android 左方向的扇形统计进度 android 扇形菜单

前言

最近的项目中用到了一个弹射式扇形菜单按钮，于是就这这里写一下，分享给大家，自己也做一个积累。

细节在于观察，成功在于积累。

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好了我也不多废话了我们就先手来个效果图吧。

这个Gif的效果简直亮瞎了我的眼，算了不谈论这个了，凑合着看看吧。

完成这个效果之前我们先做一件事情，看了这个以后，或许你就能明白大部分的意思了。
其实完成这个效果很简单，其实用到的更本就是一个联合动画的实现。

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先来看看这个效果

这段效果是怎么实现的呢？
先看XML:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_margin="10dp"
        android:text="按钮" />

    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_margin="15dp"
        android:background="#da7979"
        android:padding="5dp"
        android:text="洒家卖蘑菇"
        android:textColor="#ffffff"
        android:visibility="gone" />
</RelativeLayout>

代码部分：

ObjectAnimator animator = ObjectAnimator.ofFloat(tv1, "translationX", 0, -300);
 animator.setDuration(1000);
 animator.start();

分析一下：
简单的说一下ObjectAnimator，ObjectAnimator是属性动画的一种。

例子当中：

ObjectAnimator animator = ObjectAnimator.ofFloat(tv1, "translationX", 0, -300);
 ObjectAnimator animator = ObjectAnimator.ofFloat("执行动画的控件名字", "执行什么样的动画","开始位置", "结束位置");

ObjectAnimator的构造方法

public static ObjectAnimator ofFloat(Object target, String propertyName, float... values) {...}

后面是一个可变的参数所以我们还可以这么用

ObjectAnimator animator = ObjectAnimator.ofFloat(tv1, "translationX", 0, -300, -200, -100, -300, 0);

看下换成这样的效果。

相信你应该懂得起我的意思了。哈哈。。

好了还是在哔哔回来吧，我们要叫控件移动，旋转，渐变，缩放一起出现这样我们该怎么做呢？

ObjectAnimator one = ObjectAnimator.ofFloat(tv1, "translationX", 0, -300);
ObjectAnimator two = ObjectAnimator.ofFloat(tv1, "translationY", 0, -300);
ObjectAnimator three = ObjectAnimator.ofFloat(tv1, "rotation", 0, 360);
ObjectAnimator four = ObjectAnimator.ofFloat(tv1, "scaleX", 0f, 1f);
ObjectAnimator five = ObjectAnimator.ofFloat(tv1, "scaleY", 0f, 1f);
ObjectAnimator six = ObjectAnimator.ofFloat(tv1, "alpha", 0f, 1);
AnimatorSet set = new AnimatorSet();
set.playTogether(one, two, three, four, five, six);
set.setDuration(2000);
set.start();

translationX：X方向移动
translationY：Y方向移动
rotation：中心点旋转（rotationX：围绕X轴旋转，rotationY：围绕Y轴旋转）
scaleX：X轴方向缩放
scaleY：Y轴方向缩放
alpha：渐变
set.playTogether：所有动画一起播放
set.playSequentially：依次播放

单独的动画效果可以自己试一试，这里就不提了。

然后看下效果图：

相信到这里已经很清楚开篇的效果是怎么实现的了。

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好的看下开篇效果的XML文件：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <Button
        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" />

    <TextView
        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" />

    <TextView
        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" />


    <TextView
        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" />


    <TextView
        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" />


    <TextView
        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" />

</RelativeLayout>

很简单哇。

再看下Java代码分析：

/**
     * 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);
        set.setInterpolator(new BounceInterpolator());
        set.start();
    }

其他代码不多说分析下面这段是怎么计算每个控件在X和Y方向上平移的距离的。

double angle = Math.toRadians(180) / (num - 1) * index;
 int translationX = -(int) (radius * Math.cos(angle));
 int translationY = -(int) (radius * Math.sin(angle));

角度转化为弧度

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

计算X,Y的距离

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

这三角函数的知识就不多说了。

主要的内容就这些了放上源码：

public class MainActivity extends AppCompatActivity {
    private Button button = null;
    private TextView tv1, 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, 0, 5, 300);
                    openAnim(tv2, 1, 5, 300);
                    openAnim(tv3, 2, 5, 300);
                    openAnim(tv4, 3, 5, 300);
                    openAnim(tv5, 4, 5, 300);
                } else {
                    LockMenu = false;
                    closeAnim(tv1, 0, 5, 300);
                    closeAnim(tv2, 1, 5, 300);
                    closeAnim(tv3, 2, 5, 300);
                    closeAnim(tv4, 3, 5, 300);
                    closeAnim(tv5, 4, 5, 300);
                }
            }
        });

    }

    /**
     * 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(2000);
        //回弹效果
        set.setInterpolator(new BounceInterpolator());
        set.start();
    }
}

收工搞定！