Create a new Android app to set the main activity

File--new--android Application Project

Main class inherits activity

Class mainactivity extends activity{    @Override    void// TODO auto-generated method Stub  Super.oncreate (savedinstancestate); Setcontentview (r.layout.mainactivity); }}

Setcontentview (r.drawable import COM.EXAMPLE.ACTIVITY.R;

Create layout

Set in Androidmanifest.xml

<Application android:allowbackup="True"android:icon="@drawable/ic_launcher " Android:label= @string/app_name " Android:theme= " @style/apptheme" > < activity android:name= " com.example.lianxi.mainactivity// declare this mainactivity <intent-filter > <action Android:name= "android.intent.action.main "/> </intent-filter> </activity> </application>        

Create a new Android app to set the main activity