See more Android Tutorials here.......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;
import android.widget.TextView.BufferType;
import android.app.Activity;
import android.graphics.Color;
public class Spannable_String extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spannable__string);
TextView spannabletextview = (TextView)findViewById(R.id.usage);
//********* Simple Span to color text ************//
// this is the text that we going to work on
SpannableString text = new SpannableString("Iam an example for spannable string ");
// make "Iam" (characters 0 to 3) green
text.setSpan(new ForegroundColorSpan(Color.BLUE), 0, 3, 0);
// Put the SpannableString in textview
//**** Relative Span to change text relative to others ****//
//changing the text from 5 to 9 1.5f bigger than textview size
text.setSpan(new RelativeSizeSpan(1.5f), 5, 9, 0);
//************ Clickable Span **************//
// going to make "for" a clickable text and bring a toast
ClickableSpan clickfor = new ClickableSpan() {
@Override
public void onClick(View widget) {
Toast.makeText(Spannable_String.this, "hello clicked for", Toast.LENGTH_LONG).show();
}
};
text.setSpan(clickfor, 15, 18, 0);
//******** Strike through text***********//
text.setSpan(new StrikethroughSpan(), 9, 14, 0);
//******** URL Span *********************//
text.setSpan(new URLSpan("http://eazyprogramming.blogspot.in/"), 22, 26, 0);
//******** ForegroundColor *********************//
text.setSpan(new ForegroundColorSpan(Color.GREEN), 22, 26, 0);
// make our ClickableSpans and URLSpans work
spannabletextview.setMovementMethod(LinkMovementMethod.getInstance());
spannabletextview.setText(text, BufferType.SPANNABLE);
}
}
