Why cannot convert from string to int?

Question

It should be something easy to do, but these commands return error when I try to convert a String to integer:

        Intent recibir = getIntent();
        String nombre = recibir.getStringExtra("hora_inicio");

        int numero=0;

        try {
            numero = Integer.parseInt(nombre);
        } catch(NumberFormatException nfe) {
            nfe.printStackTrace();
        }

        Toast.makeText(this, numero, Toast.LENGTH_SHORT).show();

Android monitor returns this error:

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.cristobal.policlinica, PID: 11025 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.cristobal.policlinica/com.example.cristobal.policlinica.CalendarActivity}: android.content.res.Resources$NotFoundException: String resource ID 0x9 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: android.content.res.Resources$NotFoundException: String resource 0x9 at android.content.res.Resources.getText(Resources.java:312) at android.widget.Toast.makeText(Toast.java:286) at com.example.cristobal.policlinica.CalendarActivity.onCreate(CalendarActivity.java:31) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

thanks in advance

check this Resources$NotFoundException: String resource ID And set Toast.makeText(this, ""+numero, Toast.LENGTH_SHORT).show(); — IntelliJ Amiya
– IntelliJ Amiya, Commented May 16, 2018 at 7:32
Toast.makeText(this, String.valueOf(numero), Toast.LENGTH_SHORT).show(); — Kush Vatsa
– Kush Vatsa, Commented May 16, 2018 at 7:38

Sagar · Accepted Answer · 2018-05-16 07:37:25Z

3

The problem is not with your conversion but with your Toast.makeText. When you call Toast.makeText(this, numero, Toast.LENGTH_SHORT).show();

It considers numero as resId and tries to find the relative string resource in strings.xml which fails giving error:

Resources$NotFoundException: String resource ID

Instead of

Toast.makeText(this, numero, Toast.LENGTH_SHORT).show();

DO

Toast.makeText(this, String.valueOf(numero), Toast.LENGTH_SHORT).show();

edited May 16, 2018 at 7:37

answered May 16, 2018 at 7:33

Sagar

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6 Comments

Marc Estrada Over a year ago

As an opinion, String.valueOf(numero); is more efficient and elegant

Sagar Over a year ago

@MarcEstrada yeah, great idea. Updated the answer

Marc Estrada Over a year ago

And voted your answer :) there is a lot of lates answer saying same of you, so voted yours

Sagar Over a year ago

@MarcEstrada Thanks!

Sagar Over a year ago

@Mimmetico great! Remember to mark answer as approved, so that others can benefit too

|

Raj Bedi · Accepted Answer · 2018-05-16 07:37:13Z

1

Try this:

 number = Integer.parseInt(YourStringName.toString());

answered May 16, 2018 at 7:37

Raj Bedi

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Comments

AskNilesh · Accepted Answer · 2018-06-28 12:02:00Z

1

Toast.makeText(this, String.valueOf(numero), Toast.LENGTH_SHORT).show();

edited Jun 28, 2018 at 12:02

AskNilesh

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answered May 16, 2018 at 7:36

Hendro Pramono

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