通用PopupWindow,幾行代碼搞定PopupWindow彈窗

Dominic19I 8年前發布 | 29K 次閱讀 Android開發 移動開發 PopupWindow

我們都知道,Android 中的彈窗基本有兩種,一種是AlertDialog,另一種是PopupWindow,AlertDialog的顯示位置是固定的,PopWindow 的顯示位置是我們可以設置和調整的,因此,像項目中的一些場景如:某個功能的提示說明、點擊按鈕在按鈕上方或者下方彈出菜單、新功能彈窗引導等。由于這些彈窗的位置不固定,因此都可以用PopupWindow來做。最近項目中也用到了PopupWindow彈窗功能,在寫的過程中,發現雖然API比較簡單,但是寫一個PopupWindow,還是有點繁瑣,很多重復代碼,決定簡單封裝一下,以后添加一個彈窗就不用那么麻煩了,幾行代碼就搞定了。本篇文章是對項目中使用 PopupWindow做一個筆記和總結。

一、首先先看一下效果圖

效果圖:

popWindow.gif

以上示例展示了4中PopupWindow 使用場景

二、PopupWindow 簡單介紹

首先看一下Google 官方文檔對PopupWindow的介紹:

This class represents a popup window that can be used to display an arbitrary view. The popup window is a floating container that appears on top of the current activity.

大致意思就是:popup window 是一個出現在當前Activity頂層的懸浮容器,可以用來展示任意的View。

因此只要是個View,都可以用PopupWindow 來展示。這里我就不過多介紹PopupWindow 的API,挑幾個重要并且常用的說一下:

1,構造函數,這個不用多說,多個重載函數,穿不同的參數。

public PopupWindow(int width, int height)

public PopupWindow(View contentView, int width, int height) 

public PopupWindow(View contentView, int width, int height, boolean focusable)

2,設置顯示的View:

public void setContentView(View contentView)

3,設置展示的寬、高,構造函數傳了寬高就不用重新設置

// 設置寬,其實構造函數也是調用的這個方法
public void setWidth(int width)
//設置高
public void setHeight(int height)

4,設置是否獲取焦點

public void setFocusable(boolean focusable)

5,設置點擊PopupWindow 以外區域是否可以隱藏PopupWindow

public void setOutsideTouchable(boolean touchable)

注意:這里要注意一下,有時侯我們希望觸摸PopupWindow 以外區域就隱藏PopupWindow,理論上我們只需要調用 setOutsideTouchable(ture)設置為ture就可以了,但是實際上只設置這個屬性是不行的,必須設置背景,也就是說要和setBackgroundDrawable(Drawable background)同時使用才有效,不然,點擊PopupWindow以外區域是不能隱藏掉的。

6,隱藏PopupWindow

public void dismiss()

7,設置dissmiss 回調監聽

public void setOnDismissListener(OnDismissListener onDismissListener)

8,顯示PopupWindow

//直接顯示在參照View 的左下方
public void showAsDropDown(View anchor)
// 顯示在參照View的左下方,可以通過xoff,yOff,來調節x,y方向的偏移
public void showAsDropDown(View anchor, int xoff, int off)

public void showAsDropDown(View anchor, int xoff, int yoff, int gravity)
//顯示在指定位置,相對于整個屏幕的window而言,通過gravity調解顯示在左、上、右、下、中. x,y調整兩個方向的偏移
public void showAtLocation(View parent, int gravity, int x, int y)

以上就是PopupWindow 重要的并且常用的API。

三、封裝通用PopupWindow,CustomPopWindow,使用鏈式的方式配置并顯示

由于每次寫PopupWindow都要寫很多重復代碼,因此簡單的封裝了一個CustomPopWindow.封裝了PopupWindow 的一些常用API,使用Builder模式,就像寫AlertDialog 一樣,鏈式配置。

使用方法:

1,簡便寫法:

CustomPopWindow popWindow = new CustomPopWindow.PopupWindowBuilder(this)
                .setView(R.layout.pop_layout1)//顯示的布局,還可以通過設置一個View
           //     .size(600,400) //設置顯示的大小,不設置就默認包裹內容
                .setFocusable(true)//是否獲取焦點,默認為ture
                .setOutsideTouchable(true)//是否PopupWindow 以外觸摸dissmiss
                .create()//創建PopupWindow
                .showAsDropDown(mButton1,0,10);//顯示PopupWindow

以上就是彈出一個簡單的PopupWindow,是不是看起來很優雅和簡單,還可以簡單一點:

CustomPopWindow popWindow = new CustomPopWindow.PopupWindowBuilder(this)
                .setView(R.layout.pop_layout1)//顯示的布局
                .create()//創建PopupWindow
                .showAsDropDown(mButton1,0,10);//顯示PopupWindow

如果是一個簡單的只展示文案的彈窗,就可以只設置一個View,就可以了,很簡單吧!!!

2,展示一個PopupWindow 彈窗菜單(像手機QQ,微信的頂部菜單)

View contentView = LayoutInflater.from(this).inflate(R.layout.pop_menu,null);
        //處理popWindow 顯示內容
        handleLogic(contentView);
        //創建并顯示popWindow
        mCustomPopWindow= new CustomPopWindow.PopupWindowBuilder(this)
                .setView(contentView)
                .create()
                .showAsDropDown(mButton3,0,20);

如果PopupWindow 展示的內容需要在程序代碼中設置或者響應點擊事件等,可以現獲取到這個View,然后處理一些顯示和點擊事件邏輯,再交給CustomPopWindow 創建顯示。比如響應菜單點擊事件的邏輯處理:

/**
     * 處理彈出顯示內容、點擊事件等邏輯
     * @param contentView
     */
    private void handleLogic(View contentView){
        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(mCustomPopWindow!=null){
                    mCustomPopWindow.dissmiss();
                }
                String showContent = "";
                switch (v.getId()){
                    case R.id.menu1:
                        showContent = "點擊 Item菜單1";
                        break;
                    case R.id.menu2:
                        showContent = "點擊 Item菜單2";
                        break;
                    case R.id.menu3:
                        showContent = "點擊 Item菜單3";
                        break;
                    case R.id.menu4:
                        showContent = "點擊 Item菜單4";
                        break;
                    case R.id.menu5:
                        showContent = "點擊 Item菜單5" ;
                        break;
                }
                Toast.makeText(MainActivity.this,showContent,Toast.LENGTH_SHORT).show();
            }
        };
        contentView.findViewById(R.id.menu1).setOnClickListener(listener);
        contentView.findViewById(R.id.menu2).setOnClickListener(listener);
        contentView.findViewById(R.id.menu3).setOnClickListener(listener);
        contentView.findViewById(R.id.menu4).setOnClickListener(listener);
        contentView.findViewById(R.id.menu5).setOnClickListener(listener);
    }
}

3,展示一個ListView,其實跟上面是一樣的,這里貼一下實例代碼:

private void showPopListView(){
        View contentView = LayoutInflater.from(this).inflate(R.layout.pop_list,null);
        //處理popWindow 顯示內容
        handleListView(contentView);
        //創建并顯示popWindow
        mListPopWindow= new CustomPopWindow.PopupWindowBuilder(this)
                .setView(contentView)
                .size(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT)//顯示大小
                .create()
                .showAsDropDown(mButton4,0,20);
    }

    private void handleListView(View contentView){
        RecyclerView recyclerView = (RecyclerView) contentView.findViewById(R.id.recyclerView);
        LinearLayoutManager manager = new LinearLayoutManager(this);
        manager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(manager);
        MyAdapter adapter = new MyAdapter();
        adapter.setData(mockData());
        recyclerView.setAdapter(adapter);
        adapter.notifyDataSetChanged();

    }

以上就是對于 PopupWindow的封裝和使用示例。封裝了PopupWindow 常用的API,沒有展示完全,還有像添加顯示和隱藏動畫setAnimationStyle(int animationStyle),隱藏回調監聽等等。需要的朋友自己試試。

最后,貼出CustomPopWindow的源碼:

/**
 *
 * 自定義PopWindow類,封裝了PopWindow的一些常用屬性,用Builder模式支持鏈式調用
 * Created by zhouwei on 16/11/28.
 */

public class CustomPopWindow {
    private Context mContext;
    private int mWidth;
    private int mHeight;
    private boolean mIsFocusable = true;
    private boolean mIsOutside = true;
    private int mResLayoutId = -1;
    private View mContentView;
    private PopupWindow mPopupWindow;
    private int mAnimationStyle = -1;

    private boolean mClippEnable = true;//default is true
    private boolean mIgnoreCheekPress = false;
    private int mInputMode = -1;
    private PopupWindow.OnDismissListener mOnDismissListener;
    private int mSoftInputMode = -1;
    private boolean mTouchable = true;//default is ture
    private View.OnTouchListener mOnTouchListener;
    private CustomPopWindow(Context context){
        mContext = context;
    }

    public int getWidth() {
        return mWidth;
    }

    public int getHeight() {
        return mHeight;
    }

    /**
     *
     * @param anchor
     * @param xOff
     * @param yOff
     * @return
     */
    public CustomPopWindow showAsDropDown(View anchor, int xOff, int yOff){
        if(mPopupWindow!=null){
            mPopupWindow.showAsDropDown(anchor,xOff,yOff);
        }
        return this;
    }

    public CustomPopWindow showAsDropDown(View anchor){
        if(mPopupWindow!=null){
            mPopupWindow.showAsDropDown(anchor);
        }
        return this;
    }

    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    public CustomPopWindow showAsDropDown(View anchor, int xOff, int yOff, int gravity){
        if(mPopupWindow!=null){
            mPopupWindow.showAsDropDown(anchor,xOff,yOff,gravity);
        }
        return this;
    }


    /**
     * 相對于父控件的位置(通過設置Gravity.CENTER,下方Gravity.BOTTOM等 ),可以設置具體位置坐標
     * @param parent 
     * @param gravity
     * @param x the popup's x location offset
     * @param y the popup's y location offset
     * @return
     */
    public CustomPopWindow showAtLocation(View parent, int gravity, int x, int y){
        if(mPopupWindow!=null){
            mPopupWindow.showAtLocation(parent,gravity,x,y);
        }
        return this;
    }

    /**
     * 添加一些屬性設置
     * @param popupWindow
     */
    private void apply(PopupWindow popupWindow){
        popupWindow.setClippingEnabled(mClippEnable);
        if(mIgnoreCheekPress){
            popupWindow.setIgnoreCheekPress();
        }
        if(mInputMode!=-1){
            popupWindow.setInputMethodMode(mInputMode);
        }
        if(mSoftInputMode!=-1){
            popupWindow.setSoftInputMode(mSoftInputMode);
        }
        if(mOnDismissListener!=null){
            popupWindow.setOnDismissListener(mOnDismissListener);
        }
        if(mOnTouchListener!=null){
            popupWindow.setTouchInterceptor(mOnTouchListener);
        }
        popupWindow.setTouchable(mTouchable);



    }

    private PopupWindow build(){

        if(mContentView == null){
            mContentView = LayoutInflater.from(mContext).inflate(mResLayoutId,null);
        }

        if(mWidth != 0 && mHeight!=0 ){
            mPopupWindow = new PopupWindow(mContentView,mWidth,mHeight);
        }else{
            mPopupWindow = new PopupWindow(mContentView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        }
        if(mAnimationStyle!=-1){
            mPopupWindow.setAnimationStyle(mAnimationStyle);
        }

        apply(mPopupWindow);//設置一些屬性

        mPopupWindow.setFocusable(mIsFocusable);
        mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        mPopupWindow.setOutsideTouchable(mIsOutside);

        if(mWidth == 0 || mHeight == 0){
            mPopupWindow.getContentView().measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
            //如果外面沒有設置寬高的情況下,計算寬高并賦值
            mWidth = mPopupWindow.getContentView().getMeasuredWidth();
            mHeight = mPopupWindow.getContentView().getMeasuredHeight();
        }

        mPopupWindow.update();

        return mPopupWindow;
    }

    /**
     * 關閉popWindow
     */
    public void dissmiss(){
        if(mPopupWindow!=null){
            mPopupWindow.dismiss();
        }
    }


    public static class PopupWindowBuilder{
        private CustomPopWindow mCustomPopWindow;

        public PopupWindowBuilder(Context context){
            mCustomPopWindow = new CustomPopWindow(context);
        }
        public PopupWindowBuilder size(int width,int height){
            mCustomPopWindow.mWidth = width;
            mCustomPopWindow.mHeight = height;
            return this;
        }


        public PopupWindowBuilder setFocusable(boolean focusable){
            mCustomPopWindow.mIsFocusable = focusable;
            return this;
        }



        public PopupWindowBuilder setView(int resLayoutId){
            mCustomPopWindow.mResLayoutId = resLayoutId;
            mCustomPopWindow.mContentView = null;
            return this;
        }

        public PopupWindowBuilder setView(View view){
            mCustomPopWindow.mContentView = view;
            mCustomPopWindow.mResLayoutId = -1;
            return this;
        }

        public PopupWindowBuilder setOutsideTouchable(boolean outsideTouchable){
            mCustomPopWindow.mIsOutside = outsideTouchable;
            return this;
        }

        /**
         * 設置彈窗動畫
         * @param animationStyle
         * @return
         */
        public PopupWindowBuilder setAnimationStyle(int animationStyle){
            mCustomPopWindow.mAnimationStyle = animationStyle;
            return this;
        }


        public PopupWindowBuilder setClippingEnable(boolean enable){
            mCustomPopWindow.mClippEnable =enable;
            return this;
        }


        public PopupWindowBuilder setIgnoreCheekPress(boolean ignoreCheekPress){
            mCustomPopWindow.mIgnoreCheekPress = ignoreCheekPress;
            return this;
        }

        public PopupWindowBuilder setInputMethodMode(int mode){
            mCustomPopWindow.mInputMode = mode;
            return this;
        }

        public PopupWindowBuilder setOnDissmissListener(PopupWindow.OnDismissListener onDissmissListener){
            mCustomPopWindow.mOnDismissListener = onDissmissListener;
            return this;
        }


        public PopupWindowBuilder setSoftInputMode(int softInputMode){
            mCustomPopWindow.mSoftInputMode = softInputMode;
            return this;
        }


        public PopupWindowBuilder setTouchable(boolean touchable){
            mCustomPopWindow.mTouchable = touchable;
            return this;
        }

        public PopupWindowBuilder setTouchIntercepter(View.OnTouchListener touchIntercepter){
            mCustomPopWindow.mOnTouchListener = touchIntercepter;
            return this;
        }


        public CustomPopWindow create(){
            //構建PopWindow
            mCustomPopWindow.build();
            return mCustomPopWindow;
        }

    }

}

好了,本篇文章到此結束,以上就是PopupWindow的一些介紹和一個簡單的封裝。

 

來自:http://www.jianshu.com/p/9304d553aa67

 

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