Restart the service when phone restarts in android

How can I restart my service when phone restarts?

This is what I am currently using to start the service:

Intent a = new Intent();
     开发者_JAVA百科           a.setAction("com.service.Service");
                startService(a);

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Here is a tutorial for this.

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Use a BOOT_COMPLETED broadcast receiver and start the service from within it.