0
viewpager을 3 fragments A, B, C로 채 웁니다. 각각 선형 레이아웃 관리자가있는 recycler view입니다. viewpager은 AsyncTask을 사용하여 일부 데이터를 가져온 후 활동에 설정됩니다.안드로이드 ViewPager는 첫 번째 조각 onload에 대한 빈 화면을 보여 주지만 다른 조각을 가로 지르는 경우 올바른 내용을 표시합니다.
활동보기로드에서 첫 번째 fragment (A)은 빈 화면 (내용 없음)을 표시합니다. 그러나 A에서 B, B에서 C, 그리고 C에서 B, B에서 A로 조각을 스 와이프하면 fragment A에 예상되는 내용을 볼 수 있습니다.
파편 A (오디오) -로드에 다음 B (비디오), 및 C (텍스트)
역방향 : C -> B -> A (본 시간 함량은
fragment_audio_items.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/audio_feed_item_list_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
AudioFeedItemsFragment.java
package com.abc.app.fragments;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.abc.app.R;
import com.abc.app.adapters.FeedItemListRVAdapter;
import com.abc.app.models.feed.FeedItem;
import java.util.ArrayList;
import java.util.List;
/**
* Created by amit on 10/12/16.
*/
public class AudioFeedItemsFragment extends Fragment {
public static final String AUDIO_FEED_ITEM_LIST = "AUDIO_FEED_ITEM_LIST";
RecyclerView mRecyclerView;
LinearLayoutManager mLinearLayoutManager;
FeedItemListRVAdapter mFeedItemListRVAdapter;
List<FeedItem> mAudioFeedItemList = new ArrayList<>();
Bundle mBundle;
public static AudioFeedItemsFragment newInstance(ArrayList<FeedItem> feedItems) {
AudioFeedItemsFragment audioFeedItemsFragment = new AudioFeedItemsFragment();
Bundle audioArgs = new Bundle();
audioArgs.putParcelableArrayList(AUDIO_FEED_ITEM_LIST, feedItems);
audioFeedItemsFragment.setArguments(audioArgs);
return audioFeedItemsFragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBundle = getArguments();
if (null != mBundle) {
mAudioFeedItemList = mBundle.getParcelableArrayList(AUDIO_FEED_ITEM_LIST);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_audio_items, container, false);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.audio_feed_item_list_recycler_view);
mLinearLayoutManager = new LinearLayoutManager(getContext());
mRecyclerView.setLayoutManager(mLinearLayoutManager);
mFeedItemListRVAdapter = new FeedItemListRVAdapter(mAudioFeedItemList);
mRecyclerView.setAdapter(mFeedItemListRVAdapter);
return rootView;
///return super.onCreateView(inflater, container, savedInstanceState);
}
}
FeedMediaTabCollectionAdapter.java
012,383,795 527,activity_new_feed_items.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/feed_media_layout"
android:layout_width="match_parent" android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/feed_media_pager"
android:layout_width="match_parent" android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:id="@+id/feed_media_tab_layout"
app:tabMode="scrollable"
app:tabGravity="fill"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.design.widget.TabLayout>
</android.support.v4.view.ViewPager>-
</android.support.design.widget.CoordinatorLayout>
NewFeedItemsActivity.java
package com.abc.app.activities;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import com.abc.app.R;
import com.abc.app.adapters.FeedMediaTabCollectionAdapter;
import com.abc.app.fragments.AudioFeedItemsFragment;
import com.abc.app.fragments.TextFeedItemsFragment;
import com.abc.app.fragments.VideoFeedItemsFragment;
import com.abc.app.models.feed.FeedItem;
import com.abc.app.models.feed.FeedLink;
import com.abc.app.utilities.FeedUtils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by amit on 13/12/16.
*/
public class NewFeedItemsActivity extends DrawerActivity {
public static final String AUDIO = "Audio";
public static final String VIDEO = "Video";
public static final String TEXT = "Text/Misc";
private ArrayList<FeedItem> mAudioFeedItemList = null;
private ArrayList<FeedItem> mVideoFeedItemList = null;
private ArrayList<FeedItem> mTextFeedItemList = null;
private Map<String, ArrayList<FeedItem>> feedItemsListMap = null;
static ArrayList<FeedLink> mfeedLinks;
ProgressDialog mProgressDialog;
FeedMediaTabCollectionAdapter mFeedMediaTabCollectionAdapter;
ViewPager mViewPager;
TabLayout mTabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentLayout(R.layout.activity_new_feed_items);
mViewPager = (ViewPager) findViewById(R.id.feed_media_pager);
mTabLayout = (TabLayout) findViewById(R.id.feed_media_tab_layout);
new LoadFeedItemList().execute();
}
public void setupViewPager() {
List<String> titles = Arrays.asList(AUDIO, VIDEO, TEXT);
mFeedMediaTabCollectionAdapter = new FeedMediaTabCollectionAdapter(getSupportFragmentManager(), feedItemsListMap, titles);
mViewPager.setAdapter(mFeedMediaTabCollectionAdapter);
mTabLayout.setupWithViewPager(mViewPager);
}
class LoadFeedItemList extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(NewFeedItemsActivity.this);
mProgressDialog.setMessage("Loading feed items...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.setCancelable(false);
mProgressDialog.show();
mAudioFeedItemList = new ArrayList<>();
mVideoFeedItemList = new ArrayList<>();
mTextFeedItemList = new ArrayList<>();
feedItemsListMap = new HashMap<>();
populateFeedLinks();
}
@Override
protected String doInBackground(String... params) {
List<FeedItem> feedItemList = new ArrayList<>();
for (FeedLink feedLink : mfeedLinks) {
List<FeedItem> localFeedItems = FeedUtils.getFeedItemList(feedLink.getUrl(), feedLink.getType());
for (FeedItem feedItem : localFeedItems) {
String mimeType = FeedUtils.getFeedItemMediaType(feedItem);
if (mimeType.equalsIgnoreCase(FeedUtils.AUDIO)) {
mAudioFeedItemList.add(feedItem);
} else if (mimeType.equalsIgnoreCase(FeedUtils.VIDEO)) {
mVideoFeedItemList.add(feedItem);
} else {
mTextFeedItemList.add(feedItem);
}
}
}
return null;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
feedItemsListMap.put(AudioFeedItemsFragment.AUDIO_FEED_ITEM_LIST, mAudioFeedItemList);
feedItemsListMap.put(VideoFeedItemsFragment.VIDEO_FEED_ITEM_LIST, mVideoFeedItemList);
feedItemsListMap.put(TextFeedItemsFragment.TEXT_FEED_ITEM_LIST, mTextFeedItemList);
setupViewPager();
mProgressDialog.dismiss();
}
}
void populateFeedLinks() {
mfeedLinks = new ArrayList<>();
FeedLink feedLink1 = new FeedLink();
feedLink1.setUrl("http://www.bbc.co.uk/programmes/p002vsnk/episodes/downloads.rss");
feedLink1.setType(FeedUtils.RSS);
mfeedLinks.add(feedLink1);
/*FeedLink feedLink2 = new FeedLink();
feedLink2.setUrl("http://www.npr.org/rss/podcast.php?id=344098539");
feedLink2.setType(FeedUtils.RSS);
mfeedLinks.add(feedLink2);*/
FeedLink feedLink3 = new FeedLink();
feedLink3.setUrl("http://www.theregister.co.uk/headlines.atom");
feedLink3.setType(FeedUtils.ATOM);
mfeedLinks.add(feedLink3);
/*
FeedLink feedLink4 = new FeedLink();
feedLink4.setUrl("http://www.lse.ac.uk/assets/richmedia/webFeeds/publicLecturesAndEvents_AtomAllMediaTypes2016.xml");
feedLink4.setType(FeedUtils.ATOM);
mfeedLinks.add(feedLink4);*/
}
}
업데이트 : 내가 생각, 나는 코드로 문제를 발견했다. 문제는 FeedItemListRVAdapter.java에서 FeedItemListRVAdapter.java
FeedItemListRVAdapter.java
public class FeedItemListRVAdapter extends RecyclerView.Adapter<FeedItemListRVAdapter.FeedItemViewHolder> {
private static String TAG = "FeedItemListRVAdapter";
public static List<FeedItem> feedItemList; // <------- static?? This was the issue!
@Override
public FeedItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d(TAG, "-----------onCreateViewHolder--------------");
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.feed_item_list, parent, false);
FeedItemViewHolder feedItemViewHolder = new FeedItemViewHolder(view);
return feedItemViewHolder;
}
@Override
public void onBindViewHolder(FeedItemViewHolder holder, int position) {
Log.d(TAG, "-----------onBindViewHolder--------------");
holder.feedItemTitle.setText(feedItemList.get(position).getTitle());
holder.feedItemDescription.setText(feedItemList.get(position).getDescription());
holder.feedItemPubDate.setText(FeedUtils.getLocalTimeString(feedItemList.get(position).getPubDate()));
String downloadSize = FeedUtils.round2DecimalPlace(FeedUtils.bytesToMB(feedItemList.get(position).getMediaFileSize()));
holder.feedItemDownloadSize.setText(downloadSize + " MB");
holder.feedItemDuration.setText(FeedUtils.getMinSec(feedItemList.get(position).getMediaDuration()) + " min");
}
@Override
public int getItemCount() {
return feedItemList.size();
}
public static class FeedItemViewHolder extends RecyclerView.ViewHolder {
CardView cardView;
TextView feedItemTitle;
TextView feedItemPubDate;
TextView feedItemDuration;
TextView feedItemDownloadSize;
TextView feedItemDescription;
FeedItemViewHolder(View itemView) {
super(itemView);
Log.d("FeedItemViewHolder", "-----------FeedItemViewHolder--------------");
cardView = (CardView) itemView.findViewById(R.id.feed_item_card_view);
feedItemTitle = (TextView) itemView.findViewById(R.id.feed_item_title);
feedItemPubDate = (TextView) itemView.findViewById(R.id.feed_item_pub_date);
feedItemDuration = (TextView) itemView.findViewById(R.id.feed_item_duration);
feedItemDownloadSize = (TextView) itemView.findViewById(R.id.feed_item_download_size);
feedItemDescription = (TextView) itemView.findViewById(R.id.feed_item_description);
}
}
public FeedItemListRVAdapter(List<FeedItem> feedItemList) {
this.feedItemList = feedItemList;
}
}