Question

嗨，我遇到了共享偏好和保存int数据的问题，我已经尝试了一切，但我无法弄明白。

我使用来自两个单独活动的getExtra将这些数据提取到主要活动，然后将这些变量添加到一起以给我一个总计。我试图做到这一点，以便在离开主要活动时，所有变量保持不变，并在其他两个活动发生变化时更新。

这是共享偏好的主要活动

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

    YearOneActivityButton();
    YearTwoActivityButton();

    SharedPreferences totalScorePref = getSharedPreferences("TotalScorePref", MODE_PRIVATE);
    scoreTotal = totalScorePref.getInt("TotalScoreY1", 0);

    Intent totalGradeValueY1 = getIntent();
    Intent totalGradeValueY2 = getIntent();

    int year2Score = totalGradeValueY2.getIntExtra("totalYearValueY2", 0);
    int year1Score = totalGradeValueY1.getIntExtra("totalYearValueY1", 0);

    scoreTotal = year1Score + year2Score;

    numberScore = (TextView)findViewById(R.id.number_score_txt);
    numberScore.setText(String.valueOf(year1Score));

    numberScore1 = (TextView)findViewById(R.id.number_score_1_txt);
    numberScore1.setText(String.valueOf(year2Score));

    totalGradeTxt = (TextView)findViewById(R.id.total_grade_txt);
    totalGradeTxt.setText(String.valueOf(scoreTotal));

    Log.d("SCORETOTAL", String.valueOf(scoreTotal));

}

@Override
public void onPause(){
    int pTotalScore = scoreTotal;

    SharedPreferences totalScorePref = getSharedPreferences("TotalScorePref", 0);
    SharedPreferences.Editor editor = totalScorePref.edit();
    editor.putInt("TotalScoreY1", pTotalScore);

    editor.commit();

    super.onPause();
}

}

这就是我传递数据的方式

public void SubmitMainActivity() {
    ButtonSubmit = (Button) findViewById(R.id.button_submit);
    ButtonSubmit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            int totalGradeValueY1 = totalAllSpinnerValuesY1;
            Intent year1ScoreIntent = new Intent(YearOneActivity.this, MainActivity.class);
            year1ScoreIntent.putExtra("totalYearValueY1", totalGradeValueY1);
            startActivity(year1ScoreIntent);

        }
    });
}

Answer 1

嗨，请尝试这样

SharedPreferences topic = getSharedPreferences("topicfun", MODE_PRIVATE);
SharedPreferences.Editor topiccom = topic.edit();
topiccom.putInt("topicname",10);
topiccom.commit();

Answer 2

您可以在计算 totalGradeTxt 后添加以下代码：

SharedPreferences totalScorePref = getSharedPreferences("TotalScorePref", 
                                                    MODE_PRIVATE);
 SharedPreferences.Editor editor = totalScorePref
                                          .edit()
                                          .putInt("TotalScoreY1",pTotalScore)
                                          .apply();

注意：我使用了apply（）而不是commit（）

麻烦共享首选项，保存int变量

2 个答案: