之前在一個技術群裡面有位同學請教大家這種彈出窗怎麼做(如下圖所示),他是用的PopWindow實作的,但是PopWindow有很多地方不符合他的要求,比如彈出的起始位置,彈出的動畫效果。
我們項目中也會有這種彈出浮層的需求,舉個例子,下面是仿淘寶選擇規格的彈出浮層效果,不僅僅是這一處,整個項目中也會有很多類似的彈出浮層效果,為了友善,我們就需要有一個彈出浮層基類,來簡化我們的代碼。下面我就來介紹下我們項目的解決方案。
我們的實作思路是:将彈出浮層的View 獨立封裝,然後擷取到這個View的執行個體,add 到我們需要顯示的螢幕 decodeView 上,是以我們預設那個需要使用的頁面 最外層使用的是 FramLayout (具體原因大家可以百度 FramLayout ,了解下它的屬性),在add到螢幕上後,将 浮層View隐藏,在觸發條件後再給View 配上相應的彈出動畫顯示。下面我們看下這個基類:
package com.example.jin.floating.view;
import android.animation.Animator;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import java.util.ArrayList;
import java.util.List;
/**
* 浮層基類
*
*/
public abstract class BaseFloatinglayer {
protected Context mContext;
protected int resourceId;//布局頁面id
protected ViewGroup content, resource_View;
protected FrameLayout decorView;
protected LinearLayout background;
protected Intent intentData;
protected boolean click_background_close=true;
protected boolean isInited=false;
protected FloatingCallBack mFloatingCallBack;
protected boolean isAnimating=false;//動畫正在執行
protected boolean isShowed=false;//頁面已經顯示
protected List<Animator> mAnimatorList = new ArrayList<Animator>();
public BaseFloatinglayer(Context ctx, int ResourceId){
this.mContext=ctx;
this.resourceId =ResourceId;
InitView();
}
public abstract void openShow();//打開顯示動畫
public abstract void closeHide();//關閉隐藏
public abstract void findView(ViewGroup resource_View);//頁面初始化成功傳回布局Resource_View
public abstract void hide();//初始化時隐藏
public abstract void setIntentData(Intent intentData);//視圖打開後擷取資料
public void setmFloatingCallBack(FloatingCallBack mFloatingCallBack) {
this.mFloatingCallBack = mFloatingCallBack;
}
public boolean isShowed() {
return isShowed;
}
public View getView() {
return this.resource_View;
}
protected void InitView(){
LayoutInflater inflater = LayoutInflater.from(mContext);
decorView = (FrameLayout) ((ViewGroup)((Activity)mContext).getWindow().getDecorView().findViewById(android.R.id.content));//.getChildAt(0)
content = (ViewGroup) decorView.getChildAt(0);
resource_View = (ViewGroup) inflater.inflate(resourceId, null);
InitBackground();
findView(resource_View);
isInited=true;
}
/**
* 初始化背景層
*/
protected void InitBackground(){
background=new LinearLayout(mContext);
background.setBackgroundColor(Color.BLACK);
background.setOrientation(LinearLayout.VERTICAL);
background.setVisibility(View.GONE);
background.setAlpha(0);
background.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
background.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (click_background_close) {
closeHide();
}
}
});
}
public View Background(){
return this.background;
}
/**
* 添加到頂層
*/
public void ViewAdd(){
if(decorView.findViewById(resourceId)==null){//如果目前頁面沒有則addView
decorView.addView(background);
decorView.addView(resource_View);
}
}
/**
* 添加到頂層
* @param VL
*/
public void ViewAdd(ViewGroup.LayoutParams VL){
if(decorView.findViewById(resourceId)==null){//如果目前頁面沒有則addView
decorView.addView(background);
decorView.addView(resource_View,VL);
}
}
public void ViewAddMoBackgrond(ViewGroup.LayoutParams VL){
if(decorView.findViewById(resourceId)==null){//如果目前頁面沒有則addView
decorView.addView(resource_View,VL);
}
}
/**
* 添加到頂層
* @param childid
*/
public void ViewAddToParent(int childid){
if(content.findViewById(resourceId)==null){//如果目前頁面沒有則addView
content.addView(background);
content.addView(resource_View);
}
}
/**
* 添加到指定索引
* @param childid
* @param VL
*/
public void ViewAddToParent(int childid, ViewGroup.LayoutParams VL){
if(content.findViewById(resourceId)==null){//如果目前頁面沒有則addView
content.addView(background, childid, VL);
content.addView(resource_View, childid+1,VL);
}
}
}
我們來看下主要實作代碼部分:
1、擷取到螢幕,以及傳入的 浮層View 的 布局xml 檔案id,其中resourceId就是傳入的xml 檔案id:
LayoutInflater inflater = LayoutInflater.from(mContext);
decorView = (FrameLayout) ((ViewGroup)((Activity)mContext).getWindow().getDecorView().findViewById(android.R.id.content));//.getChildAt(0)
content = (ViewGroup) decorView.getChildAt(0);
resource_View = (ViewGroup) inflater.inflate(resourceId, null);
2、将執行個體化擷取到的浮層View add 到螢幕上,這裡我們封裝了幾個add方法,分别是預設添加到頂層; 添加到置頂索引位置; 同時添加陰影浮層(這個陰影浮層是夾在螢幕和浮層View之間的);根據傳入的 LayoutParams 添加浮層,可以滿足多種需求,如果有新的需求,也可以在其中添加相應方法。
public void ViewAdd(){
if(decorView.findViewById(resourceId)==null){//如果目前頁面沒有則addView
decorView.addView(background);
decorView.addView(resource_View);
}
}
/**
* 添加到頂層
* @param childid
*/
public void ViewAddToParent(int childid){
if(content.findViewById(resourceId)==null){//如果目前頁面沒有則addView
content.addView(background);
content.addView(resource_View);
}
}
/**
* 添加到頂層
* @param VL
*/
public void ViewAdd(ViewGroup.LayoutParams VL){
if(decorView.findViewById(resourceId)==null){//如果目前頁面沒有則addView
decorView.addView(background);
decorView.addView(resource_View,VL);
}
}
3、 這裡還封裝了幾個abstract 方法,對應彈出,隐藏,擷取控件,接收傳入資料等操作,以實作需要在浮層View進行一些進一步的操作:
public abstract void openShow();//打開顯示動畫
public abstract void closeHide();//關閉隐藏
public abstract void findView(ViewGroup resource_View);//頁面初始化成功傳回布局Resource_View
public abstract void hide();//初始化時隐藏
public abstract void setIntentData(Intent intentData);//視圖打開後擷取資料
4、 同時我們還封裝了個回調接口,可以讓我們接收到開始彈出,結束彈出,開始隐藏,結束隐藏的動作:
public interface FloatingCallBack {
void OpenStart();
void OpenEnd();
void CloseStart();
void CloseEnd();
}
介紹了原理,我們來介紹下使用方法:建立類檔案,繼承基類,在 openShow 和 closeHide 方法中寫你需要的彈出,隐藏動畫(我這裡隻是舉例了從下方彈出和收起到下方,也可以替換成上下左右4個方向的,任意都可以,看你的具體需求了),并且在Hide方法中将其影藏:
@Override
public void hide() {
resource_View.setTranslationY(DensityUtils.getHeight(mContext));
resource_View.setVisibility(View.GONE);
isAnimating=false;
isShowed=false;
}
我們來看下已經寫好了的 TestFloating:
package com.example.jin.floating.view;
import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import com.example.jin.floating.DensityUtils;
import com.example.jin.floating.R;
import java.util.Collections;
/**
* Created by Jin on 2016/8/11.
* 用途 :
*/
public class TestFloating extends BaseFloatinglayer {
private RelativeLayout touch_close;
public TestFloating(Context ctx, int ResourceId) {
super(ctx, ResourceId);
}
@Override
public void openShow() {
if(!isAnimating&&!isShowed){
// touch_to_close.setBackgroundResource(R.color.transparent);
isAnimating=true;
AnimatorSet m_AnimatorSet = new AnimatorSet();
resource_View.setVisibility(View.VISIBLE);
ObjectAnimator Resource_View_TRANSLATION_Y= ObjectAnimator.ofFloat(resource_View, View.TRANSLATION_Y, DensityUtils.getHeight(mContext),0 );
mAnimatorList.clear();
Collections.addAll(mAnimatorList, Resource_View_TRANSLATION_Y);
m_AnimatorSet.playTogether(mAnimatorList);
m_AnimatorSet.setDuration(300);
m_AnimatorSet.start();
m_AnimatorSet.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
if(mFloatingCallBack!=null){
mFloatingCallBack.OpenStart();
}
}
@Override
public void onAnimationEnd(Animator animation) {
if(mFloatingCallBack!=null){
mFloatingCallBack.OpenEnd();
}
isAnimating=false;
isShowed=true;
// touch_to_close.setBackgroundResource(R.color.back_ground_transpant);
}
@Override
public void onAnimationCancel(Animator animation) {
if(mFloatingCallBack!=null){
mFloatingCallBack.OpenEnd();
}
isAnimating=false;
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
}
}
@Override
public void closeHide() {
if(!isAnimating&&isShowed) {
// touch_to_close.setBackgroundResource(R.color.transparent);
isAnimating=true;
isShowed=false;
AnimatorSet m_AnimatorSet = new AnimatorSet();
ObjectAnimator Resource_View_TRANSLATION_Y = ObjectAnimator.ofFloat(resource_View, View.TRANSLATION_Y, 0,DensityUtils.getHeight(mContext));
mAnimatorList.clear();
Collections.addAll(mAnimatorList, Resource_View_TRANSLATION_Y);
m_AnimatorSet.playTogether(mAnimatorList);
m_AnimatorSet.setDuration(300);
m_AnimatorSet.start();
m_AnimatorSet.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
if(mFloatingCallBack!=null){
mFloatingCallBack.CloseStart();
}
}
@Override
public void onAnimationEnd(Animator animation) {
resource_View.setVisibility(View.GONE);
isAnimating=false;
if(mFloatingCallBack!=null){
mFloatingCallBack.CloseEnd();
}
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
}
}
@Override
public void findView(ViewGroup resource_View) {
touch_close= (RelativeLayout) resource_View.findViewById(R.id.touch_close);
touch_close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
closeHide();
}
});
}
@Override
public void hide() {
resource_View.setTranslationY(DensityUtils.getHeight(mContext));
resource_View.setVisibility(View.GONE);
isAnimating=false;
isShowed=false;
}
@Override
public void setIntentData(Intent intentData) {
}
}
剩下的就是在我們的Activity中調用,先執行個體化:
private void initFloating() {
testFloating=new TestFloating(this,R.layout.floating_layout);
FrameLayout.LayoutParams couponsFloatingFL = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
testFloating.ViewAddMoBackgrond(couponsFloatingFL);
testFloating.hide();
}
在需要觸發的地方調用 openShow方法就可以了:
testFloating.openShow();
我們來看一下效果: