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_PARENT

popupWindow = 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() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (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() {
@Override
public 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() {
@Override
public 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

private void showPopUp(View v) {

LinearLayout layout = new LinearLayout(this);

layout.setBackgroundColor(Color.GRAY);

TextView tv = new TextView(this);

tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

tv.setText("I'm a pop -----------------------------!");

tv.setTextColor(Color.WHITE);

layout.addView(tv);

popupWindow = new PopupWindow(layout,120,120);

popupWindow.setFocusable(true);

popupWindow.setOutsideTouchable(true);

popupWindow.setBackgroundDrawable(new BitmapDrawable());

int[] location = new int[2];

v.getLocationOnScreen(location);

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

}

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

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

右边：

[html] view
plain copy

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。。。。。。