Simple use of SharedPreferences

    SharedPreferences sharedPreferences=getSharedPreferences("day",MODE_WORLD_READABLE);
    //Get the object
    boolean day=sharedPreferences.getBoolean("day",true);
    if(day){ //The first time entering the stored value means entering the second jump Go to the page
        SharedPreferences.Editor editor=sharedPreferences.edit();
        editor.putBoolean("day",false);
        editor.commit();
    }else{
        startActivity(new Intent(MainActivity.this,Main2Activity.class));
        finish( );
    }