使用LeakCanary解决对话框片段内存泄漏

Question

我在每个项目中都有一个带textview的列表视图，单击该列表时会启动一个带有数字选择器元素的对话框，以更改该项目中的值。当使用LeakCanary库检查内存泄漏时，我遇到了与对话框片段相关的内存泄漏，当我反复启动和关闭对话框时会显示该对话框。我也查看了Stack Overflow上的类似文章，但没有一个可以解决问题。对话框片段的实现如下：

public class NumberDialog extends DialogFragment {
        NumberPicker numberPicker;
        NumberPicker numberPicker2;
        NumberPicker numberPicker3;
        public static NumberDialog newInstance() {
            NumberDialog frag = new NumberDialog ();
            return frag;
        }


        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            View child = getActivity().getLayoutInflater().inflate(R.layout.dialog, null);
             numberPicker = child.findViewById(R.id.numberPicker1);
              numberPicker2 = child.findViewById(R.id.numberPicker2);
               numberPicker3 = child.findViewById(R.id.numberPicker3);

            numberPicker.setMinValue(0);
            numberPicker.setMaxValue(59);
            numberPicker3.setMinValue(0);
            numberPicker3.setMaxValue(59);

            numberPicker2.setMinValue(0);
            numberPicker2.setMaxValue(59);

            AlertDialog.Builder builder;
            builder = new AlertDialog.Builder(getActivity(), R.style.Theme_Material_Dialog_Alert);


            builder.setTitle("Choose Value");


            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                    dismiss();
                }
            });

            builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dismiss();

                }
            });

            builder.setView(child);
            return builder.create();
        }




    }

以下是泄漏源的屏幕截图： Screenshot 1

Screenshot 2