app专项性能测试——获取手机cpu、内存、流量

1、Cpu获取

了解过腾讯GT工具的源码，他们用的是通过读取/proc/stat的数据，将每一个核的cpu使用跟闲置数据提取。使用率永远是增量式计算。计算方法为100*（cpu忙时增量-cpu整体增量），从计算方法来看，可能会导致负数出现。 getProcessCpuUsage：计算进程的CPU使用率，主要通过"/proc/" + pid + "/stat"来计算，在这里回京过一系列计算，拿到进程的CPU时间片。这样的方式比较麻烦，但是兼容性可能会好一些。下面方法是直接adb shell top -n来找到应用的top信息，直接取cpu那一列的数

// 获取手机指定packagename的cpu占比
    public static String getCPU(String PackageName) {

        String Cpu = null;
        try {

            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec("adb shell top -n 1| grep " + PackageName);
            try {
                if (proc.waitFor() != 0) {
                    System.err.println("exit value = " + proc.exitValue());
                }
                BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
                StringBuffer stringBuffer = new StringBuffer();
                String line = null;
                while ((line = in.readLine()) != null) {
                    stringBuffer.append(line + " ");

                }

                String str1 = stringBuffer.toString();
//                System.out.println("返回是#####"+str1);
                // 以空格区分正则
                String[] toks = str1.split(" +");
/// /            String str2 = str1.substring(str1.indexOf(" " + PackageName) - 46, str1.indexOf(" " + PackageName));
                Cpu = toks[4];
//                System.out.println("当前进程的cpu占用是*** " + Cpu );

            } catch (InterruptedException e) {
                System.err.println(e);
            } finally {
                try {
                    proc.destroy();
                } catch (Exception e2) {
                }
            }
        } catch (Exception StringIndexOutOfBoundsException) {

            System.out.println("请检查设备是否连接");

        }

        return Cpu;

    }

2、内存获取

adb shell dumpsys meminfo|grep packagename

public static double getMemory(String PackageName) {

        double Heap = 0;

        try {
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec("adb shell dumpsys meminfo|grep " + PackageName);
            try {
                if (proc.waitFor() != 0) {
                    System.err.println("exit value = " + proc.exitValue());
                }
                BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
                StringBuffer stringBuffer = new StringBuffer();
                String line = null;
                while ((line = in.readLine()) != null) {
                    stringBuffer.append(line + " ");

                }

                String str1 = stringBuffer.toString();
                String str2 = str1.substring(str1.indexOf(": "+PackageName) - 12, str1.indexOf(": "+PackageName)).trim();
                String str3 = str2.substring(0, str2.indexOf("K"));
                str3 = str3.trim().replace(",","");
                Heap = Double.parseDouble(str3) / 1024;
                DecimalFormat df = new DecimalFormat("#.000");
                String memory = df.format(Heap);
                Heap = Double.parseDouble(memory);
                System.out.println(Heap + "MB");
            } catch (InterruptedException e) {
                System.err.println(e);
            } finally {
                try {
                    proc.destroy();
                } catch (Exception e2) {
                }
            }
        }

        catch (Exception StringIndexOutOfBoundsException) {
            System.out.print("请检查设备是否连接");

        }
        return Heap;
    }

3、获取流量

通过看 /proc/$pid/net/dev，查看应用流量使用情况。wlan0： 一行显示了接受、发送流量的字节数，把两个相加就是app累计消耗的流量（bytes），除以1024得到kbps。打开手机飞行模式、会使该数据清零。

下面通过时间查计算流量，两次获取流量除以时间（下面用的是1秒，所以得到的每秒消耗流量 kbps/s）

public static double getFlowAction(String PackageName) {
        double flowAction = 0;
        try {

            String Pid = PID(PackageName);

            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec("adb shell cat /proc/" + Pid + "/net/dev");
            try {
                if (proc.waitFor() != 0) {
                    System.err.println("exit value = " + proc.exitValue());
                }
                BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
                StringBuffer stringBuffer = new StringBuffer();
                String line = null;
                while ((line = in.readLine()) != null) {
                    stringBuffer.append(line + " ");

                }
                String str1 = stringBuffer.toString();
                String str2 = str1.substring(str1.indexOf("wlan0:"), str1.indexOf("wlan0:") + 100);
//                System.out.println("先获取的句子  " + str2);
//              空格分成字符串数组取第2个，第10个数，分别是发送流量和接受流量
                String[] toks = str2.split(" +");
                String str4 = toks[1];
                String str6 = toks[9];
                int b = Integer.parseInt(str4);
                int a = Integer.parseInt(str6);

                double sendFlow = a / 1024 ;
                double revFlow = b / 1024 ;
                flowAction = sendFlow + revFlow;
                System.out.println("当前应用使用流量为： " + flowAction + "Kbps");
            } catch (InterruptedException e) {
                System.err.println(e);
            } finally {
                try {
                    proc.destroy();
                } catch (Exception e2) {
                }
            }
        } catch (Exception StringIndexOutOfBoundsException) {
            System.out.println("请检查设备是否连接");

        }

        return flowAction;
    }

    public static double getFlow() {
        double flow = 0;
        double flowbefore = 0;
        double flowafter = 0;
        flowbefore = getFlowAction("com.umetrip.android.msky.app");
        try {
            sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        flowafter = getFlowAction("com.umetrip.android.msky.app");
        flow = flowafter - flowbefore;
        return flow;
    }