Question

我是java和android的初学者，我得到以下内容：

“java.io.StreamCorruptedException：格式错误：0”

当我尝试回读对象时。但我只能在棒棒糖和棉花糖设备上得到它，当我在Nougat（7.1）运行时，我完全没有问题。有什么建议吗？

public class MainActivity extends AppCompatActivity {

public final String FILE_NAME = "FILE_NAME";
private List<Item>;
private ReadWriteFunctions readWriteFunctions = new ReadWriteFunctions();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final Bitmap defaultBitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.no_pic);

    //Read from internal storage
    items =readWriteFunctions.readObj(this,FILE_NAME);
    if (items == null){//if the file don't exist it returns null
        items = new ArrayList<>();
        items.add(new Item(false,"",defaultBitmap));
        Log.d("readObj", "Created new list");
    }

班级代码：

public class ReadWriteFunctions {


public ArrayList<Item> readObj(Context context, String fileName) { 
    ArrayList<Item> arrayList;
    try {
        FileInputStream fis = context.openFileInput(fileName);
        ObjectInputStream ois = new ObjectInputStream(fis);
        arrayList = (ArrayList<Item>) ois.readObject();
        ois.close();
        return arrayList;
    }catch (IOException | ClassNotFoundException e){
        e.printStackTrace();
        return null;
    }
}

public void writObj(Context context,String fileName,Object obj) {
    try {
        FileOutputStream fos = context.openFileOutput(fileName,Context.MODE_PRIVATE);
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(obj);
        oos.close();
        Log.d("writObj", "Saved");
    }catch (IOException e){
        e.printStackTrace();
        Log.d("writObj", "Save Fault");
    }

}

}

public class Item实现Serializable {

private boolean itemChecked;
private String itemText;
private transient Bitmap itemPicture;


public Item(Item item) {//Constructor that receive item
    this.setItemChecked(item.isItemChecked());
    this.setItemText(item.getItemText());
    this.setItemPicture(item.getItemPicture());

}

public Item(boolean itemChecked, String itemText, Bitmap itemPicture) {
    this.itemChecked = itemChecked;
    this.itemText = itemText;
    this.itemPicture = itemPicture;
}


public boolean isItemChecked() {
    return itemChecked;
}

public void setItemChecked(boolean itemChecked) {
    this.itemChecked = itemChecked;
}

public String getItemText() {
    return itemText;
}

public void setItemText(String itemText) {
    this.itemText = itemText;
}

public Bitmap getItemPicture() {
    return itemPicture;
}

public void setItemPicture(Bitmap itemPicture) {
    this.itemPicture = itemPicture;
}



private void writeObject(java.io.ObjectOutputStream out) throws IOException {

    itemPicture.compress(Bitmap.CompressFormat.PNG, 100, out);
    out.defaultWriteObject();

}

private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {

    itemPicture = BitmapFactory.decodeStream(in);
    in.defaultReadObject();

}

}

Answer 1

只是发布我为将来遇到同样问题的任何人解决问题的方式。

在：

public class Item implements Serializable

我改变了：这一行：

private boolean itemChecked;

到这一行：

private Boolean itemChecked;

因为我知道原语作为布尔值是Serializable所以我不知道为什么它有所作为，我也不明白为什么它对Nougat起作用并且不适用于棒棒糖＆amp;棉花糖。但它现在运作良好。如果有人知道为什么，我很高兴听到。

ObjectInputStream java.io.StreamCorruptedException：格式错误：0棒棒糖和marshmalow

1 个答案: