调用Android系统相册功能后，三星手机照片被旋转了90度。 经资料查询，这是由于三星手机拍照的图片旋转角度是90度，而其它手机是0度。这样思路就出来了：先查询被旋转了多少度，然后再旋转回来。
代码语言：javascript复制public class DiyCommonUtil {
private static String generateFileName() {
return UUID.randomUUID().toString();
}
private static final String SD_PATH = Environment.getExternalStorageDirectory().getPath() "/quickwater/";
public static void saveBitmap2file(Bitmap bmp, Context context, Activity activity) {
if (bmp == null) {
return;
}
String savePath;
String fileName = generateFileName() ".JPEG";
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
savePath = SD_PATH;
} else {
Toast.makeText(context, "保存失败！", Toast.LENGTH_SHORT).show();
return;
}
File filePic = new File(savePath fileName);
try {
if (!filePic.exists()) {
filePic.getParentFile().mkdirs();
filePic.createNewFile();
}
FileOutputStream fos = new FileOutputStream(filePic);
bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
activity.finish();
Toast.makeText(context, "保存成功", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 其次把文件插入到系统图库
// try {
// MediaStore.Images.Media.insertImage(context.getContentResolver(),
// filePic.getAbsolutePath(), fileName, null);
// } catch (FileNotFoundException e) {
// e.printStackTrace();
// }
// 最后通知图库更新
context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" savePath fileName)));
}
//调用该方法恢复照片角度
public static Bitmap returnRotatePhoto(String originpath) {
// 取得图片旋转角度
int angle = readPictureDegree(originpath);
// 把原图压缩后得到Bitmap对象
Bitmap bmp = getCompressPhoto(originpath);
// 修复图片被旋转的角度
Bitmap bitmap = rotaingImageView(angle, bmp);
// 保存修复后的图片并返回保存后的图片路径
return bitmap;
}
public static int readPictureDegree(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;
}
public static Bitmap rotaingImageView(int angle, Bitmap bitmap) {
Bitmap returnBm = null;
// 根据旋转角度，生成旋转矩阵
Matrix matrix = new Matrix();
matrix.postRotate(angle);
try {
// 将原始图片按照旋转矩阵进行旋转，并得到新的图片
if (bitmap != null) {
returnBm = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
} catch (OutOfMemoryError e) {
}
if (returnBm == null) {
returnBm = bitmap;
}
if (bitmap != returnBm) {
bitmap.recycle();
}
return returnBm;
}
public static Bitmap getCompressPhoto(String path) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = false;
options.inSampleSize = 10; // 图片的大小设置为原来的十分之一
Bitmap bmp = BitmapFactory.decodeFile(path, options);
options = null;
return bmp;
}
}
