大鹏一日同风起,扶摇直上九万里。这篇文章主要讲述Android悬浮窗原理解析(Window)[源码]相关的知识,希望能为你提供帮助。
悬浮窗,在大多数应用中还是很少见的,目前我们接触到的悬浮窗,差不多都是一些系统级的应用软件,例如:360安全卫士,腾讯手机管家等;在某些服务行业如金融,餐饮等,也会在应用中添加悬浮窗,例如:美团的偷红包,博闻金融快捷联系等。但两种悬浮窗还是有区别的:
- 系统悬浮窗:所有界面都会展示,包括主屏、锁屏
- 应用悬浮窗:只在应用Activity中展示。
- 应用窗口:所谓应用窗口指的就是该窗口对应一个Activity,因此,要创建应用窗口就必须在Activity中完成了。
- 子窗口:所谓子窗口指的是必须依附在某个父窗口之上,比如PopWindow,Dialog。
- 系统窗口:所谓系统窗口指的是由系统进程创建,不依赖于任何应用或者不依附在任何父窗口之上,如:Toast,来电窗口等。
文章图片
- 应用窗口:层级范围是1~99
- 子窗口:层级范围是1000~1999
- 系统窗口:层级范围是2000~2999
i.应用窗口(1~99)
//第一个应用窗口
public static final int FIRST_APPLICATION_WINDOW = 1;
//所有程序窗口的base窗口,其他应用程序窗口都显示在它上面
public static final int TYPE_BASE_APPLICATION= 1;
//所有Activity的窗口,只能配合Activity在当前APP使用
public static final int TYPE_APPLICATION= 2;
//目标应用窗口未启动之前的那个窗口
public static final int TYPE_APPLICATION_STARTING = 3;
//最后一个应用窗口
public static final int LAST_APPLICATION_WINDOW = 99;
ii.子窗口(1000~1999)
//第一个子窗口
public static final int FIRST_SUB_WINDOW= 1000;
// 面板窗口,显示于宿主窗口的上层,只能配合Activity在当前APP使用
public static final int TYPE_APPLICATION_PANEL= FIRST_SUB_WINDOW;
// 媒体窗口(例如视频),显示于宿主窗口下层
public static final int TYPE_APPLICATION_MEDIA= FIRST_SUB_WINDOW+1;
// 应用程序窗口的子面板,只能配合Activity在当前APP使用(PopupWindow默认就是这个Type)
public static final int TYPE_APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW+2;
//对话框窗口,只能配合Activity在当前APP使用
public static final int TYPE_APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW+3;
//
public static final int TYPE_APPLICATION_MEDIA_OVERLAY= FIRST_SUB_WINDOW+4;
//最后一个子窗口
public static final int LAST_SUB_WINDOW= 1999;
iii.系统窗口(2000~2999)
//系统窗口,非应用程序创建
public static final int FIRST_SYSTEM_WINDOW= 2000;
//状态栏,只能有一个状态栏,位于屏幕顶端,其他窗口都位于它下方
public static final int TYPE_STATUS_BAR= FIRST_SYSTEM_WINDOW;
//搜索栏,只能有一个搜索栏,位于屏幕上方
public static final int TYPE_SEARCH_BAR= FIRST_SYSTEM_WINDOW+1;
//
//电话窗口,它用于电话交互(特别是呼入),置于所有应用程序之上,状态栏之下,属于悬浮窗(并且给一个Activity的话按下HOME键会出现看不到桌面上的图标异常情况)
public static final int TYPE_PHONE= FIRST_SYSTEM_WINDOW+2;
//
//系统警告提示窗口,出现在应用程序窗口之上,属于悬浮窗, 但是会被禁止
public static final int TYPE_SYSTEM_ALERT= FIRST_SYSTEM_WINDOW+3;
//
//信息窗口,用于显示Toast, 不属于悬浮窗, 但有悬浮窗的功能, 缺点是在Android2.3上无法接收点击事件
public static final int TYPE_TOAST= FIRST_SYSTEM_WINDOW+5;
//
public static final int TYPE_KEYGUARD= FIRST_SYSTEM_WINDOW+4;
//锁屏窗口
public static final int TYPE_KEYGUARD= FIRST_SYSTEM_WINDOW+4;
//系统顶层窗口,显示在其他一切内容之上,此窗口不能获得输入焦点,否则影响锁屏
public static final int TYPE_SYSTEM_OVERLAY= FIRST_SYSTEM_WINDOW+6;
//电话优先,当锁屏时显示,此窗口不能获得输入焦点,否则影响锁屏
public static final int TYPE_PRIORITY_PHONE= FIRST_SYSTEM_WINDOW+7;
//系统对话框窗口
public static final int TYPE_SYSTEM_DIALOG= FIRST_SYSTEM_WINDOW+8;
//锁屏时显示的对话框
public static final int TYPE_KEYGUARD_DIALOG= FIRST_SYSTEM_WINDOW+9;
//系统内部错误提示,显示在任何窗口之上
public static final int TYPE_SYSTEM_ERROR= FIRST_SYSTEM_WINDOW+10;
//内部输入法窗口,显示于普通UI之上,应用程序可重新布局以免被此窗口覆盖
public static final int TYPE_INPUT_METHOD= FIRST_SYSTEM_WINDOW+11;
//内部输入法对话框,显示于当前输入法窗口之上
public static final int TYPE_INPUT_METHOD_DIALOG= FIRST_SYSTEM_WINDOW+12;
//墙纸窗口
public static final int TYPE_WALLPAPER= FIRST_SYSTEM_WINDOW+13;
//状态栏的滑动面板
public static final int TYPE_STATUS_BAR_PANEL= FIRST_SYSTEM_WINDOW+14;
//安全系统覆盖窗口,这些窗户必须不带输入焦点,否则会干扰键盘
public static final int TYPE_SECURE_SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW+15;
//最后一个系统窗口
public static final int LAST_SYSTEM_WINDOW= 2999;
2.窗口flags显示属性在WindowManager中也有定义:
//窗口特征标记
public int flags;
//当该window对用户可见的时候,允许锁屏
public static final int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON= 0x00000001;
//窗口后面的所有内容都变暗
public static final int FLAG_DIM_BEHIND= 0x00000002;
//Flag:窗口后面的所有内容都变模糊
public static final int FLAG_BLUR_BEHIND= 0x00000004;
//窗口不能获得焦点
public static final int FLAG_NOT_FOCUSABLE= 0x00000008;
//窗口不接受触摸屏事件
public static final int FLAG_NOT_TOUCHABLE= 0x00000010;
//即使在该window在可获得焦点情况下,允许该窗口之外的点击事件传递到当前窗口后面的的窗口去
public static final int FLAG_NOT_TOUCH_MODAL= 0x00000020;
//当手机处于睡眠状态时,如果屏幕被按下,那么该window将第一个收到触摸事件
public static final int FLAG_TOUCHABLE_WHEN_WAKING = 0x00000040;
//当该window对用户可见时,屏幕出于常亮状态
public static final int FLAG_KEEP_SCREEN_ON= 0x00000080;
//:让window占满整个手机屏幕,不留任何边界
public static final int FLAG_LAYOUT_IN_SCREEN= 0x00000100;
//允许窗口超出整个手机屏幕
public static final int FLAG_LAYOUT_NO_LIMITS= 0x00000200;
//window全屏显示
public static final int FLAG_FULLSCREEN= 0x00000400;
//恢复window非全屏显示
public static final int FLAG_FORCE_NOT_FULLSCREEN= 0x00000800;
//开启窗口抖动
public static final int FLAG_DITHER= 0x00001000;
//安全内容窗口,该窗口显示时不允许截屏
public static final int FLAG_SECURE= 0x00002000;
//锁屏时显示该窗口
public static final int FLAG_SHOW_WHEN_LOCKED = 0x00080000;
//系统的墙纸显示在该窗口之后
public static final int FLAG_SHOW_WALLPAPER = 0x00100000;
//当window被显示的时候,系统将把它当做一个用户活动事件,以点亮手机屏幕
public static final int FLAG_TURN_SCREEN_ON = 0x00200000;
//该窗口显示,消失键盘
public static final int FLAG_DISMISS_KEYGUARD = 0x00400000;
//当该window在可以接受触摸屏情况下,让因在该window之外,而发送到后面的window的触摸屏可以支持split touch
public static final int FLAG_SPLIT_TOUCH = 0x00800000;
//对该window进行硬件加速,该flag必须在Activity或Dialog的Content View之前进行设置
public static final int FLAG_HARDWARE_ACCELERATED = 0x01000000;
//让window占满整个手机屏幕,不留任何边界
public static final int FLAG_LAYOUT_IN_OVERSCAN = 0x02000000;
//透明状态栏
public static final int FLAG_TRANSLUCENT_STATUS = 0x04000000;
//透明导航栏
3.添加View到Window的流程代码:
contactView = new ContactView(mContext);
if (layoutParams == null) www.yongshiyule178.com
{
layoutParams = new WindowManager.LayoutParams();
layoutParams.width = contactView.width;
layoutParams.height = contactView.height;
layoutParams.x += ScreenSizeUtil.getScreenWidth(www.078881.cn
);
layoutParams.y += ScreenSizeUtil.getScreenHeight(www.345608.cn/) - ScreenSizeUtil.dp2px(150);
layoutParams.gravity =www.taohuayuan178.com
Gravity.TOP | Gravity.LEFT;
if (Build.VERSION.SDK_INT >
18 &
&
Build.VERSION.SDK_INT <
www.feifanyule.cn 23) {
layoutParams.type = WindowManager.LayoutParams.TYPE_TOAST;
//Type设置
} else {
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION;
}
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
//Flags设置,窗口属性
layoutParams.format = PixelFormat.RGBA_8888;
悬浮窗添加原理:View添加到Window源码解析
Window在Android系统中十分重要,其Activity,Dialog的创建都离不开Window.具体Activity,Dialog是怎么添加到Window上的,详情如:
Activity的加载流程;
Dialog加载绘制流程
二、两种悬浮窗在前言中已说到,悬浮窗在app中,分为两种:系统级别和应用级别。其中系统级别可以在任何界面展示,包括主屏、锁屏(看需要),应用级别只在应用中展示。通过上面对Window的认识,我们可以知道实现方式:
- 系统级别可以通过type设置为:TYPE_TOAST、TYPE_PHONE、TYPE_SYSTEM_ALERT;
- 应用级别可以通过type设置为:TYPE_APPLICATION、TYPE_APPLICATION_ATTACHED_DIALOG;
WindowManager.addView -> ViewRootImpl.setView -> WindowSession.addToDisplay(AIDL进行IPC) -> WindowManagerService.addWindow() -> ViewRootImpl.setView
1.系统悬浮窗
对于系统级别的悬浮窗来说,不同的设置,不同的Android版本,需要权限和交互都不同。通过阅读源码android4.4知:
android 7.1.1的addWindow方法为:
public int addWindow(Session session, IWindow client, int seq,
WindowManager.LayoutParams attrs, int viewVisibility, int displayId,
Rect outContentInsets, InputChannel outInputChannel) {
int[] appOp = new int[1];
int res = mPolicy.checkAddPermission(attrs, appOp);
if (res != WindowManagerGlobal.ADD_OKAY) {
return res;
}
......
final int type = attrs.type;
......
} else if (type == TYPE_TOAST) {//android 7.1.1 添加代码(其他版本无)
// Apps targeting SDK above N MR1 cannot arbitrary add toast windows.
addToastWindowRequiresToken = doesAddToastWindowRequireToken(attrs.packageName,
callingUid, attachedWindow);
if (addToastWindowRequiresToken &
&
token.windowType != TYPE_TOAST) {
Slog.w(TAG_WM, "Attempted to add a toast window with bad token "
+ attrs.token + ".Aborting.");
return WindowManagerGlobal.ADD_BAD_APP_TOKEN;
}
}....
synchronized(mWindowMap) {
......mPolicy.adjustWindowParamsLw(win.mAttrs);
权限检查checkAddPermission(www.tiaotiaoylzc.com)方法:
//权限检查
@Override
public int checkAddPermission(WindowManager.www.chaoyueyule.com LayoutParams attrs, int[] outAppOp) {
int type = attrs.type;
outAppOp[0] = AppOpsManager.OP_NONE;
if (type <
WindowManager.LayoutParams.FIRST_SYSTEM_WINDOW
|| type >
WindowManager.LayoutParams.LAST_SYSTEM_WINDOW) {
return WindowManagerGlobal.ADD_OKAY;
}
String permission = null;
switch (type) {
case TYPE_TOAST:
// XXX right now the app process has complete control over
// this...should introduce www.00534.cn
a token to let the system
// monitor/control what they are doing.
break;
case TYPE_DREAM:
case TYPE_INPUT_METHOD:
case TYPE_WALLPAPER:
case TYPE_PRIVATE_PRESENTATION:
// The window manager www.dongfan178.com will check these.
break;
case TYPE_PHONE:
case TYPE_PRIORITY_PHONE:
case TYPE_SYSTEM_ALERT:
case TYPE_SYSTEM_ERROR:
case TYPE_SYSTEM_OVERLAY:
permission = android.Manifest.permission.SYSTEM_ALERT_WINDOW;
outAppOp[0] = AppOpsManager.OP_SYSTEM_ALERT_WINDOW;
break;
default:
permission = android.Manifest.permission.INTERNAL_SYSTEM_WINDOW;
}
if (permission != null) {
if (mContext.checkCallingOrSelfPermission(permission)
!= PackageManager.PERMISSION_GRANTED) {
return WindowManagerGlobal.ADD_PERMISSION_DENIED;
}
}
return WindowManagerGlobal.ADD_OKAY;
window的flags属性添加adjustWindowParamsLw()方法
//window的flags属性添加
//Android 2.0 - 2.3.7 PhoneWindowManager
public void adjustWindowParamsLw(WindowManager.LayoutParams attrs) {
switch (attrs.type) {
case TYPE_SYSTEM_OVERLAY:
case TYPE_SECURE_SYSTEM_OVERLAY:
case TYPE_TOAST:
// These types of windows can‘t receive input events.
attrs.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
break;
}
}//Android 4.0.1 - 4.3.1 PhoneWindowManager
public void adjustWindowParamsLw(WindowManager.LayoutParams attrs) {
switch (attrs.type) {
case TYPE_SYSTEM_OVERLAY:
case TYPE_SECURE_SYSTEM_OVERLAY:
case TYPE_TOAST:
// These types of windows can‘t receive input events.
attrs.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
attrs.flags &
= ~WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
break;
}
}//Android 4.4 PhoneWindowManager
@Override
public void adjustWindowParamsLw(WindowManager.LayoutParams attrs) {
switch (attrs.type) {
case TYPE_SYSTEM_OVERLAY:
case TYPE_SECURE_SYSTEM_OVERLAY:
// These types of windows can‘t receive input events.
attrs.flags |= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
attrs.flags &
= ~WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
由上可知:
- Type为TYPE_TOAST:版本低于android4.4的,不能接受触摸事件,无法操作;版本高于Android 7.1.1的无法添加悬浮窗
- Type为TYPE_PHONE:所有android版本都需要权限,版本低于android6.0的manifest中添加权限android.Manifest.permission.SYSTEM_ALERT_WINDOW即可,高于andorid6.0的需要判断权限且手动添加。
- Type为TYPE_SYSTEM_ALERT:同TYPE_PHONE
2.应用悬浮窗
对于应用悬浮窗来说,android版本对其影响不大。
- Type为TYPE_APPLICATION:只要Activity建立了,就可以添加。
- Type为TYPE_APPLICATION_ATTACHED_DIALOG:需要在Activity获取焦点,并且用户可操作时才可添加。
public void addView(View view, ViewGroup.LayoutParams params);
//添加View到Window
public void updateViewLayout(View view, ViewGroup.LayoutParams params);
//更新View在Window中的位置
public void removeView(View view);
//删除View
- 1
- 2
- 3
public class ContactWindowUtil {
private ContactView contactView;
private View dialogView;
private WindowManager windowManager;
private WindowManager.LayoutParams layoutParams;
private WindowManager.LayoutParams dialogParams;
private Context mContext;
private ContactWindowListener mListener;
private ValueAnimator valueAnimator;
private int direction;
private final int LEFT = 0;
private final int RIGHT = 1;
public interface ContactWindowListener {
void onDataCallBack(String str);
}public void setDialogListener(ContactWindowListener listener) {
mListener = listener;
}//私有化构造函数
public ContactWindowUtil(Context context) {
mContext = context;
windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
//windowManager = (WindowManager) FloatWindowApp.getAppContext().getSystemService(Context.WINDOW_SERVICE);
}public void showContactView() {
hideContactView();
contactView = new ContactView(mContext);
if (layoutParams == null) {
layoutParams = new WindowManager.LayoutParams();
layoutParams.width = contactView.width;
layoutParams.height = contactView.height;
layoutParams.x += ScreenSizeUtil.getScreenWidth();
layoutParams.y += ScreenSizeUtil.getScreenHeight() - ScreenSizeUtil.dp2px(150);
layoutParams.gravity = Gravity.TOP | Gravity.LEFT;
if (Build.VERSION.SDK_INT >
18 &
&
Build.VERSION.SDK_INT <
23) {
layoutParams.type = WindowManager.LayoutParams.TYPE_TOAST;
} else {
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION;
}
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
layoutParams.format = PixelFormat.RGBA_8888;
}contactView.setOnTouchListener(touchListener);
contactView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showContactDialog();
}
});
windowManager.addView(contactView, layoutParams);
}/**
* 显示联系弹框
*/
private void showContactDialog() {
hideDialogView();
if (dialogParams == null) {
dialogParams = new WindowManager.LayoutParams();
dialogParams.width = WindowManager.LayoutParams.MATCH_PARENT;
dialogParams.height = WindowManager.LayoutParams.MATCH_PARENT;
dialogParams.gravity = Gravity.CENTER;
if (Build.VERSION.SDK_INT >
18 &
&
Build.VERSION.SDK_INT <
25){
dialogParams.type = WindowManager.LayoutParams.TYPE_TOAST;
} else {
dialogParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG;
}
dialogParams.flags = WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_FULLSCREEN;
dialogParams.format = PixelFormat.RGBA_8888;
}
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
dialogView = layoutInflater.inflate(R.layout.window_contact, null);
TextView okTv = dialogView.findViewById(R.id.mOkTv);
TextView cancleTv = dialogView.findViewById(R.id.mCancleTv);
final TextView contentTv = dialogView.findViewById(R.id.mContentTv);
contentTv.setText(String.format("您确认拨打%s客服电话吗", "4008-111-222"));
cancleTv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
hideDialogView();
}
});
okTv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
hideDialogView();
mListener.onDataCallBack("");
}
});
dialogView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
hideDialogView();
}
});
windowManager.addView(dialogView, dialogParams);
}public void hideAllView() {
hideContactView();
hideDialogView();
}public void hideContactView() {
if (contactView != null) {
windowManager.removeView(contactView);
contactView = null;
stopAnim();
}
}public void hideDialogView() {
if (dialogView != null) {
windowManager.removeView(dialogView);
dialogView = null;
}
}View.OnTouchListener touchListener = new View.OnTouchListener() {
float startX;
float startY;
float moveX;
float moveY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
startX = event.getRawX();
startY = event.getRawY();
moveX = event.getRawX();
moveY = event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
float x = event.getRawX() - moveX;
float y = event.getRawY() - moveY;
//计算偏移量,刷新视图
layoutParams.x += x;
layoutParams.y += y;
windowManager.updateViewLayout(contactView, layoutParams);
moveX = event.getRawX();
moveY = event.getRawY();
break;
case MotionEvent.ACTION_UP:
//判断松手时View的横坐标是靠近屏幕哪一侧,将View移动到依靠屏幕
float endX = event.getRawX();
float endY = event.getRawY();
if (endX <
ScreenSizeUtil.getScreenWidth() / 2) {
direction = LEFT;
endX = 0;
} else {
direction = RIGHT;
endX = ScreenSizeUtil.getScreenWidth() - contactView.width;
}
if(moveX != startX){
starAnim((int) moveX, (int) endX,direction);
}
//如果初始落点与松手落点的坐标差值超过5个像素,则拦截该点击事件
//否则继续传递,将事件交给OnClickListener函数处理
if (Math.abs(startX - moveX) >
5) {
return true;
}
break;
}
return false;
}
};
private void starAnim(int startX, int endX,final int direction) {
if (valueAnimator != null) {
valueAnimator.cancel();
valueAnimator = null;
}
valueAnimator = ValueAnimator.ofInt(startX, endX);
valueAnimator.setDuration(500);
valueAnimator.setRepeatCount(0);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
if(direction == LEFT){
layoutParams.x = (int) animation.getAnimatedValue()-contactView.width/2;
}else{
layoutParams.x = (int) animation.getAnimatedValue();
}
if (contactView != null) {
windowManager.updateViewLayout(contactView, layoutParams);
}
}
});
valueAnimator.setInterpolator(new LinearInterpolator());
valueAnimator.start();
}private void stopAnim() {
if (valueAnimator != null) {
valueAnimator.cancel();
valueAnimator = null;
【Android悬浮窗原理解析(Window)[源码]】悬浮窗源码:https://github.com/awenzeng/FloatWindowDemo
四、注意1.应用悬浮窗WindowManager的获取环境必须是Activity环境,系统悬浮窗可以Activity环境,也可以是全局的环境。如:
windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
//windowManager = (WindowManager) FloatWindowApp.getAppContext().getSystemService(Context.WINDOW_SERVICE);
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3.系统级别Type为TYPE_PHONE、TYPE_SYSTEM_ALERT是权限判断及设置代码:
/**
* 请求用户给予悬浮窗的权限
*/
public void askForPermission() {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(TestFloatWinActivity.this, "当前无权限,请授权!", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:" + getPackageName()));
startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE);
} else {
startService(floatWinIntent);
}
}
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