float[] array) { int width, height; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas c = new Canvas(bmpGrayscale); Paint paint = new Paint(); ColorMatrix colorMatrix = new ColorMatrix(); colorMatrix.set(array); paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix)); c.drawBitmap(bmpOriginal, 0, 0, paint); bmpOriginal.recycle(); bmpOriginal = null; return bmpGrayscale; } // Bitmap加水印 public Bitmap addWatermark(Bitmap src, Bitmap watermark) { if (src == null || watermark == null) { return src; } int sWid = src.getWidth(); int sHei = src.getHeight(); int wWid = watermark.getWidth(); int wHei = watermark.getHeight(); if (sWid == 0 || sHei == 0) { return null; } if (sWid < wWid || sHei < wHei) { return src; } Bitmap bitmap = Bitmap.createBitmap(sWid, sHei, Config.ARGB_8888);//Config可修改,改变内存占用 try { Canvas cv = new Canvas(bitmap); cv.drawBitmap(src, 0, 0, null); cv.drawBitmap(watermark, sWid - wWid - 5, sHei - wHei - 5, null); cv.save(Canvas.ALL_SAVE_FLAG); cv.restore(); } catch (Exception e) { bitmap = null; e.getStackTrace(); } finally { src.recycle(); src = null; watermark.recycle(); watermark = null; } return bitmap; } /** * 获得圆角图片 * * @Description: * @param bitmap * @param roundPx * @return */ public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) { int w = bitmap.getWidth(); int h = bitmap.getHeight(); Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, w, h); final RectF rectF = new RectF(rect); paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, 10, 10, paint);// 圆角平滑度为10 paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } /*** * 绘制带有边框的文字 * * @param strMsg * ：绘制内容 * @param g * ：画布 * @param paint * ：画笔 * @param setx * ：：X轴起始坐标 * @param sety * ：Y轴的起始坐标 * @param fg * ：前景色 * @param bg * ：背景色 */ public void drawText(String strMsg, Canvas g, Paint paint, int setx, int sety, int fg, int bg) { paint.setColor(bg); g.drawText(strMsg, setx + 1, sety, paint); g.drawText(strMsg, setx, sety – 1, paint); g.drawText(strMsg, setx, sety + 1, paint); g.drawText(strMsg, setx – 1, sety, paint); paint.setColor(fg); g.drawText(strMsg, setx, sety, paint); g.restore(); } //获得带倒影的图片方法 public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) { final int reflectionGap = 4; int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(1, -1); Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2, width, height / 2, matrix, false); Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888); Canvas canvas = new Canvas(bitmapWithReflection); canvas.drawBitmap(bitmap, 0, 0, null); Paint deafalutPaint = new Paint(); canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint); canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); // Set the Transfer mode to be porter duff and destination in paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); // Draw a rectangle using the paint with our linear gradient canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); return bitmapWithReflection; } //Android Matrix类实现镜像倒影方法 public void drawRegion(Image image_src, int x_src, int y_src, int width, int height, int transform, int x_dest, int y_dest, int anchor) { if((anchor & VCENTER) != 0) { y_dest -= height / 2; } else if((anchor & BOTTOM) != 0) { y_dest -= height; } if((anchor & RIGHT) != 0) { x_dest -= width; } else if((anchor & HCENTER) != 0) { x_dest -= width / 2; } Bitmap newMap = Bitmap.createBitmap(image_src.getBitmap(), x_src, y_src, width, height); Matrix mMatrix = new Matrix(); Matrix temp = new Matrix(); Matrix temp2 = new Matrix(); float[] mirrorY = { -1, 0, 0, 0, 1, 0, 0, 0, 1 }; temp.setValues(mirrorY); switch(transform) { case Sprite.TRANS_NONE: break; case Sprite.TRANS_ROT90: mMatrix.setRotate(90, width / 2, height / 2); break; case Sprite.TRANS_ROT180: mMatrix.setRotate(180, width / 2, height / 2); break; case Sprite.TRANS_ROT270: mMatrix.setRotate(270, width / 2, height / 2); break; case Sprite.TRANS_MIRROR: mMatrix.postConcat(temp); break; case Sprite.TRANS_MIRROR_ROT90: mMatrix.postConcat(temp); mMatrix.setRotate(90, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT180: mMatrix.postConcat(temp); mMatrix.setRotate(180, width / 2, height / 2); break; case Sprite.TRANS_MIRROR_ROT270: mMatrix.postConcat(temp); mMatrix.setRotate(270, width / 2, height / 2); break; } mMatrix.setTranslate(x_dest, y_dest); canvas.drawBitmap(newMap, mMatrix, mPaint); } /** * 将彩色图转换为灰度图 * @param img 位图 * @return 返回转换好的位图 */ public Bitmap convertGreyImg(Bitmap img) { int width = img.getWidth(); //获取位图的宽 int height = img.getHeight(); //获取位图的高 int []pixels = new int[width * height]; //通过位图的大小创建像素点数组 img.getPixels(pixels, 0, width, 0, 0, width, height); int alpha = 0xFF << 24; for(int i = 0; i < height; i++) { for(int j = 0; j < width; j++) { int grey = pixels[width * i + j]; int red = ((grey & 0x00FF0000 ) >> 16); int green = ((grey & 0x0000FF00) >> 8); int blue = (grey & 0x000000FF); grey = (int)((float) red * 0.3 + (float)green * 0.59 + (float)blue * 0.11); grey = alpha | (grey << 16) | (grey << 8) | grey; pixels[width * i + j] = grey; } } Bitmap result = Bitmap.createBitmap(width, height, Config.RGB_565); result.setPixels(pixels, 0, width, 0, 0, width, height); return result; } //压缩图片大小 public static Bitmap compressImage(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中 int options = 100; while ( baos.toByteArray().length / 1024 > 100) { //循环判断如果压缩后图片是否大于100kb,大于继续压缩 baos.reset();//重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中 options -= 10;//每次都减少10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中 Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片 return bitmap; } //同一张图片在两个不同的地方用到，但是两处的效果不一样。 //调用mutate()方法，可以使Drawable对象生成不同的constantstate对象，修改时就不会影响其它drawable对象的状态 //例如：通讯软件里不同用户，用同一个头像，一个要亮的，代表在线，一个要变灰，代表离线 Drawable mDrawable = context.getResources().getDrawable(R.drawable.face_icon); //Make this drawable mutable. //A mutable drawable is guaranteed to not share its state with any other drawable. mDrawable.mutate(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation(0); ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm); mDrawable.setColorFilter(cf); |
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- Android中的SharedPreferences存储数据方式
- android adt bundle
- Android开发中退出程序几种方法
- android listview setEmptyview（设置listview是空值需要显示的布局）
- arcgis for android： file:/mnt/sdcard/xxx.geodatabase does not exist.
- Android底部菜单栏、Android沉浸式状态栏（顶部状态栏修改颜色）、自定义标题栏
- android jni的一些总结
- Android解析XML(SAX DOM PULL)
- Android 之ActivityThead、ActivityManagerService 与activity的管理和创建
- 整理android调用系统相机的方法及遇到的问题
- android context提供的openFileInput()方法
- Android项目工程目录详解
- Android用loadClass获取系统隐藏类和隐藏服务的方法
- NDK sprintf strcat 调用问题
- Android快速SDK（18）Tab页面TabPager【傻瓜模式】
- android edittext监听文字个数提示
- 学习笔记001之[Android开发视频教学].01_15_Handler的使用（二）
- android中dpi、density、dip的概念
- android listview自动向上翻滚
- Android ArrayAdapter的使用