android - error: Binary XML file line#3: You must supply a layout width attribute -

i'va read answers related these questions , i'm sure none solves problem, i'm getting crazy error, please appreciated

<linearlayout 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:padding="5dip" android:orientation="vertical" >  <textview android:layout_width="match_parent"     android:layout_height="wrap_content"     android:text="@string/title_scaned_value"/>  <textview      android:id="@+id/scanedformat"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:gravity="center"     android:text="@string/title_scaned_value_empty"/>  <textview      android:id="@+id/scanedvalue"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:gravity="center"     android:text="@string/title_scaned_value_empty"/>  <button      android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_margintop="10dp"     android:text="@string/title_scan"     android:onclick="commandscan"/>  <button      android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_margintop="10dp"     android:text="productes"     android:onclick="productes"/> 

my activity related layout works fine, when click button start activity error appears. i'm workin zxing library , here's captureactivity:

package org.example.sherlock_;  import org.example.sherlock_.helpers.exceptionhelper;  import android.content.intent; import android.graphics.bitmap;  import com.google.zxing.result; import com.google.zxing.client.android.result.resulthandler;  public class captureactivity extends com.google.zxing.client.android.captureactivity {  @override public void handledecodeinternally(result rawresult, resulthandler resulthandler, bitmap barcode) {     //super.handledecodeinternally(rawresult, resulthandler, barcode);      try {          intent resultintent = new intent();         resultintent.putextra(com.google.zxing.client.android.intents.scan.result_format, rawresult.getbarcodeformat().tostring());         resultintent.putextra(com.google.zxing.client.android.intents.scan.result, resulthandler.getdisplaycontents());         setresult(result_ok, resultintent);         finish();      } catch (exception e) {         exceptionhelper.manage(this, e);     } } 

}

i post mainactivity because i'm going mad :)

package org.example.sherlock_;     import org.example.sherlock_.helpers.exceptionhelper;  import android.content.intent; import android.os.bundle; import android.view.view; import android.widget.textview; import android.widget.toast;  import com.actionbarsherlock.app.sherlockactivity; import com.actionbarsherlock.view.menu; import com.actionbarsherlock.view.menuinflater; import com.actionbarsherlock.view.menuitem;    public class mainactivity extends sherlockactivity {   private textview scanedvalue; private textview scanedformat; private final static int scan_code_request_code = 123456;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     scanedvalue  = (textview)findviewbyid(r.id.scanedvalue);     scanedformat = (textview)findviewbyid(r.id.scanedformat);      }  @override protected void onactivityresult(int prequestcode, int presultcode, intent pdata) {     try {          if (prequestcode == scan_code_request_code) {             if (presultcode == result_ok) {                  string result = pdata.getstringextra  (com.google.zxing.client.android.intents.scan.result);                 string format = pdata.getstringextra  (com.google.zxing.client.android.intents.scan.result_format);                    if (scanedvalue != null) {                     if (result != null &&  !result.trim().equals("")) {                         scanedvalue.settext(result);                         //if(db != null){                               //string valor= result  ;                         //}                      } else {   scanedvalue.settext(getstring(r.string.title_scaned_value_empty));                     }                 }                  if (scanedformat != null) {                     if (format != null &&   !format.trim().equals("")) {                         scanedformat.settext(format);                         //if(db != null){                         //string tipus = format;                         //}                     } else {  scanedformat.settext(getstring(r.string.title_scaned_value_empty));                     }                 }             } else {                 if (scanedvalue != null)  scanedvalue.settext(getstring(r.string.title_scaned_value_empty));                 if (scanedformat != null)  scanedformat.settext(getstring(r.string.title_scaned_value_empty));             }         }          //insertamos los datos en la tabla usuarios        // db.execsql("insert productes (codi, tipus, valor) " +               //     "values (" + + ", '" + tipus +"', '"+ valor +"')");         // db.close();         //i+=i;      } catch (exception e) {         exceptionhelper.manage(this, e);     }  }  public void commandscan(view pview) {     try {          intent captureintent = new intent(this, captureactivity.class);         captureintent.putextra("scan_mode", "qr_code_mode");         startactivityforresult(captureintent, scan_code_request_code);      } catch (exception e) {         exceptionhelper.manage(this, e);     } }         @override public boolean oncreateoptionsmenu(menu menu) {     // inflate menu; adds items action bar if present.     menuinflater inflater = getsupportmenuinflater();     inflater.inflate(r.menu.main, menu);      return true; }  @override public boolean onoptionsitemselected(menuitem item) {     if (item.getitemid() == r.id.action_settings) {         toast.maketext(this, "configuración pulsado"                 , toast.length_short).show();     }       return true; } }