Question

我有一个关于BitMapFactory.decodeFile的问题。

在我的应用中，我希望用户能够从他/她的设备中选择图像或拍照。然后必须在ImageView（medica_photo）中显示。我也尝试缩小图像，因为在我以前的代码中我得到了OutOfMemory错误。

问题是选择图片后，我的应用会抛出此异常：

FileNotFoundException: Unable to decode stream: 
java.io.FileNotFoundException: /content:/media/external/images/media/1499:
open failed: ENOENT (No such file or directory)

代码段：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == CAPTURE_PHOTO) {
        if (resultCode == RESULT_OK) {
            String result = data.getDataString();
            setPhoto(result);
        }
    }

    // browse photo
    if (requestCode == BROWSE_PHOTO) {
        if (resultCode == RESULT_OK) {
            String result = data.getDataString();
            setPhoto(result);
        }
        if (resultCode == RESULT_CANCELED) {

        }
    }
}



private void setPhoto(String path) {
    // re-scale image first
    try {
        File file = new File(path);
        Log.e("MedicationAdd.setPhoto->file",file.getAbsolutePath()); // this did not work 

        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true; 
        BitmapFactory.decodeFile(path,options); // FileNotFound
        options.inSampleSize = scaleDownBitmap(options, options.outWidth, options.outHeight);
        Log.e("MedicationAdd.setPhoto->path",path);
        options.inJustDecodeBounds = false;
        this.bm = BitmapFactory.decodeFile(path,options); // FileNotFound

        this.medication_photo.setImageBitmap(this.bm);
    } catch (Exception e) {
        Log.e("MedicationAdd.setPhoto", e.toString());
    }
}

Answer 1

试试这个....图片uri

Uri imageUri = data.getData();
try {
   bm = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
   iv_profile.setImageBitmap(bm);
} catch (FileNotFoundException e) {
  // TODO Auto-generated catch block
   e.printStackTrace();
} catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
}

Answer 2

感谢您的回复，它让我朝着正确的方向前进。最后这篇文章进一步帮助了我：https://stackoverflow.com/a/2636538/3287175

Answer 3

path，用于在以下行中创建File onbject ...

File file = new File(path);

并在下面的行中解码位图...

this.bm = BitmapFactory.decodeFile(path,options);

甚至不是Folder或File目录。因此，首先，请检查您的path是否包含正确的File路径......这样可以解决您的问题。

假设您将图像保存到名为ABC.jpg的SDCArd中，那么正确的图像文件路径应如下所示......

/mnt/sdcard/ABC.png

BitmapFactory.decodeFile返回fileNotFoundException

3 个答案: