这篇文章将为大家详细讲解有关Android如何实现仿网易严选底部弹出菜单效果，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
首先展示效果图如下：
是不是还可以呢，由于代码量不多却注释详细，所以先贴出代码再一一详说:
BottomPopupWindowView类：
public class BottomPopupWindowView extends LinearLayout{
private AnimatorListener animatorListener;
//底部内容的View
private FrameLayout base_view;
//内容的View
private FrameLayout content_view;
//背景的View
private RelativeLayout popup_bg;
//xml加载的View
private View bottomPopouView;
//外部加载的内容View
private View contentView;
//外部加载的底部内容View
private View baseView;
//手势的最小值
private float minVelocity=0;
//加载一次的判断值
private boolean mDrawable=true;
public void setAnimatorListener(AnimatorListener animatorListener) {
this.animatorListener = animatorListener;
}
public void setBaseView(View baseView){
this.baseView=baseView;
}
public void setContextView(View view){
this.contentView=view;
}
public void setContentView(int id){
this.contentView=LayoutInflater.from(getContext()).inflate(id,null);
}
public BottomPopupWindowView(Context context) {
this(context,null);
}
public BottomPopupWindowView(Context context, @Nullable AttributeSet attrs) {
this(context,attrs,0);
}
public BottomPopupWindowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
//初始化各种数值
minVelocity=ViewConfiguration.get(getContext()).getScaledTouchSlop();
bottomPopouView= LayoutInflater.from(getContext()).inflate(R.layout.layout_bottom_popup,null);
base_view=(FrameLayout)bottomPopouView.findViewById(R.id.bottom_view);
content_view=(FrameLayout)bottomPopouView.findViewById(R.id.content_view);
popup_bg=(RelativeLayout)bottomPopouView.findViewById(R.id.popup_bg);
//把整个View都加载在LinearLayout里以显示出来
addView(bottomPopouView);
//背景颜色监听
popup_bg.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
disMissPopupView();
}
});
//屏蔽内容区域点击事件
content_view.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view){}
});
//屏蔽底部内容区域点击事件
base_view.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view){}
});
//内容区域判断是否向下，手势向下就关闭弹框
content_view.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
float y1=0,y2=0;
if(motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
y1 = motionEvent.getY();
}
if(motionEvent.getAction() == MotionEvent.ACTION_UP){
y2 = motionEvent.getY();
if((y2-y1)>minVelocity){
disMissPopupView();
}
}
return false;
}
});
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(mDrawable&&baseView!=null){
//刚开始加载底部内容区域，只需一次就行，多次报错
base_view.addView(baseView);
mDrawable=false;
}
}
public void showPopouView(){
if(contentView!=null){
//开始动画数据
startAnimation();
//开启背景颜色的渐变动画
popup_bg.setVisibility(View.VISIBLE);
popup_bg.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.bp_bottom_bg_in));
//把这个区域全部显示出来
((BottomPopupWindowView)this).setLayoutParams(new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.MATCH_PARENT));
//假如内容区域
content_view.addView(contentView,0);
content_view.setVisibility(View.VISIBLE);
//开启内容区域动画
content_view.setAnimation(AnimationUtils.loadAnimation(getContext(),R.anim.bp_bottom_view_in));
}
}
public void disMissPopupView(){
//开始关闭动画数据
endAnimation();
//开启内容区域动画
content_view.setVisibility(View.GONE);
Animation animation=AnimationUtils.loadAnimation(getContext(),R.anim.bp_bottom_view_out);
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {}
@Override
public void onAnimationRepeat(Animation animation) {}
@Override
public void onAnimationEnd(Animation animation) {
//等内容区域动画结束后，清楚所有View
content_view.removeAllViews();
//开启背景颜色的渐变动画
popup_bg.setVisibility(View.GONE);
popup_bg.setAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.bp_bottom_bg_out));
//把整个控件的大小恢复到底部View区域的大小
RelativeLayout.LayoutParams layoutParams=new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,getViewHeight((BottomPopupWindowView)BottomPopupWindowView.this));
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM,-1);
((BottomPopupWindowView)BottomPopupWindowView.this).setLayoutParams(layoutParams);
}
});
//开始动画
content_view.setAnimation(animation);
}
//获取View的高度
public int getViewHeight(View view){
int width =View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
int height =View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
view.measure(width,height);
return view.getMeasuredHeight();
}
//开始动画数据变化
public void startAnimation(){
ValueAnimator valueAnimator = ValueAnimator.ofInt(0,40);
valueAnimator.setDuration(250);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
if(animatorListener!=null){
animatorListener.startValue((int) valueAnimator.getAnimatedValue());
}
}
});
valueAnimator.start();
}
//结束动画数值变化
public void endAnimation() {
ValueAnimator valueAnimator = ValueAnimator.ofInt(40,0);
valueAnimator.setDuration(250);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
if(animatorListener!=null){
animatorListener.endValue((int) valueAnimator.getAnimatedValue());
}
}
});
valueAnimator.start();
}
}对应的加载的xml布局是：
layout_bottom_popou.xml如下：
