Android EditText - Delete the last letter with a button -


i have buttons writes , b edittext. if there in edittext how can delete last letters "del" button? layout:

<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" tools:context=".mainactivity" >  <button     android:id="@+id/buttonb"     android:layout_width="100dp"     android:layout_height="100dp"     android:layout_alignparentleft="true"     android:layout_below="@+id/buttona"     android:text="@string/buttonb"     android:textsize="50sp"     android:textstyle="bold" />  <button     android:id="@+id/buttona"     android:layout_width="100dp"     android:layout_height="100dp"     android:layout_alignparentleft="true"     android:layout_centervertical="true"     android:text="@string/buttona"     android:textsize="50sp"     android:textstyle="bold" />  <button     android:id="@+id/buttondel"     android:layout_width="100dp"     android:layout_height="100dp"     android:layout_alignparentright="true"     android:layout_centervertical="true"     android:text="@string/buttondel"     android:textsize="50sp"     android:textstyle="bold" />  <edittext     android:id="@+id/edittext"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_alignparentleft="true"     android:layout_alignparenttop="true"     android:ems="58"     android:textsize="20sp"     android:textstyle="bold"     android:inputtype="text" >      <requestfocus /> </edittext>  </relativelayout>

and java:

package com.koostamas.keyboard;  import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.widget.edittext; import android.app.activity;  public class mainactivity extends activity implements onclicklistener {  button buttona, buttonb; edittext edittext;  @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); edittext = (edittext) findviewbyid(r.id.edittext);  addlisteneronbutton(); }      public void addlisteneronbutton() {  buttona = (button) findviewbyid(r.id.buttona); buttona.setonclicklistener(this); buttona.gettext(); buttonb = (button) findviewbyid(r.id.buttonb); buttonb.setonclicklistener(this); buttonb.gettext();     }  public void onclick(view v) {      button buttona = (button)v;     edittext.settext(edittext.gettext().tostring()+buttona.gettext().tostring());   }  public void onclick1(view v) {      button buttonb = (button)v;     edittext.settext(edittext.gettext().tostring()+buttonb.gettext().tostring());   } }

so want make it. please me! in advance.

yes can create onclicklistener , text edit text , delete last character. 

button delete = (button) findviewbyid(r.id.buttondel); if( delete != null ) {    delete.setonclicklistener(new onclicklistener() {       @override       public void onclick() {          string textstring = edittext.gettext().tostring();          if( textstring.length() > 0 ) {             edittext.settext(textstring.substring(0, textstring.length() - 1 ));             edittext.setselection(edittext.gettext().length());//position cursor @ end of line          }       }    }); }

edit: don't forget check string length greater 0 before doing in event or b hasn't been pressed when user hits delete.


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