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Ho un'attività con 2 frammenti. Ho deciso di utilizzare un PageAdapter per scorrere tra le due visualizzazioni, ma, per rimanere vicino alle best practice di progettazione Android, ho anche deciso di utilizzare le schede della barra delle azioni (quelle fisse). Sto usando ActionBarSherlock e del codice dallo here per implementare le schede. Con solo il pageadapter l'attività ha funzionato meravigliosamente, ora sto avendo due problemi: 1) il primo frammento (MatchRugbyButtonFragment) sovrascrive un'immagine di se stesso, quindi se lo tocco e lo spostamento o cambio qualcosa, vedo l'immagine sopra il frammento funzionante. 2) quando vado al secondo frammento, il primo perde tutte le variabili (azzeramento del timer, reset dei contatori, ecc.). Ho dovuto creare su tablistener perché un frammento è un SherlockFragment e l'altro è un SherlockListFragment e questo ha causato un errore in cui non è stato possibile eseguire il cast del frammento su SherlockListFragment. Qui è l'attività:Mix di TabListener, ActionBarSherlock Fragment e ListFragment, PageAdapter? Un casino
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ListFragment;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
public class MatchRugbyFragments extends SherlockFragmentActivity implements View.OnClickListener, View.OnLongClickListener{
public static ArrayList<String> commentary;
public static ArrayAdapter<String> adapter;
// list contains fragments to instantiate in the viewpager
static List<Fragment> fragments = new Vector<Fragment>();
// page adapter between fragment list and view pager
private MyPagerAdapter mPagerAdapter;
// view pager
private ViewPager mPager;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragments_rugby);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
MatchRugbyButtonFragment buttonFrag = new MatchRugbyButtonFragment();
MatchRugbySummaryFragment listFrag = new MatchRugbySummaryFragment();
fragmentTransaction.add(R.id.pager, buttonFrag);
fragmentTransaction.add(R.id.pager, listFrag);
fragmentTransaction.commit();
// creating fragments and adding to list
fragments.add(buttonFrag);
fragments.add(listFrag);
// creating adapter and linking to view pager
this.mPagerAdapter = new MyPagerAdapter(super.getSupportFragmentManager(),fragments);
mPager = (ViewPager) super.findViewById(R.id.pager);
mPager.setAdapter(this.mPagerAdapter);
String[] array = {""};
commentary = new ArrayList<String>();
commentary.addAll(Arrays.asList(array));
adapter = new ArrayAdapter<String>(this,
R.layout.list_item_commentary, commentary);
final ActionBar bar = getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
bar.setHomeButtonEnabled(true);
bar.addTab(bar.newTab()
.setText("Comandi")
.setTabListener(new TabListener<MatchRugbyButtonFragment>(
this, "comandi", MatchRugbyButtonFragment.class)));
bar.addTab(bar.newTab()
.setText("Riassunto")
.setTabListener(new TabListenerList<MatchRugbySummaryFragment>(
this, "riassunto", MatchRugbySummaryFragment.class)));
if (savedInstanceState != null) {
bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("tab", getActionBar().getSelectedNavigationIndex());
}
//Comandi per il click prolungato
public boolean onLongClick(View view) {
return false;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.rugby_match_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// app icon in action bar clicked; go home
Intent intent = new Intent(this, SportScoutActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public static void addCommentaryRow(String s){
adapter.add(s);
MatchRugbySummaryFragment f2 = (MatchRugbySummaryFragment) fragments.get(1);
f2.setListAdapter(adapter);
}
public static String commentaryToString(){
String sAdapter= adapter.toString();
return sAdapter;
}
public void onClick(View arg0) {
}
/**
* @return the commentary
*/
public ArrayList<String> getCommentary() {
return commentary;
}
/**
* @param commentary the commentary to set
*/
public void setCommentary(ArrayList<String> commentary) {
MatchRugbyFragments.commentary = commentary;
}
/**
* @return the adapter
*/
public ArrayAdapter<String> getAdapter() {
return adapter;
}
/**
* @param adapter the adapter to set
*/
public void setAdapter(ArrayAdapter<String> adapter) {
MatchRugbyFragments.adapter = adapter;
}
// page 1 fragment listener implementation
public void onPage1(String s) {
// page 2 fragment update
}
public static class TabListener<T> implements ActionBar.TabListener {
private final SherlockFragmentActivity mActivity;
private final String mTag;
private final Class<T> mClass;
private final Bundle mArgs;
private android.support.v4.app.Fragment mFragment;
public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz) {
this(activity, tag, clz, null);
}
public TabListener(SherlockFragmentActivity activity, String tag, Class<T> clz, Bundle args) {
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
mFragment = mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached()) {
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
ft.detach(mFragment);
ft.commit();
}
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if (mFragment == null) {
mFragment = (SherlockFragment) Fragment.instantiate(mActivity, mClass.getName(), mArgs);
ft.add(android.R.id.content, mFragment, mTag);
} else {
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(mActivity, "Reselected!", Toast.LENGTH_SHORT).show();
}
}
public static class TabListenerList<T> implements ActionBar.TabListener {
private final SherlockFragmentActivity mActivity;
private final String mTag;
private final Class<T> mClass;
private final Bundle mArgs;
private android.support.v4.app.ListFragment mFragment;
public TabListenerList(SherlockFragmentActivity activity, String tag, Class<T> clz) {
this(activity, tag, clz, null);
}
public TabListenerList(SherlockFragmentActivity activity, String tag, Class<T> clz, Bundle args) {
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
mFragment = (ListFragment) mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached()) {
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
ft.detach(mFragment);
ft.commit();
}
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if (mFragment == null) {
mFragment = (ListFragment) Fragment.instantiate(mActivity, mClass.getName(), mArgs);
ft.add(android.R.id.content, mFragment, mTag);
} else {
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(mActivity, "Reselected!", Toast.LENGTH_SHORT).show();
}
}
}
Ecco la classe pageadapter:
package com.gmail.david.corsalini.sportscout;
import java.util.List;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class MyPagerAdapter extends FragmentPagerAdapter {
// fragments to instantiate in the viewpager
private List<Fragment> fragments;
// constructor
public MyPagerAdapter(FragmentManager fm,List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
// return access to fragment from position, required override
@Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
// number of fragments in list, required override
@Override
public int getCount() {
return this.fragments.size();
}
}
Si prega di inviare la soluzione come risposta qui sotto in modo che possiamo ottenere questo dalla lista senza risposta. Grazie. –