问题
Hi I have a problem with my tabhost and I don't really understand why. My tab host contains 4 listviews and shows a list in each tab. Sometimes when I change the tab (click on new tab) the content doesn't change or it freezes. I have tried it on several devices and the problem is still there
Here is my code:
public class TabHostActivity extends TabActivity implements OnTabChangeListener {
private TabHost mTabHost;
private Resources mResources;
private SharedPreferences prefs;
private ListView lv1;
private ListView lv2;
private ListView lv3;
private ListView lv4;
private String servicio = "teatre"; // por ahora luego varia segun los
// eventos
private String servicio2 = "expos";
private static final String Tab_title1 = "Agenda";
private static final String Tab_title3 = "Teatre";
private static final String Tab_title4 = "Exposicions";
private static final String Tab_title2 = "Cinema";
private EventsList eventsL;
private ArrayList<Event> events;
private EventAdapterAprop mAdapter;
private EventAdapterAprop mAdapter2;
private EventAdapterAprop mAdapter3;
private EventAdapterAprop mAdapter4;
private EventsList eventsL3;
private EventsList eventsL4;
private ArrayList<Event> events3;
private ArrayList<Event> events4;
private EventsList eventsL2;
private ArrayList<Event> events2;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabhost);
mTabHost = getTabHost();
lv1 = (ListView) findViewById(R.id.list1);
lv2 = (ListView) findViewById(R.id.list2);
lv3 = (ListView) findViewById(R.id.list3);
lv4 = (ListView) findViewById(R.id.list4);
Bundle b = getIntent().getExtras();
//agenda
try{
eventsL = b.getParcelable("events");
events = new ArrayList<Event>();
for (int i = 0; i < eventsL.size(); i++) {
events.add(eventsL.get(i));
}
mAdapter = new EventAdapterAprop(this, events);
} catch (Exception ex) {
ex.printStackTrace();
mAdapter = new EventAdapterAprop(this, crearVacio());
}
// teatro
try{
eventsL3 = b.getParcelable("events3");
events3 = new ArrayList<Event>();
for (int i = 0; i < eventsL3.size(); i++) {
events3.add(eventsL3.get(i));
}
mAdapter3 = new EventAdapterAprop(this, events3);
} catch(Exception ex) {
mAdapter3 = new EventAdapterAprop(this, crearVacio());
ex.printStackTrace();
}
// expos
try{
eventsL4 = b.getParcelable("events4");
events4 = new ArrayList<Event>();
for (int i = 0; i < eventsL4.size(); i++) {
events4.add(eventsL4.get(i));
}
mAdapter4 = new EventAdapterAprop(this, events4);
} catch(Exception ex){
mAdapter4 = new EventAdapterAprop(this, crearVacio());
ex.printStackTrace();
}
// cine
try{
eventsL2 = b.getParcelable("events2");
events2 = new ArrayList<Event>();
for (int i = 0; i < eventsL2.size(); i++) {
events2.add(eventsL2.get(i));
}
mAdapter2 = new EventAdapterAprop(this, events2);
} catch(Exception ex) {
mAdapter2 = new EventAdapterAprop(this, crearVacio());
ex.printStackTrace();
}
//mAdapter2=new EventAdapterAprop(this, crearVacio());
lv1.setAdapter(mAdapter);
lv1.setTextFilterEnabled(true);
lv1.computeScroll();
lv2.setAdapter(mAdapter2);
lv2.setTextFilterEnabled(true);
lv2.computeScroll();
lv3.setAdapter(mAdapter3);
lv3.setTextFilterEnabled(true);
lv3.computeScroll();
lv4.setAdapter(mAdapter4);
lv4.setTextFilterEnabled(true);
lv4.computeScroll();
mTabHost.addTab(mTabHost.newTabSpec(Tab_title1)
.setIndicator(Tab_title1).setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return lv1;
}
}));
mTabHost.addTab(mTabHost.newTabSpec(Tab_title2)
.setIndicator(Tab_title2).setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return lv2;
}
}));
mTabHost.addTab(mTabHost.newTabSpec(Tab_title3)
.setIndicator(Tab_title3).setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return lv3;
}
}));
mTabHost.addTab(mTabHost.newTabSpec(Tab_title4)
.setIndicator(Tab_title4).setContent(new TabContentFactory() {
public View createTabContent(String arg0) {
return lv4;
}
}));
}
public ArrayList<Event> crearVacio() {
ArrayList<Event> arrayList = new ArrayList<Event>();
Event e = new Event();
e.setTitle("Cap esdeveniment correspon a la seva recerca");
e.setDates("");
e.setTimes("");
e.setVenue("");
arrayList.add(e);
return arrayList;
}
@Override
public void onTabChanged(String tabId) {
// TODO Auto-generated method stub
}
}
and the xml:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost" android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android1="http://schemas.android.com/apk/res/android">
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:background="@drawable/fonsbutxacadroid2">
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android1:background="@color/amarillo1"/>
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<ListView android:id="@+id/list1" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"
>
</ListView>
<ListView android:id="@+id/list2" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"
>
</ListView>
<ListView android:id="@+id/list3" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"
>
</ListView>
<ListView android:id="@+id/list4" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"
>
</ListView>
</FrameLayout>
</LinearLayout>
</TabHost>
What is wrong?
Thanks in advance.
回答1:
Making each tab one separate activity solved the problem
layout example:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
xmlns:android1="http://schemas.android.com/apk/res/android"
android1:id="@+id/@android:id/tabhost" android1:layout_height="fill_parent">
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
</FrameLayout>
</LinearLayout>
The tabhost class:
public class AllActivitiesTabs extends TabActivity {
private static final String Tab_title = "Nueva";
private TabHost mTabHost;
private TextView txtTabInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTabHost = getTabHost();
TabSpec spec;
//to add one tab activity
txtTabInfo = new TextView(getApplicationContext());
txtTabInfo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
txtTabInfo.setBackgroundDrawable(getResources().getDrawable(
R.drawable.tab_incidencia));
Intent intent = new Intent();
intent.setClass(this, ListActivityClass.class);
spec = mTabHost.newTabSpec(Tab_title).setIndicator(txtTabInfo)
.setContent(intent);
mTabHost.addTab(spec);
//do the same for other activities
//your activities can be lists or something else:
txtTabInfo2 = new TextView(getApplicationContext());
txtTabInfo2.setBackgroundDrawable(getResources().getDrawable(
R.drawable.tab_solucions));
txtTabInfo2.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
intent = new Intent();
intent.setClass(this, FirstGroup.class);
spec = mTabHost.newTabSpec(Tab_title2).setIndicator(txtTabInfo2)
.setContent(intent);
mTabHost.addTab(spec);
}
}
来源：https://stackoverflow.com/questions/6058708/tab-host-list-adapter-and-lists