仿扇形菜单动画效果
记得在eoe上有人发过，但代码质量不好。我重写了一下，抽成了控件。但没有经过各种控件的相容性测试，如果和其他控件的相容性不好，就直接在activity中写代码吧，应该差不多的。
我用的是平板，所以效果还行，不知道手机如何。
代码：
package com.ql.view;import android.R.anim;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.view.animation.ScaleAnimation;import android.view.animation.TranslateAnimation;import android.view.animation.Animation.AnimationListener;import android.widget.Button;import android.widget.RelativeLayout;import com.ql.app.R;public class AnimButtons extends RelativeLayout{private Context context;private int leftMargin=0,bottomMargin=0;private final int buttonWidth=58;//图片宽高private final int r=180;//半径private final int maxTimeSpent=200;//最长动画耗时private final int minTimeSpent=80;//最短动画耗时private int intervalTimeSpent;//每相邻2个的时间间隔private Button[] btns;private Button btn_menu;private RelativeLayout.LayoutParams params;private boolean isOpen = false;//是否菜单打开状态private float angle;//每个按钮之间的夹角public AnimButtons(Context context) {super(context);// TODO Auto-generated constructor stubthis.context=context;}public AnimButtons(Context context, AttributeSet attrs) {super(context, attrs);// TODO Auto-generated constructor stubthis.context=context;}@Overrideprotected void onFinishInflate() {// TODO Auto-generated method stubsuper.onFinishInflate();View view=LayoutInflater.from(context).inflate(R.layout.anim_buttons, this);initButtons(view);}private void initButtons(View view){// TODO Auto-generated method stub//6个按钮，具体视情况而定btns=new Button[6];btns[0] = (Button) view.findViewById(R.id.btn_camera);btns[1] = (Button) view.findViewById(R.id.btn_with);btns[2] = (Button) view.findViewById(R.id.btn_place);btns[3] = (Button) view.findViewById(R.id.btn_music);btns[4] = (Button) view.findViewById(R.id.btn_thought);btns[5] = (Button) view.findViewById(R.id.btn_sleep);btn_menu = (Button) view.findViewById(R.id.btn_menu);leftMargin=((RelativeLayout.LayoutParams)(btn_menu.getLayoutParams())).leftMargin;bottomMargin=((RelativeLayout.LayoutParams)(btn_menu.getLayoutParams())).bottomMargin;for(int i=0;i<btns.length;i++){btns[i].setLayoutParams(btn_menu.getLayoutParams());//初始化的时候按钮都重合btns[i].setTag(String.valueOf(i));btns[i].setOnClickListener(clickListener);}intervalTimeSpent=(maxTimeSpent-minTimeSpent)/btns.length;//20angle=(float)Math.PI/(2*(btns.length-1));}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {// TODO Auto-generated method stubsuper.onSizeChanged(w, h, oldw, oldh);final int bottomMargins=this.getMeasuredHeight()-buttonWidth-bottomMargin;//Log.i("tag", "bottomMargins====="+bottomMargins);btn_menu.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubif(!isOpen){isOpen = true;//btn_menu.startAnimation(animRotate(-45.0f, 0.5f, 0.45f));for(int i=0;i<btns.length;i++){float xLenth=(float)(r*Math.sin(i*angle));float yLenth=(float)(r*Math.cos(i*angle));//Log.i("tag", "xLenth======"+xLenth+",yLenth======"+yLenth);btns[i].startAnimation(animTranslate(xLenth, -yLenth, leftMargin+(int)xLenth, bottomMargins - (int)yLenth, btns[i], minTimeSpent+i*intervalTimeSpent));}}else{isOpen = false;//btn_menu.startAnimation(animRotate(90.0f, 0.5f, 0.45f));for(int i=0;i<btns.length;i++){float xLenth=(float)(r*Math.sin(i*angle));float yLenth=(float)(r*Math.cos(i*angle));//Log.i("tag", "xLenth======"+xLenth+",yLenth======"+yLenth);btns[i].startAnimation(animTranslate(-xLenth, yLenth, leftMargin, bottomMargins, btns[i], maxTimeSpent-i*intervalTimeSpent));}}}});}private Animation animScale(float toX, float toY){// TODO Auto-generated method stubAnimation animation = new ScaleAnimation(1.0f, toX, 1.0f, toY, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);animation.setInterpolator(context, anim.accelerate_decelerate_interpolator);animation.setDuration(400);animation.setFillAfter(false);return animation;}private Animation animRotate(float toDegrees, float pivotXValue, float pivotYValue){// TODO Auto-generated method stubfinal Animation animation = new RotateAnimation(0, toDegrees, Animation.RELATIVE_TO_SELF, pivotXValue, Animation.RELATIVE_TO_SELF, pivotYValue);animation.setAnimationListener(new AnimationListener(){@Overridepublic void onAnimationStart(Animation animation){// TODO Auto-generated method stub}@Overridepublic void onAnimationRepeat(Animation animation){// TODO Auto-generated method stub}@Overridepublic void onAnimationEnd(Animation animation){// TODO Auto-generated method stubanimation.setFillAfter(true);}});return animation;}private Animation animTranslate(float toX, float toY, final int lastX, final int lastY,final Button button, long durationMillis){// TODO Auto-generated method stubAnimation animation = new TranslateAnimation(0, toX, 0, toY);animation.setAnimationListener(new AnimationListener(){@Overridepublic void onAnimationStart(Animation animation){// TODO Auto-generated method stub}@Overridepublic void onAnimationRepeat(Animation animation) {// TODO Auto-generated method stub}@Overridepublic void onAnimationEnd(Animation animation){// TODO Auto-generated method stubparams = new RelativeLayout.LayoutParams(0, 0);params.height = buttonWidth;params.width = buttonWidth;params.setMargins(lastX, lastY, 0, 0);button.setLayoutParams(params);button.clearAnimation();}});animation.setDuration(durationMillis);return animation;}View.OnClickListener clickListener=new View.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubint selectedItem=Integer.parseInt((String)v.getTag());for(int i=0;i<btns.length;i++){if(i==selectedItem){btns[i].startAnimation(animScale(2.0f, 2.0f));}else{btns[i].startAnimation(animScale(0.0f, 0.0f));}}if(onButtonClickListener!=null){onButtonClickListener.onButtonClick(v, selectedItem);}}};public boolean isOpen(){return isOpen;}private OnButtonClickListener onButtonClickListener;public interface OnButtonClickListener{void onButtonClick(View v,int id);}public void setOnButtonClickListener(OnButtonClickListener onButtonClickListener){this.onButtonClickListener=onButtonClickListener;}}<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent"android:layout_height="fill_parent" android:background="#FFF"><Button android:id="@+id/btn_sleep"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_sleep"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_thought"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_thought"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_music"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_music"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_place"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_place"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_with"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_with"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_camera"android:layout_width="wrap_content" android:layout_height="wrap_content"android:background="@drawable/composer_camera"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"/><Button android:id="@+id/btn_menu"android:layout_width="58dip" android:layout_height="58dip"android:background="@drawable/friends_delete"android:layout_alignParentLeft="true"android:layout_alignParentBottom="true"android:layout_marginLeft="10dip"android:layout_marginBottom="10dip"/></RelativeLayout>
public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); AnimButtons animButtons=(AnimButtons)findViewById(R.id.animButtons); animButtons.setOnButtonClickListener(new AnimButtons.OnButtonClickListener() {@Overridepublic void onButtonClick(View v, int id) {// TODO Auto-generated method stubLog.i("tag", "id============="+id);}}); }<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /><!-- layout_width，layout_height最好是fill_parent参数 --><com.ql.view.AnimButtons android:id="@+id/animButtons" android:layout_width="fill_parent" android:layout_height="fill_parent" /></LinearLayout>