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public static List
   
     getTaskInfos(Context context)  {        //首先获取到进程管理器        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        //获取到运行的进程        List
    
      runningAppProcesses = activityManager.getRunningAppProcesses();        //初始化进程的集合        List
     
       taskInfos = new ArrayList<>();        //迭代所有正在运行的进程        for (ActivityManager.RunningAppProcessInfo runningAppProcess : runningAppProcesses) {            TaskInfo taskInfo = new TaskInfo();            //获取到进程的名字            String processName = runningAppProcess.processName;            taskInfo.setAppPackageName(processName);            //获取到进程的内存的基本信息            Debug.MemoryInfo[] processMemoryInfo = activityManager.getProcessMemoryInfo(new int[]{runningAppProcess.pid});            int totalPrivateDirty = processMemoryInfo[0].getTotalPrivateDirty() * 1024;            taskInfo.setMemorySize(totalPrivateDirty);        }        return taskInfos;    }
     
    
   

通过读取系统文件的方式，获得运行内存大小

//获取总内存的大小    private long getTotalMemory() {//        MemTotal:         341780 kB        try {            FileInputStream fis = new FileInputStream(new File("/proc/meminfo"));            //包装一个一行行读取的流            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(fis));            //取到所有的内存信息            String memTotal = bufferedReader.readLine();            StringBuffer sb = new StringBuffer();            for (char c : memTotal.toCharArray()) {                if (c >= '0' && c <= '9') {                    sb.append(c);                }            }            //为了方便格式化 所以乘以1024            long totalMemory = Long.parseLong(sb.toString()) * 1024;            return totalMemory;        } catch (Exception e) {            e.printStackTrace();            return 0;        }    }

//获取到进程管理者        ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);        //杀死后台进程        activityManager.killBackgroundProcesses(应用程序包名);

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