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カスタムタブ/ビューページャ（フラグメント）を使用してRest API（JSONを解析する）を使用してリストビューデータを取り込み、Toastを配置してコードをデバッグしました。レイアウトはissue.Someoneだと思います（一度これが働いている、リフレッシュ機能をスワイプダウン実装します）案内してください： -リストビューのデータがViewPagerに埋め込まれていない
activity_main.xml
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
app:tabGravity="fill"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
activity_item1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/colorPrimaryDark"
android:textSize="16sp"
android:textStyle="bold"
/>
<ImageView
android:id="@+id/urlToImage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dip"
android:adjustViewBounds="true"
/>
<TextView
android:id="@+id/description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="14sp"
/>
<Button
android:text="Read More.."
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/button_loadMore"
android:layout_below="@+id/url"
/>
</LinearLayout>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.amk.myfirstapplication.MainActivity"
tools:showIn="@layout/activity_main">
<ListView
android:id="@+id/text_json"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/holo_blue_dark"
android:textColorHighlight="@android:color/primary_text_dark"
android:layout_centerVertical="true"
android:layout_alignParentEnd="true"
android:cacheColorHint="#00000000"
android:textSize="14sp" />
</RelativeLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private ViewPager viewPager;
private Toolbar toolbar;
private TabLayout tabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
TabsPagerAdapter adapter = new TabsPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new Item1(),"Item1");
adapter.addFragment(new Item2(),"Item2");
viewPager.setAdapter(adapter);
}
}
TabsPagerAdapter.java
public class TabsPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public TabsPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
Item1.java
public class Item1 extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
ArrayList<HashMap<String, String>> newsList = new ArrayList<>();
//private SwipeRefreshLayout swipeRefreshLayout;
AssetManager assetManager;
InputStream inputStream = null;
InputStreamReader isr = null;
BufferedReader input = null;
String line=null;
ArrayList<String> list = new ArrayList<>();
private Context myContext;
public Item1(){ }
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onRefresh() {
Toast.makeText(this.getActivity(), "Calling onRefresh", Toast.LENGTH_SHORT).show();
try {
assetManager = this.getActivity().getAssets();
inputStream = assetManager.open("RestEndPoints.txt");
isr = new InputStreamReader(inputStream);
input= new BufferedReader(isr);
while ((line = input.readLine()) != null) {
list.add(line);
}
Collections.shuffle(list);
Toast.makeText(this.getActivity(), "List"+list.size(), Toast.LENGTH_SHORT).show();
for (String url : list) {
new Item1.MyAsyncTask().execute(url);
}
}catch (Exception e)
{
Toast.makeText(this.getActivity(), "Got exception", Toast.LENGTH_SHORT).show();
e.getMessage();
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
onRefresh();
return inflater.inflate(R.layout.activity_item1, container,false);
}
class MyAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
//swipeRefreshLayout.setRefreshing(true);
return RestService.doGet(urls[0]);
}
@Override
protected void onPostExecute(String result) {
if(RetainData.reuseArray == null)
RetainData.reuseArray = new ArrayList<>();
Toast.makeText(getContext(), "Entering Json loop", Toast.LENGTH_SHORT).show();
try {
JSONObject json = new JSONObject(result);
JSONArray articles = (JSONArray) json.get("articles");
for (int i=0;i< articles.length();i++)
{
JSONObject c = (JSONObject) articles.get(i);
String author = c.getString("author");
String title = c.getString("title");
String description = c.getString("description");
String url = c.getString("url");
String urlToImage = c.getString("urlToImage");
String publishedAt = c.getString("publishedAt");
HashMap<String, String> hm = new HashMap<>();
hm.put("author",author);
hm.put("title",title);
hm.put("description",description);
hm.put("url",url);
hm.put("urlToImage",urlToImage);
hm.put("publishedAt",publishedAt);
newsList.add(hm);
RetainData.reuseArray.add(new com.example.amk.myfirstapplication.ItemList(author, title, description, url, urlToImage, publishedAt));
Toast.makeText(getContext(), "Size:"+newsList.size() , Toast.LENGTH_LONG).show();
}
com.example.amk.myfirstapplication.CustomAdapter adapter = new com.example.amk.myfirstapplication.CustomAdapter(myContext,RetainData.reuseArray);
ListView listView = (ListView) getView().findViewById(R.id.text_json);
Toast.makeText(getContext(), ""+RetainData.reuseArray.size(), Toast.LENGTH_SHORT).show();
listView.setAdapter(adapter);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
CustomAdapter.java
public class CustomAdapter extends ArrayAdapter<com.example.amk.myfirstapplication.ItemList>{
private Context mContext;
public CustomAdapter(Context context, List<ItemList> items) {
super(context, 0, items);
mContext = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
final com.example.amk.myfirstapplication.ItemList item = getItem(position);
// Check if an existing view is being reused, otherwise inflate the view
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.content_main, parent, false);
}
// Lookup view for data population
//TextView authorName = (TextView) convertView.findViewById(R.id.author);
TextView titleName = (TextView) convertView.findViewById(R.id.title);
TextView descriptionName = (TextView) convertView.findViewById(R.id.description);
ImageView urlToImageName = (ImageView) convertView.findViewById(urlToImage);
Button readMore = (Button) convertView.findViewById(R.id.button_loadMore);
//TextView publishedAtName = (TextView) convertView.findViewById(R.id.publishedAt);
// Populate the data into the template view using the data object
//authorName.setText(item.author);
titleName.setText(item.title);
descriptionName.setText(item.description);
readMore.setTag(item.url);
readMore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Toast.makeText(mContext, (String)v.getTag(), Toast.LENGTH_SHORT).show();
CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
/*builder.setCloseButtonIcon(BitmapFactory.decodeResource(
getResources(), R.drawable.ic_arrow_back));*/
CustomTabsIntent customTabsIntent = builder.build();
customTabsIntent.launchUrl(mContext, Uri.parse(item.url));
}
});
Glide.with(convertView.getContext())
.load(item.urlToImage)
.thumbnail(0.5f)
.override(600,200)
.placeholder(R.drawable.android_logo)
.crossFade()
.into(urlToImageName);
return convertView;
}
}
申し訳ありませんが、私の完全なコードを以下に掲載しました： - – Addy