l'application s'est arrêté
Bonjour mes amis,
Lorsque je teste l'application Android sur mon téléphone Samsung S6 la version Android 7.0, toujours il affiche ce message "application s'est arrêté". Je ne sais pas comment résoudre ce problème?
Voici le problème :
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| 01-04 12:00:50.992 13186-13186/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: yassine.com.calculator, PID: 13186
java.lang.RuntimeException: Unable to start activity ComponentInfo{yassine.com.calculator/yassine.com.calculator.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2927)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2988)
at android.app.ActivityThread.-wrap14(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at yassine.com.calculator.MainActivity.onCreate(MainActivity.java:22)
at android.app.Activity.performCreate(Activity.java:6942)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2880)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2988)*
at android.app.ActivityThread.-wrap14(ActivityThread.java)*
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631)*
at android.os.Handler.dispatchMessage(Handler.java:102)*
at android.os.Looper.loop(Looper.java:154)*
at android.app.ActivityThread.main(ActivityThread.java:6682)*
at java.lang.reflect.Method.invoke(Native Method)*
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)*
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)*
01-04 12:00:50.997 13186-13186/? I/Process: Sending signal. PID: 13186 SIG: 9 |
