java.lang.RuntimeException

Unable to start activity ComponentInfo{assignment02.csc214.assignment04/assignment02.csc214.assignment04.ChangeMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference


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Unable to start activity ComponentInfo{assignment02.csc214.assignment04/assignment02.csc214.assignment04.ChangeMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
Unable to start activity ComponentInfo{com.muchmore.www.chasquido/com.muchmore.www.chasquido.Upload}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by user3228899
, 1 year ago
Unable to start activity ComponentInfo{com.example.satan.custommm/com.example.satan.custommm.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by Falconx
, 1 year ago
Unable to start activity ComponentInfo{com.example.admins.assignment1/com.example.admins.assignment1.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
Unable to start activity ComponentInfo{com.pi.cas.ndtc/com.pi.cas.ndtc.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by bhushan2k
, 1 year ago
Unable to start activity ComponentInfo{info.androidhive.materialdesign/info.androidhive.materialdesign.activity.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
Unable to start activity ComponentInfo{com.example.joey.mydatabase/com.example.joey.mydatabase.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
Unable to start activity ComponentInfo{com.example.mcsipl_hplaptop240_1.language/com.example.mcsipl_hplaptop240_1.language.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
via Stack Overflow by Johnny
, 1 year ago
Unable to start activity ComponentInfo{com.example.myname.myapp/com.example.myname.myapp.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Solution icon of stackoverflow
Unable to start activity ComponentInfo{com.xxxxx.xxxxx/com.xxxxx.xxxxx.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference

Stack trace

  • java.lang.RuntimeException: Unable to start activity ComponentInfo{assignment02.csc214.assignment04/assignment02.csc214.assignment04.ChangeMessageActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)

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