Пересоздать фрагмент
Добавлено: 18 мар 2014, 19:27
Пытаюсь сделать планшетую разметку c ViewPager. Один фрагмент(список) постоянный, два других находятся в ViewPager и листаются.
Использую библиотеку от chrisbanes - ActionBar-PullToRefresh.
Сделала интерфейс обмена данными между фрагментом-списком и остальными двумя. И все работает хорошо, пока не попытаться обновить данные в любом из фрагментов-адресатов.
При выборе значения из списка, нужный результат отображается в обоих фрагментах пейджера. Но при обновлении через onRefreshStarted() данные, почему-то, берутся те, которые были при запуске Activity, а не новые, переданные через интерфейс.
Для справки, код Activity:
[syntax=java]
public class FullArticleActivity extends SherlockFragmentActivity implements OnShareMyDataListener {
TabHost mTabHost;
ViewPager mViewPager;
static TabsAdapter mTabsAdapter;
ViewPager leftViewPager;
static TabsAdapter leftTabsAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_article_pager);
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
mViewPager = (ViewPager) findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager);
mTabsAdapter.addTab(
mTabHost.newTabSpec("Article").setIndicator(
getResources().getText(R.string.article)),
Article.class, null);
mTabsAdapter.addTab(
mTabHost.newTabSpec("Comments").setIndicator(
getResources().getText(R.string.comments)),
Comments.class, null);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("tab", mTabHost.getCurrentTabTag());
}
public static class TabsAdapter extends FragmentPagerAdapter implements
TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final TabHost mTabHost;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final String tag;
private final Class<?> clss;
private final Bundle args;
TabInfo(String _tag, Class<?> _class, Bundle _args) {
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory {
private final Context mContext;
public DummyTabFactory(Context context) {
mContext = context;
}
@Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public TabsAdapter(FragmentActivity activity, TabHost tabHost,
ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mTabHost = tabHost;
mViewPager = pager;
mTabHost.setOnTabChangedListener(this);
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
mTabs.add(info);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
@Override
public int getCount() {
return mTabs.size();
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(),
info.args);
}
@Override
public void onTabChanged(String tabId) {
int position = mTabHost.getCurrentTab();
mViewPager.setCurrentItem(position);
}
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
TabWidget widget = mTabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mTabHost.setCurrentTab(position);
widget.setDescendantFocusability(oldFocusability);
}
@Override
public void onPageScrollStateChanged(int state) {
}
}
@Override
public void onShareMyData(Activity activity, Bundle data) {
Article articleTab = (Article) mTabsAdapter.getItem(0);
((Article) articleTab).setMessage(activity, data);
Comments commentsTab = (Comments) mTabsAdapter.getItem(1);
((Comments) commentsTab).setMessage(activity, data);
}
}
[/syntax]
Фрагменты-адресаты (второй почти такой же):
[syntax=java]public class Article extends SherlockFragment implements OnRefreshListener {
public ParseMyPageTask mt;
String url = "http://..";
String param1 = "";
String param2 = "";
String param3 = "";
WebView webview;
private PullToRefreshLayout mPullToRefreshLayout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
PullToRefreshLayout Rl = (PullToRefreshLayout) inflater.inflate(
R.layout.article_fragment, container, false);
mPullToRefreshLayout = (PullToRefreshLayout) Rl
.findViewById(R.id.ptr_layout);
sp = PreferenceManager.getDefaultSharedPreferences(this.getActivity());
// Now setup the PullToRefreshLayout
ActionBarPullToRefresh
.from(Article.this.getActivity())
.options(
Options.create()
.build())
.allChildrenArePullable()
.listener(this)
.setup(mPullToRefreshLayout);
Bundle extras = getActivity().getIntent().getExtras();
try {
param1 = extras.getString("param1");
param2 = extras.getString("param2");
param3 = extras.getString("param3");
} catch (Exception e1) {
e1.printStackTrace();
}
webview = (WebView) Rl.findViewById(R.id.Article_webView);
mt = (ParseMyPageTask) getActivity().getLastNonConfigurationInstance();
if (mt == null) {
mt = new ParseMyPageTask();
mt.execute(url);
}
if (mt.getStatus() == AsyncTask.Status.FINISHED)
try {
mt.onPostExecute(mt.get());
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
return Rl;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
public Object onRetainNonConfigurationInstance() {
mt.unLink();
return mt;
}
class ParseMyPageTask extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
...
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
webview.loadDataWithBaseURL(...);
}
}
@Override
public void onRefreshStarted(View view) {
mt = new ParseMyPageTask();
mt.execute(url);
}
public void setMessage(Activity activity, Bundle data) {
mPullToRefreshLayout = (PullToRefreshLayout) activity
.findViewById(R.id.ptr_layout);
webview = (WebView) activity.findViewById(R.id.Article_webView);
param1 = data.getString("param1", param1);
param2 = data.getString("param2", param2);
param3 = data.getString("param3", param3);
mt = new ParseMyPageTask();
mt.execute(url);
}
}[/syntax]
Использую библиотеку от chrisbanes - ActionBar-PullToRefresh.
Сделала интерфейс обмена данными между фрагментом-списком и остальными двумя. И все работает хорошо, пока не попытаться обновить данные в любом из фрагментов-адресатов.
При выборе значения из списка, нужный результат отображается в обоих фрагментах пейджера. Но при обновлении через onRefreshStarted() данные, почему-то, берутся те, которые были при запуске Activity, а не новые, переданные через интерфейс.
Для справки, код Activity:
[syntax=java]
public class FullArticleActivity extends SherlockFragmentActivity implements OnShareMyDataListener {
TabHost mTabHost;
ViewPager mViewPager;
static TabsAdapter mTabsAdapter;
ViewPager leftViewPager;
static TabsAdapter leftTabsAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.full_article_pager);
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
mViewPager = (ViewPager) findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager);
mTabsAdapter.addTab(
mTabHost.newTabSpec("Article").setIndicator(
getResources().getText(R.string.article)),
Article.class, null);
mTabsAdapter.addTab(
mTabHost.newTabSpec("Comments").setIndicator(
getResources().getText(R.string.comments)),
Comments.class, null);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("tab", mTabHost.getCurrentTabTag());
}
public static class TabsAdapter extends FragmentPagerAdapter implements
TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final TabHost mTabHost;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final String tag;
private final Class<?> clss;
private final Bundle args;
TabInfo(String _tag, Class<?> _class, Bundle _args) {
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory {
private final Context mContext;
public DummyTabFactory(Context context) {
mContext = context;
}
@Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public TabsAdapter(FragmentActivity activity, TabHost tabHost,
ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mTabHost = tabHost;
mViewPager = pager;
mTabHost.setOnTabChangedListener(this);
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
mTabs.add(info);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
@Override
public int getCount() {
return mTabs.size();
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(),
info.args);
}
@Override
public void onTabChanged(String tabId) {
int position = mTabHost.getCurrentTab();
mViewPager.setCurrentItem(position);
}
@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
TabWidget widget = mTabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mTabHost.setCurrentTab(position);
widget.setDescendantFocusability(oldFocusability);
}
@Override
public void onPageScrollStateChanged(int state) {
}
}
@Override
public void onShareMyData(Activity activity, Bundle data) {
Article articleTab = (Article) mTabsAdapter.getItem(0);
((Article) articleTab).setMessage(activity, data);
Comments commentsTab = (Comments) mTabsAdapter.getItem(1);
((Comments) commentsTab).setMessage(activity, data);
}
}
[/syntax]
Фрагменты-адресаты (второй почти такой же):
[syntax=java]public class Article extends SherlockFragment implements OnRefreshListener {
public ParseMyPageTask mt;
String url = "http://..";
String param1 = "";
String param2 = "";
String param3 = "";
WebView webview;
private PullToRefreshLayout mPullToRefreshLayout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
PullToRefreshLayout Rl = (PullToRefreshLayout) inflater.inflate(
R.layout.article_fragment, container, false);
mPullToRefreshLayout = (PullToRefreshLayout) Rl
.findViewById(R.id.ptr_layout);
sp = PreferenceManager.getDefaultSharedPreferences(this.getActivity());
// Now setup the PullToRefreshLayout
ActionBarPullToRefresh
.from(Article.this.getActivity())
.options(
Options.create()
.build())
.allChildrenArePullable()
.listener(this)
.setup(mPullToRefreshLayout);
Bundle extras = getActivity().getIntent().getExtras();
try {
param1 = extras.getString("param1");
param2 = extras.getString("param2");
param3 = extras.getString("param3");
} catch (Exception e1) {
e1.printStackTrace();
}
webview = (WebView) Rl.findViewById(R.id.Article_webView);
mt = (ParseMyPageTask) getActivity().getLastNonConfigurationInstance();
if (mt == null) {
mt = new ParseMyPageTask();
mt.execute(url);
}
if (mt.getStatus() == AsyncTask.Status.FINISHED)
try {
mt.onPostExecute(mt.get());
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
return Rl;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
public Object onRetainNonConfigurationInstance() {
mt.unLink();
return mt;
}
class ParseMyPageTask extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
...
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
webview.loadDataWithBaseURL(...);
}
}
@Override
public void onRefreshStarted(View view) {
mt = new ParseMyPageTask();
mt.execute(url);
}
public void setMessage(Activity activity, Bundle data) {
mPullToRefreshLayout = (PullToRefreshLayout) activity
.findViewById(R.id.ptr_layout);
webview = (WebView) activity.findViewById(R.id.Article_webView);
param1 = data.getString("param1", param1);
param2 = data.getString("param2", param2);
param3 = data.getString("param3", param3);
mt = new ParseMyPageTask();
mt.execute(url);
}
}[/syntax]