安卓下测试网络连接是否可用的问题

API文档内容：

NetworkInfo android.net.ConnectivityManager.getActiveNetworkInfo()


Returns details about the currently active default data network. When connected, this network is the default route for outgoing connections. You should always check

NetworkInfo.isConnected()

before
initiating network traffic. This may return

null

when there is no default network.

Returns:a

NetworkInfo

object for the current default network or

null

if no network default network is currently active
This method requires the call to hold the permission

android.Manifest.permission.ACCESS_NETWORK_STATE

.

API里提到的权限是

android.Manifest.permission.ACCESS_NETWORK_STATE

.

实际执行的时候却报错

08-26 09:14:44.896: E/AndroidRuntime(12009): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testnetwork/com.example.testnetwork.MainActivity}: java.lang.SecurityException: ConnectivityService: Neither user 10102 nor current process has android.permission.ACCESS_NETWORK_STATE.

08-26 09:16:47.651: E/AndroidRuntime(12276): Caused by: java.lang.SecurityException: ConnectivityService: Neither user 10102 nor current process has android.permission.ACCESS_NETWORK_STATE.

报错提示缺少权限android.permission.ACCESS_NETWORK_STATE.

添加之后正常，但是有个小细节，添加权限的时候不能在代码里面添加，应该是个bug，我在代码里面添加之后任然报这个错，即使clean了工程重启eclipse之后还是一样的错误。后来在图形界面添加之后正常