SharedPreferences Enregistrer la valeur de Int dans un TextView

Question

Je tente de sauvegarder la valeur d'un int affiché dans un TextView en utilisant SharedPreferences, cela ne peut pas fonctionner du tout. J'ai fait un simple petit exemple de code:

public class MainActivity extends Activity { 

Button search; 
TextView tvRing; 
int redRing; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    final SharedPreferences prefs = getSharedPreferences("sharedPreferences", Context.MODE_PRIVATE); 

    search = (Button) findViewById(R.id.radar); 
    tvRing = (TextView) findViewById(R.id.ring); 

    int someint = prefs.getInt("someint", 0); 
    tvRing.setText("Objects found : " + String.valueOf(someint)); 

    search.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      addRing(); 
      SharedPreferences.Editor editor = prefs.edit(); 
      editor.putInt("someint", redRing); 
      editor.commit(); 
     } 
    }); 
} 

public void addRing() { 
    redRing++; 
} 
} 

Merci à tous pour votre aide.

Answer 1

Je lui ai expliqué où je fait des changements

public class MainActivity extends Activity { 

    Button search; 
    TextView tvRing; 

    //Making sharedpreferences and integers global for ease of use 
    private SharedPreferences prefs; 
    private int redRing, someint; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     search = (Button) findViewById(R.id.radar); 
     tvRing = (TextView) findViewById(R.id.ring); 

     //Someint default value is 0 if not ever saved before 
     prefs = getSharedPreferences("sharedPreferences", Context.MODE_PRIVATE); 
     someint = prefs.getInt("someint", 0); 
     tvRing.setText("Objects found : " + String.valueOf(someint)); 

     search.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       //Load the lates someint in onclick 
       someint = prefs.getInt("someint", 0); 

       //redring is the dummy integer to increment someint 
       redRing=someint+1; 
       //Save the incremented value 
       SharedPreferences.Editor editor = prefs.edit(); 
       editor.putInt("someint", redRing); 
       editor.commit(); 

       //To show the latest number on the tv 
       lastNumber(); 
      } 
     }); 
    } 


    public void lastNumber() { 
     prefs = getSharedPreferences("sharedPreferences", Context.MODE_PRIVATE); 
     someint = prefs.getInt("someint", 0); 
     tvRing.setText("Objects found : " + String.valueOf(someint)); 
    } 
} 

Answer 2

Vous devez utiliser

SharedPreferences.Editor editor = prefs.edit(); 
     editor.putInt("someint", redRing); 
     editor.apply(); 

et vous n'utilisez "SomeInt", utilisez

tvRing.setText(String.valueOf(someint));