android - 如何在 TextView 中显示已解析的整数字符串

Question

我在获取包含用户输入的字符串并在单击按钮时将其显示在 TextView 中时遇到困难。例如，如果用户键入 10 并单击按钮，我希望 TextView 显示 10。我收到一条警告，指出从未使用过 answerINT。

我遇到困难的代码

                //Fetches user answer and converts it into an integer
                EditText answer = (EditText)findViewById(R.id.editanswer); {
                if (answer.getText().toString().length() > 0){
                    int answerInt = Integer.parseInt(answer.getText().toString());

                    //Display answer in textview on click
                    TextView displayanswer = (TextView) findViewById(R.id.tvdisplayanswer);
                    displayanswer.setText(answer);

                }

上下文中的代码

            findViewById(R.id.btnok).setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                Log.d("onClick", "OK button was clicked");

                //Fetches user answer and converts it into an integer
                EditText answer = (EditText)findViewById(R.id.editanswer); {
                if (answer.getText().toString().length() > 0){
                    int answerInt = Integer.parseInt(answer.getText().toString());

                    //Display answer in textview on click
                    TextView displayanswer = (TextView) findViewById(R.id.tvdisplayanswer);
                    displayanswer.setText(answer);

                }
            //Displaying a toast if no answer is provided
                else
                {
                    Toast.makeText(getApplicationContext(), "No answer provided!",
                           Toast.LENGTH_SHORT).show();
                }


                    }

Answer 1

试试这个

 displayanswer.setText(" "+answerInt);

或

displayanswer.setText(String.valueOf(answerInt));