Skip to main content

Restrict Edittext input content using Input Filters in ANDROID 

InputFilter filter = new InputFilter() {
     public CharSequence filter(CharSequence source, int start, int end,
	    Spanned dest, int dstart, int dend) {
      // TODO Auto-generated method stub
	for (int i = start; i < end; i++) {
	    if (Character.isLetter(source.charAt(i))) {
		     System.out.println("Input consist of only characters from 'a' to 'z'");
		     return "";
		}
	}
	return null;
	} };
    edit.setFilters(new InputFilter[]{filter});
Here the filters will check whether the input content has only characters from 'a' to 'z'.
same way use the condition below to have characters from'a' to 'z' and '0' to '9' and avoid special characters. 
Character.isLetterOrDigit(source.charAt(i))
Labels:

Comments

  1. lezardo8 January 2014 at 01:01

    Hi,

    Is there a way to give user a visual feedback when he enter a wrong value ?

    Thx in advance,

    Simon

    ReplyDelete

Post a Comment

Popular posts from this blog

Spannable String in Android - URL Span ,Clickable Span, Rich-Style Formatting of Textview .....

See more Android Tutorials here....... Faster Loading images in GridViews or ListViews Spannable brings lots of possibility to TextView, includes displaying various appearance of a Text and onClick callbak. The SpannableString class allows you to easily format certain pieces which are called spans of a string, by applying CharacterStyle ie,color, font, ormake it a link . Here is an example where, explained how to use spannable string to give font size, color, linking a text via clickable span and through URL Span and to strike through the text. Lets go through the example : import android.os.Bundle; import android.text.SpannableString; import android.text.method.LinkMovementMethod; import android.text.style.ClickableSpan; import android.text.style.ForegroundColorSpan; import android.text.style.RelativeSizeSpan; import android.text.style.StrikethroughSpan; import android.text.style.URLSpan; import android.view.View; import android.widget.TextView; import android.widget.Toast;
1 comment
Read more

Passing Images between Activities in Android

in First Activity: Intent intent=new Intent(FirstClass.this, SecondClass.class); Bundle bundle=new Bundle(); bundle.putInt("image",R.drawable.ic_launcher); intent.putExtras(bundle); startActivity(intent); in Second Acticity: Bundle bundle=this.getIntent().getExtras(); int pic=bundle.getInt("image"); v.setImageResource(pic); another method: in First Activity: Drawable drawable=imgv.getDrawable(); Bitmap bitmap= ((BitmapDrawable)drawable).getBitmap(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); byte[] b = baos.toByteArray(); Intent intent=new Intent(Passimage.this,myclass.class); intent.putExtra("picture", b); startActivity(intent); in Second Acticity: Bundle extras = getIntent().getExtras(); byte[] b = extras.getByteArray("picture"); Bitmap bmp = BitmapFactory.decodeByteArray(b, 0, b.lengt
6 comments
Read more

Getting started with IBM worklight Mobile App In Eclipse using Ionic / Angularjs

Install Eclipse and add IBM MobileFirst Platform Studio 7.1.0 .  You can follow the following steps : Goto Help > > Eclipse Market Place >> and search for IBM MobileFirst Platform Studio 7.1.0 . and u can add and install thet plugin and get started with ionic - angular app development. You can start the new project and so can add your Environment needed and start development. After creating the sample project you can add ionic bundle folder inside your application so that you get all the necessary features of ionic development. Details and other way of installation is explained here  
Post a Comment
Read more