java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rada.radastaff/com.rada.radastaff.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ToggleButton.setChecked(boolean)' on a null object reference

Stack Overflow | TruongHieu | 10 months ago
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    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rada.radastaff/com.rada.radastaff.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ToggleButton.setChecked(boolean)' on a null object reference
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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.widget.ToggleButton.setChecked(boolean)' on a null object reference

      at com.rada.radastaff.MainActivity.onCreate()
    2. com.rada.radastaff
      MainActivity.onCreate
      1. com.rada.radastaff.MainActivity.onCreate(MainActivity.java:20)
      1 frame
    3. Android Platform
      ActivityThread.main
      1. android.app.Activity.performCreate(Activity.java:5975)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2269)
      4. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2376)
      5. android.app.ActivityThread.access$800(ActivityThread.java:147)
      6. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
      7. android.os.Handler.dispatchMessage(Handler.java:102)
      8. android.os.Looper.loop(Looper.java:135)
      9. android.app.ActivityThread.main(ActivityThread.java:5253)
      9 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      2. java.lang.reflect.Method.invoke(Method.java:372)
      2 frames