[英]Android OutOfMemoryException taking a picture with camera
我正在尝试拍照并在其上方添加覆盖。 这是我的代码(仅回调):
private PictureCallback mPicture = new PictureCallback() {
@Override
public void onPictureTaken(final byte[] data, Camera camera) {
if(!dirFile.exists()){
dirFile.mkdirs();
}
try {
String name = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date()) + ".jpg";
picturePath = new File(dirFile, name);
new AsyncTask<Void, Void, Void>(){
FileOutputStream fos = new FileOutputStream(picturePath);
Bitmap photo;
@Override
protected Void doInBackground(Void... params) {
photo = BitmapFactory.decodeByteArray(data, 0, data.length).copy(Config.ARGB_8888, true);
Bitmap cadre = BitmapFactory.decodeResource(getResources(), R.drawable.cadre16001200);
Canvas canvas = new Canvas(photo);
canvas.drawBitmap(cadre, new Matrix(), null);
cadre.recycle();
photo.compress(CompressFormat.JPEG, 100, fos);
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
geotag(picturePath.toString());
return null;
}
protected void onPostExecute(Void result) {
dialog.dismiss();
mCamera.startPreview();
//Affiche la nouvelle photo
picture.setImageBitmap(photo);
};
}.execute();
} catch (FileNotFoundException e) {
Log.d("PhotoActivity", "File not found: " + e.getMessage());
}
}
};
我在Samsung Galaxy S3(android 4.1.2)上收到以下错误,并显示OutOfMemoryException
07-04 10:01:24.076: E/dalvikvm-heap(2980): Out of memory on a 7680016-byte allocation.
奇怪的是,它在具有1600x1200相同分辨率的Samsung Gio(android 2.2.1)上完美运行。
我在Google上搜索了很多,因此无法使用缩小图片尺寸的主要解决方案。 这是内存问题,但是我不知道如何减少内存使用量。
编辑 :我发现了这一点,似乎是真正的问题: https : //stackoverflow.com/a/12377158/1343969
您应先将位图解码后再处理到UI,这是一个代码示例
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream stream1=new FileInputStream(f);
BitmapFactory.decodeStream(stream1,null,o);
stream1.close();
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=70;
int width_tmp=o.outWidth, height_tmp=o.outHeight;
int scale=1;
while(true){
if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
break;
width_tmp/=2;
height_tmp/=2;
scale*=2;
}
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
FileInputStream stream2=new FileInputStream(f);
Bitmap bitmap=BitmapFactory.decodeStream(stream2, null, o2);
stream2.close();
return bitmap;
} catch (FileNotFoundException e) {
}
catch (IOException e) {
e.printStackTrace();
}
return null;
}
您只需要调用Canvas
的空构造函数并在其上绘制photo
。 这将删除copy()
调用并减少内存使用量。
photo = BitmapFactory.decodeByteArray(data, 0, data.length);
Bitmap cadre = BitmapFactory.decodeResource(getResources(), R.drawable.cadre16001200);
Canvas canvas = new Canvas();
canvas.drawBitmap(photo, 0, 0, null);
canvas.drawBitmap(cadre, new Matrix(), null);
cadre.recycle();
photo.compress(CompressFormat.JPEG, 100, fos);
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