Question

这很简单，我需要做的就是为游戏保存一个高分（整数）。我假设最简单的方法是将它存储在一个文本文件中，但我真的不知道如何去做。

Answer 1

如果您只需要存储一个整数，那么SharedPreferences最适合您使用：

//setting preferences
SharedPreferences prefs = this.getSharedPreferences("myPrefsKey", Context.MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putInt("key", score);
editor.commit();

获得偏好：

//getting preferences
SharedPreferences prefs = this.getSharedPreferences("myPrefsKey", Context.MODE_PRIVATE);
int score = prefs.getInt("key", 0); //0 is the default value

当然，用你的高分值的密钥替换"key"，用你的偏好的密钥替换"myPrefsKey"（这些可以是任何东西。将它们设置为可识别和唯一的东西是好的）。

Answer 2

使用shared preferences：

public class Calc extends Activity {
    public static final String PREFS_NAME = "MyPrefsFile";

    @Override
    protected void onCreate(Bundle state){
       super.onCreate(state);
       . . .

       // Restore preferences
       SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
       boolean silent = settings.getBoolean("silentMode", false);
       setSilent(silent);
    }

    @Override
    protected void onStop(){
       super.onStop();

      // We need an Editor object to make preference changes.
      // All objects are from android.context.Context
      SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
      SharedPreferences.Editor editor = settings.edit();
      editor.putBoolean("silentMode", mSilentMode);

      // Commit the edits!
      editor.commit();
    }
}

存储此类内容的最简单方法。

Answer 3

我认为this link会帮助你：

The SharedPreferences class provides a general framework that allows you to save and
retrieve persistent key-value pairs of primitive data types. You can use
SharedPreferences to save any primitive data: booleans, floats, ints, longs, and strings. 
This data will persist across user sessions (even if your application is killed).

User Preferences

Shared preferences are not strictly for saving "user preferences," such as what ringtone
a user has chosen. If you're interested in creating user preferences for your
application, see PreferenceActivity, which provides an Activity framework for you to 
create user preferences, which will be automatically persisted (using shared preferences).

To get a SharedPreferences object for your application, use one of two methods:

    getSharedPreferences() - Use this if you need multiple preferences files identified
by name, which you specify with the first parameter.
    getPreferences() - Use this if you need only one preferences file for your Activity.
Because this will be the only preferences file for your Activity, you don't supply a name.

To write values:

    Call edit() to get a SharedPreferences.Editor.
    Add values with methods such as putBoolean() and putString().
    Commit the new values with commit()

To read values, use SharedPreferences methods such as getBoolean() and getString().

正如我所看到的，保存高分的最佳方式是SharedPreferences。

Answer 4

public class HighScores extends Activity {

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

        //get text view
        TextView scoreView = (TextView)findViewById(R.id.high_scores_list);
        //get shared prefs
        SharedPreferences scorePrefs = getSharedPreferences(PlayGame.GAME_PREFS, 0);
        //get scores
        String[] savedScores = scorePrefs.getString("highScores", "").split("\\|");
        //build string
        StringBuilder scoreBuild = new StringBuilder("");
        for(String score : savedScores){
            scoreBuild.append(score+"\n");
        }
        //display scores
        scoreView.setText(scoreBuild.toString());
    }

}

需要为Android游戏保存高分

4 个答案: