src/geniuz/myPathbutton/myAnimations.java

package geniuz.myPathbutton;

import java.util.ArrayList;

import java.util.List;

import com.nineoldandroids.animation.Animator;

import com.nineoldandroids.animation.Animator.AnimatorListener;

import com.nineoldandroids.view.ViewPropertyAnimator;

import android.util.Log;

import android.view.View;

import android.view.ViewGroup;

import android.view.animation.Animation;

import android.view.animation.Animation.AnimationListener;

import android.view.animation.AnticipateInterpolator;

import android.view.animation.OvershootInterpolator;

import android.view.animation.RotateAnimation;

import android.view.animation.TranslateAnimation;

import android.widget.LinearLayout;

import android.widget.RelativeLayout.LayoutParams;

import android.widget.RelativeLayout;

import static com.nineoldandroids.view.ViewPropertyAnimator.animate;

public class myAnimations {

	public final int R; // 半徑

	public static byte RIGHTBOTTOM = 1, CENTERBOTTOM = 2, LEFTBOTTOM = 3,

			LEFTCENTER = 4, LEFTTOP = 5, CENTERTOP = 6, RIGHTTOP = 7,

			RIGHTCENTER = 8;

	private int pc; // 位置代號

	private ViewGroup clayout; // 父laoyout

	private final int amount; // 有幾多個按鈕

	private double fullangle = 180.0;// 在幾大嘅角度內排佈

	private byte xOri = 1, yOri = 1; // x、y值嘅方向，即系向上還是向下

	private boolean isOpen = false;// 记录是已经打开还是关闭

	private List<ViewPropertyAnimator> viewAnimators = new ArrayList<ViewPropertyAnimator>();

	/**

	 * 構造函數

	 *

	 * @param comlayout

	 *            包裹彈出按鈕嘅layout

	 * @param poscode

	 *            位置代號，分別對應RIGHTBOTTOM、CENTERBOTTOM、LEFTBOTTOM、LEFTCENTER、

	 *            LEFTTOP、CENTERTOP、RIGHTTOP、RIGHTCENTER

	 * @param radius

	 *            半徑

	 */

	public myAnimations(ViewGroup comlayout, int poscode, int radius) {

		this.pc = poscode;

		this.clayout = comlayout;

		this.amount = clayout.getChildCount();

		this.R = radius;

		// 初始化动画，每个view对应一个animator

		for (int i = 0; i < amount; i++) {

			View childAt = clayout.getChildAt(i);

			ViewPropertyAnimator anim = animate(childAt);

			viewAnimators.add(anim);

		}

		if (poscode == RIGHTBOTTOM) { // 右下角

			fullangle = 90;

			xOri = -1;

			yOri = -1;

		} else if (poscode == CENTERBOTTOM) {// 中下

			fullangle = 180;

			xOri = -1;

			yOri = -1;

		} else if (poscode == LEFTBOTTOM) { // 左下角

			fullangle = 90;

			xOri = 1;

			yOri = -1;

		} else if (poscode == LEFTCENTER) { // 左中

			fullangle = 180;

			xOri = 1;

			yOri = -1;

		} else if (poscode == LEFTTOP) { // 左上角

			fullangle = 90;

			xOri = 1;

			yOri = 1;

		} else if (poscode == CENTERTOP) { // 中上

			fullangle = 180;

			xOri = -1;

			yOri = 1;

		} else if (poscode == RIGHTTOP) { // 右上角

			fullangle = 90;

			xOri = -1;

			yOri = 1;

		} else if (poscode == RIGHTCENTER) { // 右中

			fullangle = 180;

			xOri = -1;

			yOri = -1;

		}

	}

	private class AnimListener implements AnimatorListener {

		private View target;

		public AnimListener(View _target) {

			target = _target;

		}

		@Override

		public void onAnimationStart(Animator animation) {

		}

		@Override

		public void onAnimationEnd(Animator animation) {

			if (!isOpen) {

				target.setVisibility(View.INVISIBLE);

			}

		}

		@Override

		public void onAnimationCancel(Animator animation) {

			// TODO Auto-generated method stub

		}

		@Override

		public void onAnimationRepeat(Animator animation) {

			// TODO Auto-generated method stub

		}

	}

	/**

	 * 彈幾個按鈕出嚟

	 *

	 * @param durationMillis

	 *            用幾多時間

	 */

	public void startAnimationsIn(int durationMillis) {

		isOpen = true;

		for (int i = 0; i < clayout.getChildCount(); i++) {

			final LinearLayout inoutimagebutton = (LinearLayout) clayout

					.getChildAt(i);

			double offangle = fullangle / (amount - 1);

			final double deltaY, deltaX;

			if (pc == LEFTCENTER || pc == RIGHTCENTER) {

				deltaX = Math.sin(offangle * i * Math.PI / 180) * R;

				deltaY = Math.cos(offangle * i * Math.PI / 180) * R;

			} else {

				deltaY = Math.sin(offangle * i * Math.PI / 180) * R;

				deltaX = Math.cos(offangle * i * Math.PI / 180) * R;

			}

			ViewPropertyAnimator viewPropertyAnimator = viewAnimators.get(i);

			viewPropertyAnimator.setListener(null);

			inoutimagebutton.setVisibility(View.VISIBLE);

			viewPropertyAnimator.x(

					(float) (inoutimagebutton.getLeft() + xOri * deltaX)).y(

					(float) (inoutimagebutton.getTop() + yOri * deltaY));

		}

	}

	/**

	 * 收埋幾個按鈕入去

	 *

	 * @param durationMillis

	 *            用幾多時間

	 */

	public void startAnimationsOut(int durationMillis) {

		isOpen = false;

		for (int i = 0; i < clayout.getChildCount(); i++) {

			final LinearLayout inoutimagebutton = (LinearLayout) clayout

					.getChildAt(i);

			ViewPropertyAnimator viewPropertyAnimator = viewAnimators.get(i);

			viewPropertyAnimator.setListener(null);

			viewPropertyAnimator.x((float) inoutimagebutton.getLeft()).y(

					(float) inoutimagebutton.getTop());

			viewPropertyAnimator

					.setListener(new AnimListener(inoutimagebutton));

		}

	}

	/**

	 * 獲取位置代碼（其實貌似都冇乜用）

	 */

	public int getPosCode() {

		return this.pc;

	}

	/**

	 * 自轉函數（原本就有嘅靜態函數，未實體化都可以調用）

	 *

	 * @param fromDegrees

	 *            從幾多度

	 * @param toDegrees

	 *            到幾多度

	 * @param durationMillis

	 *            轉幾耐

	 */

	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;

	}

}

 Desktop version