File.delete()不会完全删除留下的图像空白图像文件

在我的应用程序中，您拍摄的照片将其保存到SD卡中，然后用户可以选择如何处理它.删除，保存或发送.如果按删除.我调用 File.delete()时，它会在我浏览图库时删除文件，然后当我有时稍后再返回时，我看到一个黑色图像，表示无法加载文件.该图像是我之前尝试删除的图像.这有什么问题，为什么它不能完全消失?

In my app you it takes a picture saves it to the SD card then user gets to chose what to do with it. Delete, save, or send. If you press delete. I call File.delete() it deletes the files when I go look in the gallery and then when I sometimes go back later I see a black image saying file cannot load. That image is the one I attempted to delete earlier. What is wrong with this and why doesn't it completely go away?

我如何保存图像:

public static File getOutputMediaFile(byte[] data){
    image= BitmapFactory.decodeByteArray(data, 0, data.length);
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "FrontFlash");
    // Create the storage directory if it does not exist
    if (!mediaStorageDir.exists()){
        if (!mediaStorageDir.mkdirs()) return null;
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File mediaFile;
    mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
    return mediaFile;
}
@Override
public void onPictureTaken(byte[] data, Camera camera){
    pictureFile = Util.getOutputMediaFile(data);
    if (pictureFile == null){
        Toast.makeText(this, "Couldn't create file", Toast.LENGTH_SHORT).show();
    }
    else{
        try{
            FileOutputStream fos = new FileOutputStream(pictureFile);
            fos.write(data);
            fos.close();
        }
        catch (FileNotFoundException e){
            Toast.makeText(this, "File not found exception", Toast.LENGTH_SHORT).show();
        }
        catch (IOException e){
            Toast.makeText(this, "IO Exception", Toast.LENGTH_SHORT).show();
        }
    }

    sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "FrontCam"))));
    String photopath = pictureFile.getPath().toString();

//旋转图像

bmp = BitmapFactory.decodeFile(photopath);
matrix = new Matrix();
matrix.postRotate(270);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
    FileOutputStream fOut;
    try {
        fOut = new FileOutputStream(pictureFile);
        bmp.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
        fOut.flush();
        fOut.close();
    } catch (FileNotFoundException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

在onClick上删除图片的地方

where onClick where image is delete

public void exit( View view){
    deleted = pictureFile.delete();
    //startActivity(home);
    close();
    finish();
}