this is my first fragment which open a fragment through xml layout
public class ListFrag extends SherlockFragment implements OnItemClickListener
{
Context c;
List<ReferalRow> referal_RowItems;
DoctorDaoImpl doctorDao;
DoctorServiceImpl service;
DoctorValidator doctorValidator;
View layoutView;
ListView doctoListView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
layoutView = inflater.inflate(R.layout.activity_refer_mangmnt, null);
return layoutView;
}
and this is my activity_refer_mangmnt.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="5dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2"
android:padding="2dp">
<ListView
android:id="#+id/listView_refer_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:dividerHeight="1dp"
android:divider="#android:color/black"
android:choiceMode="singleChoice"
android:listSelector="#drawable/list_selector" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/rightpanel_back">
<fragment
android:id="#+id/detail_fragment"
android:tag="detailfrag"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.example.app1.DetailsFrag" />
</LinearLayout>
`</LinearLayout>
and this is my DetailFrag class
public class DetailsFrag extends SherlockFragment
{
ExpandableListView detailList;
TextView tvMessage;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
contentView = inflater.inflate(R.layout.activity_refer_view, null);
detailList = (ExpandableListView) contentView.findViewById(R.id.ep_detail_view);
tvMessage = (TextView)contentView.findViewById(R.id.tv_textView);
return contentView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
if(id==0)
{
detailList.setVisibility(View.GONE);
tvMessage.setText("Click on the item on the left panel to view the details");
}
else
{
detailList.setVisibility(View.VISIBLE);
tvMessage.setVisibility(View.GONE);
}
and this is my onItem click listener in LIstFrag
FragmentTransaction ft = getFragmentManager().beginTransaction();
Fragment lastFrag = getFragmentManager().findFragmentByTag("detailfrag");
if(lastFrag!=null)
ft.remove(lastFrag);
Fragment fragment = Fragment.instantiate(c, DoctorDetailsFrag.class.getName(),arguments);
ft.replace(R.id.detail_fragment, fragment);
ft.commit();
i need when first time i want to display a message in the right panel after click on the item in the list i want to disappear that message. but here the message is not remove from the fragment. its displayed in the backgrnd of new fragment. y it is?
Try:
ft.addToBackStack(null)
after you call: ft.remove(lastFrag);
Perhaps this link can help you to understand this transaction:
http://developer.android.com/guide/components/fragments.html#Transactions
Another way is to to reuse your lastFrag when it's not null. Then you need a method in your DetailFrag that is called from your clickListener.
Related
I want open fragment when I click listitem (fragment) but failed, no error logcat.
fragment_item_two.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="layout.ItemTwoFragment"
xmlns:app="http://schemas.android.com/apk/res-auto">
<!-- TODO: Update blank fragment layout -->
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</FrameLayout>
fragment1 (listview): (ItemTwoFragment.java)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_item_two, container, false);
BottomNavigationView bottomNavigationView = (BottomNavigationView)
view.findViewById(R.id.navigation);
contactList = new ArrayList<>();
lv = (ListView) view.findViewById(R.id.list);
new GetContacts().execute();
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> pa, View v, int p, long id) {
int itm = (int) pa.getItemAtPosition(p);
fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.fragmentContainer, new NewsFragment());
transaction.commit();
}
});
return view;
}
NewsFragment:
public class NewsFragment extends Fragment {
}
fragment_news:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="layout.NewsFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="news fragment" />
</FrameLayout>
how to fix this problem? or can you give me the reference for this case? thanks
you forget to inflate your fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_news, container, false);
// Your code ....
return rootView;
}
I am facing some issues for fragment in Android.
I completed a implementation of ViewPager using two fragment class with its xml layout, An MainActivity and An Adapter.
First Fragment : Linear Layout is Parent as well in second fragment, Linear Layout is parent. I have a button in my first fragment, i want to replace first fragment means switch fragment from first to second.
I am using ViewPager. Kindly Look on my source code.
PagerActivity.java
public class PagerActivity extends FragmentActivity {
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pager);
mViewPager=(ViewPager)findViewById(R.id.viewpager);
/** set the adapter for ViewPager */
mViewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
// mViewPager.notify();
}
}
PagerAdapter.java
public class MyPagerAdapter extends FragmentPagerAdapter {
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
/** Show a Fragment based on the position of the current screen */
if (position == 0) {
return new Welcome();
}else{
return new Locate();
}
}
#Override
public int getCount() {
return 2;
}
}
Welcome.java
Fragment 1
public class Welcome extends Fragment implements GlobalInterFace, View.OnClickListener{
private Button welcomeBtn;
private View v;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_welcome, container, false);
welcomeBtn=(Button)v.findViewById(R.id.welcomeBtn);
findViewById();
setOnClickListener();
return v;
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.welcomeBtn:{
Log.e("click", "click");
Fragment fragment = new Locate();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.parent_linear, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
break;
}
}
}
Locate.java
Fragment 2
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_welcome_pager_two, container, false);
locateMe=(Button)v.findViewById(R.id.locateBtn);
locateMe.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getActivity(), SignUpActivity.class);
startActivity(i);
((Activity) getActivity()).overridePendingTransition(0,0);
}
});
return v;
}
welcome xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/parent_linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/splash_color"
android:weightSum="100">
<RelativeLayout
android:id="#+id/rel1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="50">
<com.rey.material.widget.ImageView
android:id="#+id/welcome_Image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/welcome"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
<RelativeLayout
android:id="#+id/welcomeRelativeTwo"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="50"
android:padding="#dimen/universal_margin4"
>
<com.rey.material.widget.TextView
android:id="#+id/Ready"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/welcome_ready"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textSize="#dimen/universal_margin2"
android:layout_centerInParent="true"
/>
<com.rey.material.widget.TextView
android:id="#+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/welcome_descrition"
android:layout_below="#+id/Ready"
android:textAlignment="center"
android:layout_centerHorizontal="true"
android:layout_marginTop="#dimen/universal_margin"
/>
<com.rey.material.widget.Button
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/welcomeBtn"
app:rd_enable="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/description"
android:text="#string/welcome_btntext"
android:textColor="#color/splash_color"
android:background="#color/colorAccent"
android:layout_marginTop="#dimen/universal_margin2"
/>
</RelativeLayout>
<!-- Your RelativeLayout Items -->
</LinearLayout>
Locate.xml
same as welcome layout only layout id is changed.
When I click on WelcomeBtn, the fragment replacement is not working.mentioned this one in my source code in Welcome.java
please help me.
Your parent parent_linearis instance of LinearLayout if you want to put fragment inside this view you should change your LinearLayout to FrameLayout something like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/parent_linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/splash_color">
//... your other layout goes here
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
And change following part of your code:
fragmentTransaction.replace(R.id.fragment_container, fragment);
i have a tabbed layout with fragments on each page. on the first page there is a user input box and button that when inputted and clicked gives a toast. i would like to store the string of data in my mysql database and populate the list view on another fragment with data stored in the table from mysql. Was wondering how to go about this exactly?
main activity class
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from activity_main.xml
setContentView(R.layout.activity_main);
// Locate the viewpager in activity_main.xml
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
// Set the ViewPagerAdapter into ViewPager
viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
}
public void btnShout(View v) {
//allows for label to be changed to shouted once button is pressed
EditText txtInput = (EditText) findViewById(R.id.txtInput);
TextView lblShout = (TextView) findViewById(R.id.lblShout);
lblShout.setText("Shouted! ");
//allows for toast to be displayed once button is clicked
Toast toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.TOP | Gravity.LEFT, 0, 0);
toast.makeText(MainActivity.this, txtInput.getText() + " Has Been Shouted.", toast.LENGTH_SHORT).show();
}
here is my activity main xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.PagerTabStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:textColor="#000000" />
<ListView
android:id="#+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</android.support.v4.view.ViewPager>
viewpageradapter class
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
final int PAGE_COUNT = 3;
// Tab Titles
private String tabtitles[] = new String[] {"Home","Shouts","Shouts" };
Context context;
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
public Fragment getItem(int position) {
switch (position) {
// Open Fragment home.java
case 0:
FragmentHome fragmenthome = new FragmentHome();
return fragmenthome;
// Open Fragment shouters.java
case 1:
FragmentShouts fragmentshouts = new FragmentShouts();
return fragmentshouts;
case 2:
FragmentShouts fragmentShouts = new FragmentShouts();
return fragmentShouts;
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
here is my tab with the user input (home fragment class)
public class FragmentHome extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragment home.xml
View view = inflater.inflate(R.layout.fragmenthome, container, false);
return view;
}
here is fragment home xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="New Shout"
android:id="#+id/lblShout"
android:layout_marginBottom="134dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/txtInput"
android:layout_alignTop="#+id/lblShout"
android:layout_alignParentStart="true"
android:layout_marginTop="41dp"
android:layout_alignParentEnd="true"
android:hint="Enter New Shout..." />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SHOUT"
android:id="#+id/button"
android:layout_below="#+id/txtInput"
android:layout_centerHorizontal="true"
android:onClick="btnShout" />
</RelativeLayout>
here is the fragment with the listview (shouts fragment class)
public class FragmentShouts extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragment shouts.xml
View view = inflater.inflate(R.layout.fragmentshouts, container, false);
return view;
}
here is the fragment shouts xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:contextClickable="true">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
My FragmentTabHost and ListView works fine until I clicked an item in ListView then change Tab.That is when the Fragments overlap.
Here is the image after clicking an item in ListView then changing from Tab 1(where the ListView resides) to Tab 2(another fragment is called).
http://i904.photobucket.com/albums/ac243/fookywooky/OverlappingFragments_zps2b60e9ab.png
Here is my main activity
public class MainActivity extends FragmentActivity {
private FragmentTabHost hostTab;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
hostTab = (FragmentTabHost)findViewById(android.R.id.tabhost);
//hostTab = (TabHost) findViewById(R.id.tabhost);
hostTab.setup(this,getSupportFragmentManager(), android.R.id.tabcontent);
hostTab.addTab(
hostTab.newTabSpec("tab1").setIndicator("Tab 1",
getResources().getDrawable(android.R.drawable.star_on)),
FragmentTab.class, null);
hostTab.addTab(
hostTab.newTabSpec("tab2").setIndicator("Tab 2",
getResources().getDrawable(android.R.drawable.star_on)),
FragmentTab1.class, null);
hostTab.addTab(
hostTab.newTabSpec("tab3").setIndicator("Tab 3",
getResources().getDrawable(android.R.drawable.star_on)),
FragmentTab2.class, null);
}
And here is my fragment for Tab 1(with ListView)
public class FragmentTab extends ListFragment implements OnItemClickListener {
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String[] values = new String[] { "Ang na Ang na", "Sulakihin", "Somaskidot", "Moko Moko"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
switch(position){
case 0:
// Create new fragment and transaction
Fragment newFragment = new FragmentInListView();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(android.R.id.tabcontent, newFragment);
transaction.addToBackStack(null);
transaction.setTransitionStyle(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
// Commit the transaction
transaction.commit();
break;
default:
}
}
}
I just added 1 fragment for 1 item in the ListView for testing. Still no fragments for Items 2,3 and 4.
Here is my code for the Tab 2.
public class FragmentTab1 extends Fragment {
FragmentActivity main;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment_layout1,
container, false);
TextView tv= (TextView) view.findViewById(R.id.text);
tv.setText("Fragment 2");
return view;
}
}
And here is my activity_main.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/replace"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.app.FragmentTabHost
android:id="#android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabWidget
android:id="#android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal" />
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
</android.support.v4.app.FragmentTabHost>
And here is the xml file for the list view fragment.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
android:id="#+id/tanga" >
<ListView
android:id="#+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
and lastly, here is the xml for Tab 2
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
android:id="#+id/bobo">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical|center_horizontal"
android:text="#string/hello_world"
android:textAppearance="?android:attr/textAppearanceMedium" />
Just feel free to ask if you want anymore code to be posted. I will be grateful for any help or comments. Please help. Thanks in advance.
In a class i am adding a Fragment programatically.
This Fragment contains a Button, which i want to have an onClick implementation.
Here is the class i have:
public class ShareProduct extends SherlockFragmentActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.share_product);
FragmentManager fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
ProductFragment1 fragment = new ProductFragment1();
fragmentTransaction.add(R.id.share_product_parent, fragment);
fragmentTransaction.commit();
Button done_button = (Button) fragment.getView().findViewById(
R.id.done_product_1);
done_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
ProductFragment2 fragment = new ProductFragment2();
fragmentTransaction
.replace(R.id.share_product_parent, fragment);
fragmentTransaction.commit();
}
});
}
}
and my ProductFragment1 class is:
public class ProductFragment1 extends SherlockFragment {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.share_product_1, container, false);
return view;
}
}
and the layout my main class uses is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/share_product_parent"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="right|center_vertical"
android:orientation="horizontal" >
</RelativeLayout>
and the layout my ProductFragment1 uses is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/tv1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="25dp" />
<EditText
android:id="#+id/et1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv1"
android:textSize="25dp" />
<Button
android:id="#+id/done_product_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/et1"
android:text="Done" />
</RelativeLayout>
The problem is:
I am getting a NullPointerException at this line in my main class:
Button done_button = (Button) fragment.getView().findViewById(R.id.done_product_1);
done_button.setOnClickListener ....
when i searched for what getView() on a fragment returns. I found out that it returns the view from onCreateView();
I checked it doesn't return null.
Thank You
You are on the wrong track here. You get the NPE because the Fragments views is not created yet. Fragments also have a lifecycle just like Activities.
What you should be doing is assigning the OnClickListener inside your Fragments onViewCreated() method. And from there... you should create a callback and notify your hosting Activity of the event.