android - cannot load fragment -


hi have problem in line not know why

fragmentmanager manager = getfragmentmanager();         fragmenttransaction trans = manager.begintransaction();         trans.replace(r.id.containerr,new fragmentlastcomments());         trans.commit();

xml

    <?xml version="1.0" encoding="utf-8"?>     <relativelayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:id="@+id/containerr"     android:layoutdirection="ltr">  </relativelayout>

fragment xml

<?xml version="1.0" encoding="utf-8"?> <relativelayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:layoutdirection="ltr">       <linearlayout         android:id="@+id/linearlayout3"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_centervertical="true"         android:layout_margintop="55dp"         android:orientation="vertical">           <textview             android:id="@+id/txt_lastcomments"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_gravity="center"             android:gravity="center"             android:textsize="20dp"             android:layout_marginbottom="10dp"             android:text="last comments" />          <android.support.v7.widget.recyclerview             android:layout_width="match_parent"             android:layout_height="match_parent"             android:layout_marginright="5dp"             android:layout_marginleft="5dp"             android:id="@+id/rv_lastcomments"/>       </linearlayout>     </relativelayout>

this line not working

trans.replace(r.id.containerr,new fragmentlastcomments());

when remove line i'm not getting problem when i'm using line i'm getting problem think problem here

r.id.containerr

i hope me solve this

try way,

fragmentmanager mfragmentmanager=getfragmentmanager(); fragment mfragment = new fragmentlastcomments(); mfragmentmanager          .begintransaction()          .replace(r.id.rl_main_new, fragmentdash, "tag")          .commit();

i hope helps you.


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