1、Cpu獲取

瞭解過騰訊GT工具的原始碼，他們用的是通過讀取/proc/stat的資料，將每一個核的cpu使用跟閒置資料提取。使用率永遠是增量式計算。計算方法為100*（cpu忙時增量-cpu整體增量），從計算方法來看，可能會導致負數出現。 getProcessCpuUsage：計算程序的CPU使用率，主要通過"/proc/" + pid + "/stat"來計算，在這裡回京過一系列計算，拿到程序的CPU時間片。這樣的方式比較麻煩，但是相容性可能會好一些。下面方法是直接adb shell top -n來找到應用的top資訊，直接取cpu那一列的數

// 獲取手機指定packagename的cpu佔比
    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);
                // 以空格區分正則
                String[] toks = str1.split(" +");
/// /            String str2 = str1.substring(str1.indexOf(" " + PackageName) - 46, str1.indexOf(" " + PackageName));
                Cpu = toks[4];
//                System.out.println("當前程序的cpu佔用是*** " + Cpu );

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

            System.out.println("請檢查裝置是否連線");

        }

        return Cpu;

    }
 

2、記憶體獲取

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("請檢查裝置是否連線");

        }
        return Heap;
    }
 

3、獲取流量

通過看 /proc/$pid/net/dev，檢視應用流量使用情況。wlan0： 一行顯示了接受、傳送流量的位元組數，把兩個相加就是app累計消耗的流量（bytes），除以1024得到kbps。開啟手機飛航模式、會使該資料清零。

下面通過時間查計算流量，兩次獲取流量除以時間（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("先獲取的句子  " + str2);
//              空格分成字串陣列取第2個，第10個數，分別是傳送流量和接受流量
                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("當前應用使用流量為： " + flowAction + "Kbps");
            } catch (InterruptedException e) {
                System.err.println(e);
            } finally {
                try {
                    proc.destroy();
                } catch (Exception e2) {
                }
            }
        } catch (Exception StringIndexOutOfBoundsException) {
            System.out.println("請檢查裝置是否連線");

        }

        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;
    }