Java tutorial
/* * MIT License * * Copyright (c) 2016 Aldrin Clemente * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.truebanana.bitmap; import android.annotation.SuppressLint; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.graphics.Rect; import android.media.ExifInterface; import android.net.Uri; import android.os.Build; import android.provider.MediaStore; import android.renderscript.Allocation; import android.renderscript.Element; import android.renderscript.RenderScript; import android.renderscript.ScriptIntrinsicBlur; import com.truebanana.http.BitmapResponseListener; import com.truebanana.http.HTTPRequest; import com.truebanana.system.SystemUtils; import org.apache.commons.io.IOUtils; import java.io.ByteArrayInputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; /** * Includes {@link Bitmap}-related utility methods. */ public class BitmapUtils { // Bounds // ********************************************************************************************* public static BitmapFactory.Options getBounds(File file) { return getBounds(file, new BitmapFactory.Options()); } public static BitmapFactory.Options getBounds(File file, BitmapFactory.Options options) { options.inJustDecodeBounds = true; BitmapFactory.decodeFile(file.getPath(), options); return options; } public static BitmapFactory.Options getBounds(InputStream inputStream) { return getBounds(inputStream, new BitmapFactory.Options()); } public static BitmapFactory.Options getBounds(InputStream inputStream, BitmapFactory.Options options) { options.inJustDecodeBounds = true; BitmapFactory.decodeStream(inputStream, new Rect(), options); return options; } public static BitmapFactory.Options getBounds(byte[] bytes) { return getBounds(bytes, new BitmapFactory.Options()); } public static BitmapFactory.Options getBounds(byte[] bytes, BitmapFactory.Options options) { options.inJustDecodeBounds = true; BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options); return options; } // InSampleSize // ********************************************************************************************* public static int getInSampleSize(BitmapFactory.Options optionsWithBounds, int targetWidth, int targetHeight) { return getInSampleSize(optionsWithBounds.outWidth, optionsWithBounds.outHeight, targetWidth, targetHeight); } public static int getInSampleSize(int width, int height, int targetWidth, int targetHeight) { int inSampleSize = 1; if (width > targetWidth || height > targetHeight) { final int halfWidth = width / 2; final int halfHeight = height / 2; while ((halfWidth / inSampleSize) > targetWidth && (halfHeight / inSampleSize) > targetHeight) { inSampleSize *= 2; } } return inSampleSize; } // Decode File // ********************************************************************************************* public static Bitmap decodeFile(File file) { return decodeFile(file, 0, 0); } public static Bitmap decodeFile(File file, int targetWidth, int targetHeight) { if (targetWidth > 1 && targetHeight > 1) { BitmapFactory.Options options = getBounds(file); options.inJustDecodeBounds = false; options.inSampleSize = getInSampleSize(options, targetWidth, targetHeight); return BitmapFactory.decodeFile(file.getPath(), options); } else { return BitmapFactory.decodeFile(file.getPath()); } } public static DecodeFileTask decodeFileAsync(File file, int targetWidth, int targetHeight, DecodeFileListener listener) { DecodeFileTask task = new DecodeFileTask(file, targetWidth, targetHeight, listener); task.execute(); return task; } // Decode Stream // ********************************************************************************************* public static Bitmap decodeStream(InputStream inputStream) { return decodeStream(inputStream, 0, 0); } public static Bitmap decodeStream(InputStream inputStream, int targetWidth, int targetHeight) { try { byte[] bytes = IOUtils.toByteArray(inputStream); InputStream is1 = new ByteArrayInputStream(bytes); InputStream is2 = new ByteArrayInputStream(bytes); if (targetWidth > 1 && targetHeight > 1) { BitmapFactory.Options options = getBounds(is1); options.inJustDecodeBounds = false; options.inSampleSize = getInSampleSize(options, targetWidth, targetHeight); return BitmapFactory.decodeStream(is2, new Rect(), options); } else { return BitmapFactory.decodeStream(is2); } } catch (IOException e) { e.printStackTrace(); return null; } } // Decode Byte Array // ********************************************************************************************* public static Bitmap decodeBytes(byte[] bytes) { return decodeBytes(bytes, 0, 0); } public static Bitmap decodeBytes(byte[] bytes, int targetWidth, int targetHeight) { if (targetWidth > 1 && targetHeight > 1) { BitmapFactory.Options options = getBounds(bytes); options.inJustDecodeBounds = false; options.inSampleSize = getInSampleSize(options, targetWidth, targetHeight); return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options); } else { return BitmapFactory.decodeByteArray(bytes, 0, bytes.length); } } // Decode From URL // ********************************************************************************************* public static void decodeFromURL(String url, BitmapResponseListener listener) { HTTPRequest.create(url).setHTTPResponseListener(listener).executeAsync(); } // Cropping // ********************************************************************************************* public static Bitmap crop(Bitmap bitmap, int targetWidth, int targetHeight, int x, int y) { return Bitmap.createBitmap(bitmap, x, y, targetWidth, targetHeight); } // Orientation // ********************************************************************************************* public static Bitmap correctOrientation(Bitmap bitmap, int orientation) { Matrix matrix = new Matrix(); matrix.postRotate(orientation); return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); } public static int getOrientation(Context context, Uri bitmapUri) { Cursor cursor = context.getContentResolver().query(bitmapUri, new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null); if (cursor == null || cursor.getCount() != 1) { return -1; } cursor.moveToFirst(); return cursor.getInt(0); } public static int getOrientation(File file) { return getOrientation(file.getPath()); } public static int getOrientation(String path) { try { ExifInterface exif = new ExifInterface(path); return exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 0); } catch (IOException e) { e.printStackTrace(); } return 0; } // Blur // ********************************************************************************************* @SuppressLint("NewApi") public static Bitmap blur(Context context, Bitmap bitmap, float scale, int radius) { if (SystemUtils.getSDKVersion() >= Build.VERSION_CODES.JELLY_BEAN_MR1) { int width = Math.round(bitmap.getWidth() * scale); int height = Math.round(bitmap.getHeight() * scale); bitmap = Bitmap.createScaledBitmap(bitmap, width, height, false); Bitmap processedBitmap = Bitmap.createBitmap(bitmap); RenderScript rs = RenderScript.create(context); ScriptIntrinsicBlur sib = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); Allocation tmpIn = Allocation.createFromBitmap(rs, bitmap); Allocation tmpOut = Allocation.createFromBitmap(rs, processedBitmap); sib.setRadius(radius); sib.setInput(tmpIn); sib.forEach(tmpOut); tmpOut.copyTo(processedBitmap); return processedBitmap; } else { int width = Math.round(bitmap.getWidth() * scale); int height = Math.round(bitmap.getHeight() * scale); bitmap = Bitmap.createScaledBitmap(bitmap, width, height, false); Bitmap processedBitmap = bitmap.copy(bitmap.getConfig(), true); if (radius < 1) { return null; } int w = processedBitmap.getWidth(); int h = processedBitmap.getHeight(); int[] pix = new int[w * h]; processedBitmap.getPixels(pix, 0, w, 0, 0, w, h); int wm = w - 1; int hm = h - 1; int wh = w * h; int div = radius + radius + 1; int r[] = new int[wh]; int g[] = new int[wh]; int b[] = new int[wh]; int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; int vmin[] = new int[Math.max(w, h)]; int divsum = (div + 1) >> 1; divsum *= divsum; int dv[] = new int[256 * divsum]; for (i = 0; i < 256 * divsum; i++) { dv[i] = (i / divsum); } yw = yi = 0; int[][] stack = new int[div][3]; int stackpointer; int stackstart; int[] sir; int rbs; int r1 = radius + 1; int routsum, goutsum, boutsum; int rinsum, ginsum, binsum; for (y = 0; y < h; y++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; for (i = -radius; i <= radius; i++) { p = pix[yi + Math.min(wm, Math.max(i, 0))]; sir = stack[i + radius]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rbs = r1 - Math.abs(i); rsum += sir[0] * rbs; gsum += sir[1] * rbs; bsum += sir[2] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } } stackpointer = radius; for (x = 0; x < w; x++) { r[yi] = dv[rsum]; g[yi] = dv[gsum]; b[yi] = dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (y == 0) { vmin[x] = Math.min(x + radius + 1, wm); } p = pix[yw + vmin[x]]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[(stackpointer) % div]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi++; } yw += w; } for (x = 0; x < w; x++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; yp = -radius * w; for (i = -radius; i <= radius; i++) { yi = Math.max(0, yp) + x; sir = stack[i + radius]; sir[0] = r[yi]; sir[1] = g[yi]; sir[2] = b[yi]; rbs = r1 - Math.abs(i); rsum += r[yi] * rbs; gsum += g[yi] * rbs; bsum += b[yi] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } if (i < hm) { yp += w; } } yi = x; stackpointer = radius; for (y = 0; y < h; y++) { // Preserve alpha channel: ( 0xff000000 & pix[yi] ) pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (x == 0) { vmin[y] = Math.min(y + r1, hm) * w; } p = x + vmin[y]; sir[0] = r[p]; sir[1] = g[p]; sir[2] = b[p]; rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[stackpointer]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi += w; } } processedBitmap.setPixels(pix, 0, w, 0, 0, w, h); return processedBitmap; } } }