嗨,我正在使用 UsageStatsManager api 向用户显示一些使用列表。但我面临一些问题。我在许多设备中都遇到了这个错误,在某些设备中它工作正常。我仍在浏览这个问题。你们能帮我解决这个问题吗?
错误:
java.lang.NoClassDefFoundError: android.app.usage.UsageStatsManager
at com.yourapp.fragment.AppUsageStatisticsFragment.onViewCreated(AppUsageStatisticsFragment.java:64)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
at android.os.Handler.handleCallback(Handler.java:800)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5463)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:854)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:621)
at dalvik.system.NativeStart.main(Native Method)
我用过的代码:
private UsageStatsManager mUsageStatsManager;
//i am getting error at below line.
mUsageStatsManager = (UsageStatsManager) getActivity()
.getSystemService("usagestats"); //Context.USAGE_STATS_SERVICE
显现:
<uses-permission android:name="android.permission.PACKAGE_USAGE_STATS"
tools:ignore="ProtectedPermissions"/>
检查我的应用程序。