Android 读取U盘文件 NullPointer Attempt to get length of null array 安卓如何读取u盘 Android U盘读写要用到的三方库:https:///magnusja/libaums,使用方法地那就链接了解。 最近项目需要用到OTG功能,写了一个小demo,做为自己的笔记也供大家参考。 需要用到的权限: USB插拔广
Hello I'm having a problem with dates received from a web service. when I try to call toString: startDate.toString("EE dd, MMM: HH:mm") it throws this exception: java.lang.NullPointerException: Attempt to read from null array at org.joda...
*/publicclassContactimplementsParcelable{privateint phoneNumber;privateString name;privateString address;publicContact(int phoneNumber,String name,String address){this.phoneNumber=phoneNumber;this.name=name;this.address=address;}@OverridepublicintdescribeContents(){return0;}@OverridepublicvoidwriteToParcel(Parcel...
——> FileFetcher::OnReadDoneCallback (1)如果全部写入(即bytes_read为0)则调用TransferComplete函数 (2)否则调用ReceivedBytes函数,并且叠加bytes_copied_变量已拷贝字节数 在调用该函数结束后,会继续调用FileFetcher::ScheduleRead函数 ——>android/system/update_engine/payload_consumer/update_attempter_android.cc...
Read and return a new Object array from the parcel at the current dataPosition(). Returns null if the previously written array was null. The given class loader will be used to load any enclosed Parcelables. This member is deprecated. Use the type-safer version #readArray(ClassLoader, Class...
ReadFixedArray ReadFloat ReadFloatArray ReadHashMap ReadInt ReadIntArray ReadInterfaceArray ReadInterfaceList ReadList ReadLong ReadLongArray ReadMap ReadParcelable ReadParcelableArray ReadParcelableCreator ReadParcelableList ReadPersistableBundle ReadSerializable ...
Creates a new JSONArray with values from the next array in the tokener. C# 复制 [Android.Runtime.Register(".ctor", "(Lorg/json/JSONTokener;)V", "")] public JSONArray(Org.Json.JSONTokener? readFrom); Parameters readFrom JSONTokener a tokener whose nextValue() method will yield a JS...
1Causedby: java.lang.NullPointerException: Attempt to invokevirtualmethod'android.content.pm.PackageManager android.content.Context.getPackageManager'onanullobjectreference 理由也很简单,此场景下你无法给 this.getPackageManager.getInstalledApplications(0); 赋予一个有效的 this(Context) 对象。
[android] URGENT -> Attempt to invoke interface method 'boolean com.swmansion.reanimated.layoutReanimation.NativeMethodsHolder.isLayoutAnimationEnabled()' on a null object reference #2702 Latroposclosed this as completedon Aug 4, 2023 piaskowyk commented on Aug 7, 2023 piaskowyk on Aug 7, 2023...
CreateStringArrayList CreateTypedArray CreateTypedArrayList CreateTypedArrayMap CreateTypedSparseArray DataAvail DataCapacity DataPosition DataSize EnforceInterface EnforceNoDataAvail InvokeHasFileDescriptors Marshall Obter ReadArray ReadArrayList ReadBinderArray ReadBinderList ReadBlob ReadBoolean ReadBooleanArray ReadBu...