java.io.InvalidClassException：尝试从高速缓存存储中读取目标时没有有效的构造函数

Question

我有一个项目，我正在其中写入文件对象，然后尝试将保存在filecahce中的文件对象读入LinkedBlockingQueue

下面是我用来打开文件并读取它的功能。但它给出以下异常。请帮助

public static obInputStream getObject(Context context, String fileName) {

        ObjectInputStream inputstreamobject= null;
        try
        {
            Log.d(TAG, "Trying to read file: " + fileName);
            ois = new ObjectInputStream(context.openFileInput(fileName));

        }
        catch (FileNotFoundException e)
        {
            Log.d(TAG, "FileNotFoundException for file: " + fileName);
            e.printStackTrace();
        } 
        catch (StreamCorruptedException e) 
        {
            Log.d(TAG, "StreamCorruptedException for file: " + fileName);
            e.printStackTrace();
        } 
        catch (IOException e) 
        {
            Log.d(TAG, "IOException for file: " + fileName);
            e.printStackTrace();
        }
        catch ( Exception e)
        {
            Log.d(TAG, "Exception for file: " + fileName);
            e.printStackTrace();
        }

        return ois;
    }



 W/System.err: java.io.InvalidClassException: com.sampleproject.SyncClient; no valid constructor
    W/System.err:     at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:147)
    W/System.err:     at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:757)
    W/System.err:     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1773)
    W/System.err:     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
    W/System.err:     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1992)
    W/System.err:     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1916)
    W/System.err:     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799)
    W/System.err:     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
    W/System.err:     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
    W/System.err:     at java.util.concurrent.LinkedBlockingQueue.readObject(LinkedBlockingQueue.java:980)
    W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
    W/System.err:     at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1006)
    W/System.err:     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1894)
    W/System.err:     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1799)
    W/System.err:     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
    W/System.err:     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
            at com.sampleproject.initOfflineMsgQueue(smpleprjct.java:341)
    W/System.err:     at com.sampleproject.onCreate(smpleprjct.java:327)
    W/System.err:     at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1032)
    W/System.err:     at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5876)
    W/System.err:     at android.app.ActivityThread.-wrap3(ActivityThread.java)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1699)
    W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)
    W/System.err:     at android.os.Looper.loop(Looper.java:154)
    W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6682)
            at java.lang.reflect.Method.invoke(Native Method)
    W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
    W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)