出于某种原因，当我运行应用程序并检查logcat时，它给了我这个非常长的日志。这里有什么重要我应该解决的吗？
我启动应用程序后立即开始显示此日志。
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/default/optimistic_dad: No such file or directory
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/eth0/optimistic_dad: No such file or directory
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/lo/optimistic_dad: No such file or directory
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/sit0/optimistic_dad: No such file or directory
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/default/use_optimistic: No such file or directory
09-23 12:15:56.742 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/eth0/use_optimistic: No such file or directory
09-23 12:15:56.743 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/lo/use_optimistic: No such file or directory
09-23 12:15:56.743 0-939/? E/Netd﹕ Failed to open /proc/sys/net/ipv6/conf/sit0/use_optimistic: No such file or directory
09-23 12:15:56.976 929-929/? E/lowmemorykiller﹕ Kernel does not support memory pressure events or in-kernel low memory killer
09-23 12:15:57.641 932-932/? E/SurfaceFlinger﹕ hwcomposer module not found
09-23 12:15:57.856 932-1018/? E/SurfaceFlinger﹕ ro.sf.lcd_density must be defined as a build property
09-23 12:16:00.281 939-939/? E/BandwidthController﹕ runIptablesCmd(): res=1 status=256 failed /system/bin/iptables -A bw_INPUT -m owner --socket-exists
09-23 12:16:00.283 939-939/? E/BandwidthController﹕ runIptablesCmd(): res=1 status=256 failed /system/bin/ip6tables -A bw_INPUT -m owner --socket-exists
09-23 12:16:00.295 1210-1210/? E/logwrapper﹕ executing /system/bin/ip failed: No such file or directory
09-23 12:16:00.301 939-939/? E/Netd﹕ failed to flush rules
09-23 12:16:00.301 939-939/? E/CommandListener﹕ failed to initialize RouteController (Remote I/O error)
09-23 12:16:01.856 946-946/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
09-23 12:16:01.856 946-946/? E/android.os.Debug﹕ failed to load memtrack module: -2
09-23 12:16:02.613 943-1228/? E/AudioFlinger﹕ no wake lock to update!
09-23 12:16:02.615 943-943/? E/audio_hw_generic﹕ Error opening input stream format 1, channel_mask 0010, sample_rate 16000
09-23 12:16:02.615 943-943/? E/AudioFlinger﹕ int android::load_audio_interface(const char*, audio_hw_device_t**) couldn't load audio hw module audio.r_submix (No such file or directory)
09-23 12:16:02.616 943-943/? E/SoundTriggerHwService﹕ couldn't load sound trigger module sound_trigger.primary (No such file or directory)
09-23 12:16:02.743 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGujarati-Regular.ttf
09-23 12:16:02.743 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGujarati-Bold.ttf
09-23 12:16:02.743 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGujaratiUI-Regular.ttf
09-23 12:16:02.743 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGujaratiUI-Bold.ttf
09-23 12:16:02.744 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGurmukhi-Regular.ttf
09-23 12:16:02.744 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGurmukhi-Bold.ttf
09-23 12:16:02.744 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGurmukhiUI-Regular.ttf
09-23 12:16:02.744 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGurmukhiUI-Bold.ttf
09-23 12:16:02.790 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansSinhala-Regular.ttf
09-23 12:16:02.790 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansSinhala-Bold.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansThaana-Regular.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansThaana-Bold.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansCham-Regular.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansCham-Bold.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansBalinese-Regular.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansBatak-Regular.ttf
09-23 12:16:02.813 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansBuginese-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansBuhid-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansCanadianAboriginal-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansCherokee-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansCoptic-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansGlagolitic-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansHanunoo-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansJavanese-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansKayahLi-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansLepcha-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansLimbu-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansMeeteiMayek-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansOlChiki-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansRejang-Regular.ttf
09-23 12:16:02.814 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansSaurashtra-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansSundanese-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansSylotiNagri-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansTagbanwa-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansTaiLe-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansTaiTham-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansTaiViet-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansTifinagh-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansYi-Regular.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/Lohit-Odia.ttf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansHans-Regular.otf
09-23 12:16:02.815 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansHant-Regular.otf
09-23 12:16:02.816 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansJP-Regular.otf
09-23 12:16:02.816 946-946/? E/Minikin﹕ addFont failed to create font /system/fonts/NotoSansKR-Regular.otf
09-23 12:16:03.470 946-946/? E/EmojiFactory_jni﹕ Failed to load libemoji.so: dlopen failed: library "libemoji.so" not found
09-23 12:16:06.454 1232-1232/system_process E/PowerManagerService-JNI﹕ Couldn't load power module (No such file or directory)
09-23 12:16:06.501 932-1020/? E/SurfaceFlinger﹕ ro.sf.lcd_density must be defined as a build property
09-23 12:16:10.667 1232-1232/system_process E/ConsumerIrService﹕ Can't open consumer IR HW Module, error: -2
09-23 12:16:11.109 1232-1286/system_process E/EventHub﹕ could not get driver version for /dev/input/mouse0, Not a typewriter
09-23 12:16:11.125 1232-1286/system_process E/EventHub﹕ could not get driver version for /dev/input/mice, Not a typewriter
09-23 12:16:11.967 1232-1232/system_process E/WifiConfigStore﹕ associatedPartialScanPeriodMilli set to 20000
09-23 12:16:12.523 1232-1232/system_process E/Fingerprint-JNI﹕ Can't open fingerprint HW Module, error: -2
09-23 12:16:12.583 1232-1232/system_process E/SQLiteLog﹕ (283) recovered 16 frames from WAL file /data/system/locksettings.db-wal
09-23 12:16:12.617 1232-1232/system_process E/LockSettingsStorage﹕ Cannot read file java.io.FileNotFoundException: /data/system/password.key: open failed: ENOENT (No such file or directory)
09-23 12:16:12.617 1232-1232/system_process E/LockSettingsStorage﹕ Cannot read file java.io.FileNotFoundException: /data/system/gesture.key: open failed: ENOENT (No such file or directory)
09-23 12:16:13.281 1232-1312/system_process E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:13.282 1232-1312/system_process E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:13.299 1232-1232/system_process E/InputMethodManagerService﹕ Ignoring setImeWindowStatus due to an invalid token. uid:1000 token:null
09-23 12:16:13.422 1380-1387/com.android.inputmethod.latin E/art﹕ Failed sending reply to debugger: Broken pipe
09-23 12:16:13.450 943-1399/? E/WVMExtractor﹕ Failed to open libwvm.so: dlopen failed: library "libwvm.so" not found
09-23 12:16:14.016 1232-1232/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:14.017 1232-1232/system_process E/GpsLocationProvider﹕ no GPS configuration interface in configuraiton_update
09-23 12:16:14.084 1232-1232/system_process E/FlpHardwareProvider﹕ Error hw_get_module 'flp': -2
09-23 12:16:14.085 1232-1232/system_process E/LocationManagerService﹕ FLP HAL not supported
09-23 12:16:14.087 1232-1232/system_process E/ActivityRecognitionHardware﹕ Error hw_get_module: -2
09-23 12:16:14.087 1232-1232/system_process E/LocationManagerService﹕ Hardware Activity-Recognition not supported.
09-23 12:16:14.416 1232-1249/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:14.751 1461-1480/android.process.media E/art﹕ Failed writing handshake bytes (-1 of 14): Broken pipe
09-23 12:16:16.078 1461-1461/android.process.media E/SQLiteLog﹕ (283) recovered 94 frames from WAL file /data/data/com.android.providers.media/databases/external.db-wal
09-23 12:16:16.416 1232-1232/system_process E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:16.497 1232-1232/system_process E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:16.855 1630-1637/? E/art﹕ Failed writing handshake bytes (-1 of 14): Broken pipe
09-23 12:16:18.931 1516-1701/com.android.phone E/DcSwitchStateMachine-0﹕ DctController is not ready
09-23 12:16:19.104 1232-1304/system_process E/ConnectivityService﹕ Failed to find Messenger in unregisterNetworkFactory
09-23 12:16:19.179 1516-1516/com.android.phone E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:19.476 1344-1344/com.android.systemui E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:25.373 1344-1344/com.android.systemui E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:30.375 932-932/? E/EGL_emulation﹕ tid 932: eglCreateSyncKHR(1237): error 0x3004 (EGL_BAD_ATTRIBUTE)
09-23 12:16:36.201 1826-1859/com.google.process.gapps E/Backup﹕ [LegacyBackupAccountManager] Fail to get legacy transport context.
android.content.pm.PackageManager$NameNotFoundException: Application package com.google.android.backup not found
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2172)
at android.app.ContextImpl.createPackageContext(ContextImpl.java:2148)
at android.content.ContextWrapper.createPackageContext(ContextWrapper.java:671)
at com.google.android.gms.backup.an.<init>(SourceFile:47)
at com.google.android.gms.backup.BackupTransportMigratorService.f(SourceFile:248)
at com.google.android.gms.backup.BackupTransportMigratorService.b(SourceFile:196)
at com.google.android.gms.backup.BackupTransportMigratorService.onHandleIntent(SourceFile:131)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)
09-23 12:16:36.616 1741-1857/com.google.process.location E/Backup﹕ [LegacyBackupAccountManager] Fail to get legacy transport context.
android.content.pm.PackageManager$NameNotFoundException: Application package com.google.android.backup not found
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2172)
at android.app.ContextImpl.createPackageContext(ContextImpl.java:2148)
at android.content.ContextWrapper.createPackageContext(ContextWrapper.java:671)
at com.google.android.gms.backup.an.<init>(SourceFile:47)
at com.google.android.gms.backup.BackupTransportMigratorService.f(SourceFile:248)
at com.google.android.gms.backup.BackupTransportMigratorService.d(SourceFile:31)
at com.google.android.gms.backup.y.a(SourceFile:97)
at com.google.android.gms.backup.y.doInBackground(SourceFile:93)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
09-23 12:16:37.449 1878-1878/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
09-23 12:16:37.449 1878-1878/? E/android.os.Debug﹕ failed to load memtrack module: -2
09-23 12:16:37.667 1232-1232/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:37.667 1232-1232/system_process E/GpsLocationProvider﹕ no GPS configuration interface in configuraiton_update
09-23 12:16:37.709 1232-1232/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:37.709 1232-1232/system_process E/GpsLocationProvider﹕ no GPS configuration interface in configuraiton_update
09-23 12:16:38.219 1232-1232/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:38.219 1232-1232/system_process E/GpsLocationProvider﹕ no GPS configuration interface in configuraiton_update
09-23 12:16:38.529 1232-1304/system_process E/ConnectivityService﹕ Exception in setupDataActivityTracking java.lang.IllegalStateException: command '14 idletimer add eth0 5 0' failed with '400 14 Failed to add interface'
09-23 12:16:38.571 1826-1916/com.google.process.gapps E/Backup﹕ [LegacyBackupAccountManager] Fail to get legacy transport context.
android.content.pm.PackageManager$NameNotFoundException: Application package com.google.android.backup not found
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2172)
at android.app.ContextImpl.createPackageContext(ContextImpl.java:2148)
at android.content.ContextWrapper.createPackageContext(ContextWrapper.java:671)
at com.google.android.gms.backup.an.<init>(SourceFile:47)
at com.google.android.gms.backup.a.a(SourceFile:66)
at com.google.android.gms.backup.c.a(SourceFile:40)
at com.google.android.gms.backup.b.a(SourceFile:69)
at com.google.android.gms.backup.b.a(SourceFile:40)
at com.google.android.gms.backup.BackupAccountNotifierService.onHandleIntent(SourceFile:76)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)
09-23 12:16:38.577 1826-1916/com.google.process.gapps E/Backup﹕ [LegacyBackupAccountManager] Fail to get legacy transport context.
android.content.pm.PackageManager$NameNotFoundException: Application package com.google.android.backup not found
at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2172)
at android.app.ContextImpl.createPackageContext(ContextImpl.java:2148)
at android.content.ContextWrapper.createPackageContext(ContextWrapper.java:671)
at com.google.android.gms.backup.an.<init>(SourceFile:47)
at com.google.android.gms.backup.a.a(SourceFile:66)
at com.google.android.gms.backup.c.a(SourceFile:40)
at com.google.android.gms.backup.b.a(SourceFile:69)
at com.google.android.gms.backup.b.a(SourceFile:40)
at com.google.android.gms.backup.BackupAccountNotifierService.onHandleIntent(SourceFile:76)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.os.HandlerThread.run(HandlerThread.java:61)
09-23 12:16:38.741 1232-1249/system_process E/GpsLocationProvider﹕ no AGPS interface in set_agps_server
09-23 12:16:38.755 1232-1249/system_process E/GpsLocationProvider﹕ no GPS configuration interface in configuraiton_update
09-23 12:16:39.632 1960-1985/? E/SQLiteLog﹕ (284) automatic index on assetrefs(dataitems_id)
09-23 12:16:43.705 1999-1999/com.google.android.apps.maps E/BluetoothAdapter﹕ Bluetooth binder is null
09-23 12:16:44.043 2058-2065/com.android.deskclock E/art﹕ Failed writing handshake bytes (-1 of 14): Broken pipe
09-23 12:16:45.284 1826-1840/com.google.process.gapps E/SQLiteLog﹕ (283) recovered 6 frames from WAL file /data/data/com.google.android.gms/databases/playlog.db-wal
09-23 12:16:45.767 2136-2143/com.google.android.gms.unstable E/art﹕ Failed sending reply to debugger: Broken pipe
09-23 12:16:45.853 943-1230/? E/Drm﹕ Failed to find drm plugin
09-23 12:16:47.046 2191-2191/? E/memtrack﹕ Couldn't load memtrack module (No such file or directory)
09-23 12:16:47.046 2191-2191/? E/android.os.Debug﹕ failed to load memtrack module: -2
09-23 12:16:47.129 2191-2201/? E/art﹕ Thread attaching while runtime is shutting down: Binder_1
09-23 12:16:47.244 2204-2204/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: org.cade.codigos, PID: 2204
java.lang.RuntimeException: Unable to pause activity {org.cade.codigos/org.cade.codigos.ui.activities.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.cade.codigos.ui.components.CustomWebView.getUrl()' on a null object reference
感谢。
答案 0 :(得分：3)
Logcat显示设备内运行的所有应用程序/进程的日志。
使用TAG查找应用程序的日志。
Log.d("TAG","your custom message");
接下来在android studio中，在TAG标签中的"Log Level:"消息的搜索字段中输入您的"Android"名称。
您将获得特定于您的应用程序的日志。
否则只需搜索应用程序包名称。