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The event fires when an application is retrieved from the background.
document.addEventListener("resume", yourCallbackFunction, false);
The resume
event fires when the native platform pulls the application out from the background.
Applications typically should use document.addEventListener
to attach an event listener once the deviceready
event fires.
document.addEventListener("resume", onResume, false); function onResume() { // Handle the resume event }
<!DOCTYPE html> <html> <head> <title>Resume Example</title> <script type="text/javascript" charset="utf-8" src="cordova-x.x.x.js"></script> <script type="text/javascript" charset="utf-8"> // Wait for device API libraries to load // function onLoad() { document.addEventListener("deviceready", onDeviceReady, false); } // device APIs are available // function onDeviceReady() { document.addEventListener("resume", onResume, false); } // Handle the resume event // function onResume() { } </script> </head> <body onload="onLoad()"> </body> </html>
Any interactive functions called from a pause
event handler execute later when the app resumes, as signaled by the resume
event. These include alerts, console.log()
, and any calls from plugins or the Cordova API, which go through Objective-C.
active event
The iOS-specific active
event is available as an alternative to resume
, and detects when users disable the Lock button to unlock the device with the app running in the foreground. If the app (and device) is enabled for multi-tasking, this is paired with a subsequent resume
event, but only under iOS 5. In effect, all locked apps in iOS 5 that have multi-tasking enabled are pushed to the background. For apps to remain running when locked under iOS 5, disable the app's multi-tasking by setting UIApplicationExitsOnSuspend to YES
. To run when locked on iOS 4, this setting does not matter.
resume event
When called from a resume
event handler, interactive functions such as alert()
need to be wrapped in a setTimeout()
call with a timeout value of zero, or else the app hangs. For example:
document.addEventListener("resume", onResume, false); function onResume() { setTimeout(function() { // TODO: do your thing! }, 0); }