PopupWindow简单动画弹窗

写在前面

主要感觉自己对于博客这个东西感觉很手生，现拿一些简单的东西来练练手，先练练等级，然后再去做一些分析类的文章，这样可能会好一点，感觉abcd的代码居然比中文的博客还好写，我也是服了我自己

内容

先来一个简单的PopupWindow弹出效果,主要是showAtLocation()和showAsDropDown()显示的动画效果不同，所以就需要进行统一一下。
主要思路：因为PopupWindow其实也是一个View，所以只要show()的时候对布局显示的时候开始动画，dimiss()的时候开始关闭动画就可以

321.gif

代码

动效 就是简单的上下偏移的动画 这里是可以自己设置

    private Animation createVerticalAnimation(float fromY, float toY) {
        Animation animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
                0f,
                Animation.RELATIVE_TO_SELF,
                0f,
                Animation.RELATIVE_TO_SELF,
                fromY,
                Animation.RELATIVE_TO_SELF,
                toY);
        animation.setDuration(300);
        animation.setInterpolator(new DecelerateInterpolator());
        return animation;
    }

自定义Show方法

public void showPopupWindow(View v) {
        //获取控件的位置坐标
        v.getLocationOnScreen(location);
        //获取自身的长宽高
        mRootView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
        //获取屏幕高度
        int measuredHeight = mRootView.getMeasuredHeight();
        int measuredWidth = mRootView.getMeasuredWidth();
        int width = v.getMeasuredWidth();
        //如果在一半的上方 显示在下面 在一半的下方显示在上面
        if (location[1] > ScreenUtils.getScreenHeight() / 2) {
            showAnim = createVerticalAnimation(1, 0);
            hideAnim = createVerticalAnimation(0, 1);
            mRootView.startAnimation(showAnim);
            this.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] - measuredWidth + width), location[1] - measuredHeight-20);
        } else {
            showAnim = createVerticalAnimation(-1, 0);
            hideAnim = createVerticalAnimation(0, -1);
            mRootView.startAnimation(showAnim);
            this.showAsDropDown(v, -measuredWidth + width, 20);
        }
        hideAnim.setAnimationListener(new AnimListener() {
            @Override
            public void onAnimationEnd(Animation animation) {
                CirclePopupWindow.super.dismiss();
            }
        });
    }

完整代码，布局就不贴了

/**
 * title:点击更多弹窗效果
 * tip:
 *
 * @author zhou
 * @date 2018-10-29 上午10:15
 */
public class CirclePopupWindow extends PopupWindow {

    private List<PopupEntity> mData;
    private Context mContext;
    private View mRootView;
    private Animation showAnim, hideAnim;


    public CirclePopupWindow(Context context, List<PopupEntity> list) {
        super(context);
        mContext = context;
        mData = list;
        initialize();
    }

    private void initialize() {
        mRootView = LayoutInflater.from(mContext).inflate(R.layout.popupwindow, null);
        RecyclerView mRvList = mRootView.findViewById(R.id.rv_list);
        mRvList.setLayoutManager(new LinearLayoutManager(mContext));
        RecyclerPopupAdapter adapter = new RecyclerPopupAdapter();
        adapter.setNewData(mData);
        mRvList.setAdapter(adapter);
        adapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                if (mData != null) {
                    ToastUtils.showShort(mData.get(position).getContent());
                }
            }
        });
        this.setContentView(mRootView);
        this.setBackgroundDrawable(new ColorDrawable(ContextCompat.getColor(mContext, android.R.color.transparent)));
        this.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
        this.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
        this.setFocusable(true);
        this.setOutsideTouchable(true);
        this.update();

    }

    private int[] location = new int[2];

    public void showPopupWindow(View v) {
        //获取控件的位置坐标
        v.getLocationOnScreen(location);
        //获取自身的长宽高
        mRootView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
        //获取屏幕高度
        int measuredHeight = mRootView.getMeasuredHeight();
        int measuredWidth = mRootView.getMeasuredWidth();
        int width = v.getMeasuredWidth();
        //如果在一半的上方 显示在下面 在一半的下方显示在
        if (location[1] > ScreenUtils.getScreenHeight() / 2) {
            showAnim = createVerticalAnimation(1, 0);
            hideAnim = createVerticalAnimation(0, 1);
            mRootView.startAnimation(showAnim);
            this.showAtLocation(v, Gravity.NO_GRAVITY, (location[0] - measuredWidth + width), location[1] - measuredHeight-20);
        } else {
            showAnim = createVerticalAnimation(-1, 0);
            hideAnim = createVerticalAnimation(0, -1);
            mRootView.startAnimation(showAnim);
            this.showAsDropDown(v, -measuredWidth + width, 20);
        }
        hideAnim.setAnimationListener(new AnimListener() {
            @Override
            public void onAnimationEnd(Animation animation) {
                CirclePopupWindow.super.dismiss();
            }
        });
    }

    @Override
    public void dismiss() {
        if (hideAnim != null) {
            mRootView.startAnimation(hideAnim);
        } else {
            super.dismiss();
        }
    }

    private Animation createVerticalAnimation(float fromY, float toY) {
        Animation animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF,
                0f,
                Animation.RELATIVE_TO_SELF,
                0f,
                Animation.RELATIVE_TO_SELF,
                fromY,
                Animation.RELATIVE_TO_SELF,
                toY);
        animation.setDuration(300);
        animation.setInterpolator(new DecelerateInterpolator());
        return animation;
    }

    public class AnimListener implements Animation.AnimationListener {
        @Override
        public void onAnimationStart(Animation animation) {}

        @Override
        public void onAnimationEnd(Animation animation) {}

        @Override
        public void onAnimationRepeat(Animation animation) {}
    }
}