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幫我使用此代碼。我解析XML文件，將對象添加到ArrayList，然後在recyclerview中顯示信息，但只有一個對象顯示，儘管ArrayList包含5個對象。我如何顯示所有對象？謝謝。這裏是我的代碼將Xml解析爲本地文件並將其顯示爲回收站視圖
public class WorldRegionsAdapter extends RecyclerView.Adapter<WorldRegionsAdapter.WorldRegionsHolder> {
private static final String TAG = WorldRegionsAdapter.class.getCanonicalName();
public List<WorldRegion> worldRegionList;
private Context context;
public WorldRegionsAdapter(Context context, List<WorldRegion> worldRegionList) {
this.context = context;
this.worldRegionList = worldRegionList;
}
@Override
public WorldRegionsHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
View view = inflater.inflate(R.layout.world_region, viewGroup, false);
return new WorldRegionsHolder(view);
}
@Override
public void onBindViewHolder(WorldRegionsHolder worldRegionsHolder, int position) {
WorldRegion worldRegion = worldRegionList.get(position);
worldRegionsHolder.ivWorld.setImageResource(R.drawable.ic_world_globe_dark);
worldRegionsHolder.tvRegion.setText(worldRegion.getRegionName());
}
@Override
public int getItemCount() {
return worldRegionList.size();
}
public static class WorldRegionsHolder extends RecyclerView.ViewHolder {
@BindView(R.id.iv_world_globe)
ImageView ivWorld;
@BindView(R.id.tv_region)
TextView tvRegion;
public WorldRegionsHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
}
}
}
public class WorldRegion {
public String polyExtract;
public String regionType;
public String regionName;
public WorldRegion() {
}
public WorldRegion(String region, String regionType, String regionName) {
this.polyExtract = region;
this.regionType = regionType;
this.regionName = regionName;
}
public String getPolyExtract() {
return polyExtract;
}
public void setPolyExtract(String polyExtract) {
this.polyExtract = polyExtract;
}
public String getRegionType() {
return regionType;
}
public void setRegionType(String regionType) {
this.regionType = regionType;
}
public String getRegionName() {
return regionName;
}
public void setRegionName(String regionName) {
this.regionName = regionName;
}
@Override
public String toString() {
return "WorldRegion{" +
"polyExtract='" + polyExtract + '\'' +
", regionType='" + regionType + '\'' +
", regionName='" + regionName + '\'' +
'}';
}
}
public class DownloadMapsActivity extends AppCompatActivity {
private static final String FREE_DEVICE_MEMORY = "Free ";
private WorldRegionsAdapter adapter;
private List<WorldRegion> worldRegionList;
// All static variables
static final String KEY_URL = "https://github.com/osmandapp/OsmAnd-resources/blob/master/countries-info/regions.xml";
// XML node keys
static final String KEY_TYPE = "type"; // parent node
static final String KEY_NAME = "name";
static final String KEY_POLY_EXTRACT = "poly_extract";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_download_maps);
TextView tvMemory = (TextView) findViewById(R.id.tv_free_memory);
String devMemory = DeviceMemory.getTotalInternalMemorySize();
tvMemory.setText(FREE_DEVICE_MEMORY + devMemory);
ProgressBar pbMemory = (ProgressBar) findViewById(R.id.pb_memory);
pbMemory.setScaleY(3f);
int numDevMemory = Integer.parseInt(devMemory.replaceAll("[\\D]", ""));
pbMemory.setProgress(numDevMemory);
Uri uri = Uri.parse("https://github.com/osmandapp/OsmAnd-resources/blob/master/countries-info/regions.xml");
File getFileName = new File("" + uri);
getFileName.getName();
worldRegionList = new ArrayList<>();
WorldRegion worldRegion = new WorldRegion();
RecyclerView rvWorldRegions = (RecyclerView) findViewById(R.id.rv_world_regions);
rvWorldRegions.setLayoutManager(new LinearLayoutManager(this));
WorldRegionsAdapter adapter = new WorldRegionsAdapter(this, worldRegionList);
rvWorldRegions.setAdapter(adapter);
try {
XmlPullParser parser = getResources().getXml(R.xml.contacts);
String name = null;
while (parser.getEventType() != XmlPullParser.END_DOCUMENT) {
if (parser.getEventType() == XmlPullParser.START_TAG
&& parser.getName().equals("region")) {
if (parser.getAttributeValue(null, "type").equalsIgnoreCase("continent")) {
name = parser.getAttributeValue(null, "name");
worldRegion.setRegionName(name);
worldRegionList.add(worldRegion);
}
}
parser.next();
adapter.notifyDataSetChanged();
}
} catch (Throwable t) {
}
}
}
和我的XML文件
<?xml version="1.0" encoding="utf-8"?>
<!-- north-europe -->
<region name="denmark" lang="da" poly_extract="north-europe"/>
<region name="estonia" lang="et" poly_extract="north-europe"/>
<region name="iceland" lang="is" poly_extract="north-europe"/>
<region name="faroe-islands" translate="Faroe Islands;entity=node" lang="fo" poly_extract="north-europe"/>
<region name="finland" inner_download_prefix="$name" srtm="no" lang="fi,sv" poly_extract="north-europe">
<region map="no" name="aland" translate="name:fi=Ahvenanmaa;admin_level=3;entity=relation"/>
<region type="srtm" name="eastern-finland" translate="Eastern Finland;entity=relation"/>
<region name="northern-finland" map="no" srtm="no" hillshade="no" wiki="no" translate="name:en=Northern Finland;entity=relation" boundary="no">
<region type="srtm" name="lapland" translate="Lapland;entity=relation"/>
<region type="srtm" name="northern-ostrobothnia" translate="name:en=Northern Ostrobothnia;entity=relation"/>
</region>
<region type="srtm" name="southern-finland" translate="Southern Finland;entity=relation"/>
<region type="srtm" name="western-finland" translate="Western Finland;entity=relation"/>
</region>
<region name="latvia" lang="lv" poly_extract="north-europe"/>
<region name="lithuania" lang="lt" poly_extract="north-europe"/>
<region name="norway" srtm="no" inner_download_prefix="$name" lang="nb,nn" poly_extract="north-europe" join_map_files="yes">
<region srtm="yes" hillshade="no" wiki="no" name="akershus"/>
<region srtm="yes" hillshade="no" wiki="no" name="astfold" translate="Østfold;entity=node"/>
<region srtm="yes" hillshade="no" wiki="no" name="aust-agder"/>
<region srtm="yes" hillshade="no" wiki="no" name="buskerud"/>
<region srtm="yes" hillshade="no" wiki="no" name="finnmark"/>
<region srtm="yes" hillshade="no" wiki="no" name="hedmark"/>
<region srtm="yes" hillshade="no" wiki="no" name="hordaland"/>
<region srtm="yes" hillshade="no" wiki="no" name="more-og-romsdal" translate="Møre og Romsdal;entity=node"/>
<region srtm="yes" hillshade="no" wiki="no" name="nordland"/>
<region srtm="yes" hillshade="no" wiki="no" name="nord-trondelag" translate="Nord-Trøndelag;entity=node"/>
<region srtm="yes" hillshade="no" wiki="no" name="oppland"/>
<region srtm="yes" hillshade="no" wiki="no" name="oslo"/>
<region srtm="yes" hillshade="no" wiki="no" name="rogaland"/>
<region srtm="yes" hillshade="no" wiki="no" name="sogn-og-fjordane" translate="Sogn og Fjordane;entity=node"/>
<region srtm="yes" hillshade="no" wiki="no" name="sor-trondelag" translate="Sør-Trøndelag;entity=node"/>
<region srtm="yes" hillshade="no" wiki="no" name="telemark"/>
<region srtm="yes" hillshade="no" wiki="no" name="troms"/>
<region srtm="yes" hillshade="no" wiki="no" name="vest-agder"/>
<region srtm="yes" hillshade="no" wiki="no" name="vestfold"/>
<region name="svalbard-and-jan-mayen" translate="Svalbard;entity=relation"/>
</region>
<region name="sweden" inner_download_prefix="$name" srtm="no" lang="sv" poly_extract="north-europe">
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="blekinge" translate="Blekinge län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="dalarna" translate="Dalecarlia;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="gavleborg" translate="Gävleborgs län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="gotland" translate="Gotlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="halland" translate="Hallands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="jamtland" translate="Jämtlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="jonkoping" translate="Jönköpings län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="kalmar" translate="Kalmar län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="kronoberg" translate="Kronobergs län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="norrbotten" translate="Norrbottens län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="orebro" translate="Örebro län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="ostergotland" translate="Östergötlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="skane" translate="Skåne län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="sodermanland" translate="Södermanlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="stockholm" translate="Stockholms län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="uppsala" translate="Uppsala län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="varmland" translate="Värmlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="vasterbotten" translate="Västerbottens län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="vasternorrland" translate="Västernorrlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="vastmanland" translate="Västmanlands län;entity=relation"/>
<region map="yes" srtm="yes" hillshade="no" wiki="no" name="vastra-gotaland" translate="Västra Götalands län;entity=relation"/>
</region>
<!-- east-europe -->
<region name="belarus" lang="be,ru" poly_extract="east-europe"/>
<region name="bulgaria" lang="bg" poly_extract="east-europe"/>
<region name="czech-republic" inner_download_prefix="$name" translate="Czech Republic;entity=node" lang="cs,sk" poly_extract="east-europe" join_map_files="yes">
<region name="jihovychod" srtm="no" hillshade="no" wiki="no" translate="name:en=Southeast;ref=CZ06;entity=relation"/>
<region name="jihozapad" srtm="no" hillshade="no" wiki="no" translate="name:en=Southwest;ref=CZ03;entity=relation"/>
<region name="moravskoslezsko" srtm="no" hillshade="no" wiki="no" translate="name:en=Moravia-Silesia;entity=relation"/>
<region name="praha" srtm="no" hillshade="no" wiki="no" translate="name:en=Prague;entity=relation"/>
<region name="severovychod" srtm="no" hillshade="no" wiki="no" translate="name:en=Northeast;ref=CZ05;entity=relation"/>
<region name="severozapad" srtm="no" hillshade="no" wiki="no" translate="name:en=Northwest;ref=CZ04;entity=relation"/>
<region name="stredni-cechy" srtm="no" hillshade="no" wiki="no" translate="name:en=Central Bohemia;entity=relation"/>
<region name="stredni-morava" srtm="no" hillshade="no" wiki="no" translate="name:en=Central Moravia;entity=relation"/>
</region>
<region name="hungary" lang="hu" poly_extract="east-europe"/>
<region name="moldova" lang="ro" poly_extract="east-europe"/>
<region name="poland" inner_download_prefix="$name" lang="pl" poly_extract="east-europe" join_map_files="yes">
<region name="greater-poland" srtm="no" hillshade="no" wiki="no" translate="Greater Poland;entity=node"/>
<region name="kuyavian-pomeranian" srtm="no" hillshade="no" wiki="no" translate="Kuyavian-Pomerania;entity=node"/>
<region name="lesser-poland" srtm="no" hillshade="no" wiki="no" translate="Lesser Poland;entity=node"/>
<region name="lodz" srtm="no" hillshade="no" wiki="no" translate="Łódź;entity=node"/>
<region name="lower-silesian" srtm="no" hillshade="no" wiki="no" translate="Lower Silesia;entity=node"/>
<region name="lublin" srtm="no" hillshade="no" wiki="no" translate="name:en=Lublin Voivodeship;entity=relation"/>
<region name="lubusz" srtm="no" hillshade="no" wiki="no"/>
<region name="masovian" srtm="no" hillshade="no" wiki="no" translate="Masovia;entity=node"/>
<region name="opole" srtm="no" hillshade="no" wiki="no" translate="Opole Voivodeship;entity=node"/>
<region name="podlachian" srtm="no" hillshade="no" wiki="no" translate="Podlachia;entity=node"/>
<region name="pomeranian" srtm="no" hillshade="no" wiki="no" translate="Pomerania;entity=node"/>
<region name="silesian" srtm="no" hillshade="no" wiki="no" translate="Silesia;entity=node"/>
<region name="subcarpathian" srtm="no" hillshade="no" wiki="no" translate="Subcarpathia;entity=node"/>
<region name="swietokrzyskie" srtm="no" hillshade="no" wiki="no" translate="Holy Cross;entity=node"/>
<region name="warmian-masurian" srtm="no" hillshade="no" wiki="no" translate="Warmian-Masurian Voivodeship;entity=node"/>
<region name="west-pomeranian" srtm="no" hillshade="no" wiki="no" translate="West Pomerania;entity=node"/>
</region>
<region name="romania" lang="ro" poly_extract="east-europe"/>
<region name="slovakia" lang="sk" poly_extract="east-europe"/>
<region name="transnistria" hillshade="no" lang="ru,uk,ro" poly_extract="east-europe"/>
<region name="ukraine" inner_download_prefix="$name" lang="uk,ru" poly_extract="east-europe">
<region name="cherkasy" hillshade="no" srtm="no" wiki="no" translate="name:en=Cherkasy Oblast;entity=relation"/>
<region name="chernihiv" hillshade="no" srtm="no" wiki="no" translate="name:en=Chernihiv Oblast;entity=relation"/>
<region name="chernivtsi" hillshade="no" srtm="no" wiki="no" translate="name:en=Chernivtsi Oblast;entity=relation"/>
<region name="crimea" hillshade="no" srtm="no" wiki="no" boundary="ukraine/crimea" translate="name:en=Autonomous Republic of Crimea;entity=relation"/>
<region name="dnipropetrovsk" hillshade="no" srtm="no" wiki="no" translate="name:en=Dnipropetrovsk Oblast;entity=relation"/>
<region name="donetsk" hillshade="no" srtm="no" wiki="no" translate="name:en=Donetsk Oblast;entity=relation"/>
<region name="ivano-frankivsk" hillshade="no" srtm="no" wiki="no" translate="name:en=Ivano-Frankivsk Oblast;entity=relation"/>
<region name="kharkiv" hillshade="no" srtm="no" wiki="no" translate="name:en=Kharkiv Oblast;entity=relation"/>
<region name="kherson" hillshade="no" srtm="no" wiki="no" translate="name:en=Kherson Oblast;entity=relation"/>
<region name="khmelnytskyy" hillshade="no" srtm="no" wiki="no" translate="name:en=Khmelnytskyi Oblast;entity=relation"/>
<region name="kiev" hillshade="no" srtm="no" wiki="no" translate="name:en=Kyiv Oblast;entity=relation"/>
<region name="kiev-city" hillshade="no" srtm="no" wiki="no" translate="name:en=Kyiv;entity=relation"/>
<region name="kirovohrad" hillshade="no" srtm="no" wiki="no" translate="name:en=Kirovohrad Oblast;entity=relation"/>
<region name="luhansk" hillshade="no" srtm="no" wiki="no" translate="name:en=Luhansk Oblast;entity=relation"/>
<region name="lviv" hillshade="no" srtm="no" wiki="no" translate="name:en=Lviv Oblast;entity=relation"/>
<region name="mykolayiv" hillshade="no" srtm="no" wiki="no" translate="name:en=Mykolaiv Oblast;entity=relation"/>
<region name="odessa" hillshade="no" srtm="no" wiki="no" translate="name:en=Odessa Oblast;entity=relation"/>
<region name="poltava" hillshade="no" srtm="no" wiki="no" translate="name:en=Poltava Oblast;entity=relation"/>
<region name="rivne" hillshade="no" srtm="no" wiki="no" translate="name:en=Rivne Oblast;entity=relation"/>
<region name="sumy" hillshade="no" srtm="no" wiki="no" translate="name:en=Sumy Oblast;entity=relation"/>
<region name="ternopil" hillshade="no" srtm="no" wiki="no" translate="name:en=Ternopil Oblast;entity=relation"/>
<region name="transcarpathia" hillshade="no" srtm="no" wiki="no" translate="name:en=Zakarpattia Oblast;entity=relation"/>
<region name="vinnytsya" hillshade="no" srtm="no" wiki="no" translate="name:en=Vinnytsia Oblast;entity=relation"/>
<region name="volyn" hillshade="no" srtm="no" wiki="no" translate="name:en=Volyn Oblast;entity=relation"/>
<region name="zaporizhzhya" hillshade="no" srtm="no" wiki="no" translate="name:en=Zaporizhia Oblast;entity=relation"/>
<region name="zhytomyr" hillshade="no" srtm="no" wiki="no" translate="name:en=Zhytomyr Oblast;entity=relation"/>
</region>
<!-- south-europe -->
<region name="albania" lang="sq" poly_extract="south-europe"/>
<region name="andorra" lang="ca" poly_extract="south-europe"/>
<region name="azores" translate="Azores;entity=relation" hillshade="no" lang="pt" poly_extract="south-europe"/>
<region name="bosnia-herzegovina" translate="Bosnia and Herzegovina;entity=node" lang="bs,hr,sr" poly_extract="south-europe"/>
<region name="croatia" lang="hr" poly_extract="south-europe"/>
<region name="cyprus" translate="name:en=Cyprus;entity=node" lang="el,tr" left_hand_navigation="yes" poly_extract="south-europe"/>
<region name="greece" lang="el" poly_extract="south-europe"/>
<region name="italy" map="no" inner_download_prefix="$name" lang="it" poly_extract="south-europe" join_road_files="yes">
<region name="abruzzo" hillshade="no"/>
<region name="basilicata" hillshade="no"/>
<region name="calabria" hillshade="no"/>
<region name="campania" hillshade="no"/>
<region name="emilia-romagna" hillshade="no"/>
<region name="friuli-venezia-giulia" translate="Friuli Venezia Giulia;entity=node" hillshade="no"/>
<region name="lazio" hillshade="no"/>
<region name="liguria" hillshade="no"/>
<region name="lombardia" hillshade="no"/>
<region name="marche" hillshade="no"/>
<region name="molise" hillshade="no"/>
<region name="piemonte" hillshade="no"/>
<region name="puglia" hillshade="no"/>
<region name="sardegna" hillshade="no"/>
<region name="sicilia" hillshade="no" />
<region name="toscana" hillshade="no"/>
<region name="trentino-alto-adige" translate="Trentino-Alto Adige/Südtirol;entity=node" hillshade="no"/>
<region name="umbria" hillshade="no"/>
<region name="valle-aosta" translate="Valle d'Aosta;entity=node" hillshade="no"/>
<region name="veneto" hillshade="no"/>
</region>
請調試代碼在while循環，看看它的正常工作 –
我調試後設置適配器。計算的尺寸，但沒有顯示在回收站的視圖。 –