我在Android Studio中创建了一个标签式活动，从“新活动”窗口对话框中选择它。
标签号不是固定的，而是从文件中读取，因此有一个随机数量的标签。为此，我使用了FragmentStatePagerAdapter。
在此活动中，我想显示每个标签的填充列表视图，但问题是列表视图未显示。
如下所示，这是java类，我在其中处理选项卡中的操作。
public class TournamentActivity extends AppCompatActivity {
private int returnT = 0, goingT = 0;
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tournament);
Intent intent = this.getIntent();
String committee = intent.getStringExtra(TournamentsAdapter.EXTRA_COMMITTEE);
String tournament = intent.getStringExtra(TournamentsAdapter.EXTRA_TOURNAMENT);
String roundName = intent.getStringExtra(TournamentsAdapter.EXTRA_ROUNDNAME);
int roundId = intent.getExtras().getInt("EXTRA_ROUNDID");
int roundAr = intent.getExtras().getInt("EXTRA_ROUNDAR");
int matchDay = intent.getExtras().getInt("EXTRA_MATCHDAY");
int roundStage = intent.getExtras().getInt("EXTRA_ROUNDSTAGE");
new GetDataFromURL(this, "tournament.html").execute("http://www.fip.it/AjaxGetDataCampionato.asp?com=" + committee + "&camp=" + tournament + "&fase=" + roundStage + "&girone=" + roundId + "&ar=" + roundAr + "&turno=" + matchDay);
//parse del file per vedere titolo e quante schede fare (numero di giornate del campionato)
try{
FileReader fr = new FileReader(getFilesDir() + "/ImportData/tournament.html");
BufferedReader br = new BufferedReader(fr);
String line;
while((line = br.readLine())!= null){
if(line.contains("tableTopBkg")){
while((line = br.readLine())!= null){
Pattern pattern = Pattern.compile(">(.+?)</div>");
Matcher matcher = pattern.matcher(line);
while (matcher.find()){
String s = matcher.group(1);
s = s.substring(s.lastIndexOf(">") + 1);
returnT = Integer.parseInt(s);
}
if(line.equals("</tr>") && goingT == 0){
goingT += returnT;
}
else if(line.equals("</tr>")){
break;
}
}
}
}
System.out.println(returnT);
}catch (IOException ignored){}
catch (Exception e){e.printStackTrace();}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
if(roundAr == 1)
mViewPager.setCurrentItem(matchDay - 1);
else if(roundAr == 0)
mViewPager.setCurrentItem((matchDay + goingT) - 1);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_tournament, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
// +++++ QUI SI POPOLANO LE TABS +++++
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_tournament, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
ListView listViewGames = (ListView) view.findViewById(R.id.listViewGames);
GamesAdapter adapter = new GamesAdapter(getActivity(), android.R.layout.simple_list_item_1);
listViewGames.setAdapter(adapter);
}
/*
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
GamesAdapter adapter = new GamesAdapter(getContext(), R.layout.activity_tournament);
listViewGames.setAdapter(adapter);
}*/
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show N total pages.
return goingT + returnT;
}
}
}
在onViewCreated方法中，我获得了listview的引用，然后创建了我的自定义适配器。随后，使用listViewGames.setAdapter(adapter);我设置了适配器。
此时调用onViewCreated时，setAdapter方法不会调用适配器中的getView。
我还尝试在onCreateView方法中设置适配器，但它仍然不起作用。
这是适配器类：
public class GamesAdapter extends ArrayAdapter{
private Context context;
public GamesAdapter(Context context, int resource) {
super(context, resource);
this.context = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.fragment_games, null);
ImageView imageViewStatus = (ImageView) convertView.findViewById(R.id.imageViewStatus);
ImageView imageViewTeamA = (ImageView) convertView.findViewById(R.id.imageViewTeamA);
ImageView imageViewTeamB = (ImageView) convertView.findViewById(R.id.imageViewTeamB);
TextView textViewGameId = (TextView) convertView.findViewById(R.id.textViewGameId);
TextView textViewDateTime = (TextView) convertView.findViewById(R.id.textViewDateTime);
TextView textViewTeamA = (TextView) convertView.findViewById(R.id.textViewTeamA);
TextView textViewTeamB = (TextView) convertView.findViewById(R.id.textViewTeamB);
TextView textViewScoreA = (TextView) convertView.findViewById(R.id.textViewScoreA);
TextView textViewScoreB = (TextView) convertView.findViewById(R.id.textViewScoreB);
FileReader fr = null;
String gameId = "";
try {
fr = new FileReader(context.getFilesDir() + "/ImportData/tournament.html");
BufferedReader br = new BufferedReader(fr);
String line;
int hops = 0;
while((line = br.readLine())!= null){
if(line.contains("<div class=\"risTrCode\">") && hops == position){
Pattern pattern = Pattern.compile(">(.+?)</a></div>");
Matcher matcher = pattern.matcher(line);
gameId = matcher.group(1);
System.out.println(gameId);
hops++;
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
textViewGameId.setText(gameId);
return convertView;
}
}