你想要的这都有-ImageView/Bitmap图片处理的工具类

淩亂°似流年 2022-07-26 01:44 122阅读 0赞

# ImageView/Bitmap图片处理的工具类 #

## 直接上工具类代码,可以直接用: ##

/\*\*  
\* 对图片处理的工具类  
\*/  
@SuppressLint("NewApi")  
public class ImageUtil \{  
private WeakHashMap<Integer, WeakReference<Bitmap>> mBitmaps;  
private WeakHashMap<Integer, WeakReference<Drawable>> mDrawables;  
private Context mContext;  
// 下载图片，最大边长  
public static int MIN\_SIDE\_LENGTH = 256;  
// 是否重新计算压缩比  
public static boolean isComputeSampleSize = false;  
  
private static final long POLY64REV = 0x95AC9329AC4BC9B5L;  
private static final long INITIALCRC = 0xFFFFFFFFFFFFFFFFL;  
  
private static long\[\] sCrcTable = new long\[256\];  
  
public ImageUtil(Context context) \{  
mContext = context.getApplicationContext();  
mBitmaps = new WeakHashMap<Integer, WeakReference<Bitmap>>();  
mDrawables = new WeakHashMap<Integer, WeakReference<Drawable>>();  
\}

/\*\*  
\* 根据drawable id获取Bitmap  
\*  
\* @param resource  
\* @return  
\*/  
public Bitmap getBitmap(int resource) \{  
if (!mBitmaps.containsKey(resource) && mContext != null) \{  
mBitmaps.put(resource, new WeakReference<Bitmap>(  
readDrawableBitmap(mContext, resource)));  
\}  
return ((WeakReference<Bitmap>) mBitmaps.get(resource)).get();  
\}  
  
/\*\*  
\* 根据drawable id获取Drawable  
\*  
\* @param resource  
\* @return  
\*/  
public Drawable getDrawable(int resource) \{  
try \{  
if (!mDrawables.containsKey(resource) && mContext != null) \{  
try \{  
mDrawables.put(resource, new WeakReference<Drawable>(mContext  
.getResources().getDrawable(resource)));  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
\}  
\}  
return ((WeakReference<Drawable>) mDrawables.get(resource)).get();  
\} catch (Exception e) \{  
e.printStackTrace();  
\}  
return readBitmapResIdToDrawable(mContext, resource);  
\}  
  
/\*\*  
\*  
\* @param uri  
\* @param mcontext  
\* @return  
\*/  
public static Drawable bitmapToDrawble(Uri uri,Context mcontext)\{  
Drawable drawable = new BitmapDrawable(mcontext.getResources(), getBitmapFromUri(mcontext, uri));  
return drawable;  
\}  
  
@SuppressWarnings(\{ "unchecked", "rawtypes" \})  
public void recycleBitmaps() \{  
final Iterator itr = mBitmaps.entrySet().iterator();  
while (itr.hasNext()) \{  
Map.Entry e = (Map.Entry) itr.next();  
if (e != null) \{  
final Bitmap bitmap = ((WeakReference<Bitmap>) e.getValue()).get();  
if (bitmap != null) \{  
bitmap.recycle();  
\}  
\}  
\}  
mBitmaps.clear();  
\}  
  
public static Drawable readBitmapResIdToDrawable(Context context, int resId) \{  
final BitmapFactory.Options opt = new BitmapFactory.Options();  
opt.inPreferredConfig = Bitmap.Config.RGB\_565;  
opt.inPurgeable = true;  
opt.inInputShareable = true;  
// 获取资源图片  
final InputStream is = context.getResources().openRawResource(resId);  
final Bitmap btm = BitmapFactory.decodeStream(is, null, opt);  
if (btm != null) \{  
final BitmapDrawable bd = new BitmapDrawable(btm);  
try \{  
if (is != null) \{  
is.close();  
\}  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return bd;  
\}  
return null;  
\}  
  
/\*\*  
\* 以最省内存的方式读取本地资源的图片  
\*  
\* @param context  
\* @param resId  
\* @return  
\*/  
public static Bitmap readDrawableBitmap(Context context, int resId) \{  
final BitmapFactory.Options opt = new BitmapFactory.Options();  
opt.inPreferredConfig = Bitmap.Config.RGB\_565;  
opt.inPurgeable = true;  
opt.inInputShareable = true;  
// 获取资源图片  
final InputStream is = context.getResources().openRawResource(resId);  
final Bitmap bitmap = BitmapFactory.decodeStream(is, null, opt);  
  
try \{  
if (is != null) \{  
is.close();  
\}  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return bitmap;  
\}  
  
public static Bitmap readBitmap565FromFile(String filename) \{  
Bitmap bitmap = null;  
File file = new File(filename);  
if (file.exists()) \{  
final BitmapFactory.Options options = new BitmapFactory.Options();  
options.inPreferredConfig = Bitmap.Config.RGB\_565;  
options.inPurgeable = true;  
options.inInputShareable = true;  
try \{  
bitmap = BitmapFactory.decodeFile(filename, options);  
if (bitmap == null) \{  
file.delete();  
\}  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
  
if (bitmap != null && !bitmap.isRecycled()) \{  
bitmap.recycle();  
bitmap = null;  
\}  
System.gc();  
\}  
\}  
  
return bitmap;  
\}  
  
/\*\*  
\* 读取本地drawable中较大的资源图片  
\*  
\* @param context  
\* @param resId  
\* @return  
\*/  
public static Bitmap readDrawableBigBitmap(Context context, int resId) \{  
final InputStream is = context.getResources().openRawResource(resId);  
// final BitmapFactory.Options options=new BitmapFactory.Options();  
// options.inJustDecodeBounds = true;  
// // 如果该  
// 值设为true那么将不返回实际的bitmap，也不给其分配内存空间这样就避免内存溢出了。但是允许我们查询图片的信息这其中就包括图片大小信息（  
// // options.outHeight (图片原始高度)和option.outWidth(图片原始宽度)）。  
// BitmapFactory.decodeStream(is, null, options);  
// options.inSampleSize = computeSampleSize(options, -1, 256\*256);  
// options.inJustDecodeBounds = false;  
// return BitmapFactory.decodeStream(is, null, options);  
  
final Bitmap bitmap = getBitmapFromStream(is, 256, 256);  
try \{  
if (is != null) \{  
is.close();  
\}  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return bitmap;  
\}  
//从文件得到BitMap  
public static Bitmap getBitmapFromFile(String path, int width, int height) \{  
if (!TextUtils.isEmpty(path)) \{  
final File file = new File(path);  
return getBitmapFromFile(file, width, height);  
\}  
return null;  
\}  
//从文件得到BitMap  
public static Bitmap getBitmapFromFile(File dst, int width, int height) \{  
if (null != dst && dst.exists()) \{  
BitmapFactory.Options opts = null;  
if (width > 0 && height > 0) \{  
opts = new BitmapFactory.Options();  
opts.inJustDecodeBounds = true;  
BitmapFactory.decodeFile(dst.getPath(), opts);  
// 计算图片缩放比例  
final int minSideLength = Math.min(width, height);  
opts.inSampleSize = computeSampleSize(opts, minSideLength,  
width \* height);  
opts.inPreferredConfig = Bitmap.Config.RGB\_565;  
opts.inJustDecodeBounds = false;  
opts.inInputShareable = true;  
opts.inPurgeable = true;  
\}  
try \{  
return BitmapFactory.decodeFile(dst.getPath(), opts);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
System.gc();  
\}  
\}  
return null;  
\}  
  
public static Bitmap getBitmapByteArray(byte\[\] data, int width, int height) \{  
BitmapFactory.Options opts = null;  
if (width > 0 && height > 0) \{  
opts = new BitmapFactory.Options();  
opts.inJustDecodeBounds = true;  
BitmapFactory.decodeByteArray(data, 0, data.length, opts);  
// 计算图片缩放比例  
final int minSideLength = Math.min(width, height);  
opts.inSampleSize = computeSampleSize(opts, minSideLength, width  
\* height);  
opts.inJustDecodeBounds = false;  
opts.inInputShareable = true;  
// 使得内存可以被回收  
opts.inPurgeable = true;  
opts.inPreferredConfig = Bitmap.Config.RGB\_565;  
\}  
  
try \{  
return BitmapFactory.decodeByteArray(data, 0, data.length, opts);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
System.gc();  
\}  
return null;  
\}  
  
public static Bitmap getBitmapFromStream(InputStream is, int width,  
int height) \{  
BitmapFactory.Options opts = null;  
if (width > 0 && height > 0) \{  
opts = new BitmapFactory.Options();  
opts.inJustDecodeBounds = true;  
BitmapFactory.decodeStream(is, null, opts);  
// 计算图片缩放比例  
final int minSideLength = Math.min(width, height);  
opts.inSampleSize = computeSampleSize(opts, minSideLength, width  
\* height);  
opts.inJustDecodeBounds = false;  
opts.inInputShareable = true;  
// 使得内存可以被回收  
opts.inPurgeable = true;  
opts.inPreferredConfig = Bitmap.Config.RGB\_565;  
\}  
  
try \{  
return BitmapFactory.decodeStream(is, null, opts);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
System.gc();  
\}  
return null;  
\}  
  
  
  
private static int computeInitialSampleSize(BitmapFactory.Options options,  
int minSideLength, int maxNumOfPixels) \{  
  
final double w = options.outWidth;  
final double h = options.outHeight;  
  
final int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math  
.sqrt(w \* h / maxNumOfPixels));  
  
final int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(  
Math.floor(w / minSideLength), Math.floor(h / minSideLength));  
  
if (upperBound < lowerBound) \{  
// return the larger one when there is no overlapping zone.  
return lowerBound;  
\}  
  
if ((maxNumOfPixels == -1) && (minSideLength == -1)) \{  
return 1;  
\} else if (minSideLength == -1) \{  
return lowerBound;  
\} else \{  
return upperBound;  
\}  
\}  
  
/\*\*  
\* 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) \{  
try \{  
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++) \{  
if ((argb\[i\] & 0xff000000) != 0x00000000) \{// 透明色不做处理  
argb\[i\] = (number << 24) | (argb\[i\] & 0xFFFFFF);// 修改最高2位的值  
\}  
\}  
sourceImg = Bitmap.createBitmap(argb, sourceImg.getWidth(),  
sourceImg.getHeight(), Config.ARGB\_8888);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
System.gc();  
\}  
return sourceImg;  
\}  
  
public static Bitmap drawableToBitmap(Drawable drawable) \{  
  
Bitmap bitmap = null;  
try \{  
bitmap = Bitmap  
.createBitmap(  
drawable.getIntrinsicWidth(),  
drawable.getIntrinsicHeight(),  
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB\_8888  
: Bitmap.Config.RGB\_565);  
final Canvas canvas = new Canvas(bitmap);  
// canvas.setBitmap(bitmap);  
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),  
drawable.getIntrinsicHeight());  
drawable.draw(canvas);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
if (bitmap != null && !bitmap.isRecycled()) \{  
bitmap.recycle();  
bitmap = null;  
\}  
System.gc();  
\}  
  
return bitmap;  
\}  
  
/\*\*  
\* 获取源图片的BITMAP，压缩，本地图片  
\*  
\* @param sImagePath  
\* @return  
\*/  
public static Bitmap getImgCacheFromLocal2Bitmap(String sImagePath) \{  
if (!TextUtils.isEmpty(sImagePath)) \{  
Bitmap bitmap = null;  
try \{  
final File f = new File(sImagePath);  
if (!f.exists()) \{  
return null;  
\}  
final FileInputStream fis = new FileInputStream(f);  
// bitmap = BitmapFactory.decodeStream(fis);  
final BitmapFactory.Options options = new BitmapFactory.Options();  
options.inJustDecodeBounds = false;  
options.inSampleSize = 1; // width，hight设为原来的十分一  
options.inPreferredConfig = Bitmap.Config.RGB\_565;  
options.inPurgeable = true;  
options.inInputShareable = true;  
bitmap = BitmapFactory.decodeStream(fis, null, options);  
fis.close();  
return bitmap;  
\} catch (Exception ex) \{  
ex.printStackTrace();  
if (bitmap != null && !bitmap.isRecycled()) \{  
bitmap.recycle();  
bitmap = null;  
\}  
System.gc();  
return null;  
\} catch (OutOfMemoryError ex) \{  
ex.printStackTrace();  
if (bitmap != null && !bitmap.isRecycled()) \{  
bitmap.recycle();  
bitmap = null;  
\}  
System.gc();  
return null;  
\}  
\}  
return null;  
\}  
  
public static byte\[\] getImgCacheFromLocal2Byte(String sImagePath) \{  
if (!TextUtils.isEmpty(sImagePath)) \{  
try \{  
final File f = new File(sImagePath);  
if (!f.exists()) \{  
return null;  
\}  
final FileInputStream fis = new FileInputStream(f);  
final int length = fis.available();  
final byte\[\] buffer = new byte\[length\];  
fis.read(buffer);  
fis.close();  
return buffer;  
\} catch (Exception ex) \{  
ex.printStackTrace();  
System.gc();  
return null;  
\}  
\}  
return null;  
\}  
  
/\*\*  
\* bitmap转byte\[\]  
\*  
\* @param bitmap  
\* @return  
\*/  
public static byte\[\] getBitmap2Byte(Bitmap bitmap) \{  
if (bitmap != null) \{  
final ByteArrayOutputStream baos = new ByteArrayOutputStream();  
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);  
final byte\[\] data = baos.toByteArray();  
try \{  
baos.close();  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return data;  
\}  
return null;  
\}  
  
/\*\*  
\* 获取缩略图  
\*  
\* @param bitmap  
\* @param isThumbnail  
\* 是否转成缩略图  
\* @return  
\*/  
public static Bitmap decodeBitmapToThumbnail(Bitmap bitmap) \{  
return decodeBitmapToThumbnail(bitmap, true);  
\}  
  
public static Bitmap decodeBitmapToThumbnail(Bitmap bitmap,  
boolean isThumbnail) \{  
if (isThumbnail) \{  
final BitmapFactory.Options options = new BitmapFactory.Options();  
options.inJustDecodeBounds = true;  
  
final float realWidth = options.outWidth;  
final float realHeight = options.outHeight;  
  
// 计算缩放比  
int scale = (int) ((realHeight > realWidth ? realHeight : realWidth) / 100);  
if (scale <= 0) \{  
scale = 1;  
\}  
options.inSampleSize = scale;  
options.inJustDecodeBounds = false;  
// 注意这次要把options.inJustDecodeBounds 设为 false,这次图片是要读取出来的。  
final byte\[\] data = ImageUtil.getBitmap2Byte(bitmap);  
if (data != null) \{  
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,  
options);  
\}  
  
\}  
return bitmap;  
\}  
  
/\*\*  
\* 保存图片  
\*  
\* @param sOldImagePath  
\* @param sNewImagePath  
\* @return  
\*/  
public static boolean saveImage(Bitmap oldbitmap, String sNewImagePath) \{  
  
try \{  
final FileOutputStream fileout = new FileOutputStream(sNewImagePath);  
oldbitmap.compress(CompressFormat.JPEG, 80, fileout);  
fileout.flush();  
fileout.close();  
return true;  
\} catch (Exception e) \{  
e.printStackTrace();  
System.gc();  
return false;  
\}  
\}  
  
public static boolean saveImage(byte\[\] oldbitmap, String sNewImagePath) \{  
try \{  
File file = new File(sNewImagePath);  
if (file != null && !file.exists()) \{  
file.createNewFile();  
\}  
final FileOutputStream fileout = new FileOutputStream(sNewImagePath);  
fileout.write(oldbitmap);  
fileout.flush();  
fileout.close();  
return true;  
\} catch (Exception e) \{  
e.printStackTrace();  
System.gc();  
return false;  
\}  
\}  
  
public static Bitmap bytes2Bimap(byte\[\] b) \{  
if (b != null && b.length != 0) \{  
Bitmap bitmap = null;  
try \{  
bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);  
\} catch (OutOfMemoryError e) \{  
e.printStackTrace();  
\}  
return bitmap;  
\} else \{  
return null;  
\}  
\}  
  
/\*\*  
\* 光晕效果  
\*  
\* @param bmp  
\* @param x  
\* 光晕中心点在bmp中的x坐标  
\* @param y  
\* 光晕中心点在bmp中的y坐标  
\* @param r  
\* 光晕的半径  
\* @return  
\*/  
public static Bitmap grayMasking(Bitmap bmp, int x, int y, float r) \{  
// 高斯矩阵  
int\[\] gauss = new int\[\] \{ 1, 2, 1, 2, 4, 2, 1, 2, 1 \};  
  
int width = bmp.getWidth();  
int height = bmp.getHeight();  
Bitmap bitmap = Bitmap.createBitmap(width, height,  
Bitmap.Config.RGB\_565);  
  
int pixR = 0;  
int pixG = 0;  
int pixB = 0;  
  
int pixColor = 0;  
  
int newR = 0;  
int newG = 0;  
int newB = 0;  
  
int delta = 18; // 值越小图片会越亮，越大则越暗  
  
int idx = 0;  
int\[\] pixels = new int\[width \* height\];  
bmp.getPixels(pixels, 0, width, 0, 0, width, height);  
for (int i = 1, length = height - 1; i < length; i++) \{  
for (int k = 1, len = width - 1; k < len; k++) \{  
idx = 0;  
int distance = (int) (Math.pow(k - x, 2) + Math.pow(i - y, 2));  
// 不是中心区域的点做模糊处理  
if (distance > r \* r) \{  
for (int m = -1; m <= 1; m++) \{  
for (int n = -1; n <= 1; n++) \{  
pixColor = pixels\[(i + m) \* width + k + n\];  
pixR = Color.red(pixColor);  
pixG = Color.green(pixColor);  
pixB = Color.blue(pixColor);  
  
newR = newR + (int) (pixR \* gauss\[idx\]);  
newG = newG + (int) (pixG \* gauss\[idx\]);  
newB = newB + (int) (pixB \* gauss\[idx\]);  
idx++;  
\}  
\}  
  
newR /= delta;  
newG /= delta;  
newB /= delta;  
  
newR = Math.min(255, Math.max(0, newR));  
newG = Math.min(255, Math.max(0, newG));  
newB = Math.min(255, Math.max(0, newB));  
  
pixels\[i \* width + k\] = Color.argb(255, newR, newG, newB);  
  
newR = 0;  
newG = 0;  
newB = 0;  
\}  
\}  
\}  
  
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);  
return bitmap;  
\}  
  
/\*\*  
\* 获取bitmap的字节大小  
\* @param bitmap  
\* @return  
\*/  
public static int getBitmapSize(Bitmap bitmap) \{  
  
// if (Build.VERSION.SDK\_INT >= Build.VERSION\_CODES.KITKAT)\{ //API 19  
// return bitmap.getAllocationByteCount();  
// \}  
//  
if (Build.VERSION.SDK\_INT >= Build.VERSION\_CODES.HONEYCOMB\_MR1)\{//API 12  
return bitmap.getByteCount();  
\}  
return bitmap.getRowBytes() \* bitmap.getHeight(); //earlier version  
\}  
  
public static byte\[\] getBytes(String in) \{  
byte\[\] result = new byte\[in.length() \* 2\];  
int output = 0;  
for (char ch : in.toCharArray()) \{  
result\[output++\] = (byte) (ch & 0xFF);  
result\[output++\] = (byte) (ch >> 8);  
\}  
return result;  
\}  
  
public static boolean isSameKey(byte\[\] key, byte\[\] buffer) \{  
int n = key.length;  
if (buffer.length < n) \{  
return false;  
\}  
for (int i = 0; i < n; ++i) \{  
if (key\[i\] != buffer\[i\]) \{  
return false;  
\}  
\}  
return true;  
\}  
  
public static byte\[\] copyOfRange(byte\[\] original, int from, int to) \{  
int newLength = to - from;  
if (newLength < 0)  
throw new IllegalArgumentException(from + " > " + to);  
byte\[\] copy = new byte\[newLength\];  
System.arraycopy(original, from, copy, 0,Math.min(original.length - from, newLength));  
return copy;  
\}  
  
  
  
static \{  
//参考 http://bioinf.cs.ucl.ac.uk/downloads/crc64/crc64.c  
long part;  
for (int i = 0; i < 256; i++) \{  
part = i;  
for (int j = 0; j < 8; j++) \{  
long x = ((int) part & 1) != 0 ? POLY64REV : 0;  
part = (part >> 1) ^ x;  
\}  
sCrcTable\[i\] = part;  
\}  
\}  
  
public static byte\[\] makeKey(String httpUrl) \{  
return getBytes(httpUrl);  
\}  
  
/\*\*  
\* A function thats returns a 64-bit crc for string  
\*  
\* @param in input string  
\* @return a 64-bit crc value  
\*/  
public static final long crc64Long(String in) \{  
if (in == null || in.length() == 0) \{  
return 0;  
\}  
return crc64Long(getBytes(in));  
\}  
  
public static final long crc64Long(byte\[\] buffer) \{  
long crc = INITIALCRC;  
for (int k = 0, n = buffer.length; k < n; ++k) \{  
crc = sCrcTable\[(((int) crc) ^ buffer\[k\]) & 0xff\] ^ (crc >> 8);  
\}  
return crc;  
\}  
  
/\*\*  
\* 将彩色图转换为黑白图  
\*  
\* @return 返回转换好的位图  
\*/  
public static Bitmap convertToBlackWhite(Bitmap bmp) \{  
int width = bmp.getWidth(); // 获取位图的宽  
int height = bmp.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  
  
bmp.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) (red \* 0.3 + green \* 0.59 + blue \* 0.11);  
grey = alpha | (grey << 16) | (grey << 8) | grey;  
pixels\[width \* i + j\] = grey;  
\}  
\}  
Bitmap newBmp = Bitmap.createBitmap(width, height, Config.RGB\_565);  
newBmp.setPixels(pixels, 0, width, 0, 0, width, height);  
return newBmp;  
\}  
  
/\*\*  
\* 转换成圆角  
\*  
\* @param bmp  
\* @param roundPx  
\* @return  
\*/  
public static Bitmap convertToRoundedCorner(Bitmap bmp, float roundPx) \{  
Bitmap newBmp = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(),  
Config.ARGB\_8888);  
// 得到画布  
Canvas canvas = new Canvas(newBmp);  
  
final int color = 0xff424242;  
final Paint paint = new Paint();  
final Rect rect = new Rect(0, 0, bmp.getWidth(), bmp.getHeight());  
final RectF rectF = new RectF(rect);  
  
paint.setAntiAlias(true);  
canvas.drawARGB(0, 0, 0, 0);  
paint.setColor(color);  
// 第二个和第三个参数一样则画的是正圆的一角，否则是椭圆的一角  
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  
  
paint.setXfermode(new PorterDuffXfermode(Mode.SRC\_IN));  
canvas.drawBitmap(bmp, rect, rect, paint);  
  
return newBmp;  
\}  
  
/\*\* 水平方向模糊度 \*/  
private static float hRadius = 2;  
/\*\* 竖直方向模糊度 \*/  
private static float vRadius = 2;  
/\*\* 模糊迭代度 \*/  
private static int iterations = 7;  
/\*\*  
\* 高斯模糊  
\*/  
public static Bitmap BoxBlurFilter(Bitmap bmp) \{  
long start = System.currentTimeMillis();  
  
int width = bmp.getWidth();  
int height = bmp.getHeight();  
int\[\] inPixels = new int\[width \* height\];  
int\[\] outPixels = new int\[width \* height\];  
Bitmap bitmap = Bitmap.createBitmap(width, height,Bitmap.Config.ARGB\_8888);  
bmp.getPixels(inPixels, 0, width, 0, 0, width, height);  
for (int i = 0; i < iterations; i++) \{  
blur(inPixels, outPixels, width, height, hRadius);  
blur(outPixels, inPixels, height, width, vRadius);  
\}  
blurFractional(inPixels, outPixels, width, height, hRadius);  
blurFractional(outPixels, inPixels, height, width, vRadius);  
bitmap.setPixels(inPixels, 0, width, 0, 0, width, height);  
  
long end = System.currentTimeMillis();  
  
return bitmap;  
\}  
  
public static void blur(int\[\] in, int\[\] out, int width, int height,  
float radius) \{  
int widthMinus1 = width - 1;  
int r = (int) radius;  
int tableSize = 2 \* r + 1;  
int divide\[\] = new int\[256 \* tableSize\];  
  
for (int i = 0; i < 256 \* tableSize; i++)  
divide\[i\] = i / 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 = -r; i <= r; 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 + r + 1;  
if (i1 > widthMinus1)  
i1 = widthMinus1;  
int i2 = x - r;  
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 void blurFractional(int\[\] in, int\[\] out, int width,  
int height, float radius) \{  
radius -= (int) radius;  
float f = 1.0f / (1 + 2 \* radius);  
int inIndex = 0;  
  
for (int y = 0; y < height; y++) \{  
int outIndex = y;  
  
out\[outIndex\] = in\[0\];  
outIndex += height;  
for (int x = 1; x < width - 1; x++) \{  
int i = inIndex + x;  
int rgb1 = in\[i - 1\];  
int rgb2 = in\[i\];  
int rgb3 = in\[i + 1\];  
  
int a1 = (rgb1 >> 24) & 0xff;  
int r1 = (rgb1 >> 16) & 0xff;  
int g1 = (rgb1 >> 8) & 0xff;  
int b1 = rgb1 & 0xff;  
int a2 = (rgb2 >> 24) & 0xff;  
int r2 = (rgb2 >> 16) & 0xff;  
int g2 = (rgb2 >> 8) & 0xff;  
int b2 = rgb2 & 0xff;  
int a3 = (rgb3 >> 24) & 0xff;  
int r3 = (rgb3 >> 16) & 0xff;  
int g3 = (rgb3 >> 8) & 0xff;  
int b3 = rgb3 & 0xff;  
a1 = a2 + (int) ((a1 + a3) \* radius);  
r1 = r2 + (int) ((r1 + r3) \* radius);  
g1 = g2 + (int) ((g1 + g3) \* radius);  
b1 = b2 + (int) ((b1 + b3) \* radius);  
a1 \*= f;  
r1 \*= f;  
g1 \*= f;  
b1 \*= f;  
out\[outIndex\] = (a1 << 24) | (r1 << 16) | (g1 << 8) | b1;  
outIndex += height;  
\}  
out\[outIndex\] = in\[width - 1\];  
inIndex += width;  
\}  
\}  
  
public static int clamp(int x, int a, int b) \{  
return (x < a) ? a : (x > b) ? b : x;  
\}  
  
/\*\*  
\* 圆形图片  
\*  
\* @param bitmap  
\* @return  
\*/  
public static Bitmap getCircleBitmap(Bitmap bitmap)\{  
int width = bitmap.getWidth();  
int height = bitmap.getHeight();  
float roundPx;  
float left, top, right, bottom, dst\_left, dst\_top, dst\_right, dst\_bottom;  
if (width <= height) \{  
roundPx = width / 2;  
top = 0;  
bottom = width;  
left = 0;  
right = width;  
height = width;  
dst\_left = 0;  
dst\_top = 0;  
dst\_right = width;  
dst\_bottom = width;  
\} else \{  
roundPx = height / 2;  
float clip = (width - height) / 2;  
left = clip;  
right = width - clip;  
top = 0;  
bottom = height;  
width = height;  
dst\_left = 0;  
dst\_top = 0;  
dst\_right = height;  
dst\_bottom = height;  
\}  
  
Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB\_8888);  
Canvas canvas = new Canvas(output);  
  
final int color = 0xff424242;  
final Paint paint = new Paint();  
final Rect src = new Rect((int) left, (int) top, (int) right,  
(int) bottom);  
final Rect dst = new Rect((int) dst\_left, (int) dst\_top,  
(int) dst\_right, (int) dst\_bottom);  
final RectF rectF = new RectF(dst);  
  
paint.setAntiAlias(true);  
  
canvas.drawARGB(0, 0, 0, 0);  
paint.setColor(color);  
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  
  
paint.setXfermode(new PorterDuffXfermode(Mode.SRC\_IN));  
canvas.drawBitmap(bitmap, src, dst, paint);  
return output;  
\}  
  
/\*\*  
\* 获取圆角  
\*  
\* @param bitmap  
\* @param pixels 角度  
\* @return  
\*/  
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) \{  
if (bitmap != null) \{  
final Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),  
bitmap.getHeight(), Config.ARGB\_8888);  
if (output != null) \{  
final Canvas canvas = new Canvas(output);  
final int color = 0xff424242;  
final Paint paint = new Paint();  
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());  
final RectF rectF = new RectF(rect);  
final float roundPx = pixels;  
paint.setAntiAlias(true);  
canvas.drawARGB(0, 0, 0, 0);  
paint.setColor(color);  
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  
paint.setXfermode(new PorterDuffXfermode(Mode.SRC\_IN));  
canvas.drawBitmap(bitmap, rect, rect, paint);  
return output;  
\}  
\}  
  
return null;  
\}  
  
/\*\*  
\*  
\* 从Assets中读取图片  
\* @param String filepath 相对路径  
\* @return Bitmap  
\*/  
public static Bitmap getImageFromAssetsFile(String filepath, Context context) \{  
Bitmap image = null;  
InputStream is = null;  
AssetManager am = context.getResources().getAssets();  
try \{  
is = am.open(filepath);  
image = BitmapFactory.decodeStream(is);  
is.close();  
\} catch (IOException e) \{  
e.printStackTrace();  
\} finally \{  
if (is != null)  
try \{  
is.close();  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
\}  
  
return image;  
\}  
  
public static InputStream getImageFromAssetsFileInputStream(String filepath, Context context) \{  
InputStream is = null;  
AssetManager am = context.getResources().getAssets();  
try \{  
is = am.open(filepath);  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return is;  
\}  
  
/\*\*  
\* 按比例缩小图片（单位像素） lessen the bitmap  
\*  
\* @param src  
\* bitmap  
\* @param destWidth  
\* the dest bitmap width  
\* @param destHeigth  
\* @return new bitmap if successful ,oherwise null  
\*/  
public static Bitmap lessenBitmap(Context context, int resId, int destWidth, int destHeigth) \{  
  
final BitmapFactory.Options opt = new BitmapFactory.Options();  
opt.inPreferredConfig = Bitmap.Config.RGB\_565;  
opt.inPurgeable = true;  
opt.inInputShareable = true;  
// 获取资源图片  
final InputStream is = context.getResources().openRawResource(resId);  
final Bitmap bitmap = BitmapFactory.decodeStream(is, null, opt);  
  
try \{  
if (is != null) \{  
is.close();  
\}  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
  
final int w = bitmap.getWidth();// 源文件的大小  
final int h = bitmap.getHeight();  
float scaleWidth = ((float) destWidth) / w;// 宽度缩小比例  
float scaleHeight = ((float) destHeigth) / h;// 高度缩小比例  
final Matrix m = new Matrix();// 矩阵  
m.postScale(scaleWidth, scaleHeight);// 设置矩阵比例  
final Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, m, true);// 直接按照矩阵的比例把源文件画入进  
  
if (!bitmap.isRecycled()) \{  
bitmap.recycle();  
\}  
  
return resizedBitmap;  
\}  
  
/\*\*  
\* 判断图片旋转情况  
\*  
\* @param path  
\* @return  
\*/  
public static int readPictureDegree(String path) \{  
int degree = 0;  
try \{  
final ExifInterface exifInterface = new ExifInterface(path);  
final 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  
\* @param path 图片路径  
\* @param bitmap 原图  
\* @return  
\*/  
public static Bitmap rotaingImageView(String path, Bitmap bitmap) \{  
// 旋转图片 动作  
Matrix matrix = new Matrix();  
final int angle = readPictureDegree(path);  
if (angle != 0) \{  
matrix.postRotate(angle);  
\}  
// 创建新的图片  
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);  
return resizedBitmap;  
\}  
  
/\*\*  
\* 图片旋转  
\*  
\* @param bm  
\* 图片资源Bitmap  
\* @param curDegrees  
\* //当前旋转度数  
\*/  
public static Bitmap rotateBitmap(Bitmap bm, float curDegrees) \{  
return rotateBitmap(bm, curDegrees, true);  
\}  
  
public static Bitmap rotateBitmap(Bitmap bm, float curDegrees, boolean isRecycled) \{  
if (bm == null) \{  
return null;  
\}  
final int bmpW = bm.getWidth();  
final int bmpH = bm.getHeight();  
// 注意这个Matirx是android.graphics底下的那个  
final Matrix mt = new Matrix();  
mt.reset();  
mt.setRotate(curDegrees);  
final Bitmap bitmap = Bitmap.createBitmap(bm, 0, 0, bmpW, bmpH, mt,  
true);  
  
if (isRecycled && !bm.isRecycled()) \{  
bm.recycle();  
\}  
return bitmap;  
\}  
  
/\*\*  
\* 根据uri获取图片  
\* @param context  
\* @param uri  
\* @return  
\*/  
public static Bitmap getBitmapFromUri(Context context, Uri uri) \{  
try \{  
// 读取uri所在的图片  
final Bitmap bitmap = MediaStore.Images.Media.getBitmap(  
context.getContentResolver(), uri);  
return bitmap;  
\} catch (Exception e) \{  
e.getMessage();  
return null;  
\}  
\}  
  
/\*\*  
\* 图片uri转path  
\* //  
\*  
\* @param uri  
\* @param activity  
\* @return  
\*/  
public static String getPicPathFromUri(Uri uri, Activity activity) \{  
String value = uri.getPath();  
  
try \{  
if (value.startsWith("/external")) \{  
String\[\] proj = \{MediaStore.Images.Media.DATA\};  
Cursor cursor = activity.managedQuery(uri, proj, null, null, null);  
// Cursor cursor = activity.getContentResolver().query(uri, proj, null, null, null);  
if (cursor != null && cursor.getCount() > 0) \{  
int column\_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);  
cursor.moveToFirst();  
final String picUri = cursor.getString(column\_index);  
//4.0以上的版本会自动关闭 (4.0--14;; 4.0.3--15)  
if(Integer.parseInt(Build.VERSION.SDK) < 14)  
\{  
if (cursor != null) \{  
cursor.close();  
\}  
\}  
return picUri;  
\}  
\}  
\} catch (Exception e) \{  
e.printStackTrace();  
return "";  
\}  
return value;  
\}  
  
public static Bitmap getPathToBitmap(String filePath) \{  
Bitmap bm = BitmapFactory.decodeFile(filePath);  
  
// 处理某些手机拍照角度旋转的问题  
final int degree = readPictureDegree(filePath);  
if (degree != 0) \{// 旋转照片角度  
bm = rotateBitmap(bm, degree);  
\}  
return bm;  
\}  
  
/\*\*  
\* 根据路径获得突破并压缩返回bitmap用于显示  
\*  
\* @param imagesrc  
\* @return  
\*/  
public static Bitmap getSmallBitmap(String filePath) \{  
final BitmapFactory.Options options = new BitmapFactory.Options();  
options.inJustDecodeBounds = true;  
BitmapFactory.decodeFile(filePath, options);  
  
// Calculate inSampleSize  
options.inSampleSize = calculateInSampleSize(options, 480, 800);  
  
// Decode bitmap with inSampleSize set  
options.inJustDecodeBounds = false;  
  
  
Bitmap bm = BitmapFactory.decodeFile(filePath, options);  
  
// 处理某些手机拍照角度旋转的问题  
final int degree = readPictureDegree(filePath);  
if (degree != 0) \{// 旋转照片角度  
bm = rotateBitmap(bm, degree);  
\}  
return bm;  
\}  
  
public static int calculateInSampleSize(BitmapFactory.Options options,  
int reqWidth, int reqHeight) \{  
// Raw height and width of image  
final int height = options.outHeight;  
final int width = options.outWidth;  
int inSampleSize = 1;  
  
if (height > reqHeight || width > reqWidth) \{  
  
// Calculate ratios of height and width to requested height and  
// width  
final int heightRatio = Math.round((float) height  
/ (float) reqHeight);  
final int widthRatio = Math.round((float) width / (float) reqWidth);  
  
// Choose the smallest ratio as inSampleSize value, this will  
// guarantee  
// a final image with both dimensions larger than or equal to the  
// requested height and width.  
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;  
\}  
  
return inSampleSize;  
\}  
  
/\*\*  
\* 从文件中获取图片  
\*  
\* @param path  
\* @return  
\*/  
public static byte\[\] decodeBitmap(String path) \{  
BitmapFactory.Options opts = new BitmapFactory.Options();  
opts.inJustDecodeBounds = true;// 设置成了true,不占用内存，只获取bitmap宽高  
BitmapFactory.decodeFile(path, opts);  
opts.inSampleSize = computeSampleSize(opts, -1, 1024 \* 800);  
opts.inJustDecodeBounds = false;// 这里一定要将其设置回false，因为之前我们将其设置成了true  
opts.inPurgeable = true;  
opts.inInputShareable = true;  
opts.inDither = false;  
opts.inPurgeable = true;  
opts.inTempStorage = new byte\[16 \* 1024\];  
FileInputStream is = null;  
Bitmap bmp = null;  
ByteArrayOutputStream baos = null;  
try \{  
is = new FileInputStream(path);  
bmp = BitmapFactory.decodeFileDescriptor(is.getFD(), null, opts);  
double scale = getScaling(opts.outWidth \* opts.outHeight,  
1024 \* 600);  
Bitmap bmp2 = Bitmap.createScaledBitmap(bmp,  
(int) (opts.outWidth \* scale),  
(int) (opts.outHeight \* scale), true);  
bmp.recycle();  
baos = new ByteArrayOutputStream();  
bmp2.compress(Bitmap.CompressFormat.JPEG, 100, baos);  
bmp2.recycle();  
return baos.toByteArray();  
\} catch (FileNotFoundException e) \{  
e.printStackTrace();  
\} catch (IOException e) \{  
e.printStackTrace();  
\} finally \{  
try \{  
is.close();  
baos.close();  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
System.gc();  
\}  
return null;  
\}  
  
private static double getScaling(int src, int des) \{  
/\*\*  
\* 48 目标尺寸÷原尺寸 sqrt开方，得出宽高百分比 49  
\*/  
double scale = Math.sqrt((double) des / (double) src);  
return scale;  
\}  
  
/\*\*  
\* 使用该算法，就可动态计算出图片的inSampleSize。  
\*  
\* @param options  
\* @param minSideLength  
\* 调整后图片最小的宽或高值  
\* @param maxNumOfPixels  
\* 最大分辨率  
\* @return  
\*/  
private static int computeSampleSize(BitmapFactory.Options options,  
int minSideLength, int maxNumOfPixels) \{  
final int initialSize = computeInitialSampleSize(options, minSideLength,  
maxNumOfPixels);  
  
int roundedSize;  
if (initialSize <= 8) \{  
roundedSize = 1;  
while (roundedSize < initialSize) \{  
roundedSize <<= 1;  
\}  
\} else \{  
roundedSize = (initialSize + 7) / 8 \* 8;  
\}  
  
return roundedSize;  
\}  
  
/\*\*  
\* 长度单位转换  
\* @param context  
\* @param unit  
\* @param value  
\* @return  
\*/  
public static float applyDimension(Context context,int unit, float value)\{  
DisplayMetrics metrics = context.getResources().getDisplayMetrics();  
return TypedValue.applyDimension(unit, value, metrics);  
\}  
\}