炫酷弹射状菜单

直接上布局

<?xml version="1.0" encoding="utf-8"?>

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    >

        android:id="@+id/button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_margin="5dp"

        android:text="按钮"

        android:textSize="16dp" />

        android:id="@+id/tv1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="5dp"

        android:background="#df8a8a"

        android:padding="8dp"

        android:text="洒"

        android:textSize="16sp"

        android:visibility="gone" />

        android:id="@+id/tv2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="5dp"

        android:background="#d4bb69"

        android:padding="8dp"

        android:text="家"

        android:textSize="16sp"

        android:visibility="gone" />

        android:id="@+id/tv3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="5dp"

        android:background="#76ce89"

        android:padding="8dp"

        android:text="卖"

        android:textSize="16sp"

        android:visibility="gone" />

        android:id="@+id/tv4"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="5dp"

        android:background="#67b7dc"

        android:padding="8dp"

        android:text="蘑"

        android:textSize="16sp"

        android:visibility="gone" />

        android:id="@+id/tv5"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="5dp"

        android:background="#d090e7"

        android:padding="8dp"

        android:text="菇"

        android:textSize="16sp"

        android:visibility="gone" />

然后是代码

package com.example.tanshemenu;

import android.animation.AnimatorSet;

import android.animation.ObjectAnimator;

import android.os.Bundle;

import android.support.annotation.Nullable;

import android.support.v7.app.AppCompatActivity;

import android.util.Log;

import android.view.View;

import android.view.animation.BounceInterpolator;

import android.widget.Button;

import android.widget.TextView;

public class MainActivityextends AppCompatActivity {

private Buttonbutton =null;

private TextViewtv1,tv2,tv3,tv4,tv5 =null;

private boolean LockMenu =false;

@Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

button = (Button) findViewById(R.id.button);

tv1 = (TextView) findViewById(R.id.tv1);

tv2 = (TextView) findViewById(R.id.tv2);

tv3 = (TextView) findViewById(R.id.tv3);

tv4 = (TextView) findViewById(R.id.tv4);

tv5 = (TextView) findViewById(R.id.tv5);

button.setOnClickListener(new View.OnClickListener() {

@Override

            public void onClick(View v) {

if (!LockMenu) {

LockMenu =true;

openAnim(tv1,2,5,200);

openAnim(tv2,2,5,500);

openAnim(tv3,2,5,800);

openAnim(tv4,2,5,1100);

openAnim(tv5,2,5,1400);

}else {

LockMenu =false;

closeAnim(tv1,2,5,200);

closeAnim(tv2,2,5,500);

closeAnim(tv3,2,5,800);

closeAnim(tv4,2,5,1100);

closeAnim(tv5,2,5,1400);

}

}

});

}

/**

* 打开菜单

* view:动画控件

* index：第几个控件

* num:有几个控件

* radius：扇形半径

*/

    public void openAnim(View view,int index,int num,int radius) {

if (view.getVisibility() != View.VISIBLE) {

view.setVisibility(View.VISIBLE);

}

double angle = Math.toRadians(180) / (num -1) * index;

int translationX = -(int) (radius * Math.cos(angle));

int translationY = -(int) (radius * Math.sin(angle));

ObjectAnimator one = ObjectAnimator.ofFloat(view,"translationX",0, translationX);

ObjectAnimator two = ObjectAnimator.ofFloat(view,"translationY",0, translationY);

ObjectAnimator three = ObjectAnimator.ofFloat(view,"rotation",0,360);

ObjectAnimator four = ObjectAnimator.ofFloat(view,"scaleX",0f,1f);

ObjectAnimator five = ObjectAnimator.ofFloat(view,"scaleY",0f,1f);

ObjectAnimator six = ObjectAnimator.ofFloat(view,"alpha",0f,1);

AnimatorSet set =new AnimatorSet();

set.playTogether(one, two, three, four, five, six);

set.setDuration(2000);

//回弹效果

        set.setInterpolator(new BounceInterpolator());

set.start();

}

//关闭菜单

    public void closeAnim(View view,int index,int num,int radius) {

if (view.getVisibility() != View.VISIBLE) {

view.setVisibility(View.VISIBLE);

}

double angle = Math.toRadians(180) / (num -1) * index;

Log.e("angle", angle +"");

int translationX = -(int) (radius * Math.cos(angle));

int translationY = -(int) (radius * Math.sin(angle));

ObjectAnimator one = ObjectAnimator.ofFloat(view,"translationX", translationX,0);

ObjectAnimator two = ObjectAnimator.ofFloat(view,"translationY", translationY,0);

ObjectAnimator three = ObjectAnimator.ofFloat(view,"rotation",0,360);

ObjectAnimator four = ObjectAnimator.ofFloat(view,"scaleX",1f,0f);

ObjectAnimator five = ObjectAnimator.ofFloat(view,"scaleY",1f,0f);

ObjectAnimator six = ObjectAnimator.ofFloat(view,"alpha",1f,0f);

AnimatorSet set =new AnimatorSet();

set.playTogether(one, two, three, four, five, six);

set.setDuration(1000);

//回弹效果

        set.setInterpolator(new BounceInterpolator());

set.start();

}

}