我想當我單擊顯示警報對話框的按鈕“mButtonadd”時，我想在警報對話框上獲得“mTextViewResult”的值（這是一個簡單的乘法）private EditText mEditText1;private TextView mTextViewResult;private Button mButtonAdd;int a;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_builderdaily);    mEditText1 = findViewById(R.id.editText1);    a = 15;    mTextViewResult = findViewById(R.id.textView);    mButtonAdd = findViewById(R.id.button);    mButtonAdd.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            if (mEditText1.getText().toString().length() == 0) {                mEditText1.setText("0");            }            int num1 = Integer.parseInt(mEditText1.getText().toString());            final int sum = num1 * a;            mTextViewResult.setText(String.valueOf(sum));        }    });    mButtonAdd.setOnClickListener(new View.OnClickListener() {        public void onClick(View view) {            AlertDialog alertDialog = new AlertDialog.Builder(BCdaily.this).create(); //Read Update            alertDialog.setTitle("hi");            alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {                public void onClick(DialogInterface dialog, int which) {                    // here you can add functions                }            });            alertDialog.show();  //<-- See This!        }    });}}我嘗試編寫此代碼（alertDialog.setMessage(mTextViewResult.setText(String.valueOf(sum));）但沒有成功。