我是Java和Android的初学者，我得到如下：
“java.io.streamcorruptedexception:格式错误：0”
当我试图读回那个物体时。
但我只在棒棒糖和棉花糖设备上得到它，当我在牛轧糖（7.1）上运行这个程序时，我一点问题都没有。
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");
}
类代码：
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");
}
}
}
公共类项实现可序列化{
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();
}
}
最佳答案
只是把我解决问题的方法发布给以后遇到同样问题的人。
在：
public class Item implements Serializable
我改了：这行：
private boolean itemChecked;
到这一行：
private Boolean itemChecked;
因为我知道布尔型的原语是可序列化的，所以我不知道它为什么会有不同，我也不明白为什么它对牛轧糖起作用，而对棒棒糖和棉花糖不起作用。
但现在效果不错。
如果有人知道为什么，我很高兴听到。