Question

 

BaseActivity에서 Fragment 값전달하면서 메소드 실행하려면 어떻게 해야할까요?

특성상 화면전환이 없는 부분이 인데.. 나름대로 구글링을 했지만 답이 안나와서 여쭈어봅니다.

updateDisplay()메소드를 실행시켜 달력에 사용자가 입력한 값을 Fragment로 넘기고 Fragment에 있는 메소드를 실행하려고 하는데

 

자꾸 NullpointerException오류가 뜹니다. 어떻게 해야 할까요?

 

 

 extends BaseActivity {

private FragmentAdapter mAdapter;

   private ViewPager mPager;

   private TabPageIndicator mIndicator;

    private static final String[] CONTENT = new String[] {  "1","2","3","4" };

    private Button backBtn,wallBtn;

    DatePickerDialog datePickerDialog;

OnDateSetListener onDateSetListener;

private DatePicker datePicker;

    

private int mYear;

private int mDay;

private int mMonth;

@Override

public void onCreate(Bundle savedInstanceState) {

requestWindowFeature(Window.FEATURE_NO_TITLE);

    super.onCreate(savedInstanceState);

setContentView(R.layout.activity_setting_pouch);

}

 

Comments

//Instantiating the adapter
Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);
       
       

    wallBtn= (Button)findViewById(R.id.wallBtn);
    wallBtn.setVisibility(View.INVISIBLE);
    wallBtn.setOnClickListener(new OnClickListener() {



@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog(0);
updateDisplay();

}
});
   

mAdapter = new FragmentAdapter(getSupportFragmentManager());


    //instantiate the Views
    mPager = (ViewPager)findViewById(R.id.pager);
    mPager.setAdapter(mAdapter);
    
    mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
    mIndicator.setViewPager(mPager);
    final float density = getResources().getDisplayMetrics().density;
   
    mIndicator.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageSelected(int position) {
            //Toast.makeText(SettingPouchActivity.this, "Changed to page " + position, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        }

        @Override
        public void onPageScrollStateChanged(int state) {
        }
    });
  
private void updateDisplay()
{
    String str = (new StringBuilder().append(mYear).append("YEAR").append(mMonth+1).append("Month").append(mDay).append("DAY")).toString();
    Log.d("Log", str);
TwoFragmentActivity st = new TwoFragmentActivity();
//이다음을 모르겠습니다.;;

    
}

protected Dialog onCreateDialog(int id)
{
    return new DatePickerDialog(this, mDateSetListener, mYear, mMonth, mDay);
}

private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener()
                                       {
  public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth)
                                                                    {
                                                                        mYear = year;
                                                                        mMonth = monthOfYear;
                                                                        mDay = dayOfMonth;
                                                                        
                                                                        updateDisplay();
                                                                    }
                                                              };



 class FragmentAdapter extends FragmentPagerAdapter {

public FragmentAdapter(FragmentManager fm) {
        super(fm);
    }
  @Override
       public Fragment getItem(int position) {
    if (position == 0)
{
    wallBtn.setVisibility(View.INVISIBLE);
   
            return new FragmentViewerOne();
        }
else if (position == 1)
{

wallBtn.setVisibility(View.VISIBLE);
return new FragmentViewerTwo();

        }
else if (position == 2)
{
wallBtn.setVisibility(View.VISIBLE);
   
            return new FragmentViewerThree();
        }
else if (position == 3)
{
wallBtn.setVisibility(View.VISIBLE);
   
            return new FragmentViewerFour();
        }


           return new FragmentViewerFive();
       }

       @Override
       public CharSequence getPageTitle(int position) {
           return CONTENT[position % CONTENT.length];
       }

       @Override
       public int getCount() {
           return CONTENT.length;
       }
}
class TitleFragmentAdapter extends FragmentAdapter {
    public TitleFragmentAdapter(FragmentManager fm) {
        super(fm);
        
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return CONTENT[position % CONTENT.length];
    }
}

public class TwoFragmentActivity extends Fragment  {
public void test(){

TextView.setText(달력 문구가 들오게 하려면)?
     

}