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POHow to Pass Data between Fragments?
 

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  1. POHow to Pass Data between Fragments?
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    <p>For all those who are downvoting and voting for this question to be closed thinking it has something to do with the scope of textview.....then have a look,it has nothing to do with the scope of textview</p> <p>Unable to pass data between fragments,the app crashes,i don't know what i am doing wrong...i followed this link <a href="http://manishkpr.webheavens.com/android-passing-data-between-fragments/" rel="nofollow">http://manishkpr.webheavens.com/android-passing-data-between-fragments/</a></p> <p>here is the code i am using Fragment A(this fragment is passing the data)</p> <pre><code>public class FragmentSongs extends Fragment implements Serializable,OnFragmentCreatedListener { ListView SngList; ArrayList&lt;SongDetails&gt; Songinfo=null; AdapterView.AdapterContextMenuInfo info; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { ViewGroup view = (ViewGroup) inflater.inflate(R.layout.fragment_song, null); SngList = (ListView) view.findViewById(R.id.SongList); registerForContextMenu(SngList); //File f=new File(Environment.getExternalStorageDirectory()+"/Music"); File f=new File("/system/"); int j=0;int i=0; getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); Songinfo = getSongsFromDirectory(f); //sorting done below if (Songinfo.size()&gt;0) { for( j=0; j&lt;Songinfo.size();j++) { for ( i=j+1 ; i&lt;Songinfo.size(); i++) { SongDetails a=Songinfo.get(i); SongDetails b=Songinfo.get(j); if(a.getSong().toLowerCase().compareTo(b.getSong().toLowerCase())&lt;0) { Songinfo.set(i,b ); Songinfo.set(j,a); } } } SngList.setAdapter(new CustomAdapter(Songinfo)); return view; } else return null; } OnFragmentCreatedListener listener; @Override public void onAttach(Activity activity) { super.onAttach(activity); try { listener = (OnFragmentCreatedListener) getActivity(); listener.onFragmentCreated(Songinfo); } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement onFragmentCreated"); } } </code></pre> <p>fragment B(the receiver fragment )</p> <pre><code> public class FragmentArtists extends Fragment { ArrayList&lt;SongDetails&gt; songinfo2; ViewGroup view; int s=5;//TextView text; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {Context context; LayoutInflater lf = getActivity().getLayoutInflater(); view = (ViewGroup) inflater.inflate(R.layout.fragment_artist, null); // view = lf.inflate(R.layout.test,container, false); // view = inflater.inflate(R.layout.test,container, false); s=s+5; // text=(TextView)view.findViewById(R.id.tt);when i use this,it works fine but i want to do it in the other method //text.setText("makzzz");when i use this,it works fine but i want to do it in the other method return view; } void setSongList(ArrayList&lt;SongDetails&gt; songinfo) { //TextView text=(TextView)this.getView().findViewById(R.id.tt);//when i used this view was not global TextView text=(TextView)view.findViewById(R.id.tt);//when i used this,view was global; //TextView text=(TextView)view.findViewById(R.id.tt); // text=(TextView)super.getView().findViewById(R.id.tt); text.setText("makzzz"); </code></pre> <p>the method in holder activity (this activity holds the fragments)</p> <pre><code>protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.mymusic); fragments = new Vector&lt;Fragment&gt;(); fragments.add(Fragment.instantiate(this, FragmentSongs.class.getName())); fragments.add(Fragment.instantiate(this, FragmentArtists.class.getName())); fragments.add(Fragment.instantiate(this, FragmentPlaylists.class.getName())); fragments.add(Fragment.instantiate(this, FragmentAlbums.class.getName())); ViewPagerAdapter adapter = new ViewPagerAdapter(super.getSupportFragmentManager(), fragments); ViewPager pager = (ViewPager)super.findViewById(R.id.viewpager); pager.setAdapter(adapter); pager.setOffscreenPageLimit(4); pager.setCurrentItem(0); } public void onFragmentCreated(ArrayList&lt;SongDetails&gt; msg) { FragmentArtists Obj=(FragmentArtists) fragments.get(1); Obj.setSongList(msg); } } </code></pre> <p>the callback class:</p> <pre><code>package sourcecode.jazzplayer; import java.util.ArrayList; public interface OnFragmentCreatedListener { public void onFragmentCreated(ArrayList&lt;SongDetails&gt; msg); } </code></pre> <p>here is the logcat</p> <pre><code> 09-19 23:50:46.851: E/AndroidRuntime(2125): java.lang.NullPointerException 09-19 23:50:46.851: E/AndroidRuntime(2125): at sourcecode.jazzplayer.FragmentArtists.setSongList(FragmentArtists.java:55) 09-19 23:50:46.851: E/AndroidRuntime(2125): at sourcecode.jazzplayer.MyMusic.onFragmentCreated(MyMusic.java:45) 09-19 23:50:46.851: E/AndroidRuntime(2125): at sourcecode.jazzplayer.FragmentSongs.onAttach(FragmentSongs.java:128) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:883) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:823) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.app.Fragment.setUserVisibleHint(Fragment.java:819) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.app.FragmentPagerAdapter.setPrimaryItem(FragmentPagerAdapter.java:130) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.view.ViewPager.populate(ViewPager.java:1066) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.view.ViewPager.populate(ViewPager.java:914) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.View.measure(View.java:12603) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.View.measure(View.java:12603) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1369) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.widget.LinearLayout.measureVertical(LinearLayout.java:660) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.widget.LinearLayout.onMeasure(LinearLayout.java:553) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.View.measure(View.java:12603) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 09-19 23:50:46.851: E/AndroidRuntime(2125): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2072) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.View.measure(View.java:12603) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1044) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2418) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.os.Handler.dispatchMessage(Handler.java:99) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.os.Looper.loop(Looper.java:137) 09-19 23:50:46.851: E/AndroidRuntime(2125): at android.app.ActivityThread.main(ActivityThread.java:4340) 09-19 23:50:46.851: E/AndroidRuntime(2125): at java.lang.reflect.Method.invokeNative(Native Method) 09-19 23:50:46.851: E/AndroidRuntime(2125): at java.lang.reflect.Method.invoke(Method.java:511) 09-19 23:50:46.851: E/AndroidRuntime(2125): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 09-19 23:50:46.851: E/AndroidRuntime(2125): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 09-19 23:50:46.851: E/AndroidRuntime(2125): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>the error is in this line of code</p> <p>TextView text=(TextView)view.findViewById(R.id.tt); //this line is in the receiver fragment (fragmentArtist)</p>
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    1. USAnkit Srivastava
    1. USAnkit Srivastava
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    1. COWe can perhaps help if we know what the crash is. Can you post the logcat?
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      1. USandy256
    2. COPost the logcat... But i think you should use another way to pass data between fragment (widh argument for example)
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      1. USPauland
    3. CO@Pauland please give me the link ,of the other way of passing the data
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      1. USAnkit Srivastava
 

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