Change android proxy settings

i'm trying to write an app that can change the proxy settings on android 2.2.1 but i receive a permission exception.

I execute this within my code: Settings.Secure.putString(resolver,Settings.Secure.HTTP_开发者_运维知识库PROXY, "127.0.0.1:8080");

In the manifest i specified the WRITE_SETTINGS and WRITE_SECURE_SETTINGS permissions, but i receive this exception.

Permission denial: writing to secure settings requires android.permission.WRITE_SECURE_SETTINGS

I read that only system apps can change these settings directly, how can i change it.

In the apis like 2.0 is seems to work, but in 2.2 the proxy setting was moved to Secure class.

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An app called APNPT changes the settings, you may want to take a peak on the code:

https://github.com/r3pek/APNpt

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Please have a look at this library:

https://github.com/shouldit/android-proxy/tree/master/android-proxy-library