困惑为什么会发生这些错误,以及它们的意思？

Question

我正在DBFlow试图学习框架的Android应用程序,我开始得到错误,虽然我不确定它们是否相关DBFlow.

这是错误消息:

01-12 06:49:43.817 1294-1310/? E/BluetoothAdapter: Bluetooth binder is null
01-12 06:49:43.818 1294-1310/? E/KernelCpuSpeedReader: Failed to read cpu-freq
                                                       java.io.FileNotFoundException: /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state: open failed: ENOENT (No such file or directory)
                                                           at libcore.io.IoBridge.open(IoBridge.java:452)
                                                           at java.io.FileInputStream.<init>(FileInputStream.java:76)
                                                           at java.io.FileInputStream.<init>(FileInputStream.java:103)
                                                           at java.io.FileReader.<init>(FileReader.java:66)
                                                           at com.android.internal.os.KernelCpuSpeedReader.readDelta(KernelCpuSpeedReader.java:49)
                                                           at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8002)
                                                           at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366)
                                                           at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125)
                                                           at android.os.Handler.dispatchMessage(Handler.java:102)
                                                           at android.os.Looper.loop(Looper.java:148)
                                                           at android.os.HandlerThread.run(HandlerThread.java:61)
                                                           at com.android.server.ServiceThread.run(ServiceThread.java:46)
                                                        Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
                                                           at libcore.io.Posix.open(Native Method)
                                                           at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
                                                           at libcore.io.IoBridge.open(IoBridge.java:438)
                                                           at java.io.FileInputStream.<init>(FileInputStream.java:76) 
                                                           at java.io.FileInputStream.<init>(FileInputStream.java:103) 
                                                           at java.io.FileReader.<init>(FileReader.java:66) 
                                                           at com.android.internal.os.KernelCpuSpeedReader.readDelta(KernelCpuSpeedReader.java:49) 
                                                           at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8002) 
                                                           at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366) 
                                                           at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125) 
                                                           at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                           at android.os.Looper.loop(Looper.java:148) 
                                                           at android.os.HandlerThread.run(HandlerThread.java:61) 
                                                           at com.android.server.ServiceThread.run(ServiceThread.java:46) 
01-12 06:49:43.818 1294-1310/? E/KernelUidCpuTimeReader: Failed to read uid_cputime
                                                         java.io.FileNotFoundException: /proc/uid_cputime/show_uid_stat: open failed: ENOENT (No such file or directory)
                                                             at libcore.io.IoBridge.open(IoBridge.java:452)
                                                             at java.io.FileInputStream.<init>(FileInputStream.java:76)
                                                             at java.io.FileInputStream.<init>(FileInputStream.java:103)
                                                             at java.io.FileReader.<init>(FileReader.java:66)
                                                             at com.android.internal.os.KernelUidCpuTimeReader.readDelta(KernelUidCpuTimeReader.java:71)
                                                             at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8031)
                                                             at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366)
                                                             at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125)
                                                             at android.os.Handler.dispatchMessage(Handler.java:102)
                                                             at android.os.Looper.loop(Looper.java:148)
                                                             at android.os.HandlerThread.run(HandlerThread.java:61)
                                                             at com.android.server.ServiceThread.run(ServiceThread.java:46)
                                                          Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
                                                             at libcore.io.Posix.open(Native Method)
                                                             at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
                                                             at libcore.io.IoBridge.open(IoBridge.java:438)
                                                             at java.io.FileInputStream.<init>(FileInputStream.java:76) 
                                                             at java.io.FileInputStream.<init>(FileInputStream.java:103) 
                                                             at java.io.FileReader.<init>(FileReader.java:66) 
                                                             at com.android.internal.os.KernelUidCpuTimeReader.readDelta(KernelUidCpuTimeReader.java:71) 
                                                             at com.android.internal.os.BatteryStatsImpl.updateCpuTimeLocked(BatteryStatsImpl.java:8031) 
                                                             at com.android.server.am.BatteryStatsService.updateExternalStats(BatteryStatsService.java:1366) 
                                                             at com.android.server.am.BatteryStatsService$BatteryStatsHandler.handleMessage(BatteryStatsService.java:125) 
                                                             at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                             at android.os.Looper.loop(Looper.java:148) 
                                                             at android.os.HandlerThread.run(HandlerThread.java:61) 
                                                             at com.android.server.ServiceThread.run(ServiceThread.java:46)

我对Android开发很陌生,并且混淆了它们发生的原因.它不会崩溃我的应用程序,并且似乎不是每次都发生.

顺便说一下,我正在使用Nexus 5 Emulator来运行它,所以它可能与此相关吗？通常错误很糟糕,所以我认为这是一件值得关注的事情,不管它是否会影响应用......？

Answer 1

您指的是 DBFlow 框架。DBFlow 可能只是一个与数据库交互的库。现在真正的问题是您是否知道您的应用程序是否有权读取每个文件？您在命令行与应用程序中看到的内容并不相同。我相信你以 root 身份运行的模拟器。至于你的应用程序，你不是 root。尝试通过文件 API 检查您的应用对该文件拥有哪些权限