performance - Making dynamic layout for each row in ListView in android -

i have xml file contains basic layout each row of listview(which realtive layout , has textview inside it).

i want change attributes of layout each row of listview different layout width , height of each row. want set values of width , height dynamically.

is there way around this?

my xml file want change, height , weight dynamically, each view

    <?xml version="1.0" encoding="utf-8"?> <linearlayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_height="wrap_content"     android:id="@+id/item1"     android:layout_width="wrap_content">     <textview         android:id="@+id/text"         android:layout_height="wrap_content"         android:gravity="center_vertical"         android:text="text"         android:visibility="visible"         android:layout_width="wrap_content"         android:textcolor="#ff200010"         android:background="#fffcccff" /> </linearlayout>  

and full file

package com.test.list;  import java.util.arraylist; import java.util.treeset;  import android.app.listactivity; import android.content.context; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.linearlayout; import android.widget.textview;   public class multipleitemslist extends listactivity {      private mycustomadapter madapter;      public context context =getapplicationcontext();       @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         madapter = new mycustomadapter();         (int = 1; < 50; i++) {             madapter.additem("item " + i);             if (i % 4 == 0) {                 madapter.addseparatoritem("separator " + i);             }         }         setlistadapter(madapter);     }      private class mycustomadapter extends baseadapter {          private static final int type_item = 0;         private static final int type_separator = 1;         private static final int type_max_count = type_separator + 1;          private arraylist<string> mdata = new arraylist<string>();         private layoutinflater minflater;          private treeset<integer> mseparatorsset = new treeset<integer>();          public mycustomadapter() {             minflater = (layoutinflater)getsystemservice(context.layout_inflater_service);         }          public void additem(final string item) {             mdata.add(item);             notifydatasetchanged();         }          public void addseparatoritem(final string item) {             mdata.add(item);             // save separator position             mseparatorsset.add(mdata.size() - 1);             notifydatasetchanged();         }          @override         public int getitemviewtype(int position) {             return mseparatorsset.contains(position) ? type_separator : type_item;         }          @override         public int getviewtypecount() {             return type_max_count;         }          @override         public int getcount() {             return mdata.size();         }          @override         public string getitem(int position) {             return mdata.get(position);         }          @override         public long getitemid(int position) {             return position;         }          @override         public view getview(int position, view convertview, viewgroup parent) {             viewholder holder = null;             int type = getitemviewtype(position);             system.out.println("getview " + position + " " + convertview + " type = " + type);             if (convertview == null) {                 holder = new viewholder();                 switch (type) {                     case type_item:                             convertview = minflater.inflate(r.layout.item1,null);                             log.e("ronak", "here1");                             textview t= (textview)convertview.findviewbyid(r.id.text);                             t.setwidth(100);                             t.setheight(600);                             t.settext("this first type of view");                             holder.textview = (textview)convertview.findviewbyid(r.id.text);                             log.e("ronak","reached here3");                             break;                     case type_separator:                            convertview = minflater.inflate(r.layout.item1, null);                           textview t2= (textview)convertview.findviewbyid(r.id.text);                             t2.setwidth(200);                             t2.setheight(500);                             t2.settext("this second type of view");                           holder.textview = (textview)convertview.findviewbyid(r.id.text);                           break;                 }                 convertview.settag(holder);             } else {                 holder = (viewholder)convertview.gettag();             }             holder.textview.settext(mdata.get(position));             return convertview;         }      }      public static class viewholder {         public textview textview;     }  } 

you can implement viewholder pattern adapter, , each position, inflate own layout.

to that, override getview this:

public view getview(int position, view convertview, viewgroup parent) {                 // viewholder keeps references children views avoid unneccessary calls               // findviewbyid() on each row.               viewholder holder;               // when convertview not null, can reuse directly, there no need               // reinflate it. inflate new view when convertview supplied               // listview null.                if (convertview == null) {                      convertview = minflater.inflate(r.layout.sample, null);        // creates viewholder , store references 2 children views                     // want bind data to.                   holder = new viewholder();                    holder.name = (textview) convertview.findviewbyid(r.id.text);                   holder.icon = (imageview) convertview.findviewbyid(r.id.icon);                    convertview.settag(holder);              } else {                    // viewholder fast access textview                    // , imageview.    holder = (viewholder) convertview.gettag();  }                  // bind data efficiently holder.    holder.name.settext(myelements.get(id));    holder.icon.setimagebitmap( micon1 );  return convertview; }   

read more on android developer site here

edit:

to change width , height of each row, can use following, each row on bind data section :

relativelayout rl = (relativelayout) findviewbyid(r.id.yourid);  rl.getlayoutparams().height = 100; rl.getlayoutparams().width = 100;`