title: Easing effect for rotate animation in android
body: <p>I am working on animation for spinning wheel for roulette game, for that i want wheel to be spin like real spin(e.g. wheel spin speed should start slowly then speedily and stop slowly)</p>
  
  <p>I know basic rotate animation which i applied, below is my animation XML file code :  </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;set xmlns:android="http://schemas.android.com/apk/res/android"
      android:interpolator="@android:anim/linear_interpolator"&gt;
  &lt;rotate
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:fromDegrees="0"
      android:toDegrees="360"
      android:duration="200"
      android:repeatMode="restart"
      android:repeatCount="-1"
      android:pivotX="50%"
      android:pivotY="50%"&gt;
  &lt;/rotate&gt;  
  </code></pre>
  
  <p>and in activity :  </p>
  
  <pre><code>public class RouletteActivity extends Activity {
  
  Button button_spin;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_roulette);
     button_spin = (Button)findViewById(R.id.btn_spin);
     button_spin.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View arg0) {
              // TODO Auto-generated method stub
  
  
              StartLoading();
  
              Handler handler = new Handler(); 
              handler.postDelayed(new Runnable() { 
                  public void run() {
                      StopLoading();
                  } 
              }, 5000);
  
          }
      });
  }
  
   public void StartLoading() {
      ImageView img_wheel = (ImageView) this.findViewById(R.id.imageView1);
      img_wheel.setImageDrawable(getResources().getDrawable(R.drawable.wheel));
      Animation rotateLoading = AnimationUtils.loadAnimation(this, R.anim.rotate);
      img_wheel.clearAnimation();
      img_wheel.setAnimation(rotateLoading);
  }
  
  
   public void StopLoading() {
      ImageView img_wheel = (ImageView) this.findViewById(R.id.imageView1);
      if (img_wheel.getAnimation() != null)
      {
          img_wheel.clearAnimation();
          img_wheel.setImageDrawable(getResources().getDrawable(R.drawable.wheel));
  
      }
  }
  </code></pre>
  
  <p>Please help me to achieve animation like what i want, thank you.</p>