保存和恢复数据的问题

时间:2011-06-09 21:08:21

标签: android file save restore

退出活动时,我正在保存一些东西。 首先是对象,第二个是int值。

它可以保存,但是当我尝试回读时,在尝试获取第二项时会出现EOF异常。

    private void saveData(){
        FileOutputStream saveFile = null;
        try {
            saveFile = this.openFileOutput(STATE_SAVE_FILE_NAME, Context.MODE_PRIVATE);
            ObjectOutput output = new ObjectOutputStream(saveFile);
            output.writeObject(game); 
            output.write(ScoringForScoreloop.getScore());
            output.close();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        } 
        finally {
                try {
                    saveFile.close();
                } 
                catch (Exception ex) {
                    ex.printStackTrace();
                } 
        }

    } 

private void restoreData(){
        FileInputStream restoreFile = null;
        try {
                try {
                    restoreFile = this.openFileInput(STATE_SAVE_FILE_NAME);
                } 
                catch (FileNotFoundException e) {
                    inGame = false;
                    return;     // If no file then ok - we will start a new game
                }

                ObjectInput input = new ObjectInputStream(restoreFile);
                game = (GameControl) input.readObject();
                ScoringForScoreloop.setScore(input.readInt());
                inGame = (game!=null);
        } catch (Exception e) {
            inGame = false;
            return;     // If error then we will start a new game
        }
        finally {
                try {
                    restoreFile.close();
                    this.deleteFile(STATE_SAVE_FILE_NAME);   // delete it so we don't restore from it again
                } 
                catch (Exception   ex) {
                    inGame = false;
                    return;     // If error then we will start a new game
                }
        }

    }

1 个答案:

答案 0 :(得分:2)

我以前从未在Java中使用这些类,但我会冒险猜测。我怀疑问题是Java中的int和Integer之间的区别。

在编写代码中,您是否尝试过替换

output.write(ScoringForScoreloop.getScore());

output.writeInt(ScoringForScoreloop.getScore());

这样,在类型处理方面,你应该在读写方面保持对称。