java - 如何从 TextView 结果获取值到 Alertdialog

Question

我希望当我单击显示警报对话框的按钮“mButtonadd”时，在警报对话框上我想获取“mTextViewResult”的值(这是一个简单的乘法)

private EditText mEditText1;
private TextView mTextViewResult;
private Button mButtonAdd;
int a;

@Override
protected 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!
        }


    });

}

}

我尝试编写此代码(alertDialog.setMessage(mTextViewResult.setText(String.valueOf(sum)); )但没有成功。

Answer 1

如果我理解你的实际问题，那么只需添加一键监听器，如下所示:

  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;
            String sumValue = String.valueOf(sum);
            mTextViewResult.setText(sumValue);

            AlertDialog alertDialog = new AlertDialog.Builder(BCdaily.this).create(); //Read Update
            alertDialog.setTitle("hi");
            alertDialog.setMessage(sumValue);

            alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    // here you can add functions
                }
            });

            alertDialog.show();  //<-- See This!

        }

    });