android系统进程手机内存工具类

    public class TaskUtils {  
      
        /** 
         * 获取正在运行的进程的个数 
         *  
         * @param context 
         * @return 
         */  
        public static int getRunningProcessCount(Context context) {  
            // 得到系统的任务管理器.  
            ActivityManager am = (ActivityManager) context  
                    .getSystemService(Context.ACTIVITY_SERVICE);  
            return am.getRunningAppProcesses().size();  
        }  
      
        /** 
         * 获取手机的可用内存 
         *  
         * @param context 
         * @return long类型数据 总的可用内存 
         */  
        public static long getAvailRam(Context context) {  
            ActivityManager am = (ActivityManager) context  
                    .getSystemService(Context.ACTIVITY_SERVICE);  
            ActivityManager.MemoryInfo outInfo = new MemoryInfo();  
            am.getMemoryInfo(outInfo);  
            return outInfo.availMem;  
        }  
      
        /** 
         * 获取手机的总内存 
         *  
         * @return 
         */  
        public static long getTotalRam() {  
            try {  
                File file = new File("/proc/meminfo");  
                FileInputStream fis = new FileInputStream(file);  
                BufferedReader br = new BufferedReader(new InputStreamReader(fis));  
                // MemTotal: 253604 kB  
                String result = br.readLine();  
                StringBuffer sb = new StringBuffer();  
                char[] chars = result.toCharArray();  
                for (char c : chars) {  
                    if (c >= '0' && c <= '9') {  
                        sb.append(c);  
                    }  
                }  
                return Long.parseLong(sb.toString()) * 1024;  
            } catch (Exception e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
                return 0;  
      
            }  
        }  
    }