android 仿微博酷安的加号弹出菜单效果

先上效果图

并没有像酷安那样扩展到导航栏，以后有机会可以再研究吧。

使用的PopupWindow实现的，主要部分有

圆形扩展动画；＋ 旋转动画；菜单项弹出动画；背景模糊效果（点击进入该效果github项目）。

参考项目https://blog.csdn.net/SilenceOO/article/details/78976477

先看pop的布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/rel"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <com.ms_square.etsyblur.BlurringView
        android:id="@id/blurring_view"
        android:layout_width="match_parent"
        app:radius="17"
        app:overlayColor="#66eeeeee"
        android:layout_height="match_parent"
        />
    <LinearLayout
        android:id="@+id/lin"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:layout_alignParentBottom="true"
        android:paddingLeft="30dp"
        android:paddingRight="30dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/tv_sbs"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:clickable="true"
            android:gravity="center_horizontal"
            android:layout_marginTop="50dp"
            android:drawablePadding="10dp"
            android:drawableTop="@mipmap/ic_more_sbs"
            android:text="发布身边事"
            android:textColor="@color/col_text2"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/tv_search"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:layout_marginTop="50dp"
            android:clickable="true"
            android:drawablePadding="10dp"
            android:drawableTop="@mipmap/ic_more_search"
            android:gravity="center_horizontal"
            android:text="搜索"
            android:textColor="@color/col_text2"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/tv_course"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_marginTop="50dp"
            android:layout_height="wrap_content"
            android:clickable="true"
            android:drawablePadding="10dp"
            android:drawableTop="@mipmap/ic_more_open_course"
            android:gravity="center_horizontal"
            android:text="我要开课"
            android:textColor="@color/col_text2"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/tv_task"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="50dp"
            android:layout_weight="1"
            android:clickable="true"
            android:drawablePadding="10dp"
            android:drawableTop="@mipmap/ic_more_task"
            android:gravity="center_horizontal"
            android:text="发布任务"
            android:textColor="@color/col_text2"
            android:textSize="15sp" />
    </LinearLayout>

    <RelativeLayout
        android:id="@+id/rel_close"
        android:layout_width="wrap_content"
        android:layout_height="55dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true">

        <ImageView
            android:id="@+id/iv_close"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:background="?attr/selectableItemBackgroundBorderless"
            android:padding="15dp"
            android:src="@mipmap/ic_more_close" />
    </RelativeLayout>


</RelativeLayout>

java代码实现

public class MoreWindow extends PopupWindow implements OnClickListener {

    private Activity mContext;
    private RelativeLayout layout;
    private ImageView close;
    private View bgView;
    private BlurringView blurringView;
    private int mWidth;
    private int mHeight;
    private int statusBarHeight;
    private Handler mHandler = new Handler();

    public MoreWindow(Activity context) {
        mContext = context;
    }

    /**
     * 初始化
     * @param view 要显示的模糊背景View,一般选择跟布局layout
     */
    public void init(View view) {
        Rect frame = new Rect();
        mContext.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        statusBarHeight = frame.top;
        DisplayMetrics metrics = new DisplayMetrics();
        mContext.getWindowManager().getDefaultDisplay()
                .getMetrics(metrics);
        mWidth = metrics.widthPixels;
        mHeight = metrics.heightPixels;

        setWidth(mWidth);
        setHeight(mHeight);

        layout = (RelativeLayout) LayoutInflater.from(mContext).inflate(R.layout.center_music_more_window, null);

        setContentView(layout);

        close = (ImageView) layout.findViewById(R.id.iv_close);
        close.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (isShowing()) {
                    closeAnimation();
                }
            }

        });

        blurringView = (BlurringView) layout.findViewById(R.id.blurring_view);
        blurringView.blurredView(view);//模糊背景

        bgView = layout.findViewById(R.id.rel);
        setOutsideTouchable(true);
        setFocusable(true);
        setClippingEnabled(false);//使popupwindow全屏显示
    }

    public int getNavigationBarHeight(Activity activity) {
        Resources resources = activity.getResources();
        int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
        //获取NavigationBar的高度
        int height = resources.getDimensionPixelSize(resourceId);
        return height;
    }

    /**
     * 显示window动画
     * @param anchor
     */
    public void showMoreWindow(View anchor) {

        showAtLocation(anchor, Gravity.TOP | Gravity.START, 0, 0);
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                try {
                    //圆形扩展的动画
                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
                        int x = mWidth / 2;
                        int y = (int) (mHeight - DensityUtils.fromDpToPx(25));
                        Animator animator = ViewAnimationUtils.createCircularReveal(bgView, x,
                                y, 0, bgView.getHeight());
                        animator.addListener(new AnimatorListenerAdapter() {
                            @Override
                            public void onAnimationStart(Animator animation) {
//                                bgView.setVisibility(View.VISIBLE);
                            }

                            @Override
                            public void onAnimationEnd(Animator animation) {
                                //							layout.setVisibility(View.VISIBLE);
                            }
                        });
                        animator.setDuration(300);
                        animator.start();
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });


            showAnimation(layout);

    }

    private void showAnimation(ViewGroup layout) {
        try {
            LinearLayout linearLayout = layout.findViewById(R.id.lin);
            mHandler.post(new Runnable() {
                @Override
                public void run() {
                    //＋ 旋转动画
                    close.animate().rotation(90).setDuration(400);
                }
            });
            //菜单项弹出动画
            for (int i = 0; i < linearLayout.getChildCount(); i++) {
                final View child = linearLayout.getChildAt(i);
                child.setOnClickListener(this);
                child.setVisibility(View.INVISIBLE);
                mHandler.postDelayed(new Runnable() {

                    @Override
                    public void run() {
                        child.setVisibility(View.VISIBLE);
                        ValueAnimator fadeAnim = ObjectAnimator.ofFloat(child, "translationY", 600, 0);
                        fadeAnim.setDuration(200);
                        KickBackAnimator kickAnimator = new KickBackAnimator();
                        kickAnimator.setDuration(150);
                        fadeAnim.setEvaluator(kickAnimator);
                        fadeAnim.start();
                    }
                }, i * 50 + 100);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * 关闭window动画
     */
    private void closeAnimation() {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                close.animate().rotation(-90).setDuration(400);
            }
        });

        try {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {

                int x = mWidth / 2;
                int y = (int) (mHeight - DensityUtils.fromDpToPx(25));
                Animator animator = ViewAnimationUtils.createCircularReveal(bgView, x,
                        y, bgView.getHeight(), 0);
                animator.addListener(new AnimatorListenerAdapter() {
                    @Override
                    public void onAnimationStart(Animator animation) {
                        //							layout.setVisibility(View.GONE);
                    }

                    @Override
                    public void onAnimationEnd(Animator animation) {
//                        bgView.setVisibility(View.GONE);
                        dismiss();
                    }
                });
                animator.setDuration(300);
                animator.start();
            }
        } catch (Exception e) {
        }
    }

    /**
     * 点击事件处理
     * @param v
     */
    @Override
    public void onClick(View v) {

        if (isShowing()) {
            closeAnimation();
        }

        switch (v.getId()) {
            case R.id.tv_sbs:
                
                break;
            case R.id.tv_search:
                
                break;
            case R.id.tv_course:
               
                break;
            case R.id.tv_task:

                break;
        }
       
    }

}

还有一个菜单项回弹的插值器

import android.animation.TypeEvaluator;

public class KickBackAnimator implements TypeEvaluator<Float> {
	private final float s = 1.70158f;
	float mDuration = 0f;

	public void setDuration(float duration) {
		mDuration = duration;
	}

	public Float evaluate(float fraction, Float startValue, Float endValue) {
		float t = mDuration * fraction;
		float b = startValue.floatValue();
		float c = endValue.floatValue() - startValue.floatValue();
		float d = mDuration;
		float result = calculate(t, b, c, d);
		return result;
	}

	public Float calculate(float t, float b, float c, float d) {
		return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
	}
}

使用：

初始化

        mMoreWindow = new MoreWindow(this);
        mMoreWindow.init(idContainer);

点击+按钮时弹出

    private void showMoreWindow() {
        if (null == mMoreWindow) {
            mMoreWindow = new MoreWindow(this);
            mMoreWindow.init(idContainer);
        }

        mMoreWindow.showMoreWindow(idContainer );
    }

其中的idContainer为当前Activity的跟布局layout。