我们正在为大学的最终项目开发应用程序。 我们正在使用带有三个选项卡的PagerTabStrip（ViewPager）。每个选项卡都包含一个片段，每个片段内部都有一些View组件和一个listview。
主要问题是列表视图不滚动而有更多项目需要看。（例如，如果我们有超过10个项目，我们无法访问底部的项目） 请注意，我们可以编辑和删除列表视图中的项目（我们使用longclicklistener实现了这些项目），但滚动功能是唯一不起作用的功能。似乎没有启用滚动。
我们搜索过高和低但我们找不到解决方案。
我发布了以下代码。
主要活动
logFragment PlacesCategoriesAdmin
public class MainActivity extends AppCompatActivity implements OnPlaceSelectedListener {
/**
* 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;
//fragments
private TalkNowFragment talkNowFragment;
private PhraseAdmin phraseAdmin;
private PlacesCategoriesAdmin placesCategory;
private DatabaseAdapter dbAdapter;
private List<String> frases_categoria;
private MainActivity context;
private GPSTracker tracker;
private Menu menu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = MainActivity.this;
this.tracker = new GPSTracker(this.context);
setContentView(R.layout.activity_main);
// 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);
dbAdapter = new DatabaseAdapter(this);
frases_categoria = new ArrayList<>();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
this.menu = menu;
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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();
switch (id) {
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onPlaceSelected(Category category) {
//we pass the fragment the data now.
//setea el modo
talkNowFragment.setMode(category.getName());
//traigo las frases
try {
frases_categoria = dbAdapter.getPhrasesFromCategory(category.getId());
} catch (SQLException e) {
e.printStackTrace();
}
if(frases_categoria.size() > 0) {
//set the phrases and category to the fragment
// then it displays it on the dialog
talkNowFragment.populatePhrases(frases_categoria,category.getName());
}else{
}
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 3;
// Tab Titles
private String tabtitles[] = new String[] { "Hablar ahora", "Lugares", "Categorías" };
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).
switch (position){
case 0:
talkNowFragment = TalkNowFragment.newInstance(0,"HABLAR AHORA #1");
return talkNowFragment;
case 1:
placesCategory = PlacesCategoriesAdmin.newInstance(0, "LUGARES Y CATEGORIAS #2");
return placesCategory;
case 2:
phraseAdmin = PhraseAdmin.newInstance(0,"FRASES #3");
return phraseAdmin;
default:
return null;
}
}
@Override
public int getCount() {
return PAGE_COUNT;
}
@Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
}
/**
* 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";
/**
* 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;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, 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;
}
}
}
activity_main.xml中
public class PlacesCategoriesAdmin extends Fragment implements PlacesListAsyncResponse {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "page";
private static final String ARG_PARAM2 = "title";
private static final String API_KEY = "AIzaSyBCT48NGa9b5DKnvywEPSTfyGDa-BZ4Udo";
private ArrayList<String> adapterPlaces;
private GooglePlacesRequest googlePlacesRequest;
// TODO: Rename and change types of parameters
private int page;
private String title;
private ListView categoryPlaceListview;
private PlacesList placesList;
private GPSTracker tracker;
private Button search_button;
private EditText editTextSearch;
private TextView result_count;
private Button gps_buttton;
private DatabaseAdapter dbAdapter;
private FragmentActivity context;
public PlacesCategoriesAdmin() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param page Parameter 1.
* @param title Parameter 2.
* @return A new instance of fragment PlacesCategoriesAdmin.
*/
// TODO: Rename and change types and number of parameters
public static PlacesCategoriesAdmin newInstance(int page, String title) {
PlacesCategoriesAdmin fragment = new PlacesCategoriesAdmin();
Bundle args = new Bundle();
args.putInt(ARG_PARAM1, page);
args.putString(ARG_PARAM2, title);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
page = getArguments().getInt(ARG_PARAM1);
title = getArguments().getString(ARG_PARAM2);
}
//init placesList
placesList = new PlacesList();
//instancia el gps.
tracker = new GPSTracker(getActivity());
dbAdapter = new DatabaseAdapter(getContext());
context = this.getActivity();
}
private void setNameGPSButton(){
if (!tracker.isGPSEnabled()) {
gps_buttton.setText(getResources().getString(R.string.activate_GPS));
} else {
gps_buttton.setText(getResources().getString(R.string.deactivate_GPS));
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View viewRoot = inflater.inflate(R.layout.fragment_places_categories_admin, container, false);
search_button = (Button)viewRoot.findViewById(R.id.search_place_gps);
editTextSearch = (EditText)viewRoot.findViewById(R.id.searchFieldCatPlace);
categoryPlaceListview = (ListView)viewRoot.findViewById(R.id.listview_category_place);
result_count = (TextView)viewRoot.findViewById(R.id.result_count_text);
gps_buttton = (Button)viewRoot.findViewById(R.id.buttonGPS);
this.setNameGPSButton();
gps_buttton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivityForResult(intent, 0);
onActivityResult(0, 0, intent);
System.out.println("sigue ejecución, no deveria imprimirse hasta q vuelva del gps");
}
}
);
editTextSearch.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
search_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
performSearch();
}
});
return viewRoot;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == 0) {
setNameGPSButton();
}
}
private void performSearch(){
final Fragment fragment = this;
closeKeyboard();
String placeToSearch = editTextSearch.getText().toString().trim();
//replaceAll para reemplazar espacios en blanco por & sino genera una
//consulta invalida.
if (tracker.getLocation() != null) {
try {
String tempSQL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?"
+ "location=" + tracker.getLatitude() + "," + tracker.getLongitude()
+ "&name=" + placeToSearch.replaceAll("\\s","&")
+ "&rankby=distance"
+ "&key=" + API_KEY;
Log.d("ATENCION",tempSQL);
googlePlacesRequest = new GooglePlacesRequest(fragment);
googlePlacesRequest.execute(tempSQL);
} catch (Exception e) {
Log.d("ERROR", e.getMessage());
}
} else {
try {
ArrayList<Category> categories = dbAdapter.getAllCategoriesThatMatchWith(placeToSearch);
loadCategoriesInrResultList(categories);
closeKeyboard();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
private void closeKeyboard(){
InputMethodManager inputManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
private void loadCategoriesInrResultList(ArrayList<Category> categories){
ArrayList<String> catNames = new ArrayList<>();
for (Category c : categories) {
catNames.add(c.getName());
}
result_count.setText("Resultados:"+ catNames.size());
ArrayAdapter adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, catNames);
categoryPlaceListview.setAdapter(adapter);
categoryPlaceListview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
String category = adapterView.getAdapter().getItem(position).toString();
OnPlaceSelectedListener listener = (OnPlaceSelectedListener) getActivity();
try {
//Category cat = dbAdapter.getCategoryLikeFromPlace(placesList.getPlace(place));
Category cat = dbAdapter.getCategoryFromSpanishName(category);
//en caso de que no exista la categoria, habria q recomendar q la cree
//xq es muy limitado
Toast.makeText(getActivity(), "Modo: " + cat.getName() + " seleccionado correctamente", Toast.LENGTH_SHORT).show();
listener.onPlaceSelected(cat);
} catch (SQLException e) {
e.printStackTrace();
}
}
});
}
private void populateListviewPlaces(ArrayList<String> adapterPlaces) {
final ArrayAdapter<String> adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, adapterPlaces);
categoryPlaceListview.setAdapter(adapter);
categoryPlaceListview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
String place = adapterView.getAdapter().getItem(position).toString();
//obtener la categoria en ingles,
// utilizar el servicio de traductor (no se q tan bueno sera)
//y si no existe recomendar que cree una categoria nueva del administrador de frases
//con ese nombre.
OnPlaceSelectedListener listener = (OnPlaceSelectedListener)getActivity();
//obtengo la categoria a partir del lugar y
//comunico a MainActivity la categoria
try {
Category cat = dbAdapter.getCategoryLikeFromPlace(placesList.getPlace(place));
if(cat != null){
Toast.makeText(getActivity(), "Modo: " +cat.getName()+" seleccionado correctamente", Toast.LENGTH_SHORT).show();
listener.onPlaceSelected(cat);
}
else{
String categoryToAdd = dbAdapter.getCategoryToAdd(placesList.getPlace(place));
CreateCategoryOptionDialog createCategoryOptionDialog = new CreateCategoryOptionDialog(categoryToAdd);
createCategoryOptionDialog.show(getFragmentManager(),"Nueva Categoria");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
});
}
private ArrayList<String> createListAdapter(PlacesList placesList) {
//crea el arraylist con nombres para utilizarlo como adapter.
ArrayList<String> namesPlaces = new ArrayList<>();
for(String key: placesList.getResults().keySet()){
namesPlaces.add(key);
}
return namesPlaces;
}
@Override
//cuando se ejecuta onPostExecute() es que termina de cargar
// procesamos los datos aca
public void placesFinishedLoading(String output) {
placesList = googlePlacesRequest.getPlacesList();
adapterPlaces = createListAdapter(placesList);
populateListviewPlaces(adapterPlaces);
result_count.setText("Resultados:" + adapterPlaces.size());
}
}
<?xml version="1.0" encoding="utf-8"?>
fragment_places_categories_admin.xml
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffffff">
<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.v4.view.PagerTabStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:paddingBottom="10dp"
android:paddingTop="20dp"
android:layout_marginTop="100dp"
android:background="@color/colorPrimary"
android:textAppearance="@style/PagerTabStripText"/>
</android.support.v4.view.ViewPager>
</android.support.design.widget.AppBarLayout>
有什么想法吗？提前谢谢！
答案 0 :(得分：1)
试试这个：
yourListView.setOnTouchListener(new ListView.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
v.onTouchEvent(event);
return true;
}
});