Java 选择文件时出现空指针异常

我正在编写一个联系人表单，其中我正在创建一个带有按钮的文件选择器，但问题是，如果文件大小很大，那么它将不幸停止，如果没有文件资源管理器，那么它将给出空指针异常。 这是意向书

Intent intent= new Intent(Intent.ACTION_PICK);

            intent.setAction(Intent.ACTION_GET_CONTENT);// its optional
            intent.setType("image/*");
            final int SELECT_IMAGE = 1;
            startActivityForResult(Intent.createChooser(intent, "Select  Picture"), SELECT_IMAGE);
and here is the code of on activity result
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        try {

           if (requestCode == 1 && resultCode == RESULT_OK ) {


                Uri selectedImage = data.getData();
                String[] filePathColumn = {MediaStore.Images.Media.DATA};

                Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
                cursor.moveToFirst();

                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                String filePath = cursor.getString(columnIndex);
                cursor.close();

     //this code converts image in base64 and the string is to be sent along post method:
                yourSelectedImage = BitmapFactory.decodeFile(filePath);
                try {
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    yourSelectedImage.compress(Bitmap.CompressFormat.JPEG, 100, baos);
                    byte[] imageBytes = baos.toByteArray();
                    encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);


                } catch (Exception e) {
                    Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
                }


            } else {
                Toast.makeText(this, resultCode, Toast.LENGTH_LONG).show();
            }
        }
        catch(Exception e)
        {
            Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
        }

    }

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添加stacktrace并标记引发异常的行。5924-5924/darteweb.cqc E/AndroidRuntime﹕ 致命异常：main java.lang.OutOfMemoryError:（Heap Size=32803KB，Allocated=29166KB）使用编辑功能添加完整的堆栈跟踪。