PopupWindow的使用和分析 弹出框的一种

PopupWindow使用

       PopupWindow这个类用来实现一个弹出框，可以使用任意布局的View作为其内容，这个弹出框是悬浮在当前activity之上的。

自己的例子：

/** * 创建PopupWindow */private PopupWindow popupWindow;private LinearLayout popupWindow_view;protected void initPopuptWindow() {// TODO Auto-generated method stub// 获取自定义布局文件activity_popupwindow_left.xml的视图//popupWindow_view = (LinearLayout) getLayoutInflater().inflate(R.layout.welcome, null,false);popupWindow_view = new LinearLayout(context);popupWindow_view.setBackgroundResource(R.color.blackbantouming);//popupWindow_view.setBackgroundColor(R.color.red);// 创建PopupWindow实例,200,LayoutParams.MATCH_PARENT分别是宽度和高度LayoutParams.MATCH_PARENTpopupWindow = new PopupWindow(popupWindow_view,LayoutParams.FILL_PARENT , LayoutParams.FILL_PARENT, true);// 这里是位置显示方式,在屏幕的左侧popupWindow.setFocusable(true);popupWindow.setOutsideTouchable(true);// 设置动画效果//popupWindow.setAnimationStyle(R.style.AnimationFade);// 点击其他地方消失popupWindow_view.setOnTouchListener(new OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubif (popupWindow != null && popupWindow.isShowing()) {popupWindow.dismiss();popupWindow = null;}return false;}});}

/*** * 获取PopupWindow实例 */private void getPopupWindow() {if (null != popupWindow) {popupWindow.dismiss();return;} else {initPopuptWindow();}}

使用时：

/** * boolean sor  是否是排序（排序要放到下方） * LinearLayout sumLayout 存放的控件final List<Datas> list数据源boolean box下方需要不boolean with   是否跟随子控件的宽度并居中final FeelForeverService feel * */public void OneLayoutList(boolean sor,View v , final List<Datas> list, boolean box,boolean with, final FeelForeverService feel){getPopupWindow(); //这是指定在哪个控件之下  if(sor){int[] location = new int[2];  v.getLocationOnScreen(location);  popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0], location[1]-popupWindow.getHeight());  }else {popupWindow.showAsDropDown(v);}popupWindow_view.removeAllViews();LinearLayout layoutTitle=new LinearLayout(context);layoutTitle.setOrientation(LinearLayout.HORIZONTAL);LayoutInflater inflaterTitle = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflaterTitle.inflate(R.layout.service_onelist, layoutTitle);ListView list1 = (ListView) layoutTitle.findViewById(R.id.service_list_one);LinearLayout service_box_001= (LinearLayout) layoutTitle.findViewById(R.id.service_box_001);if(box) service_box_001.setVisibility(View.VISIBLE); else service_box_001.setVisibility(View.GONE);Button box_but_OK = (Button) layoutTitle.findViewById(R.id.box_but_OK_02);final EditText box_min = (EditText) layoutTitle.findViewById(R.id.box_min_02);final EditText box_max = (EditText) layoutTitle.findViewById(R.id.box_max_02);box_but_OK.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {feel.getOncliekOne("",box_min.getText().toString().trim() +"-"+ box_max.getText().toString().trim(),(box_min.getText().toString().trim().equals("")?"0":box_min.getText().toString().trim()) +"-"+ (box_max.getText().toString().trim().equals("")?"9999999":box_max.getText().toString().trim()));popupWindow.dismiss();}});RelativeLayout onelistBox =(RelativeLayout) layoutTitle.findViewById(R.id.onelistBox); ViewGroup.LayoutParams params = onelistBox.getLayoutParams();params.height = SinyiApplication.WindowsHeight/2;onelistBox.setLayoutParams(params);list1.setAdapter(new ServiceAdapter(list));list1.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {popupWindow.dismiss();feel.getOncliekOne("" , list.get(arg2).getName(),list.get(arg2).getNote());}});//这里处理popupWindow_view.addView(layoutTitle);//如果是排序，就把list置底if(sor){popupWindow_view.setGravity(Gravity.BOTTOM);}else{popupWindow_view.setGravity(Gravity.TOP);}if(with){setImageWanH(layoutTitle, v.getWidth());popupWindow_view.setGravity(Gravity.CENTER_HORIZONTAL);}}

一些查找的资料：

介绍了popupWindow 在控件的各个方向上的显示（上、下、左、右），主要用到popupWindow 的showAtLocation(）方法：

在控件的上方：

[java] view plain copy

1. private void showPopUp(View v) {  
2.         LinearLayout layout = new LinearLayout(this);  
3.         layout.setBackgroundColor(Color.GRAY);  
4.         TextView tv = new TextView(this);  
5.         tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));  
6.         tv.setText("I'm a pop -----------------------------!");  
7.         tv.setTextColor(Color.WHITE);  
8.         layout.addView(tv);  
9.   
10.         popupWindow = new PopupWindow(layout,120,120);  
11.           
12.         popupWindow.setFocusable(true);  
13.         popupWindow.setOutsideTouchable(true);  
14.         popupWindow.setBackgroundDrawable(new BitmapDrawable());  
15.           
16.         int[] location = new int[2];  
17.         v.getLocationOnScreen(location);  
18.           
19.         popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0], location[1]-popupWindow.getHeight());  
20.     }  

在控件的其他方向上显示只需修改最后一行代码即可，如：

下方：popupWindow.showAsDropDown(v);

左边：

[java] view plain copy

1. popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]-popupWindow.getWidth(), location[1]);  

右边：

[html] view plain copy

1. popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]+v.getWidth(), location[1]);  

PopupWindow显示的方法有三个,showAsDropDown(anchor),showAsDropDown(anchor, xoff, yoff)和showAtLocation(parent, gravity, x, y)。
前两个showAsDropDown方法是让PopupWindow相对于某个控件显示，而showAtLocation是相对于整个窗口的。
第一个参数是View类型的parent,虽然这里参数名是parent，其实，不是把PopupWindow放到这个parent里，并不要求这个parent是一个ViewGroup，这个参数名让人误解。官方文档”a parent view to get the android.view.View.getWindowToken() token from
“,这个parent的作用应该是调用其getWindowToken()方法获取窗口的Token,所以，只要是该窗口上的控件就可以了。
第二个参数是Gravity，可以使用|附加多个属性，如Gravity.LEFT|Gravity.BOTTOM。
第三四个参数是x,y偏移。

待补充。。。。。。