android图层划分(PhoneWindowManager.windowTypeToLayerLw) 图层id
public int windowTypeToLayerLw(int type) {
if (type >= FIRST_APPLICATION_WINDOW&& type <= LAST_APPLICATION_WINDOW) {
return 2;
}
switch (type) {
case TYPE_UNIVERSE_BACKGROUND:
return 1;
case TYPE_PRIVATE_PRESENTATION:
return 2;
case TYPE_WALLPAPER:
// wallpaperis at the bottom, though the window manager may move it.
return 2;
case TYPE_PHONE:
return 3;
case TYPE_SEARCH_BAR:
return 4;
case TYPE_RECENTS_OVERLAY:
case TYPE_SYSTEM_DIALOG:
return 5;
case TYPE_TOAST:
// toasts andthe plugged-in battery thing
return 6;
case TYPE_PRIORITY_PHONE:
// SIM errorsand unlock. Not sure if this reallyshould be in a high layer.
return 7;
case TYPE_DREAM:
// used forDreams (screensavers with TYPE_DREAM windows)
return 8;
caseTYPE_SYSTEM_ALERT:
// like the ANR/ app crashed dialogs
return 9;
case TYPE_INPUT_METHOD:
// on-screenkeyboards and other such input method user interfaces go here.
return 10;
case TYPE_INPUT_METHOD_DIALOG:
// on-screenkeyboards and other such input method user interfaces go here.
return 11;
case TYPE_KEYGUARD_SCRIM:
// the safetywindow that shows behindkeyguard while keyguard is starting
return 12;
case TYPE_KEYGUARD:
// the keyguard;nothing on top of these can take focus, since they are
// responsiblefor power management when displayed.
return 13;
case TYPE_KEYGUARD_DIALOG:
return 14;
case TYPE_STATUS_BAR_SUB_PANEL:
return 15;
case TYPE_STATUS_BAR:
return 16;
case TYPE_STATUS_BAR_PANEL:
return 17;
case TYPE_VOLUME_OVERLAY:
// theon-screen volume indicator and controller shown when the user
// changes thedevice volume
return 18;
case TYPE_SYSTEM_OVERLAY:
// theon-screen volume indicator and controller shown when the user
// changes thedevice volume
return 19;
case TYPE_NAVIGATION_BAR:
// thenavigation bar, if available, shows atop most things
return 20;
case TYPE_NAVIGATION_BAR_PANEL:
// some panels(e.g. search) need to show on top of the navigation bar
return 21;
case TYPE_SYSTEM_ERROR:
// system-levelerror dialogs
return 22;
case TYPE_MAGNIFICATION_OVERLAY:
// used tohighlight the magnified portion of a display
return 23;
case TYPE_DISPLAY_OVERLAY:
// used tosimulate secondary display devices
return 24;
case TYPE_DRAG:
// the draglayer: input for drag-and-drop is associated with this window,
// which sitsabove all other focusable windows
return 25;
case TYPE_SECURE_SYSTEM_OVERLAY:
return 26;
case TYPE_BOOT_PROGRESS:
return 27;
case TYPE_POINTER:
// the (mouse)pointer layer
return 28;
case TYPE_HIDDEN_NAV_CONSUMER:
return 29;
}
Log.e(TAG,"Unknown window type: " + type);
return 2;
}