在4.2.2及更高版本的操作系统中获取java.lang.NoSuchMethodError:android.os.FileUtils.getFatVolumeId

Question

我在尝试获取SD卡ID时面临服务onCreate()的问题.使用来自src-external/android-core的android.os包的FileUtils类.

mCardId =
  FileUtils.getFatVolumeId(Environment.getExternalStorageDirectory().getPath());

崩溃日志:

12-31 19:55:25.804: E/AndroidRuntime(1235):
java.lang.NoSuchMethodError: android.os.FileUtils.getFatVolumeId 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
cloudtv.android.cs.service.MediaPlaybackService.onCreate(MediaPlaybackService.java:198)
12-31 19:55:25.804: E/AndroidRuntime(1235):     at
android.app.ActivityThread.handleCreateService(ActivityThread.java:2572)
12-31 19:55:25.804: E/AndroidRuntime(1235):     at
android.app.ActivityThread.access$1800(ActivityThread.java:135) 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
12-31 19:55:25.804: E/AndroidRuntime(1235):     at
android.os.Handler.dispatchMessage(Handler.java:102) 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
android.os.Looper.loop(Looper.java:136) 12-31 19:55:25.804:
E/AndroidRuntime(1235):     at
android.app.ActivityThread.main(ActivityThread.java:5017) 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
java.lang.reflect.Method.invokeNative(Native Method) 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
java.lang.reflect.Method.invoke(Method.java:515) 12-31 19:55:25.804:
E/AndroidRuntime(1235):     at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-31 19:55:25.804: E/AndroidRuntime(1235):     at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 12-31
19:55:25.804: E/AndroidRuntime(1235):   at
dalvik.system.NativeStart.main(Native Method)

提前致谢!

Answer 1

FileUtils是一个平台内部类,带有注释@hide.你不应该使用它.