When I\'m trying to use android \'am\' command to start an activity ,it\'s wrong under 4.2 platform(I tried , it\'s ok under 2.3 version).The code is like this
Permissions are just a line of code that you need to add in the manifest to inform that you accessing those resources and requesting android to allow these resources to use.
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1) i just added an example containing permission.
2) In Linux there is root user ,group and others . 0 comes to root and UID cannot be negative its value is between 0 - 999. See this link