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TextView Animation or Alpha animation (FadeIn , FadeOut) in ANDROID

Posted by Unknown Jumat, 19 April 2013 0 komentar

An Alpha Animation is animation that controls the alpha level of an object, i.e. fading it in and out. In Android, you can apply that fading effect to almost anything, from simple text, to images, buttons, check boxes, etc…

This can be done both from xml and from java class.

Here I will explain a simple way to give a FadeIn and FadeOut for a textview on button click..

 

public class Textviewanimation extends Activity {
 
 Animation fadeIn,fadeOut;
 TextView tv;
 Button startanimation;
 Boolean fadeflag=true;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_textviewanimation);
        
        tv=(TextView) findViewById(R.id.textview);
        startanimation=(Button) findViewById(R.id.button1);
        
        fadeIn = new AlphaAnimation(0.0f , 1.0f ) ; 
  fadeIn.setDuration(1200);
  fadeIn.setFillAfter(true);
  
  fadeOut = new AlphaAnimation(1.0f , 0.0f);
  fadeOut.setDuration(1200);
  fadeOut.setFillAfter(true);
  
  startanimation.setText("Start fadeIn");
  startanimation.setOnClickListener(new OnClickListener() {
   
   @Override
   public void onClick(View arg0) {
    
    if(fadeflag)
    {
     startanimation.setText("Start fadeOut");
     tv.setText("This is an animated textview");
     tv.startAnimation(fadeIn);
     fadeflag=false;
    }
    else
    {
     startanimation.setText("Start fadeIn");
     tv.setText("This is an animated textview");
     tv.startAnimation(fadeOut);
     fadeflag=true;
    } } });
               }   
           }

This same can be done with xml by creating an xml in res/anim/fadein

and res/anim/fadeout

Then in java

 
Animation animationFadeIn = AnimationUtils.loadAnimation(this,R.anim.fadein);
tv.startAnimation(animationFadeIn);

same way call the other

Scaling animation..

Falling animation ..

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Judul: TextView Animation or Alpha animation (FadeIn , FadeOut) in ANDROID
Ditulis oleh Unknown
Rating Blog 5 dari 5

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