仅＆＃x27; else＆＃x27;如果其他＆＃x27;我的Android应用中的声明

Question

每当我运行该应用程序并输入4作为答案时，它仍会显示不正确（来自其他语句）。 （我对Android编码是相对较新的，并且找不到在线的精确解决方案。）

这是我的代码：

public class MainActivity extends AppCompatActivity {

    EditText answer;
    ImageButton ttsBtn;
    Button submitBtn;
    TextToSpeech textToSpeech;
    TextView txt;
    int num;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        answer = (EditText)findViewById(R.id.answer);
        ttsBtn = (ImageButton) findViewById(R.id.ttsButton);
        submitBtn = (Button)findViewById(R.id.submitBtn);
        txt = (TextView) findViewById(R.id.question);
        String ans = answer.getText().toString();
        if (!ans.isEmpty())
        {num = Integer.parseInt(answer.getText().toString());}

        textToSpeech = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int i) {
                if(i!=TextToSpeech.ERROR){
                    // To Choose language of speech
                    textToSpeech.setLanguage(Locale.UK);
                }
            }
        });

        ttsBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String newSpeech = "What is 2 multiplied by 2?";
                textToSpeech.speak(newSpeech,TextToSpeech.QUEUE_FLUSH,null);
            }
        });

        submitBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (num == 4){
                    Toast.makeText(MainActivity.this, "Answer is Correct!", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    Toast.makeText(MainActivity.this, "Answer is Incorrect", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

Answer 1

用以下代码替换您的cumbtbtn onclick。问题是您没有分配最新的答案价值。

submitBtn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        num = Integer.parseInt(answer.getText().toString());
        if (num == 4){
            Toast.makeText(MainActivity.this, "Answer is Correct!", Toast.LENGTH_SHORT).show();
        }
        else
        {
            Toast.makeText(MainActivity.this, "Answer is Incorrect", Toast.LENGTH_SHORT).show();
        }
    }
});