Starting application taking too long

I'm working with eclipse, when starting an application, eclipse does the installation of the app on the device and then displays the message : "Starting activity ----- on device -----" (which is my phone connected to the PC) is taking a very long time and eventually nothing happens. I've tried waiting even 10 minutes. Then I give up and open the 开发者_StackOverflowapp from my menu.

Did anyone encounter this problem?

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Try to see the logcat for error