android 系统内存显示

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1、系统总内存

//查看总内存    private String GetTotalMemory() {        String str1 = "/proc/meminfo";        String str2;        Double memory = 0.0;        try {            FileReader r = new FileReader(str1);            BufferedReader bufferedRead = new BufferedReader(r, 8192);            str2 = bufferedRead.readLine();            String str4 = str2.substring(str2.length() - 9, str2.length() - 3);            memory = Double.parseDouble(str4) / 1000;        } catch (Exception e) {            // TODO: handle exception            e.printStackTrace();        }        return memory+"M";    }

2、所剩内存

private String getRestMemory() {            final ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);            ActivityManager.MemoryInfo info = new ActivityManager.MemoryInfo();           activityManager.getMemoryInfo(info);            Log.i("Main:","系统剩余内存:"+(info.availMem >> 10)+"k");           Log.i("Main:","系统是否处于低内存运行："+info.lowMemory);        Log.i("Main:","当系统剩余内存低于"+info.threshold+"时就看成低内存运行");        return (info.availMem >> 10)/1024 + "M " +(info.availMem >> 10)%1024 + "k";    }

3、使用

String s = "系统内存："+GetTotalMemory()+"\n"+"系统剩余内存:"+displayBriefMemory();

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