Android Volleyカスタムローダー

  /** * Returns a new instance of this fragment * */ public static IconsGridFragment newInstance(Icons icons) { IconsGridFragment fragment = new IconsGridFragment(); Bundle args = new Bundle(); args.putParcelable(ARG_ICONS, icons); fragment.setArguments(args); return fragment; } public IconsGridFragment() { } 

  private void closeOverlayDelay() { Handler handler = new Handler(); handler.postDelayed(new Runnable() { public void run() { closeOverlayFragment(); // Reset flag fo continue load after error gone Fragment fragment = getSupportFragmentManager(). findFragmentByTag(IconsGridFragment.class.getSimpleName()); if (fragment != null) ((IconsGridFragment)fragment).resetLoadingFlag(); } }, 5000); } @Override public void onLoadFinished(final Loader<DataHolder> loader, final DataHolder data) { VolleyError volleyError = data.getError(); if (volleyError != null) { if (DEBUG) Log.e(TAG, "volleyError message: " + volleyError.getMessage()); NetworkResponse networkResponse = volleyError.networkResponse; if (networkResponse != null && networkResponse.statusCode == 429) { // HTTP Status Code: 429 if (DEBUG) Log.e(TAG, "volleyError statusCode: " + networkResponse.statusCode); new Handler(Looper.getMainLooper()).post(new Runnable() { @Override public void run() { Fragment fragment = getSupportFragmentManager(). findFragmentByTag(OverlayMessageFragment.class.getSimpleName()); if(fragment == null) { Fragment overlayMessageFragment = OverlayMessageFragment.newInstance("Server Error 429. Too many requests. Try later"); FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.setCustomAnimations(R.anim.enter, R.anim.exit, R.anim.pop_enter, R.anim.pop_exit); ft.add(R.id.container, overlayMessageFragment, OverlayMessageFragment.class.getSimpleName()); ft.commit(); closeOverlayDelay(); } } }); return; } return; } ... 

  final int ICONS_HANDLER = 1; final int STILES_HANDLER = 2; final int ICONSETS_HANDLER = 3; @Override public void onLoadFinished(Loader<DataHolder> loader, DataHolder data) { if(data == null ) { // In Loader happened error AppUtils.showDialog(MainActivity.this, "Error", "Server request error. Try again later", false); return; } Message msg = mHandler.obtainMessage(); Bundle b = new Bundle(); if(loader.getId() == DataLoader.LOADER_ICONS_ID){ offset += count; // Prepare for next lazy load b.putParcelable("Icons", data.getIcons()); msg.what = ICONS_HANDLER; } else if(loader.getId() == DataLoader.LOADER_STYLES_ID){ b.putParcelable("Styles", data.getStyles()); msg.what = STILES_HANDLER; } else if(loader.getId() == DataLoader.LOADER_ICONSETS_ID){ b.putParcelable("IconSets", data.getIconSets()); msg.what = ICONSETS_HANDLER; } msg.setData(b); mHandler.sendMessage(msg); } final Handler mHandler = new Handler(){ public void handleMessage(Message msg) { Bundle b; b=msg.getData(); if(msg.what == ICONS_HANDLER){ Icons icons = b.getParcelable("Icons"); fillIcons(icons); } else if(msg.what == STILES_HANDLER){ Styles styles = b.getParcelable("Styles"); fillStyles(styles); } else if(msg.what == ICONSETS_HANDLER){ Iconsets iconSets = b.getParcelable("IconSets"); fillIconSets(iconSets); } super.handleMessage(msg); } }; 

 private void fillIcons(Icons icons) { // Resolved After Loader implementation //if(!fragmentManager.isDestroyed()) { // Check problem after rotation screen FragmentManager fragmentManager = getSupportFragmentManager(); Fragment iconsGridFragment = fragmentManager.findFragmentByTag(IconsGridFragment.class.getSimpleName()); if (iconsGridFragment != null) { ((IconsGridFragment) iconsGridFragment).addIcons(icons); } else { iconsGridFragment = IconsGridFragment.newInstance(icons); // Add the fragment to the activity, pushing this transaction on to the back stack. FragmentTransaction ft = fragmentManager.beginTransaction(); ft.replace(R.id.container, iconsGridFragment, IconsGridFragment.class.getSimpleName()); ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); ft.addToBackStack(null); ft.commit(); } } 

 /** * Created by App-z.net on 02.04.15. */ public class DataLoader extends Loader<DataHolder> { private static final boolean DEBUG = true; private static final String TAG = "DataLoader>"; public static final String ARGS_URL = "url"; private String urlFeed; private RequestQueue requestQueue; private DataHolder dataHolder = new DataHolder(); public DataLoader(Context context, Bundle bundle) { super(context); urlFeed = bundle.getString(ARGS_URL); requestQueue = Volley.newRequestQueue(context); // run only once onContentChanged(); } @Override protected void onStartLoading() { if (takeContentChanged()) forceLoad(); } @Override protected void onStopLoading() { if ( DEBUG ) Log.i(TAG, "Loader onStopLoading()"); requestQueue.cancelAll(this); super.onStopLoading(); } @Override protected void onReset() { if ( DEBUG ) Log.i(TAG, "Loader onReset()"); requestQueue.cancelAll(this); super.onReset(); } @Override public void onForceLoad() { super.onForceLoad(); if ( DEBUG ) Log.d(TAG, "Loader onForceLoad() : feedUrl = " + urlFeed); doRequest(DataHolder.getClazz(getId())); } /** * * Get Data */ private void doRequest(Class<?> clazz) { final GsonRequest gsonRequest = new GsonRequest(urlFeed, clazz, null, new Response.Listener<DataHolder.DataHolderItem>() { @Override public void onResponse(DataHolder.DataHolderItem data) { dataHolder.setData(getId(), data); deliverResult(dataHolder); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { if (volleyError != null) if (DEBUG) Log.e(TAG, "volleyError: " + volleyError.getMessage()); deliverResult(null); } }); requestQueue.add(gsonRequest); } } 

 /** * Created by App-z.net on 02.04.15. */ public class DataHolder { public static final int LOADER_ICONS_ID = 1; public static final int LOADER_STYLES_ID = 2; public static final int LOADER_ICONSETS_ID = 3; private Styles styles; private Icons icons; private Iconsets iconsets; public Styles getStyles(){ return styles; } private void setStyles(Styles styles){ this.styles = styles; } public Iconsets getIconsets() { return iconsets; } private void setIconsets(Iconsets iconsets){ this.iconsets = iconsets; } public Icons getIcons(){ return icons; } private void setIcons(Icons icons){ this.icons = icons; } public void setData(int dataId, DataHolderItem item){ switch (dataId){ case LOADER_ICONS_ID: setIcons((Icons)item); break; case LOADER_STYLES_ID: setStyles((Styles)item); break; case LOADER_ICONSETS_ID: setIconsets((Iconsets)item); break; default: assert false : "Error LOADER ID"; } } public DataHolderItem getData(int dataId){ switch (dataId){ case LOADER_ICONS_ID: return getIcons(); case LOADER_STYLES_ID: return getStyles(); case LOADER_ICONSETS_ID: return getIconsets(); default: assert false : "Error LOADER ID"; } return null; } public static Class<?> getClazz(int dataId){ switch (dataId){ case LOADER_ICONS_ID: return Icons.class; case LOADER_STYLES_ID: return Styles.class; case LOADER_ICONSETS_ID: return Iconsets.class; default: assert false : "Error LOADER ID"; } return null; } public interface DataHolderItem{ } }