BitmapUtil 很多有用的方法
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/** * * Copyright (c) 2014 CoderKiss * * CoderKiss[AT]gmail.com * */package com.kisstools.utils;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import android.annotation.TargetApi;import android.content.Context;import android.content.res.AssetManager;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.BitmapFactory;import android.graphics.BitmapFactory.Options;import android.graphics.BlurMaskFilter;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.drawable.Drawable;import android.graphics.drawable.GradientDrawable;import android.media.ExifInterface;import android.media.ThumbnailUtils;import android.os.Build;import android.os.Build.VERSION;import android.os.Build.VERSION_CODES;import android.provider.MediaStore.Images;import android.text.TextUtils;import android.view.Gravity;public class BitmapUtil { public static final String TAG = "BitmapUtil"; public static ImageSize getImageSize(String absPath) { if (TextUtils.isEmpty(absPath)) { return null; } Options options = getOptions(absPath); int width = options.outWidth; int height = options.outHeight; ImageSize size = new ImageSize(width, height); return size; } @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1) public static int getImageBytes(Bitmap bitmap) { if (bitmap == null) { return 0; } int bitmapSize = 0; if (VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB_MR1) { bitmapSize = bitmap.getByteCount(); } else { bitmapSize = bitmap.getRowBytes() * bitmap.getHeight(); } if (bitmapSize < 0) { bitmapSize = 0; } return bitmapSize; } public static Options getOptions(String absPath) { if (TextUtils.isEmpty(absPath)) { return null; } Options options = new Options(); options.inPreferredConfig = Config.ALPHA_8; options.inJustDecodeBounds = true; BitmapFactory.decodeFile(absPath, options); return options; } public static Options getOptions(String absPath, int desireWidth, int desireHeight) { if (!FileUtil.exists(absPath) || desireWidth <= 0 || desireHeight <= 0) { return null; } Options options = getOptions(absPath); int scaleW = sampleSize(options.outWidth, desireWidth); int scaleH = sampleSize(options.outHeight, desireWidth); options.inSampleSize = scaleH > scaleW ? scaleH : scaleW; options.inJustDecodeBounds = false; return options; } public static Bitmap getAssetBitmap(Context context, String filePath) { AssetManager assetManager = context.getAssets(); InputStream ips = null; Bitmap bitmap = null; try { ips = assetManager.open(filePath); bitmap = BitmapFactory.decodeStream(ips); } catch (IOException e) { e.printStackTrace(); } return bitmap; } public static Bitmap getImage(String absPath) { if (!FileUtil.exists(absPath)) { LogUtil.w(TAG, "invalid file path: " + absPath); return null; } LogUtil.d(TAG, "decode bitmap " + absPath); long enter = System.currentTimeMillis(); Bitmap bitmap = BitmapFactory.decodeFile(absPath); long delta = System.currentTimeMillis() - enter; LogUtil.v(TAG, "decode bitmap time " + delta); return bitmap; } public static Bitmap getImage(String absPath, ImageSize size) { if (TextUtils.isEmpty(absPath)) { return null; } if (ImageSize.valid(size)) { return getImage(absPath, size.getWidth(), size.getHeight()); } else { return getImage(absPath); } } public static Bitmap getImage(String absPath, int width, int height) { if (width <= 0 && height <= 0 || !FileUtil.exists(absPath)) { LogUtil.e(TAG, "invalid parameters absPath " + absPath + " width " + width + " height " + height); return null; } LogUtil.d(TAG, "decode bitmap " + absPath + " width " + width + " height " + height); long enter = System.currentTimeMillis(); Options options = getOptions(absPath, width, height); Bitmap bitmap = BitmapFactory.decodeFile(absPath, options); if (bitmap == null) { LogUtil.i(TAG, "decode bitmap failed " + absPath); return null; } int rotate = getRotate(absPath); bitmap = rotateImage(bitmap, rotate); System.gc(); long delta = System.currentTimeMillis() - enter; LogUtil.v(TAG, "decode bitmap time " + delta); return bitmap; } public static Bitmap rotateImage(Bitmap bitmap, int rotate) { if (bitmap == null) { return bitmap; } Matrix matrix = new Matrix(); matrix.setRotate(rotate); Bitmap rotated = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); if (rotated != null && !rotated.equals(bitmap)) { bitmap.recycle(); bitmap = rotated; } return bitmap; } public static boolean saveImage(Bitmap bitmap, String absPath) { return saveImage(bitmap, absPath, 100); } public static boolean saveImage(Bitmap bitmap, String absPath, int quality) { if (!FileUtil.create(absPath)) { LogUtil.w(TAG, "create file failed."); return false; } try { File outFile = new File(absPath); FileOutputStream fos = new FileOutputStream(outFile); BufferedOutputStream bos = new BufferedOutputStream(fos); bitmap.compress(Bitmap.CompressFormat.PNG, quality, bos); bos.flush(); bos.close(); } catch (IOException e) { e.printStackTrace(); LogUtil.e(TAG, "failed to write image content"); return false; } return true; } public static Bitmap squareImage(Bitmap bitmap) { if (bitmap == null) { return null; } int width = bitmap.getWidth(); int height = bitmap.getHeight(); if (width == height) { LogUtil.w(TAG, "no need to square image"); return bitmap; } int x = (height < width) ? ((width - height) / 2) : 0; int y = (width < height) ? ((height - width) / 2) : 0; int pixels = width < height ? width : height; Bitmap square = Bitmap.createBitmap(bitmap, x, y, pixels, pixels); return square; } public static int getRotate(String absPath) { if (!FileUtil.exists(absPath)) { LogUtil.w(TAG, "invalid file path"); return 0; } ExifInterface exifInterface = null; try { exifInterface = new ExifInterface(absPath); } catch (IOException e) { e.printStackTrace(); return 0; } int orientation = exifInterface.getAttributeInt( ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED); int rotate = 0; switch (orientation) { case ExifInterface.ORIENTATION_ROTATE_90: rotate = 90; break; case ExifInterface.ORIENTATION_ROTATE_180: rotate = 180; break; case ExifInterface.ORIENTATION_ROTATE_270: rotate = 270; break; default: break; } LogUtil.v(TAG, "image rotate " + rotate); return rotate; } public static Bitmap resizeImage(Bitmap bitmap, int desireWidth, int desireHeight, boolean isEnlarge) { if (bitmap == null || desireHeight <= 0 || desireWidth <= 0) { return null; } int width = bitmap.getWidth(); int height = bitmap.getHeight(); if (width <= 0 || height <= 0) { return bitmap; } if (!isEnlarge && (width < desireWidth && height < desireHeight)) { return bitmap; } float scale; if (width < height) { scale = (float) desireHeight / (float) height; if (desireWidth < width * scale) { scale = (float) desireWidth / (float) width; } } else { scale = (float) desireWidth / (float) width; } Matrix matrix = new Matrix(); matrix.postScale(scale, scale); bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); return bitmap; } public final static Bitmap getThumbnail(String absPath, int width, int height) { if (!FileUtil.exists(absPath) || width <= 0 || height <= 0) { return null; } Options options = getOptions(absPath, width, height); try { Bitmap bitmap = BitmapFactory.decodeFile(absPath, options); Bitmap result = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); // recycle(bitmap); return result; } catch (Exception e) { e.printStackTrace(); } catch (OutOfMemoryError e) { e.printStackTrace(); } return null; } public final static Bitmap getVideoThumbnail(String absPath, int width, int height) { if (!FileUtil.exists(absPath) || width <= 0 || height <= 0) { return null; } Bitmap bitmap = null; bitmap = ThumbnailUtils.createVideoThumbnail(absPath, Images.Thumbnails.MINI_KIND); LogUtil.d(TAG, "bitmap width " + bitmap.getWidth() + " height " + bitmap.getHeight()); bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT); return bitmap; } public final static Bitmap waterMark(Context context, Bitmap bitmap, int waterResId, int gravity) { Drawable waterPrintDrawable = context.getResources().getDrawable( waterResId); int waterPrintWidth = waterPrintDrawable.getIntrinsicWidth(); int waterPrintHeight = waterPrintDrawable.getIntrinsicHeight(); int w = bitmap.getWidth(); int h = bitmap.getHeight(); if (gravity == Gravity.CENTER) { waterPrintDrawable.setBounds((w - waterPrintWidth) / 2, (h - waterPrintHeight) / 2, (w + waterPrintWidth) / 2, (h + waterPrintHeight) / 2); } else { waterPrintDrawable.setBounds((w - waterPrintWidth) / 2, h, (w + waterPrintWidth) / 2, h + waterPrintHeight); } Canvas mCanvas = new Canvas(bitmap); waterPrintDrawable.draw(mCanvas); return bitmap; } public final static Bitmap toRounded(Context context, Bitmap bitmap, int color, int borderDips, int desireWidth) { try { Bitmap bitmap0 = squareImage(bitmap); Bitmap bitmap1 = resizeImage(bitmap0, desireWidth, desireWidth, true); int toPX = DeviceUtil.dp2px(borderDips); int maxBorder = (desireWidth / 2) / 5; maxBorder = maxBorder > 15 ? 15 : maxBorder; final int borderSizePx = toPX > maxBorder ? maxBorder : toPX; final int size = desireWidth; int center = (int) (size / 2); int left = (int) ((desireWidth - size) / 2); int top = (int) ((desireWidth - size) / 2); int right = left + size; int bottom = top + size; Bitmap output = Bitmap.createBitmap(size, size, Config.ARGB_8888); Canvas canvas = new Canvas(output); final Paint paint = new Paint(); final Rect src = new Rect(left, top, right, bottom); final Rect dst = new Rect(0, 0, size, size); canvas.drawARGB(0, 0, 0, 0); // draw border paint.setColor(Color.WHITE); paint.setAntiAlias(true); int radius = center - borderSizePx; canvas.drawCircle(center, center, radius, paint); // draw bitmap paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(bitmap1, src, dst, paint); paint.setXfermode(null); paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth((float) borderSizePx); radius = center - borderSizePx / 2; canvas.drawCircle(center, center, radius, paint); canvas.save(); recycle(bitmap0, bitmap1, bitmap); return output; } catch (Exception e) { e.printStackTrace(); } return bitmap; } public static Bitmap toRoundCorner(Context context, Bitmap bitmap) { try { int w = bitmap.getWidth(); int h = bitmap.getHeight(); final int delta = DeviceUtil.dp2px(5); final float roundPx = DeviceUtil.dp2px(14); final Paint paint = new Paint(); paint.setAntiAlias(true); /* draw round foreground */ int foreW = w - 2 * delta; int foreH = h - 2 * delta; Bitmap foreBmp = Bitmap .createBitmap(foreW, foreH, Config.ARGB_8888); Rect rect = new Rect(0, 0, foreW, foreH); RectF rectF = new RectF(rect); Canvas canvas0 = new Canvas(foreBmp); canvas0.drawRoundRect(rectF, roundPx, roundPx, paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas0.drawBitmap(bitmap, null, rect, paint); /* draw round background */ Drawable drawable = getDrawbale(0xffffffff, (int) (delta + roundPx)); drawable.setBounds(0, 0, w, h); Bitmap result = Bitmap.createBitmap(w, h, Config.ARGB_8888); Canvas canvas = new Canvas(result); drawable.draw(canvas); canvas.drawBitmap(foreBmp, delta, delta, null); recycle(foreBmp, bitmap); return result; } catch (Exception e) { e.printStackTrace(); return bitmap; } } public final static GradientDrawable getDrawbale(int argb, int radius) { GradientDrawable drawable = new GradientDrawable(); drawable.setCornerRadius(radius); drawable.setColor(argb); return drawable; } public final static Bitmap drawRing(Bitmap bitmap, int deltaRadius, int color) { int w = bitmap.getWidth(); int dia = deltaRadius * 2 + w; float radius = (float) dia / 2; Bitmap resultBitmap = Bitmap.createBitmap(dia, dia, Config.ARGB_8888); Paint paint = new Paint(); paint.setColor(color); paint.setAlpha(128); paint.setAntiAlias(true); Canvas canvas = new Canvas(resultBitmap); canvas.drawCircle(radius, radius, radius, paint); canvas.drawBitmap(bitmap, deltaRadius, deltaRadius, null); return resultBitmap; } public final static Bitmap getRound(int argb, int dia) { float radius = dia / 2; Bitmap resultBitmap = Bitmap.createBitmap(dia, dia, Config.ARGB_8888); Paint paint = new Paint(); paint.setColor(argb); paint.setAntiAlias(true); Canvas canvas = new Canvas(resultBitmap); canvas.drawCircle(radius, radius, radius, paint); return resultBitmap; } public final static Bitmap stretch(Bitmap bitmap, int height) { if (bitmap == null) { return null; } if (height <= bitmap.getHeight()) { return bitmap; } int w = bitmap.getWidth(); int h = bitmap.getHeight(); int tmpHeight = 1; Bitmap resultBitmap = Bitmap.createBitmap(w, height, Config.ARGB_8888); Canvas mCanvas = new Canvas(resultBitmap); mCanvas.drawBitmap(bitmap, 0, 0, null); Bitmap tmp = Bitmap .createBitmap(bitmap, 0, h - tmpHeight, w, tmpHeight); bitmap.recycle(); for (int index = 0; index < (height - h) / tmpHeight; index++) { mCanvas.drawBitmap(tmp, 0, h + index * tmpHeight, null); } tmp.recycle(); return resultBitmap; } public static Bitmap overlay(final Bitmap bitmap) { if (bitmap == null) { return null; } int width = bitmap.getWidth(); int height = bitmap.getHeight(); if (width == 0 || height == 0) { return null; } float rota = 345; double radians = Math.toRadians(rota); /* after rotate , the new width is the original width */ int rotateWidth = (int) (width / (Math.abs(Math.sin(radians)) + Math .abs(Math.cos(radians)))); int delta = (width - rotateWidth) / 2; // result Bitmap result = Bitmap.createBitmap(width, width, Config.ARGB_8888); Canvas canvas = new Canvas(result); // foreground Bitmap foreBmp = resizeImage(bitmap, rotateWidth, rotateWidth, true); // rotate Matrix matrix = new Matrix(); matrix.postRotate(rota); Bitmap rotate = Bitmap.createBitmap(foreBmp, 0, 0, rotateWidth, rotateWidth, matrix, true); canvas.drawBitmap(rotate, 0, 0, null); canvas.drawBitmap(foreBmp, delta, delta, null); recycle(bitmap, rotate, foreBmp); return result; } public static Bitmap drawLayoutDropShadow(Bitmap bitmap) { BlurMaskFilter blurFilter = new BlurMaskFilter(2, BlurMaskFilter.Blur.OUTER); Paint shadowPaint = new Paint(); shadowPaint.setMaskFilter(blurFilter); int[] offsetXY = { 5, 5 }; Bitmap shadowBitmap = bitmap.extractAlpha(shadowPaint, offsetXY); Bitmap shadowImage32 = shadowBitmap.copy(Bitmap.Config.ARGB_8888, true); Canvas c = new Canvas(shadowImage32); c.drawBitmap(bitmap, 0, 0, null); return shadowImage32; } public static Bitmap blur(Bitmap origin, int radius) { int iterations = 1; int width = origin.getWidth(); int height = origin.getHeight(); int[] inPixels = new int[width * height]; int[] outPixels = new int[width * height]; Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); origin.getPixels(inPixels, 0, width, 0, 0, width, height); for (int index = 0; index < iterations; index++) { blur(inPixels, outPixels, width, height, radius); blur(outPixels, inPixels, height, width, radius); } bitmap.setPixels(inPixels, 0, width, 0, 0, width, height); return bitmap; } private static void blur(int[] in, int[] out, int width, int height, int radius) { int widthMinus1 = width - 1; int tableSize = 2 * radius + 1; int divide[] = new int[256 * tableSize]; for (int index = 0; index < 256 * tableSize; index++) { divide[index] = index / tableSize; } int inIndex = 0; for (int y = 0; y < height; y++) { int outIndex = y; int ta = 0, tr = 0, tg = 0, tb = 0; for (int i = -radius; i <= radius; i++) { int rgb = in[inIndex + clamp(i, 0, width - 1)]; ta += (rgb >> 24) & 0xff; tr += (rgb >> 16) & 0xff; tg += (rgb >> 8) & 0xff; tb += rgb & 0xff; } for (int x = 0; x < width; x++) { out[outIndex] = (divide[ta] << 24) | (divide[tr] << 16) | (divide[tg] << 8) | divide[tb]; int i1 = x + radius + 1; if (i1 > widthMinus1) i1 = widthMinus1; int i2 = x - radius; if (i2 < 0) i2 = 0; int rgb1 = in[inIndex + i1]; int rgb2 = in[inIndex + i2]; ta += ((rgb1 >> 24) & 0xff) - ((rgb2 >> 24) & 0xff); tr += ((rgb1 & 0xff0000) - (rgb2 & 0xff0000)) >> 16; tg += ((rgb1 & 0xff00) - (rgb2 & 0xff00)) >> 8; tb += (rgb1 & 0xff) - (rgb2 & 0xff); outIndex += height; } inIndex += width; } } private static int clamp(int x, int a, int b) { return (x < a) ? a : (x > b) ? b : x; } private static int sampleSize(int size, int target) { int sample = 1; for (int index = 0; index < 10; index++) { if (size < target * 2) { break; } size = size / 2; sample = sample * 2; } return sample; } private final static void recycle(Bitmap... bitmaps) { if (bitmaps == null || bitmaps.length == 0) { return; } for (Bitmap bitmap : bitmaps) { if (bitmap == null) { continue; } if (!bitmap.isRecycled()) { bitmap.recycle(); continue; } bitmap = null; } System.gc(); }}
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