我有一个旋转图像的方法，但我总是收到 OutMemoryError，但我在图库中的图像是从相机拍摄的，尺寸宽度是 5000~ 来自手机
我将照片调整为宽度 1280 和高度 960
我第一个显示和调整图像大小的方法是
public static Boolean ShowImagesCapture(Context context, Uri PATH_IMAGE, ImageCropView view,int width, int height){
int orientation=0;
Boolean success = true;
try {
Bitmap bitmap =null;
if (Build.VERSION.SDK_INT < 19) {
String selectedImagePath = getPath(PATH_IMAGE,context);
bitmap = BitmapFactory.decodeFile(selectedImagePath);
orientation=GetPhotoOrientation(context,getRealPathFromURI(context,PATH_IMAGE));
}
else {
ParcelFileDescriptor parcelFileDescriptor;
try {
parcelFileDescriptor = context.getContentResolver().openFileDescriptor(PATH_IMAGE, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
bitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
orientation=GetPhotoOrientation(context,getRealPathFromURI(context,PATH_IMAGE));
} catch (Exception e) {
e.printStackTrace();
}
}
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_180:
bitmap=rotateBitmap(bitmap,3,width,height);
view.setImageBitmap(bitmap);
break;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
bitmap=rotateBitmap(bitmap,8,width,height);
view.setImageBitmap(bitmap);
break;
case ExifInterface.ORIENTATION_TRANSVERSE:
break;
case ExifInterface.ORIENTATION_ROTATE_270:
bitmap=rotateBitmap(bitmap,6,width,height);
view.setImageBitmap(bitmap);
break;
default:
view.setImageBitmap(bitmap);
}
bitmap = null;
}
catch (Exception e) {
e.printStackTrace();
success= false;
}
System.gc();
return success;
}
我旋转图片的方法是
public static Bitmap rotateBitmap(Bitmap bitmap, int orientation,int width,int height) {
try {
Matrix matrix = new Matrix();
switch (orientation) {
case ExifInterface.ORIENTATION_NORMAL:
return bitmap;
case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
// matrix.setScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
matrix.setRotate(180);
break;
case ExifInterface.ORIENTATION_FLIP_VERTICAL:
matrix.setRotate(180);
// matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_TRANSPOSE:
matrix.setRotate(90);
// matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_90:
matrix.setRotate(90);
break;
case ExifInterface.ORIENTATION_TRANSVERSE:
matrix.setRotate(-90);
// matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
matrix.setRotate(-270);
break;
default:
return bitmap;
}
Bitmap bmRotated = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
bitmap.recycle();
return bmRotated;
}
catch (OutOfMemoryError e) {
Log.e(TAG,"Out memory Error");
return null;
}catch (Exception e){
e.printStackTrace();
return null;
}
}
我的错误在哪里？
*--------------------** 2016 年 6 月 27 日更新 **-------------------- *
我的代码在最佳版本中运行良好
public static Bitmap rotateBitmap(Bitmap bitmap, int orientation,int width,int height) {
try {
Matrix matrix = new Matrix();
switch (orientation) {
case ExifInterface.ORIENTATION_NORMAL:
return bitmap;
case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
matrix.setScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
matrix.setRotate(180);
break;
case ExifInterface.ORIENTATION_FLIP_VERTICAL:
matrix.setRotate(180);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_TRANSPOSE:
matrix.setRotate(90);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_90:
matrix.setRotate(90);
break;
case ExifInterface.ORIENTATION_TRANSVERSE:
matrix.setRotate(-90);
matrix.postScale(-1, 1);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
matrix.setRotate(-270);
break;
default:
return bitmap;
}
Bitmap bmRotated= null;
try {
Bitmap tmp_bitmap= Bitmap.createScaledBitmap(bitmap,width,height,true);
bmRotated = Bitmap.createBitmap(tmp_bitmap, 0, 0, tmp_bitmap.getWidth(),tmp_bitmap.getHeight(), matrix, true);
bitmap.recycle();
}catch (OutOfMemoryError e){
e.printStackTrace();
}
return bmRotated;
} catch (Exception e){
e.printStackTrace();
return null;
}
}
public static Bitmap decodefilebitmap(String selectedImagePath, int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(selectedImagePath, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(selectedImagePath, options);
}
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) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
//METODO PARA MOSTRAR LA IMAGEN DESDE LA GALERIA
public static Boolean ShowImagesCapture(Context context, Uri PATH_IMAGE, ImageCropView view,int width, int height){
int orientation=0;
Boolean success = true;
try {
Bitmap bitmap =null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
if (Build.VERSION.SDK_INT < 19) {
String selectedImagePath = getPath(PATH_IMAGE,context);
bitmap = decodefilebitmap(selectedImagePath,bitmap.getWidth(),bitmap.getHeight());
orientation=GetPhotoOrientation(context,getRealPathFromURI(context,PATH_IMAGE));
}
else {
ParcelFileDescriptor parcelFileDescriptor;
try {
parcelFileDescriptor = context.getContentResolver().openFileDescriptor(PATH_IMAGE, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
bitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
orientation=GetPhotoOrientation(context,getRealPathFromURI(context,PATH_IMAGE));
} catch (Exception e) {
e.printStackTrace();
}
}
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_180:
bitmap=rotateBitmap(bitmap,3,width,height);
view.setImageBitmap(bitmap);
break;
case ExifInterface.ORIENTATION_ROTATE_90:
bitmap=rotateBitmap(bitmap,8,width,height);
view.setImageBitmap(bitmap);
break;
case ExifInterface.ORIENTATION_TRANSVERSE:
break;
case ExifInterface.ORIENTATION_ROTATE_270:
bitmap=rotateBitmap(bitmap,6,width,height);
view.setImageBitmap(bitmap);
break;
default:
view.setImageBitmap(bitmap);
}
bitmap = null;
}
catch (Exception e) {
e.printStackTrace();
success= false;
}
System.gc();
return success;
}
最佳答案
那是因为你正在将整个位图加载到内存中 bitmap = BitmapFactory.decodeFile(selectedImagePath); 然后将调整大小的版本显示到 ImageView 中(但浪费内存，因为你有完整大小的版本内存)。您需要加载缩小版本。加载所有位图然后对其执行操作(缩放、旋转、将其放入 ImageView )与将该位图的缩小版本加载到内存中是不同的。例如，如果您有一张 5000 x 5000 像素的图像，假设 JPEG 格式的图像大小约为 1MB。但是当你将它加载到内存中时，你解压缩它并加载该图像的整个未压缩版本。假设您以每像素 32 位加载它，那么它在 RAM 中的大小将为 5000x5000x32 位，即大约 95MB!所以你需要加载一个按比例缩小的版本。查看此 Android 开发人员文档 about loading a scaled down bitmap version into memory .这将帮助您更好地理解问题。您还可以使用图像加载库，如 Glide .这些库可以完成所有这一切，甚至更多。
关于java - Android图片调整大小报错内存，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38058922/