/**
* 判断原始素材的方向 （适用于相机拍摄的照片）
*
* @param path 图片的地址
* @return angle->角度
*/
@Override
public int isRotatedImage(String path) {
int angle = 0;
try {
ExifInterface exifInterface = new ExifInterface(path);
int orientationPhoto =
exifInterface.getAttributeInt("Orientation", ExifInterface.ORIENTATION_NORMAL);
switch (orientationPhoto) {
case ExifInterface.ORIENTATION_ROTATE_90:
angle = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
angle = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
angle = 270;
break;
default:
angle = 0;
break;
}
} catch (IOException e) {
Utils.debug(e.toString());
}
return angle;
}
/**
* 保存Bitmap到文件
*
* @param file 需要保存到的文件File
* @param bitmap 需要保存的源Bitmap
* @param quality 图片压缩质量，使用Constant中的IMAGE_QUALITY
* @param format 压缩格式
* @return 是否压缩成功
*/
private boolean saveBitmap(File file, Bitmap bitmap, int quality, CompressFormat format) {
if (sdCard.isSdcardAvailable()) {
try {
FileOutputStream out = new FileOutputStream(file);
if (bitmap.compress(format, quality, out)) {
out.flush();
out.close();
return true;
}
} catch (IOException e) {
Utils.debug(e.toString());
}
} else {
Utils.debug(context.getString(R.string.error_can_not_find_sdcard));
}
return false;
}
/**
* 获取重新计算大小的Bitmap 最大边不超过max
*
* @param path 图片路径
* @param max 最大边长度
* @return 新Bitmap
*/
@Override
public Bitmap resizeBitmap(String path, int max) {
int sample = 1;
BitmapFactory.Options opts = new Options();
opts.inJustDecodeBounds = true;
opts.inSampleSize = sample;
BitmapFactory.decodeFile(path, opts);
int w = opts.outWidth;
int h = opts.outHeight;
if (Math.max(w, h) > max * 4) {
sample = 8;
} else if (Math.max(w, h) > max * 2) {
sample = 4;
} else if (Math.max(w, h) > max) {
sample = 2;
}
opts.inPreferredConfig = Config.ARGB_8888;
opts.inJustDecodeBounds = false;
opts.inSampleSize = sample;
try {
return (sample == 1)
? BitmapFactory.decodeFile(path, opts)
: getScaledBitmap(BitmapFactory.decodeFile(path, opts), max);
} catch (OutOfMemoryError e) {
Utils.debug(e.toString());
opts.inSampleSize = sample * 2;
try {
return getScaledBitmap(BitmapFactory.decodeFile(path, opts), max);
} catch (OutOfMemoryError e1) {
try {
Utils.debug(e1.toString());
opts.inSampleSize = sample * 2;
return getScaledBitmap(BitmapFactory.decodeFile(path, opts), max);
} catch (Exception e2) {
Utils.debug(e2.toString());
return null;
}
}
}
}
/**
* 获取Bitmap数据
*
* @param source Bitmap数据源
* @return Bitmap的字节数据
*/
@Override
public byte[] getBitmapData(Bitmap source) {
if (source == null) {
return null;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
source.compress(CompressFormat.JPEG, 80, baos);
byte[] result = baos.toByteArray();
if (null != baos) {
try {
baos.close();
} catch (IOException e) {
Utils.debug(e.toString());
}
}
return result;
}
/**
* 旋转Bitmap
*
* @param bitmap 需要旋转的Bitmap
* @param angle 旋转的角度，正数将顺时针旋转图像，负数将逆时针旋转图像
* @return 旋转后的Bitmap
*/
@Override
public Bitmap rotateBitmap(Bitmap bitmap, int angle) {
Matrix m = new Matrix();
m.setRotate(angle);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
try {
bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, m, true);
} catch (OutOfMemoryError oom) {
try {
m.postScale(1.0f, 1.0f);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, m, true);
} catch (Exception e) {
Utils.debug(e.toString());
}
}
return bitmap;
}