Description
报错原因： ClassicsHeader类内236行调用了getSharedPreferences，应该改为在子线程调用。
报错信息：
java.lang.RuntimeException: StrictMode ThreadPolicy violation
at android.os.StrictMode$AndroidBlockGuardPolicy.onThreadPolicyViolation(StrictMode.java:1875)
at android.os.StrictMode$AndroidBlockGuardPolicy.lambda$handleViolationWithTimingAttempt$0$android-os-StrictMode$AndroidBlockGuardPolicy(StrictMode.java:1789)
at android.os.StrictMode$AndroidBlockGuardPolicy$$ExternalSyntheticLambda1.run(Unknown Source:6)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Caused by: android.os.strictmode.DiskReadViolation
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1658)
at libcore.io.BlockGuardOs.access(BlockGuardOs.java:74)
at libcore.io.ForwardingOs.access(ForwardingOs.java:128)
at android.app.ActivityThread$AndroidOs.access(ActivityThread.java:7775)
at java.io.UnixFileSystem.checkAccess(UnixFileSystem.java:332)
at java.io.File.exists(File.java:829)
at android.app.ContextImpl.getDataDir(ContextImpl.java:2962)
at android.app.ContextImpl.getPreferencesDir(ContextImpl.java:704)
at android.app.ContextImpl.getSharedPreferencesPath(ContextImpl.java:931)
at android.app.ContextImpl.getSharedPreferences(ContextImpl.java:553)
at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:217)
at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:217)
at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:217)
at com.scwang.smart.refresh.header.ClassicsHeader.(ClassicsHeader.java:236)
at com.scwang.smart.refresh.header.ClassicsHeader.(ClassicsHeader.java:76)