位图有时为空

Question

我有问题。请看我的代码。

if(savedInstanceState==null){
        mImagePath = getIntent().getStringExtra("path");

        new Thread(new Runnable() {
            @Override
            public void run() {
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inMutable=true;

                ExifInterface exif;
                try {
                    exif = new ExifInterface(new File(mImagePath).getAbsolutePath());
                    int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);

                    int rotate = 0;

                    switch (orientation) {
                        case ExifInterface.ORIENTATION_ROTATE_270:
                            rotate = 270;
                            break;
                        case ExifInterface.ORIENTATION_ROTATE_180:
                            rotate = 180;
                            break;
                        case ExifInterface.ORIENTATION_ROTATE_90:
                            rotate = 90;
                            break;
                    }

                    Bitmap rotatedBitmap = BitmapFactory.decodeFile(mImagePath,options);

                    if(rotatedBitmap==null){
                        Answers.getInstance().logCustom(new CustomEvent("Null 1"));
                        // The first place where sometimes bitmap is null
                    }


                    assert rotatedBitmap != null;
                    int width = rotatedBitmap.getWidth();
                    int height = rotatedBitmap.getHeight();


                    if (Math.max(width,height)>MAX_LENGTH_OF_IMAGE){
                        // if widht or height >1500 px then i resize the image
                        float factor = MAX_LENGTH_OF_IMAGE/Math.max(width,height);
                        width=(int)(width*factor);
                        height=(int)(height*factor);
                        mOriginalBitmap = Bitmap.createScaledBitmap(rotatedBitmap,width,height,true);
                        rotatedBitmap.recycle();
                    } else
                        mOriginalBitmap=rotatedBitmap;

                    if(rotate!=0){
                        Matrix matrix = new Matrix();
                        matrix.postRotate(rotate);
                        rotattedBitmap=Bitmap.createBitmap(mOriginalBitmap, 0, 0, width, height, matrix, true);
                        mOriginalBitmap.recycle();
                        mOriginalBitmap=rotattedBitmap;
                    }
                    if(mOriginalBitmap==null){
                        Answers.getInstance().logCustom(new CustomEvent("Null 187"));
                        //I didn't receive this message
                    }

                } catch (IOException e) {
                    finish();
                    e.printStackTrace();
                }

                if(mOriginalBitmap==null){
                    Answers.getInstance().logCustom(new CustomEvent("Null 206"));
                    // The second place where bitmap sometimes is null
                }
                mCurrentBitmap=mOriginalBitmap.copy(Bitmap.Config.ARGB_8888,true);

                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        onCreated();
                    }
                });
            }
        }).start();
    }

有时位图为null（在两个地方）。在1000个用户中，有6-7个用户发生此错误。

我始终可以检查位图是否为空，并且不对此位图（bitmap.copy，bitmap.getwidth等）执行任何操作，但是我应该怎么做才能始终加载位图？