Android之PopupWindow-底部弹出,以及中间弹出有变暗效果

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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.官网原文

大概意思:这个类代表一个弹出窗口,可以用来显示任意的视图.弹出的窗口是当前活动的一个浮动容器.

在这里写出我们项目中常用的两种弹窗方式,底部弹窗以及中间弹窗,并且可以设置PopupWindow以外部分有变暗的效果.只要大家理解了一种,其它的都可以很快的写出来的.

先来张效果图:

底部弹出PopupWindow(点击PopupWindow以外部分,PopupWindow 会消失)

这里需要注意的是:当我们点击返回键或点击PopupWindow以外的地方时,需要PopupWindow消失时,下面的两个方法是很重要的.

popupWindow.setFocusable(true); //设置PopupWindow的焦点

popupWindow.setBackgroundDrawable(new ColorDrawable(0x00000000)); //为PopupWindow设置背景,这里为了不影响效果,我也设置了透明背景.具体解释看代码中,我写了很详细的注释.

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/**
* 底部弹出PopupWindow
*
* 点击PopupWindow以外部分或点击返回键时,PopupWindow 会 消失
* @param view  parent view
*/
public
void
showBottomPopupWindow(View view) {
        
//自定义PopupWindow的布局
        
View contentView = LayoutInflater.from(
this
).inflate(R.layout.popupwindow_layout,
null
);
        
//初始化PopupWindow,并为其设置布局文件
        
final
PopupWindow popupWindow =
new
PopupWindow(contentView);
        
//确定按钮点击事件
        
contentView.findViewById(R.id.tv_confirm).setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
Toast.makeText(PopupWindowTest.
this
,
"点击了确定"
, Toast.LENGTH_SHORT).show();
                
popupWindow.dismiss();
            
}
        
});
        
//取消按钮点击事件
        
contentView.findViewById(R.id.tv_cancel).setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
popupWindow.dismiss();
            
}
        
});
        
//设置PopupWindow的宽和高,必须设置,否则不显示内容(也可用PopupWindow的构造方法设置宽高)
        
popupWindow.setWidth(LinearLayout.LayoutParams.MATCH_PARENT);
        
popupWindow.setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);
        
//当需要点击返回键,或者点击空白时,需要设置下面两句代码.
        
//如果有背景，则会在contentView外面包一层PopupViewContainer之后作为mPopupView，如果没有背景，则直接用contentView作为mPopupView。
        
//而这个PopupViewContainer是一个内部私有类，它继承了FrameLayout，在其中重写了Key和Touch事件的分发处理
        
popupWindow.setFocusable(
true
);
        
popupWindow.setBackgroundDrawable(
new
ColorDrawable(
0x00000000
));  
//为PopupWindow设置透明背景.
        
popupWindow.setOutsideTouchable(
false
);
        
//设置PopupWindow进入和退出动画
        
popupWindow.setAnimationStyle(R.style.anim_popup_bottombar);
        
//设置PopupWindow显示的位置
        
popupWindow.showAtLocation(view, Gravity.BOTTOM,
0
,
0
);
    
}

底部弹出PopupWindow(点击PopupWindow以外部分,PopupWindow 不会消失 )

这里设置的是,点击PopupWindow以外部分,不让PopupWindow消失,只有点击返回键,或用户主动取消时,PopupWindow才会消失.已满足有时我们变态的需求….直接上代码.

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/**
* 底部弹出PopupWindow
*
* 点击PopupWindow以外部分或点击返回键时,PopupWindow 不会 消失
* @param view  parent view
*/
    
public
void
showBottomPopupWindow2(View view) {
        
//自定义PopupWindow的布局
        
View contentView = LayoutInflater.from(
this
).inflate(R.layout.popupwindow_layout,
null
);
        
contentView.setFocusable(
true
);
        
contentView.setFocusableInTouchMode(
true
);
        
//初始化PopupWindow对象,并为其设置宽高以及布局文件
        
final
PopupWindow popupWindow =
new
PopupWindow(contentView, LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        
popupWindow.setFocusable(
true
);
        
popupWindow.setOutsideTouchable(
false
);
 
        
contentView.setOnKeyListener(
new
View.OnKeyListener() {
            
@Override
            
public
boolean
onKey(View v,
int
keyCode, KeyEvent event) {
                
if
(keyCode == KeyEvent.KEYCODE_BACK) {
                    
popupWindow.dismiss();
 
                    
return
true
;
                
}
                
return
false
;
            
}
        
});
        
//确定按钮点击事件
        
contentView.findViewById(R.id.tv_confirm).setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
Toast.makeText(PopupWindowTest.
this
,
"点击了确定"
, Toast.LENGTH_SHORT).show();
                
popupWindow.dismiss();
            
}
        
});
        
//取消按钮点击事件
        
contentView.findViewById(R.id.tv_cancel).setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
popupWindow.dismiss();
            
}
        
});
 
        
//设置PopupWindow进入和退出动画
        
popupWindow.setAnimationStyle(R.style.anim_popup_bottombar);
        
//设置PopupWindow显示在底部
        
popupWindow.showAtLocation(view, Gravity.BOTTOM,
0
,
0
);
    
}

中间弹出PopupWindow,有一种变暗的效果

其实设置变暗效果也挺简单的,我们知道,微信上就有这种效果.下面给出代码:(需要注意的是:需要监听PopupWindow的状态,当PopupWindow消失时,恢复设置的背景颜色)

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// 设置PopupWindow以外部分的背景颜色  有一种变暗的效果
final
WindowManager.LayoutParams wlBackground = getWindow().getAttributes();
wlBackground.alpha =
0
.5f;     
// 0.0 完全不透明,1.0完全透明
getWindow().setAttributes(wlBackground);

完整代码:

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/**
* 中间弹出PopupWindow
*
*  设置PopupWindow以外部分有一中变暗的效果
* @param view  parent view
*/
public
void
showCenterPopupWindow(View view) {
        
View contentView = LayoutInflater.from(
this
).inflate(R.layout.popupwindow_layout,
null
);
        
final
PopupWindow popupWindow =
new
PopupWindow(contentView, LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        
TextView tvTitle = (TextView)contentView.findViewById(R.id.tv_title);
        
TextView tvConfirm = (TextView)contentView.findViewById(R.id.tv_confirm);
        
TextView tvCancel = (TextView)contentView.findViewById(R.id.tv_cancel);
        
tvTitle.setText(
"标为已读"
);
        
tvConfirm.setText(
"置顶公众号"
);
        
tvCancel.setText(
"取消关注"
);
 
        
tvTitle.setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
Toast.makeText(PopupWindowTest.
this
,
"标为已读"
, Toast.LENGTH_SHORT).show();
                
popupWindow.dismiss();
            
}
        
});
 
        
tvConfirm.setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
Toast.makeText(PopupWindowTest.
this
,
"置顶公众号"
, Toast.LENGTH_SHORT).show();
                
popupWindow.dismiss();
            
}
        
});
 
        
tvCancel.setOnClickListener(
new
View.OnClickListener() {
            
@Override
            
public
void
onClick(View v) {
                
Toast.makeText(PopupWindowTest.
this
,
"取消关注"
, Toast.LENGTH_SHORT).show();
                
popupWindow.dismiss();
            
}
        
});
        
popupWindow.setFocusable(
true
);
        
popupWindow.setBackgroundDrawable(
new
ColorDrawable(
0x00000000
));
        
// 设置PopupWindow以外部分的背景颜色  有一种变暗的效果
        
final
WindowManager.LayoutParams wlBackground = getWindow().getAttributes();
        
wlBackground.alpha =
0
.5f;     
// 0.0 完全不透明,1.0完全透明
        
getWindow().setAttributes(wlBackground);
        
// 当PopupWindow消失时,恢复其为原来的颜色
        
popupWindow.setOnDismissListener(
new
PopupWindow.OnDismissListener() {
            
@Override
            
public
void
onDismiss() {
                
wlBackground.alpha =
1
.0f;
                
getWindow().setAttributes(wlBackground);
            
}
        
});
        
//设置PopupWindow进入和退出动画
        
popupWindow.setAnimationStyle(R.style.anim_popup_centerbar);
        
// 设置PopupWindow显示在中间
        
popupWindow.showAtLocation(view,Gravity.CENTER,
0
,
0
);
 
    
}

下面给出源码,大家直接查看PopupWindowTest.java文件,动画源码在res/anim下
https://github.com/ListenerGao/MyTest/blob/master/app/src/main/java/com/listenergao/mytest/activity/PopupWindowTest.java