java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.itfrogs.inh/jp.itfrogs.inh.TestBluetooth}: java.lang.NullPointerException: println needs a message

ne.jp | 7 months ago
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    若者からの依頼 - /var/log/messages

    ne.jp | 7 months ago
    java.lang.RuntimeException: Unable to start activity ComponentInfo{jp.itfrogs.inh/jp.itfrogs.inh.TestBluetooth}: java.lang.NullPointerException: println needs a message
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    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.acraapp/com.example.acraapp.MainActivity}: java.lang.NullPointerException: println needs a message
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    GitHub | 4 years ago | kaushikprajapati
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.acraapp/com.example.acraapp.MainActivity}: java.lang.NullPointerException: println needs a message
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Root Cause Analysis

  1. java.lang.NullPointerException

    println needs a message

    at android.util.Log.println()
  2. Android Platform
    Log.d
    1. android.util.Log.println(Native Method)
    2. android.util.Log.d(Log.java:115)
    2 frames
  3. jp.itfrogs.inh
    TestBluetooth.onCreate
    1. jp.itfrogs.inh.TestBluetooth.onCreate(TestBluetooth.java:73)
    1 frame
  4. Android Platform
    ActivityThread.main
    1. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
    2. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
    3. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)
    4. android.app.ActivityThread.access$2100(ActivityThread.java:116)
    5. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
    6. android.os.Handler.dispatchMessage(Handler.java:99)
    7. android.os.Looper.loop(Looper.java:123)
    8. android.app.ActivityThread.main(ActivityThread.java:4203)
    8 frames
  5. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invokeNative(Native Method)
    2. java.lang.reflect.Method.invoke(Method.java:521)
    2 frames
  6. Android
    ZygoteInit.main
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
    2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
    2 frames
  7. Android Platform
    NativeStart.main
    1. dalvik.system.NativeStart.main(Native Method)
    1 frame