我在使用listviews查看Feed时遇到问题。我有两个Feed在同一个活动中相互叠加一个流新闻，现在我将事件添加到底部但它无法识别第二个listview的android id ???
<ListView
android:id="@android:id/list"
android:background="@color/red"
android:layout_toRightOf="@+id/map"
android:layout_width="260dp"
android:layout_marginTop="5dp"
android:layout_marginLeft="10dp"
android:layout_height="413dp" />
这第一个listview非常有效。
<ListView
android:id="@+id/android:list1"
android:background="@color/blue"
android:layout_toRightOf="@+id/button3"
android:layout_width="260dp"
android:layout_marginTop="430dp"
android:layout_marginLeft="6dp"
android:layout_height="390dp" />
这个listview不起作用？我知道它的android id？我试过几个变种？
android:id="@+id/android:list1"
android:id="@android:id/list1"
android:id="@+id/list1"
需要什么帮助？ 我花了几个小时搜索代码，我现在知道它的问题，因为如果我交换listview活动然后第二个listview工作??
private class MyTask extends AsyncTask<Void, Void, Void>{
@Override
protected Void doInBackground(Void... arg0) {
try {
URL rssUrl = new URL("http:/news.rss");
///URL rssUrl1 = new URL("http://events.rss");
SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
///InputSource myInputSource1 = new InputSource(rssUrl1.openStream());
///myXMLReader.parse(myInputSource1);
myRssFeed = myRSSHandler.getFeed();
///myRssFeed1 = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
if (myRssFeed!=null || myRssFeed1!=null)
{
TextView feedupdate = (TextView)findViewById(R.id.feedupdate);
feedupdate.setText(myRssFeed.getupdate());
//TextView feedupdate1 = (TextView)findViewById(R.id.feedupdate1);
///feedupdate1.setText(myRssFeed1.getupdate());
ArrayAdapter<RSSItem> adapter =
new ArrayAdapter<RSSItem>(getApplicationContext(),
android.R.layout.simple_list_item_1,myRssFeed.getList());
setListAdapter(adapter);
///ArrayAdapter<RSSItem> adapter1 =
//new ArrayAdapter<RSSItem>(getApplicationContext(),
//android.R.layout.simple_list_item_1,myRssFeed1.getList());
//setListAdapter(adapter1);
}else{
TextView textEmpty = (TextView)findViewById(android.R.id.empty);
textEmpty.setText("No Feed Found");
}
super.onPostExecute(result);
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Uri feedUri = Uri.parse(myRssFeed.getItem(position).getLink());
Uri feedUri1 = Uri.parse(myRssFeed1.getItem(position).getLink());
Intent myIntent = new Intent(Intent.ACTION_VIEW, feedUri);
Intent myIntent1 = new Intent(Intent.ACTION_VIEW, feedUri1);
startActivity(myIntent);
startActivity(myIntent1);
}
}
public class HomeActivity extends ListActivity {
static final LatLng TULLAMORE = new LatLng(53.28000, -7.49000);
static final LatLng MRA = new LatLng(53.274823, -7.492655);
private GoogleMap map;
private RSSFeed myRssFeed = null;
private RSSFeed myRssFeed1 = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title);
new MyTask().execute();
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
Marker tullamore = map.addMarker(new MarkerOptions().position(TULLAMORE)
.title("Tullamore"));
Marker mra = map.addMarker(new MarkerOptions()
.position(MRA)
.title("-")
.snippet("Hey :-)")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.ic_launcher)));
map.moveCamera(CameraUpdateFactory.newLatLngZoom(TULLAMORE, 70));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
map.setMyLocationEnabled(true);
map.getUiSettings().setZoomControlsEnabled(true);
map.getUiSettings().setMyLocationButtonEnabled(true);
map.setTrafficEnabled(true);
Button button1 = (Button) findViewById(R.id.button1);
Button button2 = (Button) findViewById(R.id.button2);
Button button3 = (Button) findViewById(R.id.button3);
Button button4 = (Button) findViewById(R.id.button4);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
//Starting a new Intent
Intent FavouritesScreen = new Intent(getApplicationContext(),FavouritesActivity.class);
startActivity(FavouritesScreen);
}
});
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
//Starting a new Intent
Intent NearbyScreen = new Intent(getApplicationContext(), NearbyActivity.class);
startActivity(NearbyScreen);
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
//Starting a new Intent
Intent TourismScreen = new Intent(getApplicationContext(), TourismActivity.class);
startActivity(TourismScreen);
}
});
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
//Starting a new Intent
Intent MapScreen = new Intent(getApplicationContext(), MapActivity.class);
startActivity(MapScreen);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
private class MyTask extends AsyncTask<Void, Void, Void>{
@Override
protected Void doInBackground(Void... arg0) {
try {
URL rssUrl = new URL("http://www.midlandsireland.ie/news.rss");
URL rssUrl1 = new URL("http://feedity.com/midlandsireland-ie/V1pUU1VR.rss");
SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
XMLReader myXMLReader = mySAXParser.getXMLReader();
RSSHandler myRSSHandler = new RSSHandler();
myXMLReader.setContentHandler(myRSSHandler);
InputSource myInputSource = new InputSource(rssUrl.openStream());
myXMLReader.parse(myInputSource);
InputSource myInputSource1 = new InputSource(rssUrl1.openStream());
myXMLReader.parse(myInputSource1);
myRssFeed = myRSSHandler.getFeed();
myRssFeed1 = myRSSHandler.getFeed();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
if (myRssFeed!=null || myRssFeed1!=null)
{
TextView feedupdate = (TextView)findViewById(R.id.feedupdate);
feedupdate.setText(myRssFeed.getupdate());
TextView feedupdate1 = (TextView)findViewById(R.id.feedupdate1);
feedupdate1.setText(myRssFeed1.getupdate());
ListView newsfeed = (ListView)findViewById(android.R.id.list);
ListView eventsfeed = (ListView)findViewById(R.id.list1);
ArrayAdapter<RSSItem> adapter =
new ArrayAdapter<RSSItem>(getApplicationContext(),
android.R.layout.simple_list_item_1,myRssFeed.getList());
setListAdapter(adapter);
}else{
TextView textEmpty = (TextView)findViewById(android.R.id.empty);
textEmpty.setText("No Feed Found");
}
super.onPostExecute(result);
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
Uri feedUri = Uri.parse(myRssFeed.getItem(position).getLink());
Intent myIntent = new Intent(Intent.ACTION_VIEW, feedUri);
startActivity(myIntent);
}
}
答案 0 :(得分：1)
这个ID：
android:id="@+id/android:list1"
android:id="@android:id/list1"
。标识android:id="@+id/list1"有效，如果您在findViewById(R.id.list1)中使用Activity（其内容包含两个ListViews的布局），您将找到{{1} }}
此外，正如您的代码所示，您似乎试图将两个ListView操纵为一个明显错误的问题。在ListViews方法中，您将使用onPostExecute()方法为标识为setListAdapter()的{{1}}和其他ListView设置适配器。做：
android.R.id.list关于此代码：
ListView你想做什么开始两个（？！？！）活动（去做什么？！）？
编辑：
ListView second = (ListView) findViewById(R.id.list1);
// set the adapter for this ListView