I developed an android application, as you see in this picture,
I used sherlock action bar for searching, the only problem is that when the user search something in web tab if he/she wants to see the image result, he should type and search again in image tab, is there any way to pass the edittext parameter to other tabs and do searching when user changed the tabs?
MainActivity:
public class MainActivity extends SherlockFragmentActivity implements
TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private com.actionbarsherlock.app.ActionBar actionBar;
private String[] tabs = { "Sound", "Image", "Web" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getSupportActionBar();
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayShowHomeEnabled(false);
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
actionBar.setHomeButtonEnabled(false);
viewPager.setAdapter(mAdapter);
viewPager.setOffscreenPageLimit(3);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.addTab(actionBar.newTab().setText(tabs[0])
.setTabListener(this), false);
actionBar.addTab(actionBar.newTab().setText(tabs[1])
.setTabListener(this), false);
actionBar.addTab(actionBar.newTab().setText(tabs[2])
.setTabListener(this), true);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public void onTabSelected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
}
#Override
public void onTabReselected(com.actionbarsherlock.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction ft) {
}
}
Adapter:
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new Sound();
case 1:
return new Image();
case 2:
return new Search();
}
return null;
}
#Override
public int getCount() {
return 3;
}
}
Sound Frgment:
public class Sound extends Fragment {
private String URL_ADDRESS, Servlet;
private ListView listview;
private ListViewAdapter adapter;
private List<Spanned> numberlist = new ArrayList<Spanned>();
private List<Ava2> avaList = new ArrayList<Ava2>();
private Boolean isInternetPresent = false;
private ConnectionDetector detector;
private View rootView;
private RelativeLayout loading, layout;
private int counter = 10;
private EditText editText;
private String a = "http://***";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.ava, container, false);
ImageButton voiceSearch = (ImageButton) rootView
.findViewById(R.id.imageButton2);
ImageButton buttonSearch = (ImageButton) rootView
.findViewById(R.id.imageButton1);
listview = (ListView) rootView.findViewById(R.id.listview);
loading = (RelativeLayout) rootView.findViewById(R.id.loading);
layout = (RelativeLayout) rootView.findViewById(R.id.layout);
editText = (EditText) rootView.findViewById(R.id.editText1);
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
#Override
public boolean onEditorAction(TextView v, int actionId,
KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
search();
return true;
}
return false;
}
});
buttonSearch.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
search();
}
});
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view,
int position, long l) {
try {
Intent i = new Intent(getActivity(), Play.class);
startActivity(i);
} catch (Exception e) {
}
}
}
});
return rootView;
}
First,you could write a interface:
public interface OnProfileDataPass {
public String getCurrentSearchword();
public void setCurrentSearchword(String searchword);
}
Then in your fragments:
public class WebFragment extends Fragment {
private OnProfileDataPass dataPasser;
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
dataPasser = (OnProfileDataPass) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString() + " must implement OnProfileDataPass");
}
searchword = dataPasser.getCurrentSearchword();
}
}
In your activity:
public class MainActivity implements OnProfileDataPass {
String currentSearchword;
#Override
public String getCurrentSearchword() {
return currentSearchword;
}
#Override
public String setCurrentSearchword(String searchword) {
this.currentSearchword = searchword;
}
}
That's my solution.When you change the tap,you could listen the proper event and set the word with getActivity.setCurrentSearchword(String newword),then you could get the newword in the fragment's dataPasser variable's method getCurrentSearchword() to get the search word. I have test it in my app. Wish that helps you a little.
you should save the value of the editText in your activity and then pass it as an argument when you call your fragment, using the same technique as the one described here: http://developer.android.com/reference/android/app/Fragment.html
Related
I want to create a multi-step registration form in my android app. I wish to use the viewpager with multiple fragments and each fragment being a step in a registration.
At the end, I want to submit all the data submitted in each fragment using an activity to a mysql database. Can I get a small sample code for this?
This is what I have tried so far. I am able to implement a viewpager with multiple fragments. I have created an interface in the StepOne.java Fragment so as to communicate to an activity. But I am not able to retrieve data from these fragments. It throws a null-pointer exception on line 52.
Here is my code:
SliderActivity.java:
public class SliderActivity extends AppCompatActivity {
ViewPager viewPager;
EditText edName,edPassword, edConfPass;
TextView tvShowAll;
ViewPagerAdapter mPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_slider);
viewPager = findViewById(R.id.view_pager);
mPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mPagerAdapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
}
public void selectIndex(int newIndex) {
viewPager.setCurrentItem(newIndex);
}
#Override
public void onBackPressed() {
int currentPosition = viewPager.getCurrentItem();
if (currentPosition != 0) {
viewPager.setCurrentItem(viewPager.getCurrentItem()-1);
} else {
super.onBackPressed();
}
}
public class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position)
{
case 0:
return new StepOne();
case 1:
return new StepTwo();
case 2:
return new StepThree();
}
return null;
}
#Override
public int getCount() {
return 3; //three fragments
}
}
}
StepOne.java:
public class StepOne extends Fragment {
Button buttonInFragment1;
EditText edName;
public interface ActivityFragmentCallback {
void onSetName(String name);
}
ActivityFragmentCallback listener;
public StepOne() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View rootView = inflater.inflate(R.layout.fragment_step_one, container, false);
edName = rootView.findViewById(R.id.edName);
buttonInFragment1 = rootView.findViewById(R.id.button_one);
if(buttonInFragment1 != null) {
buttonInFragment1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(getContext(),edName.getText().toString(),Toast.LENGTH_SHORT).show();
if(edName != null) {
listener.onSetName(edName.getText().toString());
}
switch (view.getId()){
case R.id.button_one:
((SliderActivity)getActivity()).selectIndex(1);
break;
}
}
});
}
return rootView;
}
#Override
public void onAttach(Context context){
super.onAttach(context);
try {
listener = (ActivityFragmentCallback)context;
}catch (ClassCastException c){
c.printStackTrace();
}
}
}
MessageActivity.java: Here is where I need all the data submitted from all the fragments
public class MessageActivity extends AppCompatActivity implements StepOne.ActivityFragmentCallback {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_message);
}
#Override
public void onSetName(String name){
// tvShowAll = findViewById(R.id.tvShowAll);
// tvShowAll.setText(name);
Toast.makeText(getApplicationContext(),name, Toast.LENGTH_LONG).show();
}
}
Below is some reference link for step by step registration;
Hope you have help
https://github.com/stepstone-tech/android-material-stepper
https://github.com/baoyachi/StepView?utm_source=android-arsenal.com&utm_medium=referral&utm_campaign=3774
public class IMResponseActivity extendsAppCompatActivity implements
ViewPager.OnClickListener {
private static ViewPager viewPager_response;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.activity_imresponse);
setUI();
setViewPager();
} catch (Exception e) {
e.printStackTrace();
}
}
setViewPager() {
for (int i = 0; i < IMAGES.length; i++)
ImagesArray.add(IMAGES[i]);
viewPager_response = (ViewPager) findViewById(R.id.pager_response);
CircleIndicator indicator = (CircleIndicator) findViewById(R.id.indicator);
viewPager_response.setAdapter(new CommonSlideImageAdapter1(IMResponseActivity.this, ImagesArray));
}
public void onClick(View v) {
switch (v.getId()) {
/* case R.id.pager_response:
fragment = new ItemDetailFragment();
//Fragment fragment = new SingleProductFragment();
//Fragment fragment = new ProfileFragment();
// toolbar.setVisibility(View.GONE);
container.setVisibility(View.VISIBLE);
imresponse_layout.setVisibility(View.INVISIBLE);
ft.add(R.id.container_response_details, fragment);
ft.addToBackStack(null);
ft.commit();
break;*/
}
}
// here is my Adapter Code
public class CommonSlideImageAdapter1 extends PagerAdapter {
private ArrayList<Integer> IMAGES;
private LayoutInflater inflater;
private Context context;
public CommonSlideImageAdapter1(Context context, ArrayList<Integer> IMAGES) {
this.context = context;
this.IMAGES=IMAGES;
inflater = LayoutInflater.from(context);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
#Override
public int getCount() {
return IMAGES.size();
}
#Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.common_slideimage_layout1, view, false);
assert imageLayout != null;
final ImageView imageView = (ImageView) imageLayout
.findViewById(R.id.image);
imageView.setImageResource(IMAGES.get(position));
imageView.setClickable(true);
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
view.addView(imageLayout, 0);
return imageLayout;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
#Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
#Override
public Parcelable saveState() {
return null;
}
}
Their is no direct way to implement onItemClick listener and onClickListener in viewpager because it contains different fragments and fragments have their own listeners etc.
so the
first solution for this is implement click listener in fragment
Second solution is to implement your own click listener by extending viewpager class.
to do this there is great solution available
ViewPager OnItemClickListener
hope this will help you.
I am using ViewPager inside my Navigation Drawer all are works fine in devices other than marshmallow devices. in marshmallow devices when i clicking toggle button or swiping the navigation drawer (in both direction) feel a stuck(glitch) in the flow, also when i swipe the viewpager into different tabs also found the stuckking. This was found only in marshmallow device. please help me,, thanks in advance....
this is my code
activity class
public class HomeActivity extends AppCompatActivity{
Toolbar toolbar;
DrawerLayout drawerLayout;
ActionBarDrawerToggle actionBarDrawerToggle;
FragmentTransaction fragmentTransaction;
NavigationView navigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
toolbar = (Toolbar)findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.main_container,new HomeViewPagerFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Home");
navigationView = (NavigationView)findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.home:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new HomeViewPagerFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Home");
item.setChecked(true);
drawerLayout.closeDrawers();
break;
}
return true;
}
});
}
#Override
protected void onPostCreate(#Nullable Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
actionBarDrawerToggle.syncState();
}
}
ViewPager fragment
public class HomeViewPagerFragment extends Fragment {
ArrayList<Model> mArrayList= new ArrayList<>();
Model model;
TabLayout tabLayout;
ViewPager viewPager;
HomeViewPagerAdapter viewPagerAdapter;
public HomeViewPagerFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home_view_pager,container,false);
viewPager = (ViewPager)rootView.findViewById(R.id.view_pager);
// parsing and add datas into mArrayList
viewPagerAdapter = new HomeViewPagerAdapter(getActivity().getSupportFragmentManager(),mArrayList);
viewPager.setAdapter(viewPagerAdapter);
viewPager.setOffscreenPageLimit(2);
// Give the TabLayout the ViewPager
viewPager.setCurrentItem(Credentials.homeTabSelected);
tabLayout = (TabLayout)rootView.findViewById(R.id.sliding_tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
#Override
public void onTabSelected(TabLayout.Tab tab){
Credentials.homeTabSelected = tab.getPosition();
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return rootView;
}
}
viewpager adapter
public class HomeViewPagerAdapter extends FragmentStatePagerAdapter {
ArrayList<Model> mArrayList = new ArrayList<>();
String tabTitles[] = new String[] { "tab1","tab2" };
public HomeViewPagerAdapter(FragmentManager fm, ArrayList<Model> arrayList) {
super(fm);
mArrayList = arrayList;
}
#Override
public Fragment getItem(int position) {
if(position==0) {
return new HomeCentralFragment();
}
else {
return HomeRecyclerFragment.newInstance(mArrayList);
}
}
#Override
public int getCount() {
return tabTitles.length;
}
#Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
}
HomeCentralFragment
public class HomeCentralFragment extends Fragment {
public HomeCentralFragment(){
}
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home_central,null);
//my code is here(buttons, click events etc...)
return rootView;
}
}
HomeRecyclerFragment
public class HomeRecyclerFragment extends Fragment {
RecyclerView recyclerView;
public static ArrayList<Model> mArrayList =new ArrayList<>();
Fragment fragment;
FragmentTransaction fragmentTransaction;
public static HomeRecyclerFragment newInstance(ArrayList<Model> arrayList){
HomeRecyclerFragment fragment = new HomeRecyclerFragment();
mArrayList = arrayList;
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home_recycler_view,null);
recyclerView = (RecyclerView)rootView.findViewById(R.id.card_recycler_view);
recyclerView.setHasFixedSize(true);
//to make horizontal or vertical listview using recyclerview
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
RecyclerView.Adapter adapter = new HomeRecyclerAdapter(getActivity(), mArrayList);
recyclerView.setAdapter(adapter);
recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
GestureDetector gestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() {
#Override public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if(child != null && gestureDetector.onTouchEvent(e)) {
Credentials.selectedPolititian = rv.getChildAdapterPosition(child);
Intent intent = new Intent(getContext(), PersonDetailActivity.class);
intent.putExtra("Class","HomeActivity");
intent.putExtra("array",mArrayList);
startActivity(intent);
getActivity().finish();
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
});
return rootView;
}
}
HomeRecyclerAdapter
public class HomeRecyclerAdapter extends RecyclerView.Adapter<HomeRecyclerAdapter.ViewHolder> {
private ArrayList<Model> profiles;
Context mContext;
public HomeRecyclerAdapter(Context context, ArrayList<Model> profile) {
this.profiles = profile;
this.mContext = context;
}
#Override
public HomeRecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_fragment_home_recycler, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(HomeRecyclerAdapter.ViewHolder viewHolder, int i) {
viewHolder.name.setText(profiles.get(i).getmName());
int length= profiles.get(i).getmDepartment().size();
int k;
String res ="";
for (k=0;k<length;k++){
res = res + profiles.get(i).getmDepartment().get(k)+"\n";
}
viewHolder.department.setText(res);
}
#Override
public int getItemCount() {
return profiles.size();
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public int getItemViewType(int position) {
return position;
}
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView name, department;
//private ImageView imageView;
public ViewHolder(View view) {
super(view);
// imageView = (ImageView) view.findViewById(R.id.image);
name = (TextView) view.findViewById(R.id.p_name);
department = (TextView) view.findViewById(R.id.p_department);
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int pos = getAdapterPosition();
}
});
}
}
}
check view fragments layout, avoid .jpeg images (use .png images)...
check the view pager with some simple fragments, if it work smoothly check the layout views..
This is very simplified problem that I have regarding to Fragments and calling methods between fragments. I have put in the code place where I think calling method should be. Correct me if I'm wrong or if you have right solution for my problem. MainFragment extends Fragment because it is not activity... I have navigation drawer so that is how it suppose to be... :)
public class MainFragment extends Fragment{
public MainFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_pager, container, false);
adapter = new CategoriesPagerAdapter(getChildFragmentManager(),Titles,Numboftabs);
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
tabs = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
tabs.setDistributeEvenly(true);
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
tabs.setViewPager(pager);
Toolbar mToolbar = (Toolbar) getActivity().findViewById(R.id.toolbar_actionbar);
final Spinner spinner_nav = (Spinner) mToolbar.findViewById(R.id.spinner_nav);
spinner_nav.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// ...here I need to call method "writeText()" in both fragments to update both TextViews also in both fragments (tabs)
}
});
}
public class CategoriesPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[];
int NumbOfTabs;
public CategoriesPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
Tab1Class tab1 = new Tab1Class();
return tab1;
} else if (position == 1) {
Tab2Class tab2 = new Tab2Class();
return tab2;
} else {
return null;
}
}
#Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
#Override
public int getCount() {
return NumbOfTabs;
}
}
Tab2Class:
public class Tab1Class extends Fragment {
TextView tv1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_tab1, container, false);
tv1 = (TextView) rootView.findViewById(R.id.tv1);
writeText();
}
public void writeText(){
tv1.setText("TV1 text");
}
}
Tab1Class:
public class Tab2Class extends Fragment {
TextView tv2;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_tab2, container, false);
tv2 = (TextView) rootView.findViewById(R.id.tv2);
writeText();
}
public void writeText(){
tv2.setText("TV2 text");
}
}
.
.
.
Toolbar mToolbar = (Toolbar) getActivity().findViewById(R.id.toolbar_actionbar);
final Spinner spinner_nav = (Spinner) mToolbar.findViewById(R.id.spinner_nav);
spinner_nav.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
/////////////////////////Added////////////
adapter.callWrite();
////////////////////////////////////////
}
});
}
public class CategoriesPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[];
int NumbOfTabs;
/////////////////////Added///////////////////
Tab1Class tab1;
Tab2Class tab2;
//////////////////////////////
public CategoriesPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
tab1 = new Tab1Class();
return tab1;
} else if (position == 1) {
tab2 = new Tab2Class();
return tab2;
} else {
return null;
}
}
////////////////////////////Added////////////////////
public void callWrite(){
if(tab1 != null)
tab1.writeText();
if(tab2 != null)
tab2.writeText();
}
/////////////
.
.
.
Here's an alternative:
public class BlankFragment extends Fragment {
public static final String ACTION_SOME_STUFF_HAPPENED = "stuff_happened_yo";
public static final String EXTRA_STUFF = "this_is_stuff";
public static void notifyStuffHappening(Context context, String stuff){
Intent intent = new Intent(ACTION_SOME_STUFF_HAPPENED);
intent.putExtra(EXTRA_STUFF, stuff);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
private StuffHappenedReceiver mStuffListener;
public static class StuffHappenedReceiver extends BroadcastReceiver {
final BlankFragment mFragment;
public StuffHappenedReceiver(BlankFragment fragment) {
this.mFragment = fragment;
// listen for changes to the account we're using
IntentFilter filter = new IntentFilter(ACTION_SOME_STUFF_HAPPENED);
LocalBroadcastManager.getInstance(fragment.getContext()).registerReceiver(this, filter);
}
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_SOME_STUFF_HAPPENED.equals(action)) {
mFragment.someStuffHappened(intent.getStringExtra(EXTRA_STUFF));
}
}
}
private void someStuffHappened(String stringExtra) {
}
public BlankFragment() {
// Required empty public constructor
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
mStuffListener = new StuffHappenedReceiver(this);
}
#Override
public void onDetach() {
LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(mStuffListener);
mStuffListener = null;
super.onDetach();
}
}
This shows the basics of a fragment that will register a broadcast receiver automatically as it attaches / detaches from the activity.
If the fragment is not attached, it won't be updated.
To update this fragment, call the static method "notifyStuffHappening"
New and working on ViewPager, and encounter some difficulties that would like you to offer some advice...
ViewPagerAdapter class
public class ViewPagerAdapter extends FragmentPagerAdapter
{
private Context _context;
public ViewPagerAdapter(Context context, FragmentManager fm)
{
super(fm);
_context=context;
}
#Override
public Fragment getItem(int position)
{
Fragment f = new Fragment();
switch(position){
case 0:
f=App_Intro.newInstance(_context);
break;
case 1:
f=LayoutTwo.newInstance(_context);
break;
}
return f;
}
#Override
public int getCount()
{
return 2;
}
}
ViewPagerStyle1Activity class
public class ViewPagerStyle1Activity extends FragmentActivity
{
private ViewPager _mViewPager;
private ViewPagerAdapter _adapter;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setUpView();
setTab();
}
private void setUpView()
{
_mViewPager = (ViewPager) findViewById(R.id.viewPager);
_adapter = new ViewPagerAdapter(getApplicationContext(),getSupportFragmentManager());
_mViewPager.setAdapter(_adapter);
_mViewPager.setCurrentItem(0);
}
private void setTab()
{
_mViewPager.setOnPageChangeListener(new OnPageChangeListener()
{
#Override
public void onPageScrollStateChanged(int position) {}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {}
#Override
public void onPageSelected(int position)
{
// TODO Auto-generated method stub
switch(position)
{
case 0:
findViewById(R.id.first_tab).setVisibility(View.VISIBLE);
findViewById(R.id.second_tab).setVisibility(View.INVISIBLE);
break;
case 1:
findViewById(R.id.first_tab).setVisibility(View.INVISIBLE);
findViewById(R.id.second_tab).setVisibility(View.VISIBLE);
break;
}
}
});
}
}
App_Intro class
public class App_Intro extends Fragment
{
public static Fragment newInstance(Context context)
{
App_Intro f = new App_Intro();
return f;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.app_introduce_scroll, null);
Button calpaidBtn = (Button) findViewById(R.id.calpaidBtn); //RED UNDERLINE ERROR
calpaidBtn.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent (Intent.ACTION_VIEW,
Uri.parse("https://abc.com"));
startActivity(intent);
return;
}
});
return root;
}
}
Question:
It underlines red in the App_Intro class for findViewById that "The method findViewById(int) is undefined for the type App_Intro"
How does this be solved? Actually how to put different activities into the ViewPager? Are there any examples?
Many thanks in advance!
Use the following :
root.findViewById(..)