Android Open Source - SimpleReader Path Animations

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Back to project page SimpleReader.
License

The source code is released under:
Apache License
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Java Source Code

package com.dreamteam.custom.ui;
/*from  w  ww  .j  a v a2 s.c o  m*/
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.animation.Animation;
import android.view.animation.AnticipateInterpolator;
import android.view.animation.OvershootInterpolator;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageButton;

public class PathAnimations {

  private static int xOffset = 16;
  private static int yOffset = -13;

  /**
   * ????
   */
  public static Animation getScaleAnimation(float fromX, float toX,
      float fromY, float toY, int durationMillis) {
    ScaleAnimation scale = new ScaleAnimation(fromX, toX, fromY, toY,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    scale.setDuration(durationMillis);
    scale.setFillAfter(true);
    return scale;
  }
  
  /**
   * ????
   */
  public static Animation getRotateAnimation(float fromDegrees,
      float toDegrees, int durationMillis) {
    RotateAnimation rotate = new RotateAnimation(fromDegrees, toDegrees,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    rotate.setDuration(durationMillis);
    rotate.setFillAfter(true);
    return rotate;
  }

  public static void initOffset(Context context) {
    /* 
     * density:????????????????????,????160?
     * ???density=160??1dp = 1px, density=240?, 1dp = (240/160) px = 1.5px.
     */
    xOffset = (int) (10.667 * context.getResources().getDisplayMetrics().density);
    yOffset = -(int) (8.667 * context.getResources().getDisplayMetrics().density);
  }

  public static void startAnimationsIn(ViewGroup viewgroup, int durationMillis) {
    for (int i = 0; i < viewgroup.getChildCount(); i++) {
      ImageButton inoutimagebutton = (ImageButton) viewgroup
          .getChildAt(i);
      inoutimagebutton.setVisibility(View.VISIBLE);
      inoutimagebutton.setFocusable(true);
      inoutimagebutton.setClickable(true);
      MarginLayoutParams mlp = (MarginLayoutParams) inoutimagebutton
          .getLayoutParams();
      Animation animation = new TranslateAnimation(Animation.ABSOLUTE,
          mlp.rightMargin - xOffset, Animation.RELATIVE_TO_SELF, 0F,
          Animation.ABSOLUTE, yOffset + mlp.bottomMargin,
          Animation.RELATIVE_TO_SELF, 0F);

      animation.setFillAfter(true);
      animation.setDuration(durationMillis);
      animation.setStartOffset((i * 100)
          / (-1 + viewgroup.getChildCount()));
      animation.setInterpolator(new OvershootInterpolator(2F));
      inoutimagebutton.startAnimation(animation);
    }
  }

  public static void startAnimationsOut(ViewGroup viewgroup,
      int durationMillis) {
    for (int i = 0; i < viewgroup.getChildCount(); i++) {
      final ImageButton inoutimagebutton = (ImageButton) viewgroup
          .getChildAt(i);
      MarginLayoutParams mlp = (MarginLayoutParams) inoutimagebutton
          .getLayoutParams();
      Animation animation = new TranslateAnimation(0F, mlp.rightMargin
          - xOffset, 0F, yOffset + mlp.bottomMargin);

      animation.setFillAfter(true);
      animation.setDuration(durationMillis);
      animation.setStartOffset(((viewgroup.getChildCount() - i) * 100)
          / (-1 + viewgroup.getChildCount()));
      animation.setInterpolator(new AnticipateInterpolator(2F));
      animation.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation arg0) {
          
        }

        @Override
        public void onAnimationRepeat(Animation arg0) {
        }

        @Override
        public void onAnimationEnd(Animation arg0) {
          inoutimagebutton.setVisibility(View.GONE);
          inoutimagebutton.setFocusable(false);
          inoutimagebutton.setClickable(false);
        }
      });
      inoutimagebutton.startAnimation(animation);
    }

  }

}
Java Source Code List
