自定義通過PopupWindow實現通用選單

會經常使用者到選單選項提供給使用者選擇，例如選擇圖片，相簿和相機選擇等一系列場景吧，根據為了以後更加方便使用通過自定義封裝了一個選單，主要是通過一個列表展示，將選單項列表傳入設定引數就可以顯示，使用方便簡單隻需要幾行程式碼就可以,可以顯示在底部，居中和某個控制元件的下方。先看效果圖吧

居中顯示

底部顯示

置於控制元件下方

看過效果圖接下來看一下用法

List<MenuModel> menus =new ArrayList<>();

PopMenu popMenu=new PopMenu.MenuBuilder(activity,menus, new BaseQuickAdapter.OnItemClickListener() {

@Override

public void onItemClick(BaseQuickAdapter adapter, View view, int position) {

})//必須設定當前activity，menus 選單項，選單點選事件

.focusable(true)//是否獲取焦點

.outsideTouchable(true)//點選外部是否小時

.showIco(false)//是否顯示選單圖示

.setElevation(true)//背景是否置灰

.hasDiver(false)//是否顯示分割線

.setItemBackground(R.drawable.pop_menu_item_selector)//選單子項背景

.show(rightImg,0,60);//置於控制元件下方

只需要設定需要的屬性就可以顯示並使用了，另外show()預設居中顯示 showBottom()在底部顯示

用法是不是很簡單呢，接下來就要看原始碼了

package shens.library.base.view.menu;

import android.app.Activity;

import android.graphics.drawable.BitmapDrawable;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.WindowManager;

import android.widget.PopupWindow;

import java.util.List;

import shens.library.base.R;

import shens.library.base.adapter.recyle.BaseQuickAdapter;

import shens.library.base.utils.ScreenUtils;

/**

* 彈出選單

* Created by shenshilei on 2018/1/4.

* email ssl_java@163.com

* site http://www.houziyou.com

*/

public class PopMenu {

private ActivitymContext;//上下文

private ViewmPopWindowView;

private RecyclerViewmenuListView;

private PopupWindowpopupWindow;

private PopupWindow.OnDismissListenerdimisListener;

private BaseQuickAdapter.OnItemClickListeneronItemClickListener;

private MenuListAdaptermenuListAdapter;

private ListmenuModels;

private boolean isShowIco =false;

private int mWidth;

private boolean isSetElevation=true;//背景是否陰影

public PopMenu(Activity mContext, List menus){

this.mContext = mContext;

popupWindow =new PopupWindow(mContext);

this.menuModels = menus;

initView();

}

private void initView() {

mWidth= ScreenUtils.getScreemWidth(mContext)/2;

mPopWindowView = LayoutInflater.from(mContext).inflate(R.layout.pop_menu_view,null);

menuListView = (RecyclerView)mPopWindowView.findViewById(R.id.pop_menu_listview);

menuListView.setLayoutManager(new LinearLayoutManager(mContext));

menuListAdapter=new MenuListAdapter(isShowIco,LinearLayoutManager.VERTICAL ,R.layout.pop_menu_item,menuModels);

menuListAdapter.setOnItemClickListener(onItemClickListener);

popupWindow.setBackgroundDrawable(new BitmapDrawable());

popupWindow.setFocusable(true);

popupWindow.setOutsideTouchable(true);

popupWindow.setWidth(mWidth);

popupWindow.setContentView(mPopWindowView);

popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {

@Override

public void onDismiss() {

setViewNoElevation();

if(dimisListener!=null){

dimisListener.onDismiss();

}

});

}

public void setOnItemClickListener(BaseQuickAdapter.OnItemClickListener onItemClickListener){

this.onItemClickListener = onItemClickListener;

menuListAdapter.setOnItemClickListener(this.onItemClickListener);

}

public void setWidth(int width){

this.mWidth = width;

}

public void setHasDiver(boolean isHasDivier){

menuListAdapter.setIsDiver(isHasDivier);

}

public void setMenuItemBackground(int resid){

menuListAdapter.setItemBackground(resid);

}

public void showCenter(){

setViewElevation();

menuListView.setAdapter(menuListAdapter);

popupWindow.setAnimationStyle(R.style.popupwindow_alph);

popupWindow.showAtLocation(mContext.getWindow().getDecorView(), Gravity.CENTER,0,0);

}

public void show(){

showCenter();

}

public void showBottom(){

setViewElevation();

menuListView.setAdapter(menuListAdapter);

popupWindow.setAnimationStyle(R.style.popupwindow_botoom);

popupWindow.showAtLocation(mContext.getWindow().getDecorView(), Gravity.BOTTOM,0,0);

}

public void setIsshowIco(boolean isshowIco){

this.isShowIco=isshowIco;

}

public void setElevation(boolean isSetElevation){

this.isSetElevation=isSetElevation;

}

private void setFocusable(boolean focusable){

popupWindow.setFocusable(focusable);

}

private void setOutSideable(boolean outSideable){

popupWindow.setOutsideTouchable(outSideable);

}

private void setViewElevation(){

//產生背景變暗效果

if(isSetElevation){

WindowManager.LayoutParams lp =mContext.getWindow().getAttributes();

lp.alpha =0.6f;

mContext.getWindow().setAttributes(lp);

}

private void setViewNoElevation(){

if(isSetElevation){

WindowManager.LayoutParams lp =mContext.getWindow().getAttributes();

lp.alpha =1.0f;

mContext.getWindow().setAttributes(lp);

}

public void show(View view){

setViewElevation();

menuListView.setAdapter(menuListAdapter);

popupWindow.showAsDropDown(view);

}

public void show(View view,int x,int y){

setViewElevation();

menuListView.setAdapter(menuListAdapter);

popupWindow.showAsDropDown(view,x,y);

}

public void dismis(){

if(popupWindow!=null)

popupWindow.dismiss();

}

public MenuListAdaptergetAdapter(){

return menuListAdapter;

}

public void setOndismisListener(PopupWindow.OnDismissListener dimisListener){

this.dimisListener =dimisListener;

}

public static class MenuBuilder{

private Activityactivity;

Listmenus;

private PopupWindow.OnDismissListenerdimisListener;

private BaseQuickAdapter.OnItemClickListeneronItemClickListener;

private boolean isShowIco =false;//是否顯示圖示

private boolean isHasDiver=false;//是否顯示分割線

private int itemBackResId;

private int mWidth;

private boolean isSetElevation=true;

private boolean isFocused =true;

private boolean isOutSideTouchable =true;

public MenuBuilder(Activity activity,List menus,BaseQuickAdapter.OnItemClickListener onItemClickListener){

this.activity =activity;

this.menus = menus;

this.onItemClickListener = onItemClickListener;

mWidth= ScreenUtils.getScreemWidth(activity)/2;//預設寬度為螢幕的一半

itemBackResId=R.drawable.pop_menu_item_selector;

}

public MenuBuilderdimisListener(PopupWindow.OnDismissListener dimisListener){

this.dimisListener = dimisListener;

return this;

}

public MenuBuildersetItemBackground(int resid){

this.itemBackResId = resid;

return this;

}

public MenuBuildershowIco(boolean isShowIco){

this.isShowIco = isShowIco;

return this;

}

public MenuBuilderhasDiver(boolean isHasDiver){

this.isHasDiver = isHasDiver;

return this;

}

public MenuBuilderfocusable(boolean isFocused){

this.isFocused = isFocused;

return this;

}

public MenuBuilderoutsideTouchable(boolean isOutSideTouchable){

this.isOutSideTouchable = isOutSideTouchable;

return this;

}

public MenuBuildersetElevation(boolean isSetElevation){

this.isSetElevation = isSetElevation;

return this;

}

public MenuBuilderwidth(int mWidth){

this.mWidth = mWidth;

return this;

}

public PopMenucreate(){

PopMenu popMenu =new PopMenu(activity,menus);

popMenu.setWidth(mWidth);

popMenu.setHasDiver(true);

popMenu.setIsshowIco(isShowIco);

popMenu.setElevation(isSetElevation);

popMenu.setFocusable(isFocused);

popMenu.setHasDiver(isHasDiver);

popMenu.setOutSideable(isOutSideTouchable);

popMenu.setMenuItemBackground(itemBackResId);

popMenu.setOndismisListener(dimisListener);

popMenu.setOnItemClickListener(onItemClickListener);

return popMenu;

}

public PopMenushow(){

PopMenu popMenu = create();

popMenu.show();

return popMenu;

}

public PopMenushowBottom(){

PopMenu popMenu = create();

popMenu.showBottom();

return popMenu;

}

public PopMenushow(View view,int x,int y){

PopMenu popMenu = create();

popMenu.show(view,x,y);

return popMenu;

}

以上就是選單的核心程式碼了，需要詳細或者是有疑問可以評論留言溝通

自定義通過PopupWindow實現通用選單

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