Aggiunta di pulsanti a livello di codice a un frammento

Question

Sto tentando di aggiungere a livello di codice pulsanti immagine al frammento che fa parte di un viewpager. Ho provato diversi codici, ma non compare alcun pulsante anche se Eclipse non restituisce alcun errore.

Ho trovato una domanda simile here ma le risposte non mi hanno aiutato a far apparire i miei pulsanti.

Ecco il mio codice.

public class ViewPagerFragment extends Fragment { 

private ViewPagerActivity mViewPagerActivity; 
private String mId; 

public ViewPagerFragment(String id) { 
    mId = id; 
} 

@Override 
public void onAttach(Activity activity) { 
    if (activity instanceof ViewPagerActivity) { 
     mViewPagerActivity = (ViewPagerActivity)activity; 
    } 
    super.onAttach(activity); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.fragment, container, false); 

    int[] image_array = { 
      R.drawable.elebutton, 
      R.drawable.right, 
      R.drawable.middle, 
      }; 

    for (int i =0;i<image_array.length;i++){ 
      ImageButton b1 = new ImageButton(getActivity()); 
      b1.setId(100 + i); 
      b1.setImageResource(image_array[i]); 

      RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
      if (i > 0) { 
       lp.addRule(RelativeLayout.BELOW, b1.getId() - 1); 
      } 
      b1.setLayoutParams(lp); 

      ImageHolder ih = new ImageHolder(getActivity()); 
      ih.addView(b1); 


    } 

    return v; 

} 
public class ImageHolder extends FrameLayout { 

    public ImageHolder(Context context) { 
     super(context); 
     initView(context); 
    } 

    public ImageHolder(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     initView(context); 
    } 

    public ImageHolder(Context context, AttributeSet attrs, int defStyle) { 
     super(context, attrs, defStyle); 
     initView(context); 
    } 

    private void initView(Context context){ 
     View.inflate(context, R.layout.fragment, this); 
    } 

    @Override 
    protected void onLayout(boolean changed, int l, int t, int r, int b) { 
     // TODO Auto-generated method stub 
     for(int i = 0 ; i < getChildCount() ; i++){ 
      getChildAt(i).layout(l, t, r, b); 
     } 
    } 

} 

Answer 1

Sembra che si stia creando il numero di immagini, aggiungendo ciascuna di esse a un imageholder. Tuttavia, non ho visto alcuna parte in cui effettivamente si uniscono gli imageholders al layout principale. Quindi, in pratica, questi sono creati ma non aggiunti ovunque. Supponiamo che il tuo file .layout.fragment abbia solo un FrameLayout con id frameLayout1. Di seguito sarebbe il mio suggerimento:

public class ViewPagerFragment extends Fragment { 

private ViewPagerActivity mViewPagerActivity; 
private String mId; 

public ViewPagerFragment(String id) { 
    mId = id; 
} 

@Override 
public void onAttach(Activity activity) { 
    if (activity instanceof ViewPagerActivity) { 
     mViewPagerActivity = (ViewPagerActivity)activity; 
    } 
    super.onAttach(activity); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    return inflater.inflate(R.layout.fragment, container, false); 
} 
// IMPORTANT PART! Here we will add images after fragment is inflated and instantiated 
@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    // Get the root layout of fragment, we called it frameLayout1 
    FrameLayout fl = (FrameLayout)(this.getActivity.findViewById(R.id.frameLayout1)); 
    int[] image_array = { 
      R.drawable.elebutton, 
      R.drawable.right, 
      R.drawable.middle, 
      }; 

    for (int i =0;i<image_array.length;i++){ 
      ImageButton b1 = new ImageButton(getActivity()); 
      b1.setId(100 + i); 
      b1.setImageResource(image_array[i]); 

      RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
      if (i > 0) { 
       lp.addRule(RelativeLayout.BELOW, b1.getId() - 1); 
      } 
      b1.setLayoutParams(lp); 

      ImageHolder ih = new ImageHolder(getActivity()); 
      ih.addView(b1); 
      fl.addView(ih); 
    } 
} 
// End of important part 
public class ImageHolder extends FrameLayout {... 
}