的主要活动中的数据没有正确保存/负载SharedPreferences

Question

If you look through each picture, from left to right, you'll notice on the last picture on the right, the points for Quiz One goes to 0... this is my problem

这是我的工作，与Android Studio中的一个测验应用程序......我试图使用SharedPreferences，使用putInt和getInt方法将每个测验得分的值存入变量，存储在一个String名称下，然后onCreate的一部分是getInt使用putInt m方法中引用的字符串名称...主要活动应该在用户第一时加载所有0第一次打开应用程序...当用户完成测验时，积分将返回到主要活动，积分应保持在那里......如果用户继续前进，转到另一个屏幕，另一个应用程序，或完全关闭应用程序，每个测验得分应保持不变，但他们不：（

当前，主要活动上的每个测验按钮关闭主要活动（完成（）; ），并且每个测验的最后一个活动调用主要活动并通过积分评分...我还有每个测验按钮在主要活动关闭前调用onStop（）方法，并且onStop（）方法使用SharedPreferences.Editor和putInt方法在主要活动的每个点值的值...然后我有SharedPreferences和getInt方法朝着onCreate的开始...

所以基本上，我想要发生的是，每次用户点击测验按钮，使用putInt方法，使用字符串名称，以及我用于每个测验的积分的实际的int变量，以及当用户在完成测验后返回到主要活动时，应该保存每个测验得分的积分，用户已经得分的任何点都应该通过getInt方法自动加载...参见下面的图片，了解我的程序中的一些编码...让我知道是否有人需要看到更多的代码，我希望有人能帮助我！ :)

Different blocks of code, most important blocks of code that pertain or relate to the problem I'm having

我试过前面的人建议的，但它仍然没有工作......看到下面我的代码部分，让我知道什么需要固定：

//Get points from Quiz One 
     Bundle getFromQuizOne = getIntent().getExtras(); 
     if(getFromQuizOne != null) 
     { 
      //Get points from Quiz One 
      numberQuizOnePoints = getFromQuizOne.getInt("PointsFromAllQuizOne"); 

      SharedPreferences shareInt = getApplicationContext().getSharedPreferences(QUIZ, MODE_PRIVATE); 
      SharedPreferences.Editor editInt = shareInt.edit(); 

      //Save the value of points from Quiz One with SharedPreferences 
      editInt.putInt("quizOnePointsYeah", numberQuizOnePoints); 
      editInt.commit(); 

      //Get the value of points from all other quizzes with getInt from SharedPreferences 
      numberQuizTwoPoints = shareInt.getInt("quizTwoPointsYeah", 0); 
      numberQuizThreePoints = shareInt.getInt("quizThreePointsYeah", 0); 
      numberQuizFourPoints = shareInt.getInt("quizFourPointsYeah", 0); 
      numberQuizFivePoints = shareInt.getInt("quizFivePointsYeah", 0); 
      numberQuizSixPoints = shareInt.getInt("quizSixPointsYeah", 0); 
      numberQuizSevenPoints = shareInt.getInt("quizSevenPointsYeah", 0); 
      numberQuizEightPoints = shareInt.getInt("quizEightPointsYeah", 0); 
      numberQuizNinePoints = shareInt.getInt("quizNinePointsYeah", 0); 
      numberQuizTenPoints = shareInt.getInt("quizTenPointsYeah", 0); 

      //Sum up points from each quiz, and put sum in totalPoints variable 
      totalPoints = numberQuizOnePoints + numberQuizTwoPoints + numberQuizThreePoints 
        + numberQuizFourPoints + numberQuizFivePoints + numberQuizSixPoints 
        + numberQuizSevenPoints + numberQuizEightPoints + numberQuizNinePoints 
        + numberQuizTenPoints; 


      quizOnePointsText.setText(String.format("%d", numberQuizOnePoints)); 
      quizTwoPointsText.setText(String.format("%d", numberQuizTwoPoints)); 
      quizThreePointsText.setText(String.format("%d", numberQuizThreePoints)); 
      quizFourPointsText.setText(String.format("%d", numberQuizFourPoints)); 
      quizFivePointsText.setText(String.format("%d", numberQuizFivePoints)); 
      quizSixPointsText.setText(String.format("%d", numberQuizSixPoints)); 
      quizSevenPointsText.setText(String.format("%d", numberQuizSevenPoints)); 
      quizEightPointsText.setText(String.format("%d", numberQuizEightPoints)); 
      quizNinePointsText.setText(String.format("%d", numberQuizNinePoints)); 
      quizTenPointsText.setText(String.format("%d", numberQuizTenPoints)); 
      actualPointsText.setText(String.format("%d", totalPoints)); 
     }//end if 

这就是每个测验Bundle的样子，除了为相应的测验命名的变量和字符串名称之外......我开始想，也许这不是获取传递给int值的最佳方式主要活动从另一个活动，但我想不出另一种方式来做到这一点...在这种情况下，我试图保存麻木的价值erQuiz＃我马上从测验中获得的点数，并从所有其他int变量中获取点数的值，然后在应用程序的主屏幕上显示所有值...但这不起作用:(

这里是一个什么样的测验按钮setOnClickListener后面的代码看起来像一个例子：

//Directs user to Quiz One, first screen 
     quizOneButton.setOnClickListener(new View.OnClickListener() 
     { 
      @Override 
      public void onClick(View v) 
      { 
       //Subtract out any points that user already got for Quiz 1 from total... 
       //In case user wants to or has to re-take Quiz 1 
       totalPoints = totalPoints - numberQuizOnePoints; 

       //Subtract out any points that user already got for Quiz 1 from itself, equal 0 
       numberQuizOnePoints -= numberQuizOnePoints; 



       //Go to the Quiz One, first screen 

       Intent directToQuizOnePartOne = new Intent(); 
       directToQuizOnePartOne.setClass(getBaseContext(), QuizOnePartOne.class); 
       startActivity(directToQuizOnePartOne); 
       finish(); 
      }//end void onClick quizOne 
     });//end setOnClickListener quizOne 

而且这是代码看起来像一个给定测验的最后一个活动：（在这种情况下，最后活动对于测验1，正在通过的活动回到MainAcvitity：

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

public class QuizOnePartFour extends AppCompatActivity 
{ 
    //Create variables for button and TextViews 

    TextView totalPointsQuizOneTextView; 
    Button returnToMainOne; 
    int actualPointsAllQuizOne; 

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

     Bundle bundleFour = getIntent().getExtras(); 
     actualPointsAllQuizOne = bundleFour.getInt("CarryOverThreeQuizOne"); 

     //Assign variables to appropriate buttons and TextViews 

     totalPointsQuizOneTextView = (TextView) findViewById(R.id.txtTotalPointsQuizOne); 
     returnToMainOne = (Button) findViewById(R.id.btnReturnToMainOne); 

     totalPointsQuizOneTextView.setText(String.format("%d", actualPointsAllQuizOne)); 

     returnToMainOne.setOnClickListener(new View.OnClickListener() 
     { 
      @Override 
      public void onClick(View v) 
      { 
       //Return to main menu screen 

       Bundle bundleFive = new Bundle(); 
       bundleFive.putInt("PointsFromAllQuizOne", actualPointsAllQuizOne); 

       Intent directToMainMenuOne = new Intent(); 
       directToMainMenuOne.setClass(getBaseContext(), MainMenu.class); 
       directToMainMenuOne.putExtras(bundleFive); 
       startActivity(directToMainMenuOne); 
       finish(); 
      }//end void onClick returnToMainOne 
     });//end setOnClickListener returnToMainOne 
    }//end void onCreate QuizOnePartFour 
}//end class QuizOnePartFour 

Answer 1

不要手动呼叫onStop这些是您重写仅执行一些清理的特殊方法。

它是活动生命周期方法之一。您应该将该代码移至按钮单击事件。