Android JNI layer creates Linux socket error problem resolution

Problem:

To create a UDP socket on the JNI layer to communicate with the server, but did not succeed, and finally found that the creation of the socket failed (code below)

Create SOCKETG_SD = socket (af_inet, SOCK_DGRAM, 0), if ( -1 = = g_sd) {perror ("socket ()"); goto Err_socket;}

Workaround:

In the Androidmanifest.xml file, add permissions to access the network:

<uses-permission android:name= "Android.permission.INTERNET"/>
(Add location below)

<?xml version= "1.0" encoding= "Utf-8"? ><manifest xmlns:android= "http://schemas.android.com/apk/res/        Android "package=" Com.aran.envmonitor "android:versioncode=" 1 "android:versionname=" 1.0 "> <uses-sdk android:minsdkversion= "android:targetsdkversion="/> <!--Add Network access and <uses-permissio n android:name= "Android.permission.INTERNET"/> <application android:allowbackup= "true" Android:ico n= "@drawable/ic_launcher" android:label= "@string/app_name" android:theme= "@style/apptheme" > <u Ses-library android:name= "Env_tools"/> <activity android:name= ". Mainactivity "android:label=" @string/app_name "> <intent-filter> <action Android:name= "Android.intent.action.MAIN"/> <category android:name= "Android.intent.category.LAUNCHER "/> </intent-filter> </activity> &LT;/application></manifest>