https:\/\/blog.51cto.com\/u_16213324\/8764082<\/a><\/p>\n<\/li>\n<\/ul>\n\/\/ \u5c06ByteArray\u8f6c\u6362\u4e3aBitmap\npublic Bitmap byteArrayToBitmap(byte[] byteArray) {\n return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);\n}\n\n\/\/ \u5c06Bitmap\u4fdd\u5b58\u4e3a\u672c\u5730\u56fe\u7247\u6587\u4ef6\npublic void saveBitmapToFile(Bitmap bitmap, String filePath) {\n File file = new File(filePath);\n FileOutputStream fos;\n try {\n fos = new FileOutputStream(file);\n bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);\n fos.flush();\n fos.close();\n } catch (IOException e) {\n e.printStackTrace();\n }\n}\n\n\/\/ \u793a\u4f8b\u7528\u6cd5\nbyte[] byteArray = \/\/ \u4ece\u670d\u52a1\u5668\u83b7\u53d6\u7684\u5b57\u8282\u6570\u7ec4\nBitmap bitmap = byteArrayToBitmap(byteArray);\nsaveBitmapToFile(bitmap, "\/sdcard\/image.jpg");<\/code><\/pre>\n\n- \u6307\u5b9a\u4e00\u4e2a\u8272\u503c\u751f\u6210bitmap<\/li>\n<\/ul>\n
public Bitmap getBackGroundBitmap(int color) {\n\n Paint p = new Paint();\n\n p.setColor(Color.RED);\n\n Bitmap bitmap = Bitmap.createBitmap(190, 110, Bitmap.Config.ARGB_8888);\n\n Canvas canvas = new Canvas(bitmap);\n\n canvas.drawColor(android.R.color.transparent);\n\n canvas.drawColor(color);\n\n return bitmap;\n\n }<\/code><\/pre>\n\n- \u8bbe\u7f6ebitmap\u7684\u900f\u660e\u5ea6<\/li>\n<\/ul>\n
public static Bitmap getAlplaBitmap(Bitmap sourceImg, int number) {\n\n \u3000\u3000int[] argb = new int[sourceImg.getWidth() * sourceImg.getHeight()];\n\n \u3000\u3000sourceImg.getPixels(argb, 0, sourceImg.getWidth(), 0, 0, sourceImg.getWidth(), sourceImg.getHeight());\n\n \u3000\u3000number = number * 255 \/ 100;\n\n \u3000\u3000for (int i = 0; i < argb.length; i++) {\n\n \u3000\u3000argb[i] = (number << 24) | (argb[i] & 0x00FFFFFF)\uff1b\n\n \u3000\u3000}\n\n \u3000\u3000sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(), sourceImg.getHeight(), Config.ARGB_8888);\n\n return sourceImg;\n\n\u3000\u3000 }<\/code><\/pre>\n\n- drawable\u8f6c\u6362\u6210bitmap<\/li>\n<\/ul>\n
\u3000\u3000 public static Bitmap drawableToBitmap(Drawable drawable) {\n\n \u3000\u3000 Bitmap bitmap = Bitmap.createBitmap(\n\n \u3000\u3000 drawable.getIntrinsicWidth(),\n\n \u3000\u3000 drawable.getIntrinsicHeight(),\n\n \u3000\u3000 drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);\n\n \u3000\u3000 Canvas canvas = new Canvas(bitmap);\n\n \u3000\u3000 drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());\n\n \u3000\u3000 drawable.draw(canvas);\n\n \u3000\u3000 return bitmap\uff1b\n\n\u3000\u3000 }<\/code><\/pre>\n\n- bitmap\u5706\u89d2<\/li>\n<\/ul>\n
\u3000\u3000public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {\n\n \u3000\u3000 Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),\n\n bitmap.getHeight(), Config.ARGB_8888);\n\n \u3000\u3000 Canvas canvas = new Canvas(output);\n\n \u3000\u3000 final int color = Color.RED; \n\n \u3000\u3000 final Paint paint = new Paint();\n\n \u3000\u3000 final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());\n\n \u3000\u3000 final RectF rectF = new RectF(rect);\n\n \u3000\u3000 final float roundPx = 6\uff1b\n\n \u3000\u3000paint.setAntiAlias(true);\n\n \u3000\u3000canvas.drawARGB(0, 0, 0, 0);\n\n \u3000\u3000paint.setColor(color);\n\n \u3000\u3000canvas.drawRoundRect(rectF, roundPx, roundPx, paint);\n\n \u3000\u3000paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));\n\n \u3000\u3000canvas.drawBitmap(bitmap, rect, rect, paint); \n\n \u3000\u3000 return output;\n\n\u3000\u3000 }<\/code><\/pre>\n