android性能1-内存、CPU获取

来源：互联网发布：淘宝商品链接提取编辑：程序博客网时间：2024/05/18 20:05

内存

通过读取文件”/proc/meminfo”的信息能够获取手机Memory的总量，而通过ActivityManager.getMemoryInfo(ActivityManager.MemoryInfo)方法可以获取当前的可用Memory量。

获取总内存，剩余内存，pid内存

public long getTotalMemory() {        String memInfoPath = "/proc/meminfo";        String readTemp = "";        String memTotal = "";        long memory = 0;        try {            FileReader fr = new FileReader(memInfoPath);            BufferedReader localBufferedReader = new BufferedReader(fr, 8192);            while ((readTemp = localBufferedReader.readLine()) != null) {                if (readTemp.contains("MemTotal")) {                    String[] total = readTemp.split(":");                    memTotal = total[1].trim();                }            }            localBufferedReader.close();            String[] memKb = memTotal.split(" ");            memTotal = memKb[0].trim();            Log.d(LOG_TAG, "memTotal: " + memTotal);            memory = Long.parseLong(memTotal);        } catch (IOException e) {            Log.e(LOG_TAG, "IOException: " + e.getMessage());        }        return memory;    }public long getFreeMemorySize(Context context) {        ActivityManager.MemoryInfo outInfo = new ActivityManager.MemoryInfo();        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        am.getMemoryInfo(outInfo);        long avaliMem = outInfo.availMem;        return avaliMem / 1024;    }public int getPidMemorySize(int pid, Context context) {        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        int[] myMempid = new int[] { pid };        Debug.MemoryInfo[] memoryInfo = am.getProcessMemoryInfo(myMempid);        memoryInfo[0].getTotalSharedDirty();        int memSize = memoryInfo[0].getTotalPss();        return memSize;}

CPU

同样的，通过通过读取文件”/proc/cpuinfo”和”/proc/pid/stat”的信息能够获取手机Cpu的总量,pid应用占用率

获取总cpu和pid应用cpu

public void readCpu(int pid) {        String processPid = Integer.toString(pid);        String cpuStatPath = "/proc/" + processPid + "/stat";        try {            // monitor cpu stat of certain process                RandomAccessFile processCpuInfo = new RandomAccessFile(cpuStatPath , "r");            String line = "";            StringBuffer stringBuffer = new StringBuffer();            stringBuffer.setLength(0);            while ((line = processCpuInfo.readLine()) != null) {                stringBuffer.append(line + "\n");            }            String[] tok = stringBuffer.toString().split(" ");            processCpu = Long.parseLong(tok[13]) + Long.parseLong(tok[14]);            processCpuInfo.close();        } catch (FileNotFoundException e) {            Log.w(LOG_TAG, "FileNotFoundException: " + e.getMessage());        } catch (IOException e) {            e.printStackTrace();        }        try {            // monitor total and idle cpu stat of certain process            RandomAccessFile cpuInfo = new RandomAccessFile("/proc/cpuinfo", "r");            String line = "";            while ((null != (line = cpuInfo.readLine())) && line.startsWith("cpu")) {                String[] toks = line.split("\\s+");                idleCpu.add(Long.parseLong(toks[4]));                totalCpu.add(Long.parseLong(toks[1]) + Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])                        + Long.parseLong(toks[6]) + Long.parseLong(toks[5]) + Long.parseLong(toks[7]));            }            cpuInfo.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }}

0 0