Python获取android设备cpu和内存占用情况

获取android设备的CPU和内存占用情况可以通过连接设备并执行adb命令来实现。本文将介绍如何使用Python来获取设备的CPU和内存使用情况。

确认ADB环境是否配置好

在使用Python前，需要先确认ADB环境是否正确配置。可执行以下命令检查是否能够正确调用ADB：

adb devices

若成功输出设备信息，则环境配置正确，可以开始使用Python接收数据。

Python代码实现

下面是一个完整的Python程序，可获取设备的CPU和内存占用情况。

import subprocess
import re

def get_cpu_usage():
    output = subprocess.check_output(["adb", "shell", "dumpsys", "cpuinfo"])
    output_str = output.decode("utf-8")

    pattern = re.compile(r"\s+(\d{1,3})%.*\s+(\S+)$")

    usage_total = 0
    usage_count = 0

    for line in output_str.splitlines():
        match = pattern.match(line)
        if match:
            usage_total += int(match.group(1))
            usage_count += 1

    return usage_total / usage_count if usage_count > 0 else 0

def get_mem_usage():
    output = subprocess.check_output(["adb", "shell", "cat", "/proc/meminfo"])
    output_str = output.decode("utf-8")

    mem_total = 0
    mem_free = 0
    mem_buffers = 0

    for line in output_str.splitlines():
        if "MemTotal" in line:
            mem_total = int(re.findall(r'\d+', line)[0])
        elif "MemFree" in line:
            mem_free = int(re.findall(r'\d+', line)[0])
        elif "Buffers" in line:
            mem_buffers = int(re.findall(r'\d+', line)[0])

    return (mem_total - mem_free - mem_buffers) / mem_total * 100

if __name__ == "__main__":
    print("CPU usage:", round(get_cpu_usage(), 2), "%")
    print("Memory usage:", round(get_mem_usage(), 2), "%")

上面的代码包含了 get_cpu_usage() 和 get_mem_usage() 两个函数，分别用于获取设备的CPU和内存占用情况。这些函数使用 subprocess.check_output() 函数调用ADB命令并获取输出结果，然后使用正则表达式匹配并提取有用信息。

这里使用的正则表达式是：

• 获取CPU占用率

pattern = re.compile(r"\s+(\d{1,3})%.*\s+(\S+)$")

• 获取内存占用率

使用的是三个不同的正则表达式，根据不同的关键字进行匹配提取.

if "MemTotal" in line:
    mem_total = int(re.findall(r'\d+', line)[0])
elif "MemFree" in line:
    mem_free = int(re.findall(r'\d+', line)[0])
elif "Buffers" in line:
    mem_buffers = int(re.findall(r'\d+', line)[0])

示例

下面两个示例展示了如何在Python中获取设备的CPU和内存占用情况。

1. 获取设备的CPU占用率

import subprocess
import re

def get_cpu_usage():
    output = subprocess.check_output(["adb", "shell", "dumpsys", "cpuinfo"])
    output_str = output.decode("utf-8")

    pattern = re.compile(r"\s+(\d{1,3})%.*\s+(\S+)$")

    usage_total = 0
    usage_count = 0

    for line in output_str.splitlines():
        match = pattern.match(line)
        if match:
            usage_total += int(match.group(1))
            usage_count += 1

    return usage_total / usage_count if usage_count > 0 else 0

if __name__ == "__main__":
    print("CPU usage:", round(get_cpu_usage(), 2), "%")

输出结果样例：

CPU usage: 32.91 %

1. 获取设备的内存占用率

import subprocess
import re

def get_mem_usage():
    output = subprocess.check_output(["adb", "shell", "cat", "/proc/meminfo"])
    output_str = output.decode("utf-8")

    mem_total = 0
    mem_free = 0
    mem_buffers = 0

    for line in output_str.splitlines():
        if "MemTotal" in line:
            mem_total = int(re.findall(r'\d+', line)[0])
        elif "MemFree" in line:
            mem_free = int(re.findall(r'\d+', line)[0])
        elif "Buffers" in line:
            mem_buffers = int(re.findall(r'\d+', line)[0])

    return (mem_total - mem_free - mem_buffers) / mem_total * 100

if __name__ == "__main__":
    print("Memory usage:", round(get_mem_usage(), 2), "%")

输出结果样例：

Memory usage: 34.19 %

总之，这里提供了一种使用Python获取android设备CPU和内存占用信息的完整攻略。以上示例仅仅是获取CPU和内存占用情况，可以通过类似的方法获取其他系统性能信息，比如温度、电量等信息。