An error can be reported when a network virtual machine is accessed after Android sdk2.3.3.

Add the oncreate METHOD TO THE ACTIVITY

Strictmode. setthreadpolicy (New strictmode. threadpolicy. builder (). detectdiskreads (). detectdiskwrites (). detectnetwork (). penaltylog (). build (); strictmode. setvmpolicy (New strictmode. vmpolicy. builder (). detectleakedsqlliteobjects (). penaltylog (). penaltydeath (). build (); // print logcat // test SQLite

Column:

@ Overrideprotected void oncreate (bundle savedinstancestate) {strictmode. setthreadpolicy (New strictmode. threadpolicy. builder (). detectdiskreads (). detectdiskwrites (). detectnetwork (). penaltylog (). build (); strictmode. setvmpolicy (New strictmode. vmpolicy. builder (). detectleakedsqlliteobjects (). penaltylog (). penaltydeath (). build (); // print logcat // test sqlitesuper. oncreate (savedinstancestate); setcontentview (R. layout. activity_main); initview ();}

Add network access permissions to androidmanifest. xml

<uses-permission android:name="android.permission.INTERNET" />