Question

我遇到了listview使用的问题，这个问题与jakewharton的Android-ViewPagerIndicator中的viewpager样式标签一起使用... github上的例子。

我正在为三个标签使用相同的lib，每个标签都有一个列表视图，其中相同的arraylist设置为适配器。

我正在使用3这种片段都工作正常但是因为我希望我的列表在所有其他片段中更新时，当我在其中任何一个中进行更改时，它不会反映这些更改。我想如果我在三个选项卡中的任何一个列表中检查了一个复选框（我正在更新db和我的arraylist中的值）其他两个listview里面的各个片段应该反映更改，请帮助我。请帮助我，任何帮助将不胜感激

class RingFragment extends Fragment
{
 public static RingFragment newInstance(Context c, ArrayList<Ringtones> ringList) 
 {
  RingFragment fragment = new RingFragment();
  cCntxt = c;
  return fragment;
 }
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle        
savedInstanceState)
 {
  rngAdapter = new RingAdapter(cCntxt, ringFragList);
  lstRingtones = new ListView(cCntxt);
  lstRingtones.setLayoutParams(new    LayoutParams(LayoutParams.FILL_PARENT, 
  LayoutParams.FILL_PARENT));
  lstRingtones.setAdapter(rngAdapter);
  LinearLayout layout = new LinearLayout(getActivity());
  layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,  
  LayoutParams.FILL_PARENT));
  layout.setGravity(Gravity.CENTER);
  layout.addView(lstRingtones);
  return layout;
 }
 public class RingAdapter extends BaseAdapter
 {
    ArrayList<Ringtones> arlstRingAdpter;
    Context adptrContext;
    public boolean noRing = false;
    public RingAdapter(Context c, ArrayList<Ringtones> adptrRngtones)
    {
        arlstRingAdpter = adptrRngtones;
        adptrContext = c;
    }       
   @Override
public int getCount() 
{
  return arlstRingAdpter.size();
}
@Override
public Object getItem(int position) 
{
 return position;
}
@Override
public long getItemId(int position) 
{
 return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) 
{
 View view = convertView;
 final Wrapper wrapper;
     if (view == null) 
 {
     view = (RelativeLayout)LayoutInflater.from(cCntxt).inflate(R.layout.cell_ringtone,     
      null);
 wrapper = new Wrapper(view);
 view.setTag(wrapper);
}
else 
{
 wrapper = (Wrapper) view.getTag();
}
 return view;
}
 }  
 }
 }

： - ＆gt;我调用这些片段的主要活动是

public class MainActivity extends FragmentActivity
 {
   ViewPager mPager;
   PageIndicator mIndicator;
MusicAdapter mAdapter;
RingtonesBL rngBL;
  @Override
  public void onCreate(Bundle savedInstanceState) 
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mAdapter = new MusicAdapter(getSupportFragmentManager());
    mPager = (ViewPager)findViewById(R.id.pager);
    mPager.setAdapter(mAdapter);
    mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
    mIndicator.setViewPager(mPager);
  }
class MusicAdapter extends RingtoneFragmentAdapter 
{
 public MusicAdapter(FragmentManager fm) 
 {
  super(fm);
 } 
 @Override
 public Fragment getItem(int position) 
 {
 if(position % CONTENT.length == 0)
 {
  return             
  RingFragment.newInstance(AppConstants.cAppContext,AppConstants.arlst_RingAll);
 }
 else if(position % CONTENT.length == 1)
 {
  return RingFragment1.newInstance(AppConstants.cAppContext, 
  AppConstants.arlst_RingCart);
 }
 else
 {
  return RingFragment2.newInstance(AppConstants.cAppContext, 
  AppConstants.arlst_RingPurchased);
 }
 }
 public int getItemPosition(Object object) 
 {
  return POSITION_NONE;
 }
 @Override
 public int getCount() 
 {
   return CONTENT.length;
 }
  @Override
  public CharSequence getPageTitle(int position) 
  {
    return CONTENT[position % CONTENT.length].toUpperCase();
  }
 }
}

activity_main.xml只有

 <com.ringtone.TabPageIndicator
    android:id="@+id/indicator"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    />
<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_below="@+id/indicator"
    >
    </android.support.v4.view.ViewPager>

请告诉我如何在更改任何片段时通知其他片段列表视图。

Answer 1

请尝试从这些分支中做出一些事情：例如：

else 
{
 wrapper = (Wrapper) view.getTag();
}

wrapper.txtText.setText("Refreshed");

return view;
}

listview没有使用viewpager选项卡在片段中刷新

1 个答案: