字节到字符串android

Question

所以我使用文件来保存我的程序的一些分数，但问题是我不能只是打印它们。我tryed几件事情，但我没有找到合适的人的是我的代码：

try{ 
     String FILENAME = "FrogScoreFile"; 
     FileInputStream fos = openFileInput(FILENAME); 
     byte[] b = new byte[1]; 
     fos.read(b); 
     fos.close(); 
     String score= String b; 
     game5HighScore.setText(b); 
     }catch (java.io.FileNotFoundException e) { 
     } catch (IOException e) { 
       e.printStackTrace(); 
    } 

Answer 1

您可以通过创建new string对象转换Byte array为字符串。

byte[] b = new byte[1]; 
fos.read(b); 
fos.close(); 
String message = new String(b); 

Answer 2

try{ 
     String FILENAME = "FrogScoreFile"; 
     FileInputStream fos = openFileInput(FILENAME); 
     BufferedReader br = new BufferedReader(new InputStreamReader(fos)); 
     String yourText = br.readLine(); 
     br.close(); 
     game5HighScore.setText(yourText); 
    }catch (java.io.FileNotFoundException e) { 
    } catch (IOException e) { 
      e.printStackTrace(); 
} 

的方式。为什么不用SharedPreferences或SQLite数据库保存你的分数？

SharedPrefrences Guide.

public static void saveScore(Context context) { 
    final SharedPreferences.Editor editor = context.getSharedPreferences(
      "settings", Context.MODE_PRIVATE).edit(); 
    editor.putInt("score", 100); 
    editor.commit(); 
} 

public static int readScore(Context context) { 
    final SharedPreferences sp = context.getSharedPreferences("settings", 
      Context.MODE_PRIVATE); 
    return sp.getInt("score", 0); 
}