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  1. ,

    You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

  2. ,

    Can occur when you try to convert a String to a numeric value but the String is not well formatted for the conversion.

Solutions on the web

via Stack Overflow by Ans
, 1 year ago
Unable to start activity ComponentInfo{de.nocnoc.clean.cleanlight/de.nocnoc.clean.flashlight.MainActivity}: java.lang.NumberFormatException: Invalid int: ""
via Stack Overflow by Matheus Barreto
, 1 year ago
Unable to start activity ComponentInfo{matheussfdb.dptdedoencas/matheussfdb.dptdedoencas.DiagnosticoActivity}: java.lang.NumberFormatException: Invalid int: ""
via Stack Overflow by AJD Ajay Dubey
, 9 months ago
Unable to start activity ComponentInfo{com.ajaydubey.fifamobilebulktradeprofitcounter/com.ajaydubey.fifamobilebulktradeprofitcounter.MainActivity}: java.lang.NumberFormatException: Invalid int: ""
via Stack Overflow by Amir_P
, 2 years ago
Unable to start activity ComponentInfo{com.amir_p.shafa_beta/com.amir_p.shafa_beta.MainActivity}: com.larvalabs.svgandroid.SVGParseException: java.lang.NumberFormatException: Invalid float: "206.98164pt"
via Stack Overflow by Aloweiwi
, 1 year ago
Unable to start activity ComponentInfo{de.nocnoc.clean.cleanlight/de.nocnoc.clean.flashlight.MaincourseActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
via GitHub by farukcankaya
, 1 year ago
Unable to start activity ComponentInfo{/io.intercom.android.sdk.activities.IntercomMessengerActivity}: java.lang.IllegalArgumentException: Invalid key: name
java.lang.NumberFormatException: Invalid int: ""	at java.lang.Integer.invalidInt(Integer.java:138)	at java.lang.Integer.parseInt(Integer.java:358)	at java.lang.Integer.parseInt(Integer.java:334)	at de.nocnoc.clean.flashlight.MainActivity.onCreate(MainActivity.java:32)	at android.app.Activity.performCreate(Activity.java:6285)	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)