相信大家都体验过android通讯录中的弹窗效果。如图所示:
android中提供了QuickContactBadge来实现这一效果。这里简单演示下。
首先创建布局文件:
<?
xml version="1.0" encoding="utf-8"
?>
<
LinearLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
android:orientation
="vertical"
android:layout_width
="fill_parent"
android:layout_height
="fill_parent"
>
<
QuickContactBadge
android:id
="@+id/badge"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:src
="@drawable/icon"
>
</
QuickContactBadge
>
</
LinearLayout
>
很简单,在布局中添加一个QuickContactBadge组件即可。
在Activity中配置:
public
class
QuickcontactActivity
extends
Activity {
/**
Called when the activity is first created.
*/
@Override
public
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.main);
QuickContactBadge smallBadge
=
(QuickContactBadge) findViewById(R.id.badge);
//
从email关联一个contact
smallBadge.assignContactFromEmail(
"
[email protected]
"
,
true
);
//
设置窗口模式
smallBadge.setMode(ContactsContract.QuickContact.MODE_SMALL);
}
}
注意加入读通讯录的权限
<uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission>
实现效果如图:
但是这个组件局限性很大,弹出窗口中只能是一些contact操作。但是仔细一想,这样的操作并不难,不就是一个带动画的弹窗么。下面就来我们自己实现一个。
实现一个带动画的弹窗并不难,在我的之前一篇博客中有讲过弹窗PopupWindow的使用,不清楚弹窗的朋友可以去看下。在这里实现的难点主要有这些:
1.判断基准view在屏幕中的位置,从而确定弹窗弹出的位置以及动画。这是非常重要的一点,或许基准在屏幕上方,那么就要向下弹出。
2.动态的添加弹窗中的按钮,并实现点击
3.箭头位置的控制。箭头应该保持在基准的下方。
4.动画的匹配。里面有两种动画。一种是PopupWindow弹出动画,我们通过设置弹窗的style来实现(style的用法可以参考我之前的博客)。另一种是弹窗中间的布局的动画。
了解了难点以后,写起来就方便了。
首先实现弹窗的布局:
<?
xml version
=
"
1.0
"
encoding
=
"
utf-8
"
?>
<
RelativeLayout xmlns:android
=
"
http://schemas.android.com/apk/res/android
"
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
>
<
FrameLayout
android:layout_marginTop
=
"
10dip
"
android:id
=
"
@+id/header2
"
android:layout_width
=
"
fill_parent
"
android:layout_height
=
"
wrap_content
"
android:background
=
"
@drawable/quickcontact_top_frame
"
/>
<
ImageView
android:id
=
"
@+id/arrow_up
"
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
android:src
=
"
@drawable/quickcontact_arrow_up
"
/>
<
HorizontalScrollView
android:id
=
"
@+id/scroll
"
android:layout_width
=
"
fill_parent
"
android:layout_height
=
"
wrap_content
"
android:fadingEdgeLength
=
"
0dip
"
android:layout_below
=
"
@id/header2
"
android:background
=
"
@drawable/quickcontact_slider_background
"
android:scrollbars
=
"
none
"
>
<
LinearLayout
android:id
=
"
@+id/tracks
"
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
android:paddingTop
=
"
4dip
"
android:paddingBottom
=
"
4dip
"
android:orientation
=
"
horizontal
"
>
<
ImageView
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
android:src
=
"
@drawable/quickcontact_slider_grip_left
"
/>
<
ImageView
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
android:src
=
"
@drawable/quickcontact_slider_grip_right
"
/>
</
LinearLayout
>
</
HorizontalScrollView
>
<
FrameLayout
android:id
=
"
@+id/footer
"
android:layout_width
=
"
fill_parent
"
android:layout_height
=
"
wrap_content
"
android:layout_below
=
"
@id/scroll
"
android:background
=
"
@drawable/quickcontact_bottom_frame
"
/>
<
ImageView
android:id
=
"
@+id/arrow_down
"
android:layout_width
=
"
wrap_content
"
android:layout_height
=
"
wrap_content
"
android:layout_marginTop
=
"
-1dip
"
android:layout_below
=
"
@id/footer
"
android:src
=
"
@drawable/quickcontact_arrow_down
"
/>
</
RelativeLayout
>
窗体内部使用一个HorizontalScrollView可以实现一个滑动效果。我们可以动态的在这个布局中添加按钮,我们称作Actionitem。
写一个ActionItem类,使得我们可以用一个ArrayList做容器,动态的添加这些actionitem。这些都是服务于第二个难点。
package
com.notice.quickaction;
import
android.graphics.drawable.Drawable;
import
android.view.View.OnClickListener;
/**
* Action item, 每个item里面都有一个ImageView和一个TextView
*/
public
class
ActionItem {
private
Drawable icon;
private
String title;
private
OnClickListener listener;
/**
* 构造器
*/
public
ActionItem() {
}
/**
* 带Drawable参数的构造器
*/
public
ActionItem(Drawable icon) {
this
.icon
=
icon;
}
/**
* 设置标题
*/
public
void
setTitle(String title) {
this
.title
=
title;
}
/**
* 获得标题
*
*
@return
action title
*/
public
String getTitle() {
return
this
.title;
}
/**
* 设置图标
*/
public
void
setIcon(Drawable icon) {
this
.icon
=
icon;
}
/**
* 获得图标
*/
public
Drawable getIcon() {
return
this
.icon;
}
/**
* 绑定监听器
*/
public
void
setOnClickListener(OnClickListener listener) {
this
.listener
=
listener;
}
/**
* 获得监听器
*/
public
OnClickListener getListener() {
return
this
.listener;
}
}
接下来就是这个弹窗的实现了,我们继承PopupWindow类。在这个类中我们需要实现通过位置设置动画及弹出位置,并且给出一个方法供实现类调用,来动态添加item和设置动画效果。
代码如下:
package
com.notice.quickaction;
import
java.util.ArrayList;
import
android.content.Context;
import
android.graphics.Rect;
import
android.graphics.drawable.BitmapDrawable;
import
android.graphics.drawable.Drawable;
import
android.view.Gravity;
import
android.view.LayoutInflater;
import
android.view.MotionEvent;
import
android.view.View;
import
android.view.View.OnClickListener;
import
android.view.View.OnTouchListener;
import
android.view.ViewGroup;
import
android.view.ViewGroup.LayoutParams;
import
android.view.WindowManager;
import
android.view.animation.Animation;
import
android.view.animation.AnimationUtils;
import
android.view.animation.Interpolator;
import
android.widget.ImageView;
import
android.widget.LinearLayout;
import
android.widget.PopupWindow;
import
android.widget.TextView;
/**
* 继承弹窗,构造我们需要的弹窗
*/
public
class
QuickActions
extends
PopupWindow {
private
final
View root;
private
final
ImageView mArrowUp;
private
final
ImageView mArrowDown;
private
final
Animation mTrackAnim;
private
final
LayoutInflater inflater;
private
final
Context context;
protected
final
View anchor;
protected
final
PopupWindow window;
private
Drawable background
=
null
;
protected
final
WindowManager windowManager;
protected
static
final
int
ANIM_GROW_FROM_LEFT
=
1
;
protected
static
final
int
ANIM_GROW_FROM_RIGHT
=
2
;
protected
static
final
int
ANIM_GROW_FROM_CENTER
=
3
;
protected
static
final
int
ANIM_AUTO
=
4
;
private
int
animStyle;
private
boolean
animateTrack;
private
ViewGroup mTrack;
private
ArrayList
<
ActionItem
>
actionList;
/**
* 构造器,在这里初始化一些内容
*
*
@param
anchor 像我之前博客所说的理解成一个基准 弹窗以此为基准弹出
*/
public
QuickActions(View anchor) {
super
(anchor);
this
.anchor
=
anchor;
this
.window
=
new
PopupWindow(anchor.getContext());
//
在popwindow外点击即关闭该window
window.setTouchInterceptor(
new
OnTouchListener() {
@Override
public
boolean
onTouch(View v, MotionEvent event) {
if
(event.getAction()
==
MotionEvent.ACTION_OUTSIDE) {
QuickActions.
this
.window.dismiss();
return
true
;
}
return
false
;
}
});
//
得到一个windowManager对象,用来得到窗口的一些属性
windowManager
=
(WindowManager) anchor.getContext().getSystemService(Context.WINDOW_SERVICE);
actionList
=
new
ArrayList
<
ActionItem
>
();
context
=
anchor.getContext();
inflater
=
(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//
装载布局,root即为弹出窗口的布局
root
=
(ViewGroup) inflater.inflate(R.layout.quickaction,
null
);
//
得到上下两个箭头
mArrowDown
=
(ImageView) root.findViewById(R.id.arrow_down);
mArrowUp
=
(ImageView) root.findViewById(R.id.arrow_up);
setContentView(root);
mTrackAnim
=
AnimationUtils.loadAnimation(anchor.getContext(), R.anim.rail);
//
设置动画的加速效果
mTrackAnim.setInterpolator(
new
Interpolator() {
public
float
getInterpolation(
float
t) {
final
float
inner
=
(t
*
1.55f
)
-
1.1f
;
return
1.2f
-
inner
*
inner;
}
});
//
这个是弹出窗口内的水平布局
mTrack
=
(ViewGroup) root.findViewById(R.id.tracks);
animStyle
=
ANIM_AUTO;
//
设置动画风格
animateTrack
=
true
;
}
/**
* 设置一个flag来标识动画显示
*/
public
void
animateTrack(
boolean
animateTrack) {
this
.animateTrack
=
animateTrack;
}
/**
* 设置动画风格
*/
public
void
setAnimStyle(
int
animStyle) {
this
.animStyle
=
animStyle;
}
/**
* 增加一个action
*/
public
void
addActionItem(ActionItem action) {
actionList.add(action);
}
/**
* 弹出弹窗
*/
public
void
show() {
//
预处理,设置window
preShow();
int
[] location
=
new
int
[
2
];
//
得到anchor的位置
anchor.getLocationOnScreen(location);
//
以anchor的位置构造一个矩形
Rect anchorRect
=
new
Rect(location[
0
], location[
1
], location[
0
]
+
anchor.getWidth(), location[
1
]
+
anchor.getHeight());
root.setLayoutParams(
new
LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
root.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
int
rootWidth
=
root.getMeasuredWidth();
int
rootHeight
=
root.getMeasuredHeight();
//
得到屏幕的宽
int
screenWidth
=
windowManager.getDefaultDisplay().getWidth();
//
设置弹窗弹出的位置的x/y
int
xPos
=
(screenWidth
-
rootWidth)
/
2
;
int
yPos
=
anchorRect.top
-
rootHeight;
boolean
onTop
=
true
;
//
在底部弹出
if
(rootHeight
>
anchorRect.top) {
yPos
=
anchorRect.bottom;
onTop
=
false
;
}
//
根据弹出位置,设置不同方向箭头图片
showArrow(((onTop)
?
R.id.arrow_down : R.id.arrow_up), anchorRect.centerX());
//
设置弹出动画风格
setAnimationStyle(screenWidth, anchorRect.centerX(), onTop);
//
创建action list
createActionList();
//
在指定位置弹出弹窗
window.showAtLocation(
this
.anchor, Gravity.NO_GRAVITY, xPos, yPos);
//
设置弹窗内部的水平布局的动画
if
(animateTrack) mTrack.startAnimation(mTrackAnim);
}
/**
* 预处理窗口
*/
protected
void
preShow() {
if
(root
==
null
) {
throw
new
IllegalStateException(
"
需要为弹窗设置布局
"
);
}
//
背景是唯一能确定popupwindow宽高的元素,这里使用root的背景,但是需要给popupwindow设置一个空的BitmapDrawable
if
(background
==
null
) {
window.setBackgroundDrawable(
new
BitmapDrawable());
}
else
{
window.setBackgroundDrawable(background);
}
window.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
window.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
window.setTouchable(
true
);
window.setFocusable(
true
);
window.setOutsideTouchable(
true
);
//
指定布局
window.setContentView(root);
}
/**
* 设置动画风格
*
*
@param
screenWidth 屏幕宽底
*
@param
requestedX 距离屏幕左边的距离
*
@param
onTop 一个flag用来标识窗口的显示位置,如果为true则显示在anchor的顶部
*/
private
void
setAnimationStyle(
int
screenWidth,
int
requestedX,
boolean
onTop) {
//
取得屏幕左边到箭头中心的位置
int
arrowPos
=
requestedX
-
mArrowUp.getMeasuredWidth()
/
2
;
//
根据animStyle设置相应动画风格
switch
(animStyle) {
case
ANIM_GROW_FROM_LEFT:
window.setAnimationStyle((onTop)
?
R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
break
;
case
ANIM_GROW_FROM_RIGHT:
window.setAnimationStyle((onTop)
?
R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right);
break
;
case
ANIM_GROW_FROM_CENTER:
window.setAnimationStyle((onTop)
?
R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
break
;
case
ANIM_AUTO:
if
(arrowPos
<=
screenWidth
/
4
) {
window.setAnimationStyle((onTop)
?
R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
}
else
if
(arrowPos
>
screenWidth
/
4
&&
arrowPos
<
3
*
(screenWidth
/
4
)) {
window.setAnimationStyle((onTop)
?
R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
}
else
{
window.setAnimationStyle((onTop)
?
R.style.Animations_PopDownMenu_Right : R.style.Animations_PopDownMenu_Right);
}
break
;
}
}
/**
* 创建action list
*/
private
void
createActionList() {
View view;
String title;
Drawable icon;
OnClickListener listener;
int
index
=
1
;
for
(
int
i
=
0
; i
<
actionList.size(); i
++
) {
title
=
actionList.get(i).getTitle();
icon
=
actionList.get(i).getIcon();
listener
=
actionList.get(i).getListener();
//
得到action item
view
=
getActionItem(title, icon, listener);
view.setFocusable(
true
);
view.setClickable(
true
);
//
将其加入布局
mTrack.addView(view, index);
index
++
;
}
}
/**
* 获得 action item
*
*
@param
title action的标题
*
@param
icon action的图标
*
@param
listener action的点击事件监听器
*
@return
action的item
*/
private
View getActionItem(String title, Drawable icon, OnClickListener listener) {
//
装载action布局
LinearLayout container
=
(LinearLayout) inflater.inflate(R.layout.action_item,
null
);
ImageView img
=
(ImageView) container.findViewById(R.id.icon);
TextView text
=
(TextView) container.findViewById(R.id.title);
if
(icon
!=
null
) {
img.setImageDrawable(icon);
}
else
{
img.setVisibility(View.GONE);
}
if
(title
!=
null
) {
text.setText(title);
}
else
{
text.setVisibility(View.GONE);
}
if
(listener
!=
null
) {
container.setOnClickListener(listener);
}
return
container;
}
/**
* 显示箭头
*
*
@param
箭头资源id
*
@param
距离屏幕左边的距离
*/
private
void
showArrow(
int
whichArrow,
int
requestedX) {
final
View showArrow
=
(whichArrow
==
R.id.arrow_up)
?
mArrowUp : mArrowDown;
final
View hideArrow
=
(whichArrow
==
R.id.arrow_up)
?
mArrowDown : mArrowUp;
final
int
arrowWidth
=
mArrowUp.getMeasuredWidth();
showArrow.setVisibility(View.VISIBLE);
ViewGroup.MarginLayoutParams param
=
(ViewGroup.MarginLayoutParams) showArrow.getLayoutParams();
//
以此设置距离左边的距离
param.leftMargin
=
requestedX
-
arrowWidth
/
2
;
hideArrow.setVisibility(View.INVISIBLE);
}
}
有点长,不过注释都写的很清楚了。show()方法完成窗口的弹出。里面调用其他方法设置了窗口弹出的位置,设置了相应的动画弹出风格和箭头朝向以及位置,创建了action item。大家可以从这个方法里开始看,看每个的实现。
最后写个测试类。放一个Button在屏幕顶部,一个在屏幕底部。点击弹出弹窗。
package
com.notice.quickaction;
import
android.app.Activity;
import
android.os.Bundle;
import
android.view.View;
import
android.view.View.OnClickListener;
import
android.widget.Button;
import
android.widget.Toast;
/**
* 实现activity
*/
public
class
MyQuick
extends
Activity {
@Override
public
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.main);
//
得到一个actionItem对象
final
ActionItem chart
=
new
ActionItem();
//
设置标题,图标,点击事件
chart.setTitle(
"
Chart
"
);
chart.setIcon(getResources().getDrawable(R.drawable.chart));
chart.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
Toast.makeText(MyQuick.
this
,
"
Chart selected
"
, Toast.LENGTH_SHORT).show();
}
});
final
ActionItem production
=
new
ActionItem();
production.setTitle(
"
Products
"
);
production.setIcon(getResources().getDrawable(R.drawable.production));
production.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
Toast.makeText(MyQuick.
this
,
"
Products selected
"
, Toast.LENGTH_SHORT).show();
}
});
Button btn1
=
(Button)
this
.findViewById(R.id.btn1);
//
点击按钮弹出
btn1.setOnClickListener(
new
View.OnClickListener() {
@Override
public
void
onClick(View v) {
//
初始化一个QuickActions
QuickActions qa
=
new
QuickActions(v);
//
为他添加actionitem
qa.addActionItem(chart);
qa.addActionItem(production);
qa.addActionItem(production);
qa.addActionItem(production);
//
设置动画风格
qa.setAnimStyle(QuickActions.ANIM_AUTO);
qa.show();
}
});
final
ActionItem dashboard
=
new
ActionItem();
dashboard.setIcon(getResources().getDrawable(R.drawable.dashboard));
dashboard.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
Toast.makeText(MyQuick.
this
,
"
dashboard selected
"
, Toast.LENGTH_SHORT).show();
}
});
final
ActionItem users
=
new
ActionItem();
users.setIcon(getResources().getDrawable(R.drawable.users));
users.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
Toast.makeText(MyQuick.
this
,
"
Products selected
"
, Toast.LENGTH_SHORT).show();
}
});
Button btn2
=
(Button)
this
.findViewById(R.id.btn2);
btn2.setOnClickListener(
new
OnClickListener() {
@Override
public
void
onClick(View v) {
QuickActions qa
=
new
QuickActions(v);
qa.addActionItem(dashboard);
qa.addActionItem(users);
qa.setAnimStyle(QuickActions.ANIM_GROW_FROM_CENTER);
qa.show();
}
});
}
}
再讲下PopupWindow的风格的实现。其中一个风格代码如下:
<
style
name
="Animations.PopDownMenu.Left"
>
<
item
name
="@android:windowEnterAnimation"
>
@anim/grow_from_topleft_to_bottomright
</
item
>
<
item
name
="@android:windowExitAnimation"
>
@anim/shrink_from_bottomright_to_topleft
</
item
>
</
style
>
写两个item,分别实现弹出和消失动画。因为篇幅有限(好像已经很长了。。。),就不全部贴出来了。动画都是一个scale加一个alpha,对动画不熟悉的朋友可以自己研究下,从底部弹出的动画文件grow_from_bottom.xml:
<?
xml version="1.0" encoding="utf-8"
?>
<
set
xmlns:android
="http://schemas.android.com/apk/res/android"
>
<
scale
android:fromXScale
="0.3"
android:toXScale
="1.0"
android:fromYScale
="0.3"
android:toYScale
="1.0"
android:pivotX
="50%"
android:pivotY
="100%"
android:duration
="@android:integer/config_shortAnimTime"
/>
<
alpha
android:interpolator
="@android:anim/decelerate_interpolator"
android:fromAlpha
="0.0"
android:toAlpha
="1.0"
android:duration
="@android:integer/config_shortAnimTime"
/>
</
set
>
最后来看看实现效果:
好了 希望大家喜欢 有问题可以留言交流~
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