java - Java:放入十进制数字时会崩溃[RESOLVE]

Question

好的，我的问题是:我创建了一个应用程序来计算我的IMC(法语)。但是，当我尝试在EditText中以十进制输入我的身高或体重时，会返回此错误:

03-27 18:52:25.459 31274-31274/fr.imc.oxyz0n359.imc E/AndroidRuntime: FATAL EXCEPTION: main
                                                                  Process: fr.imc.oxyz0n359.imc, PID: 31274
                                                                  java.lang.NumberFormatException: For input string: "1.5"
                                                                      at java.lang.Integer.parseInt(Integer.java:521)
                                                                      at java.lang.Integer.parseInt(Integer.java:556)
                                                                      at fr.imc.oxyz0n359.imc.MainActivity$1.onClick(MainActivity.java:27)
                                                                      at android.view.View.performClick(View.java:5675)
                                                                      at android.view.View$PerformClick.run(View.java:22641)
                                                                      at android.os.Handler.handleCallback(Handler.java:836)
                                                                      at android.os.Handler.dispatchMessage(Handler.java:103)
                                                                      at android.os.Looper.loop(Looper.java:203)
                                                                      at android.app.ActivityThread.main(ActivityThread.java:6251)
                                                                      at java.lang.reflect.Method.invoke(Native Method)
                                                                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1063)
                                                                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:924)

这是我的代码:

public class MainActivity extends AppCompatActivity {

private TextView Resultat;
private Button Calcul;
private EditText Poids, Taille;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Resultat = (TextView)findViewById(R.id.Resultat);
    Calcul = (Button)findViewById(R.id.Calcul);
    Poids = (EditText)findViewById(R.id.Poids);
    Taille = (EditText)findViewById(R.id.Taille);
    Calcul.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int Etape = Integer.parseInt(Taille.getText().toString())*Integer.parseInt(Taille.getText().toString());
            int Result = Integer.parseInt(Poids.getText().toString())/Etape;
            Resultat.setText("IMC : " + Result);
        }
    });
}
}

感谢您的回答，OxYz0n359。

编辑:我解决了这个问题，感谢您的回答，我将代码更改为:

public class MainActivity extends AppCompatActivity {

private TextView Resultat;
private Button Calcul;
private EditText Poids, Taille;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Resultat = (TextView)findViewById(R.id.Resultat);
    Calcul = (Button)findViewById(R.id.Calcul);
    Poids = (EditText)findViewById(R.id.Poids);
    Taille = (EditText)findViewById(R.id.Taille);
    Calcul.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            double etape = Double.parseDouble(Taille.getText().toString())*Double.parseDouble(Taille.getText().toString());
            double result = Double.parseDouble(Poids.getText().toString())/etape;
            Resultat.setText("IMC : " + result);
        }
    });
}
}

Answer 1

“1.5”不是整数，您需要将其解析为Double，只有在将其转换为最适合您的整数之后，才可以将其解析为Double。另外，在Java变量名称中，从小写字母开始，我建议您紧跟该习惯。