Android Quiz Score Point

I have sought for this for a long time with no chance, I will now have the permission to ask this question. I am trying to developing a quiz in Android whereas I have a problem whe

Solution 1:

First Create an Application Class

class MyApplication extends Application{
 public int currentScore;
 private SharedPreferences sp;

    @Override
public void onCreate()
{
    super.onCreate();
    sp = getSharedPreferences(getResources().getString(R.string.app_name),
            MODE_PRIVATE);
        currentScore = sp.getInt("score",0);

}

    public void updateScore(int increment)
    {
       currentScore = currentScore+increment;
       sp.edit().putInt("score", currentScore).commit();
    }
 }

Now On MainActivity add the following code -

 class MainActivity extends Activity{
 public MyApplication application;
     @Override
    protected void onCreate(Bundle arg0)
    {
       application = (MyApplication) getApplication();

        // to get current score 
       int currentScore = application.currentScore;
       // to update currentScore
        application.updateScore(1);
    }
 }

Same On Now On Question002 add the following code -

 class Question002 extends Activity{
 public MyApplication application;
     @Override
    protected void onCreate(Bundle arg0)
    {
       application = (MyApplication) getApplication();

        // to get current score 
       int currentScore = application.currentScore;
       // to update currentScore
        application.updateScore(1);
    }
 }

now finaly in the add android:name property to the application tag -

  <application
    android:name="yourpackagename.MyApplication"
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

Your score is stored in MyApplication class. All the Activity can access it by via getApplication() method after onCreate() has called. No need to pass score via intent. Score also saved in sharedprefernce and loaded from it too.

Solution 2:

you can use sharedpreference to maintain score but if you want to use main activity , then declare currentpoint as public static variable and then increment it like

MainActivity.currentPoint++;

Solution 3:

if(your answer correct)
{
currentPoint = currentPoint+1;

Intent myIntent = new Intent(MainActivity.this, Question002.class);
myIntent.putExtra("result", currentPoint );
startActivity(myIntent);


}

In class Question002

Intent mIntent = getIntent();
int intValue = mIntent.getIntExtra("result", 0);