Ошибка java.lang.numberformatexception: для ввода строки, сбой программы ⇐ Android

[Anonymous]

Я реализовал приложение, которое получает показания у пользователя и возвращает сообщение, однако при попытке открыть действие. Происходит следующая ошибка: < /p>

2019-04-21 10:03:27.179 4338-4338/com.example.mymedicare E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mymedicare, PID: 4338
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mymedicare/com.example.mymedicare.enteringReadings}: java.lang.NumberFormatException: For input string: ""
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.Integer.parseInt(Integer.java:620)
at java.lang.Integer.parseInt(Integer.java:643)
at com.example.mymedicare.enteringReadings.onCreate(enteringReadings.java:28)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770
< /code>

public class enteringReadings extends AppCompatActivity {

private MyDBHelper db;
//declares values
private Button Enter;
private EditText Temprature;
private EditText lowerBlood;
private EditText higherBlood;
private EditText heartBeat;

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

//Reads values as integers
Temprature = findViewById(R.id.Temprature);
int temprature =Integer.parseInt( Temprature.getText().toString());
lowerBlood = findViewById(R.id.lowerBlood);
int Lowerblood =Integer.parseInt( lowerBlood.getText().toString());
higherBlood = findViewById(R.id.higherBlood);
int Higherblood =Integer.parseInt( higherBlood.getText().toString());
heartBeat = findViewById(R.id.heartBeat);
int Heartbeat =Integer.parseInt( heartBeat.getText().toString());

Button Enter = findViewById(R.id.Enter);
db = new MyDBHelper(this);

Enter.setOnClickListener((View.OnClickListener) this);

if (temprature

Подробнее здесь: https://stackoverflow.com/questions/557 ... gram-crash