Android: ANR

http://groups.google.com/group/android-platform/browse_thread/thread/84b200dda6300e39/021bf4d3de280321?lnk=gst&q=anr#021bf4d3de280321
http://developer.android.com/intl/zh-TW/guide/practices/design/responsiveness.html

Why:

• No response to an input event (e.g. key press, screen touch) within 5 seconds
• A BroadcastReceiver hasn't finished executing within 10 seconds

Solution:

• any method that runs in the main thread should do as little work as possible
• Activities should do as little as possible to set up in key life-cycle methods such as onCreate() and onResume()
• Potentially long running operations should be done in a child thread, your main thread should provide a Handler for child threads to post back to upon completion
• your application should start a Service if a potentially long running action needs to be taken in response to an Intent broadcast
• avoid starting an Activity from an Intent Receiver