做网站需要公章吗,怎样制作免费网页,网页设计代码中form的用法,营销策划案1.Application是程序真正的入口#xff0c;启动时会先执行Application再执行其他组件。2.建立自己的Application类#xff0c;需要在xml里将application修改自己的application类#xff1a;applicationandroid:namecom.example.aexh_19_application.MyApplication… 1.Application是程序真正的入口启动时会先执行Application再执行其他组件。2.建立自己的Application类需要在xml里将application修改自己的application类applicationandroid:namecom.example.aexh_19_application.MyApplication范例public class MyApplication extends Application
{Overridepublic void onCreate(){super.onCreate();Log.e(MyApplication, MyApplication);}
}activity类public class MainActivity extends Activity
{/** XML里修改属性改为自己的类入口* application* android:namecom.example.aexh_19_application.MyApplication* 先执行application 在执行activity**/Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Log.e(MainActivity, MainActivity);Application app getApplication();Log.e(MainActivity, app.toString());}} 转载于:https://blog.51cto.com/glblong/1227225
