タイトル | : MapTel 問題発生 |
投稿日 | : 2020/02/09(Sun) 13:21 |
投稿者 | : kasai |
アンドロイド基礎講習の「アクティビティのライフサイクル」で調査logを輩出するようにして、実行したところ、エミュレータ画面で"問題が発生したため、MapTel を終了します。"のメッセージが出ました。Logcat出力を以下に示します。よろしくお願いいたします。
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02-09 01:24:58.930 4184-4184/? E/libprocessgroup: failed to make and chown /acct/uid_10060: Read-only file system
02-09 01:24:58.930 4184-4184/? W/Zygote: createProcessGroup failed, kernel missing CONFIG_CGROUP_CPUACCT?
02-09 01:24:58.930 4184-4184/? I/art: Not late-enabling -Xcheck:jni (already on)
02-09 01:24:58.993 4184-4184/? D/AndroidRuntime: Shutting down VM
--------- beginning of crash
02-09 01:24:58.994 4184-4184/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: searchman.example.com, PID: 4184
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{searchman.example.com/searchman.example.com.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.content.ContextWrapper.getResources(ContextWrapper.java:85)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:74)
at androidx.appcompat.app.AppCompatActivity.getResources(AppCompatActivity.java:543)
at searchman.example.com.MainActivity.<init>(MainActivity.java:16)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.Class.newInstance(Class.java:1572)
at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
at android.app.ActivityThread.access$800(ActivityThread.java:144) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:135) 
at android.app.ActivityThread.main(ActivityThread.java:5221) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
02-09 01:25:43.444 4184-4184/searchman.example.com I/Process: Sending signal. PID: 4184 SIG: 9
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