试图反序列化通过蓝牙发送的对象

Question

试图反序列化通过蓝牙从一台安卓设备发送到另一台的对象。

对象大小是 126 字节，我正在接受这个大小。但是我得到了一个找不到类的异常。

反序列化的代码为：

public static EcgDataPoint deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
        ByteArrayInputStream b = new ByteArrayInputStream(bytes);
        ObjectInputStream o = new ObjectInputStream(b);
        return (EcgDataPoint) o.readObject();
    }

错误：

tech.abhinavdas.bluetooth D/BluetoothReaderThread: Data type doesn't match
    java.lang.ClassNotFoundException: tech.abhinavdas.bluetoothpairingclient.models.EcgDataPoint
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:453)
        at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:628)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1615)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1520)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1776)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
        at tech.abhinavdas.bluetooth.models.EcgDataPoint.deserialize(EcgDataPoint.java:54)
        at tech.abhinavdas.bluetooth.threads.BluetoothReaderThread.deserializeAndRead(BluetoothReaderThread.java:47)
        at tech.abhinavdas.bluetooth.threads.BluetoothReaderThread.run(BluetoothReaderThread.java:38)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "tech.abhinavdas.bluetoothpairingclient.models.EcgDataPoint" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/tech.abhinavdas.bluetooth-EZqoTdreOfJT1jU4xbF9dg==/base.apk"],nativeLibraryDirectories=[/data/app/tech.abhinavdas.bluetooth-EZqoTdreOfJT1jU4xbF9dg==/lib/arm64, /system/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at java.lang.Class.classForName(Native Method) 
        at java.lang.Class.forName(Class.java:453) 
        at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:628) 
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1615) 
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1520) 
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1776) 
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353) 
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373) 
        at tech.abhinavdas.bluetooth.models.EcgDataPoint.deserialize(EcgDataPoint.java:54) 
        at tech.abhinavdas.bluetooth.threads.BluetoothReaderThread.deserializeAndRead(BluetoothReaderThread.java:47) 
        at tech.abhinavdas.bluetooth.threads.BluetoothReaderThread.run(BluetoothReaderThread.java:38) 

我错过了什么？

Answer 1

你有两种同名的类型：

tech.abhinavdas.bluetooth.models.EcgDataPoint

和

tech.abhinavdas.bluetoothpairingclient.models.EcgDataPoint

所以：在这行代码中：

return (EcgDataPoint) o.readObject();

确保您要投射的类型是 tech.abhinavdas.bluetoothpairingclient.models.EcgDataPoint。

另外，请仔细检查发送端的代码版本是否不匹配（这两个包的名称看起来非常相似）。