java.lang.RuntimeException:无法启动活动android.widget.Button.setOnClickListener(android.view.View$OnClickListener)‘java.lang.NullPointerException(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(原生方法)在java.lang.refl
android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6753)
at java.lang.Object java.lang.reflect.Method.invoke: Attempt to invokevirtualmethod 'void android.widget.Button.setOnClickListener(android.view.View$OnC
Unable to start activity ComponentInfo{com.julesbsz.shortnews/com.julesbsz.shortnews.MainActivity}: java.lang.NullPointerException: Attempt to invokevirtualmethod 'int org.json.JSONArray.length()' on a null object reference)
我有下面的代码片段,但是它显示了警告,方法调用'getSearchableInfo‘可能产生'NullPointerException'if (s ==null)@NonNull ComponentName componentName = getComponentName(); .getSearchableInfo(componentName); //<-- Wa
com.example.whatsapp E/AndroidRuntime: FATAL EXCEPTION: main java.lang.NullPointerException: Attempt to invokevirtualmethod 'android.text.Editable android.widget.EditText.getText()' on a n
这是来自Android的logcat日志java.lang.NullPointerException: Attempt to invokevirtualmethod 'void com.google.android.gms.ads.AdView.loadAd(com.google.android.gms.ads.AdRequest(Looper.java:227)
at androi
java.lang.RuntimeException:Unable to start receiver com.aiyi.aiyiapp.service.PushReceiver: java.lang.NullPointerException: Attempt to invokevirtualmethod 'int java.lang.String.hashCode()' on a null object reference
android.app.Activit
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NetworkDispatcher.run: Unhandled exception java.lang.NullPointerException: Attempt to invokevirtualmethod 'int java.lang.String.length()' on a null object reference java.lang.NullPointerException: Attemptto i