Actionbarsherlock And Fragmenttabspager
As a lot of people have been doing so far, I'm implementing the FragmentTabsPager into my app, which is using ActionBarSherlock 4.0. However, I'm lost. Fragments, and all of Google
Solution 1:
I will show you my code that has a ViewPager, TabListener, and system of Fragments linked to each tab. It implements ABS, but as of yet, still crashes on Gingerbread and lower (works beautifully on ICS, though):
import java.util.ArrayList;
import library.DatabaseHandler;
import org.json.JSONObject;
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View.OnClickListener;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
publicclassPollingextendsSherlockFragmentActivity {
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
privatefinalstaticStringTAG="21st Polling:";
publicvoidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = newViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
ActionBarbar= getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayShowTitleEnabled(false);
bar.setDisplayShowHomeEnabled(false);
mTabsAdapter = newTabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText(R.string.login),
LoginFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.economics),
EconFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.elections),
ElectionsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.politics),
PoliticsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.science),
ScienceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.finance),
FinanceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.religion),
ReligionFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.military),
MilitaryFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.international),
InternationalFragment.class, null);
Log.v(TAG, (String)bar.getTabAt(0).getText());
}
publicstaticclassTabsAdapterextendsFragmentPagerAdapterimplementsActionBar.TabListener, ViewPager.OnPageChangeListener {
privatefinal Context mContext;
privatefinal ActionBar mActionBar;
privatefinal ViewPager mViewPager;
privatefinal ArrayList<TabInfo> mTabs = newArrayList<TabInfo>();
staticfinalclassTabInfo {
privatefinal Class<?> clss;
privatefinal Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
publicTabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = activity.getSupportActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
publicvoidaddTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfoinfo=newTabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
publicintgetCount() {
return mTabs.size();
}
public SherlockFragment getItem(int position) {
TabInfoinfo= mTabs.get(position);
return (SherlockFragment)Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
publicvoidonPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
publicvoidonPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
publicvoidonPageScrollStateChanged(int state) {
}
publicvoidonTabSelected(Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
//Log.v(TAG, "clicked");Objecttag= tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
publicvoidonTabUnselected(Tab tab, FragmentTransaction ft) {}
publicvoidonTabReselected(Tab tab, FragmentTransaction ft) {}
publicvoidonTabReselected(Tab tab, android.app.FragmentTransaction ft) {}
publicvoidonTabUnselected(Tab tab, android.app.FragmentTransaction ft) {}
}
And here is what one fragment looks like:
package com.davekelley.polling;
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.SherlockFragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
publicclassMilitaryFragmentextendsSherlockFragment {
@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.militaryfragment, container, false);
}
}
My last note would that my code still has one other issue: individual fragments do not always reload their interface after the user press back (which results in removing the entire app from the screen, regardless which tab/fragment they are on, because I have no backStack). So that's what I'm working through now. I think once I have that sorted, I'll try to figure out why I still don't have Gingerbread execution functioning properly. Either way, I hope looking through this code helps you out.
Here is a fragment with some onClickListeners:
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.SherlockFragment;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
publicclassLoginFragmentextendsSherlockFragment {
Button loginButton;
Button registerButton;
Polling activity;
publicViewonCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.loginfragment, container, false);
return v;
}
publicvoidonResume() {
super.onResume();
Log.d("Econ", "onresume");
loginButton = (Button) getActivity().findViewById(R.id.loginButton);
loginButton.setOnClickListener(loginListener);
registerButton = (Button) getActivity().findViewById(R.id.registerButton);
registerButton.setOnClickListener(registerListener);
}
publicOnClickListener loginListener = newOnClickListener() {
@OverridepublicvoidonClick(View v) {
if(loginButton.getText().toString() == "Log Out") {
activity.loginReport(2);
loginButton.setText(R.string.login);
//Remove user from dB sqllite when I know how
}
else {
Log.v("LoginF", "onclick");
ProgressDialog progressDialog = newProgressDialog(getActivity());
progressDialog.setMessage("Logging in...");
LoginTask loginTask = newLoginTask((Polling) getActivity(), progressDialog);
loginTask.execute();
}
}
};
publicOnClickListener registerListener = newOnClickListener() {
@OverridepublicvoidonClick(View v) {
Log.v("Register", "onclick");
ProgressDialog progressDialog = newProgressDialog(getActivity());
progressDialog.setMessage("Registering new user...");
RegisterTask registerTask = newRegisterTask((Polling) getActivity(), progressDialog);
registerTask.execute();
}
};
publicvoidonAttach(Activity activity) {
super.onAttach(activity);
this.activity = (Polling) activity;
}
publicvoidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
publicvoidonActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
publicvoidonStart() {
super.onStart();
Log.d("Econ", "onstart");
}
publicvoidonPause() {
super.onPause();Log.d("Econ", "onpause");
}
publicvoidonStop() {
super.onStop();
Log.d("Econ", "onstop");
}
publicvoidonDestroyView() {
super.onDestroyView();
Log.d("Econ", "ondestroyview");
}
publicvoidonDestroy() {
super.onDestroy();
Log.d("Econ", "ondestroy");
}
publicvoidonDetach() {
super.onDetach();
Log.d("Econ", "ondetach");
}
}
The loginTask objects that you see are actually classes that extend ASyncTask - they handle connecting to my server and registering/logging in.
I thought it would be helpful to add in one bit more of code. This is another one of my fragments, like LoginFragment, but it inflates a UI a little differently. Eventually, what you see in the while loop below, will head into an ASyncTask to acquire each question from the server, rather than the dummy string array you see:
publicclassEconFragmentextendsSherlockFragment {
private TableLayout questionContainer;
intpos=0;
private String[] titles = {"The first title ", "hallo1","hallo2", "hallo3",
"hallo4", "hallo5","hallo6", "hallo7","hallo8", "hallo9"};
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.v("Econ", "onCreateView");
Viewv= inflater.inflate(R.layout.econfragment, container, false);
questionContainer = (TableLayout) v.findViewById(R.id.questionContainer);
//bsint leftMargin=5;
int topMargin=5;
int rightMargin=5;
int bottomMargin=5;
while (pos < 10) {
Viewquestion= inflater.inflate(R.layout.question, null);
question.setId(pos);
TextViewtitle= (TextView) question.findViewById(R.id.questionTextView);
title.setText(titles[pos]);
Buttoncharts= (Button) question.findViewById(R.id.chartsButton);
charts.setId(pos);
charts.setOnClickListener(chartsListener);
TableRowtr= (TableRow) question;
TableLayout.LayoutParamstrParams=newTableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
tr.setLayoutParams(trParams);
Log.v("econ", "while loop");
questionContainer.addView(tr);
pos++;
}
pos = 0;
return v;
}
Solution 2:
I have ported the FragmentTabsPager Activity and associated Fragments from "Support4Demos" (Android Support library sample) to use ActionBarSherlock and true ActionBar Tabs. The sample includes an Activity that uses both a ViewPager and Tabs to switch between Fragments. The Fragments contain three kinds of ListViews. I've tested it from ICS down to Eclair (2.1). You can browse or download the code at http://code.google.com/p/sherlock-demo/.
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