I have 4 tab in mainactivity with viewpagerAdpater. From 4th fragment I am going to another activity and from there I am passing data throguh bundle into main activity . Now senario is taht I wanted to send that data Into 4th tab fragment.
I aprecaite if anyone explain me out with correct solution.
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Tab3--- I wanted to send data directly mainacitivty to 3 fragment .
public class TabFragment3 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.tab_fragment_3, container, false);
}
}
Related
So, in the current state, I can see the fragment inside, showing when I boot up the virtual phone; however, as soon as I switch to different fragment, from my drawer, and switch back again into the fragment, with the tableLayout, its shows nothing! Plus, switching between the tabs does seem to fix it.
You can see the image here
Here is the code:
package com.example.teamapp;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.viewpager.widget.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.material.tabs.TabItem;
import com.google.android.material.tabs.TabLayout;
public class HomeFragmentNav extends Fragment {
FragmentManager fragmentManagerHome;
ViewPager viewPager;
TabLayout tableLayout;
PagerAdapter pagerAdapter;
TabItem TeamsTab;
TabItem ChatTab;
View v;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_home_nav, container, false);
tableLayout = v.findViewById(R.id.TabBar);
TeamsTab = v.findViewById(R.id.TeamsTab);
ChatTab = v.findViewById(R.id.ChatTab);
viewPager = v.findViewById(R.id.ViewPager);
tableLayout.getTabAt(1).select();
tableLayout.getTabAt(0).select();
fragmentManagerHome = getFragmentManager();
pagerAdapter = new PagerAdapter(fragmentManagerHome,
tableLayout.getTabCount(), getContext());
viewPager.setAdapter(pagerAdapter);
tableLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setAdapter(pagerAdapter);
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return v;
}
#Override
public void onResume() {
super.onResume();
tableLayout = v.findViewById(R.id.TabBar);
TeamsTab = v.findViewById(R.id.TeamsTab);
ChatTab = v.findViewById(R.id.ChatTab);
viewPager = v.findViewById(R.id.ViewPager);
tableLayout.getTabAt(1).select();
tableLayout.getTabAt(0).select();
fragmentManagerHome = getFragmentManager();
pagerAdapter = new PagerAdapter(fragmentManagerHome,
tableLayout.getTabCount(), getContext());
viewPager.setAdapter(pagerAdapter);
}
}
Thank you for your help.
Prevent the page from refreshing.
view_pager.setOffscreenPageLimit(2);
Found the problem, I used getFragmentManager() instead of getChildFragmentManager()
i followed this article http://www.truiton.com/2015/06/android-tabs-example-fragments-viewpager/ to implement swipe view and it work nice. So now i want to add button on Tab1 and when clicked has to send data to Tab2.
I know there is the issue of using interface but honestly i don't know how to add it on these codes and work provide am completely new to the android.
so far i have tried my best on these links Communication between SlidingTabLayout tabs, How to pass data from one swipe tab to another? and How can I communicate/pass data through different Fragments with Swipe Tab? but i fail.
Any one help please to make it work on every stage , i mean from Tab1 ->Mainactivity->Tab2
thanks alot
Here are the codes after i edit the question
Fragment1
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TabFragment1 extends Fragment implements AdapterView.OnItemSelectedListener{
Button send;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.tab_fragment_1, container, false);
send=(Button)v.findViewById(R.id.send);
send.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// value to be sent to the TabFragment2 on button click
String value=" My Data";
}
});
return v;
}
}
Fragment2
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TabFragment2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.tab_fragment_2, container, false);
//Display value from TabFragment1
textview.setText(value);
}
}
Interface class
public Interface FragmentCommunication
{
public void printMessage(String message);
}
MainActivity
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity implements FragmentCommunication{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
public void printMessage(String message)
{
Toast.makeText(MainActivity.this,message,Toast.LENGTH_LONG).show();
}
}
Adapter Class
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
TabFragment1 tab1 = new TabFragment1();
return tab1;
case 1:
TabFragment2 tab2 = new TabFragment2();
return tab2;
default:
return null;
}
}
#Override
public int getCount() {
return mNumOfTabs;
}
}
so after posting more code I'm answering:
Implement some FragmentCommunication for both your Fragments:
//public class TabFragment1 extends Fragment implements FragmentCommunication{
public class TabFragment2 extends Fragment implements FragmentCommunication{
//public static final String TAG="TabFragment1";
public static final String TAG="TabFragment2";
...
#Override
public void onActivityCreated (Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
if(getActivity() instanceOf MainActivity)
((MainActivity) getActivity()).registerFragmentCommunication(
TAG, this);
}
#Override
public void printMessage(String message){
Toast.makeText(getActivity(), TAG+" says: "+message,
Toast.LENGTH_SHORT).show();
}
}
note this line inside onActivityCreated:
((MainActivity) getActivity()).registerFragmentCommunication(TAG, this);
this means implemented FragmentCommunication, TAG will be unique key/name of Fragment and whole method is registration of your interface in Activity. so now you have to add registerFragmentCommunication method to your MainActivity and keep reference to passed interfaces, e.g. in HashMap:
HashMap<String, FragmentCommunication> fragmentCommunications =
new HashMap<String, FragmentCommunication>();
...
public void registerFragmentCommunication(String key, FragmentCommunication fc){
fragmentCommunications.put(key, fc);
}
so now you can access each FragmentCommunication of both fragments from your MainActivity, e.g by using method like this:
public void callFragmentCommunication(String key, String msg){
if(fragmentCommunications.get(key)!=null)
fragmentCommunications.get(key).printMessage();
}
callFragmentCommunication(TabFragment1.TAG, "hi!");
callFragmentCommunication(TabFragment2.TAG, "hi!");
method is public, so Fragments can call it simply like this:
//inside TabFragment1
if(isAdded() && getActivity()!=null &&
getActivity() instanceOf MainActivity &&
!getActivity().isFinishing())
((MainActivity) getActivity()).callFragmentCommunication(
TabFragment2.TAG, "hi!");
this will show Toast with text: "TabFragment2 says: hi!", which was called inside TabFragment1. now you may pass another kind of data as well :)
there is much more methods like communicating through FragmentStatePagerAdapter like here, passing Bundle arguments where fragments are initialized, additional feedback interfaces (e.g. returning true/false when message was passed) etc. Above is just very simplified way, good luck with improving it! :)
I'm new to tab layout material design. How can i get position of the tab after selecting tab each time. i'm using the following code.
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
Toast.makeText(getApplicationContext(),"Pos onTabSelected: "+tab.getPosition(),Toast.LENGTH_SHORT).show();
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
By using this code i can get only the first tab position(only one time). I want get the position after selecting the tabs every time.
Complete Code:
package info.androidhive.materialtabs.activity;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import info.androidhive.materialtabs.R;
import info.androidhive.materialtabs.fragments.OneFragment;
import info.androidhive.materialtabs.fragments.ThreeFragment;
import info.androidhive.materialtabs.fragments.TwoFragment;
public class SimpleTabsActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_simple_tabs);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
Toast.makeText(getApplicationContext(),"Pos onTabSelected: "+ tabLayout.getSelectedTabPosition(),Toast.LENGTH_SHORT).show();
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new OneFragment(), "ONE");
adapter.addFragment(new TwoFragment(), "TWO");
adapter.addFragment(new ThreeFragment(), "THREE");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
tab.getPosition() is used to get the currently selected tab position.
Add the below code before calling setOnTabSelectedListener
tabLayout.setupWithViewPager(viewPager);
It will work fine.
I am trying to create an Android app that has Tabs with Fragments and ViewPager.
I've tried looking for a solution online to no avail. Most solutions I've seen only mentioned of wrong imports but I don't think that;s the problem. It would be nice if someone can not only fix my error but also explain a bit of why it happens. I'm following this tutorials and it seems liable : http://www.truiton.com/2015/06/android-tabs-example-fragments-viewpager/
Here is my code:
package com.example.carlajoyce.ccare;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import static android.support.design.widget.TabLayout.*;
public class MytabActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mytab);
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TabLayout tabLayout = (TabLayout)findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText(R.string.string_pending));
tabLayout.addTab(tabLayout.newTab().setText(R.string.string_onprocess));
tabLayout.addTab(tabLayout.newTab().setText(R.string.string_onhold));
tabLayout.addTab(tabLayout.newTab().setText(R.string.string_completed));
tabLayout.setTabGravity(GRAVITY_FILL);
final ViewPager viewPager = (ViewPager)findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
#Override
public void onTabSelected(TabLayout.Tab tab){
viewPager.setCurrentItem(tab.getPosition());
}
public void onTabUnSelected(TabLayout.Tab tab){
}
public void onTabReSelected(TabLayout.Tab tab){
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu){
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item){
int id = item.getItemId();
if(id == R.id.action_settings){
return true;
}
return super.onOptionsItemSelected(item);
}
}
You have a typo: onTabReSelected instead of onTabReselected.
This is my MainActivity.java. I have an error when I called a tabbed fragment inside it. the error is in the line
fragment = new FriendsFragment();
MainActivity.java
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.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.View;
import android.widget.Toast; import info.androidhive.materialdesign.R;
public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener {
private static String TAG = MainActivity.class.getSimpleName();
private Toolbar mToolbar;
private FragmentDrawer drawerFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
drawerFragment = (FragmentDrawer)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), mToolbar);
drawerFragment.setDrawerListener(this);
// display the first navigation drawer view on app launch
displayView(0);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id == R.id.action_search){
Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onDrawerItemSelected(View view, int position) {
displayView(position);
}
private void displayView(int position) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (position) {
case 0:
fragment = new HomeFragment();
title = getString(R.string.title_home);
break;
case 1:
fragment = new FriendsFragment();
title = getString(R.string.title_friends);
break;
case 2:
fragment = new MessagesFragment();
title = getString(R.string.title_messages);
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle(title);
}
}
}
my friendsfragment is extended with appcompatactivity. could you help me how to clear the error. the friendsfragment.java is also attached here
FriendsFragment.java
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import info.androidhive.materialdesign.R;
import info.androidhive.materialdesign.adapter.PagerAdapter;
public class FriendsFragment extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_friends);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
The error is
Error:(85, 28) error: incompatible types: FriendsFragment cannot be converted to Fragment
Your FriendsFragment cannot be converted to fragment and that is correct because it is not a fragment, it is an activity, instead of extending from AppCompatActivity it should extend from Fragment or FragmentActivity.
This should make it work, happy coding.
Your FriendsFragement is extending AppCompatActivity...
You have to change
public class FriendsFragment extends AppCompatActivity {
to
public class FriendsFragment extends Fragment {
and make other changes is your FriendsFragment accordingly...
**You cant cast Activity to Fragment....