* 文件名：BaseActivity.java    * 版本号：         * 日期：2012-11-11  */ package com.wadata.mobilefollowup.view.base; import java.util.List; import android.app.Activity; import android.app.ActivityManager; import android.app.ActivityManager.RunningAppProcessInfo; import android.content.Context; /** * 名称：BaseActivity  * 描述：  * 创建人： tr * 日期：2012-6-20 下午5:53:35  * 变更： */ public class BaseActivity extends Activity {         @Override         protected void onStop() {                 // TODO Auto-generated method stub                 super.onStop();                 if (!isAppOnForeground()) {                         //app 进入后台                                                   //全局变量isActive = false 记录当前已经进入后台                 }         }         @Override         protected void onResume() {                 // TODO Auto-generated method stub                 super.onResume();                                   //if (!isActive) {                         //app 从后台唤醒，进入前台                                                   //isActive = true;                 //}         }         /**          * 程序是否在前台运行          *           * @return          */         public boolean isAppOnForeground() {                 // Returns a list of application processes that are running on the                 // device                                   ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);                 String packageName = getApplicationContext().getPackageName();                 List
    
      appProcesses = activityManager                                 .getRunningAppProcesses();                 if (appProcesses == null)                         return false;                 for (RunningAppProcessInfo appProcess : appProcesses) {                         // The name of the process that this object is associated with.                         if (appProcess.processName.equals(packageName)                                         && appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {                                 return true;                         }                 }                 return false;         } }