package com.jiang.android.architecture.utils;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.support.annotation.NonNull;
import android.util.Log;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import static com.jiang.android.architecture.utils.Preconditions.checkNotNull;
/**
* Created by jiang on 2016/11/18.
*/
public class LuBan {
private static final String TAG = "LuBan";
private static String DEFAULT_DISK_CACHE_DIR = "luban_disk_cache";
private final File mCacheDir;
public LuBan(Context context) {
mCacheDir = getPhotoCacheDir(context);
}
private static synchronized File getPhotoCacheDir(Context context) {
return getPhotoCacheDir(context, LuBan.DEFAULT_DISK_CACHE_DIR);
}
private static File getPhotoCacheDir(Context context, String cacheName) {
File cacheDir = context.getCacheDir();
if (cacheDir != null) {
File result = new File(cacheDir, cacheName);
if (!result.mkdirs() && (!result.exists() || !result.isDirectory())) {
// File wasn't able to create a directory, or the result exists but not a directory
return null;
}
File noMedia = new File(cacheDir + "/.nomedia");
if (!noMedia.mkdirs() && (!noMedia.exists() || !noMedia.isDirectory())) {
return null;
}
return result;
}
if (Log.isLoggable(TAG, Log.ERROR)) {
Log.e(TAG, "default disk cache dir is null");
}
return null;
}
private static synchronized File getPhotoCacheDir() {
return PathUtil.getInstance().getImagePath();
}
public int[] getImageSize(String imagePath) {
int[] res = new int[2];
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
options.inSampleSize = 1;
BitmapFactory.decodeFile(imagePath, options);
res[0] = options.outWidth;
res[1] = options.outHeight;
return res;
}
public File firstCompress(@NonNull File file) {
int minSize = 60;
int longSide = 720;
int shortSide = 1280;
String filePath = file.getAbsolutePath();
String thumbFilePath = mCacheDir.getAbsolutePath() + File.separator +
System.currentTimeMillis() + "_" + CommonUtils.getNumberRadim(4) + ".jpg";
long size = 0;
long maxSize = file.length() / 5;
int angle = getImageSpinAngle(filePath);
int[] imgSize = getImageSize(filePath);
int width = 0, height = 0;
if (imgSize[0] <= imgSize[1]) {
double scale = (double) imgSize[0] / (double) imgSize[1];
if (scale <= 1.0 && scale > 0.5625) {
width = imgSize[0] > shortSide ? shortSide : imgSize[0];
height = width * imgSize[1] / imgSize[0];
size = minSize;
} else if (scale <= 0.5625) {
height = imgSize[1] > longSide ? longSide : imgSize[1];
width = height * imgSize[0] / imgSize[1];
size = maxSize;
}
} else {
double scale = (double) imgSize[1] / (double) imgSize[0];
if (scale <= 1.0 && scale > 0.5625) {
height = imgSize[1] > shortSide ? shortSide : imgSize[1];
width = height * imgSize[0] / imgSize[1];
size = minSize;
} else if (scale <= 0.5625) {
width = imgSize[0] > longSide ? longSide : imgSize[0];
height = width * imgSize[1] / imgSize[0];
size = maxSize;
}
}
return compress(filePath, thumbFilePath, width, height, angle, size);
}
public File thirdCompress(@NonNull File file) {
String thumb = mCacheDir.getAbsolutePath() + File.separator +
System.currentTimeMillis() + "_" + CommonUtils.getNumberRadim(4) + ".jpg";
double size;
String filePath = file.getAbsolutePath();
int angle = getImageSpinAngle(filePath);
int width = getImageSize(filePath)[0];
int height = getImageSize(filePath)[1];
int thumbW = width % 2 == 1 ? width + 1 : width;
int thumbH = height % 2 == 1 ? height + 1 : height;
width = thumbW > thumbH ? thumbH : thumbW;
height = thumbW > thumbH ? thumbW : thumbH;
double scale = ((double) width / height);
if (scale <= 1 && scale > 0.5625) {
if (height < 1664) {
if (file.length() / 1024 < 150) return file;
size = (width * height) / Math.pow(1664, 2) * 150;
size = size < 60 ? 60 : size;
} else if (height >= 1664 && height < 4990) {
thumbW = width / 2;
thumbH = height / 2;
size = (thumbW * thumbH) / Math.pow(2495, 2) * 300;
size = size < 60 ? 60 : size;
} else if (height >= 4990 && height < 10240) {
thumbW = width / 4;
thumbH = height / 4;
size = (thumbW * thumbH) / Math.pow(2560, 2) * 300;
size = size < 100 ? 100 : size;
} else {
int multiple = height / 1280 == 0 ? 1 : height / 1280;
thumbW = width / multiple;
thumbH = height / multiple;
size = (thumbW * thumbH) / Math.pow(2560, 2) * 300;
size = size < 100 ? 100 : size;
}
} else if (scale <= 0.5625 && scale > 0.5) {
if (height < 1280 && file.length() / 1024 < 200) return file;
int multiple = height / 1280 == 0 ? 1 : height / 1280;
thumbW = width / multiple;
thumbH = height / multiple;
size = (thumbW * thumbH) / (1440.0 * 2560.0) * 400;
size = size < 100 ? 100 : size;
} else {
int multiple = (int) Math.ceil(height / (1280.0 / scale));
thumbW = width / multiple;
thumbH = height / multiple;
size = ((thumbW * thumbH) / (1280.0 * (1280 / scale))) * 500;
size = size < 100 ? 100 : size;
}
return compress(filePath, thumb, thumbW, thumbH, angle, (long) size);
}
private File compress(String largeImagePath, String thumbFilePath, int width, int height, int angle, long size) {
Bitmap thbBitmap = compress(largeImagePath, width, height);
thbBitmap = rotatingImage(angle, thbBitmap);
return saveImage(thumbFilePath, thbBitmap, size);
}
private Bitmap compress(String imagePath, int width, int height) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(imagePath, options);
int outH = options.outHeight;
int outW = options.outWidth;
int inSampleSize = 1;
if (outH > height || outW > width) {
int halfH = outH / 2;
int halfW = outW / 2;
while ((halfH / inSampleSize) > height && (halfW / inSampleSize) > width) {
inSampleSize *= 2;
}
}
options.inSampleSize = inSampleSize;
options.inJustDecodeBounds = false;
int heightRatio = (int) Math.ceil(options.outHeight / (float) height);
int widthRatio = (int) Math.ceil(options.outWidth / (float) width);
if (heightRatio > 1 || widthRatio > 1) {
if (heightRatio > widthRatio) {
options.inSampleSize = heightRatio;
} else {
options.inSampleSize = widthRatio;
}
}
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(imagePath, options);
}
private int getImageSpinAngle(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;
}
} catch (IOException e) {
e.printStackTrace();
}
return degree;
}
/**
* 旋转图片
* rotate the image with specified angle
*
* @param angle the angle will be rotating 旋转的角度
* @param bitmap target image 目标图片
*/
private static Bitmap rotatingImage(int angle, Bitmap bitmap) {
//rotate image
Matrix matrix = new Matrix();
matrix.postRotate(angle);
//create a new image
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
/**
* 保存图片到指定路径
* Save image with specified size
*
* @param filePath the image file save path 储存路径
* @param bitmap the image what be save 目标图片
* @param size the file size of image 期望大小
*/
private File saveImage(String filePath, Bitmap bitmap, long size) {
checkNotNull(bitmap, TAG + "bitmap cannot be null");
File result = new File(filePath.substring(0, filePath.lastIndexOf("/")));
if (!result.exists() && !result.mkdirs()) return null;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
int options = 100;
bitmap.compress(Bitmap.CompressFormat.JPEG, options, stream);
while (stream.toByteArray().length / 1024 > size && options > 6) {
stream.reset();
options -= 6;
bitmap.compress(Bitmap.CompressFormat.JPEG, options, stream);
}
bitmap.recycle();
try {
FileOutputStream fos = new FileOutputStream(filePath);
fos.write(stream.toByteArray());
fos.flush();
fos.close();
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
return new File(filePath);
}
}
