标签：rri return bsp 单例类 ble ring 继承 launch 获取
Application全局唯一，如果需要放置全局的变量，需要用到Application,类似于OC中的单例类，获者OC中的AppDelegate
第一步：创建一个AppContext继承Application
public class AppContext extends Application {
private static AppContext instance;
public static AppContext getInstance() {
return instance;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
instance = this;
}
}
第二步：注册
<application
android:name=".AppContext"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
如果我们需要获取Context:
AppContext.getInstance().getExternalFilesDir(null);
标签：rri return bsp 单例类 ble ring 继承 launch 获取
原文地址：http://www.cnblogs.com/hualuoshuijia/p/6915481.html
