如何从Android设备的具体信息＆QUOT;的/ proc内/ cpuinfo＆QUOT; flie？

问题描述：

我如何分析我的Android平板电脑的/ proc内/ cpuinfo文件，以获得处理器的核心时钟频率和信息？
我不需要上述文件，但他们中的两个信息提供的所有信息。
如果有人请帮助？

How can I parse "/proc/cpuinfo" file of my Android tablet to get information of the Processor's Core and ClockSpeed? I don’t need all information provided by the above file but two information of them. If someone please help?

答

我希望这不是为时已晚，一个答案，但，这是我如何获得当前的频率为特定的CPU核心：

I hope its not too late for an answer but, this is how i get the current frequency for a specific cpu core:

public class MainActivity extends Activity{

private static final int INSERTION_POINT = 27;

private static String getCurFrequencyFilePath(int whichCpuCore){
    StringBuilder filePath = new StringBuilder("/sys/devices/system/cpu/cpu/cpufreq/scaling_cur_freq");
    filePath.insert(INSERTION_POINT, whichCpuCore);
    return filePath.toString();
 }

public static int getCurrentFrequency(int whichCpuCore){

     int curFrequency = -1;
     String cpuCoreCurFreqFilePath = getCurFrequencyFilePath(whichCpuCore);

     if(new File(cpuCoreCurFreqFilePath).exists()){

         try {
                BufferedReader br = new BufferedReader(new FileReader(new File(cpuCoreCurFreqFilePath)));
                String aLine;
                while ((aLine = br.readLine()) != null) {

                    try{
                        curFrequency = Integer.parseInt(aLine);
                    }
                    catch(NumberFormatException e){

                        Log.e(getPackageName(), e.toString());
                    }

                }
                if (br != null) {
                    br.close();
                }
        } 
        catch (IOException e) {
            Log.e(getPackageName(), e.toString());
        }

     }

     return curFrequency;
 }

}

从这里的一块蛋糕，你只需调用方法:-D

From here its a piece of cake, you simply call the method :-D

int core1CurrentFreq = getCurrentFrequency(1, this);

有时芯脱机，在这种情况下，该文件的路径将不存在和将返回-1

Sometimes the cores go offline, in which case the file path will not exist and -1 will be returned

注：的。返回的值是千赫

MHz的值是core1CurrentFreq / 1E3

GHz的值是core1CurrentFreq / 1e6个电子

NOTE. the returned value is in KHz
MHz value is core1CurrentFreq / 1e3
GHz value is core1CurrentFreq / 1e6

在getCurFrequencyFilePath（）方法的一些解释相关，因为它是不是所有的清晰。

Some explainations on the getCurFrequencyFilePath() method since it is not all that clear.

电流频率通常存储在文件：scaling_cur_freq

Current frequency is usually stored in the file: scaling_cur_freq

该文件路径是：

"/sys/devices/system/cpu/cpu(XX)/cpufreq/scaling_cur_freq"

在哪里（XX）替换为CPU内核数例如：

where (XX) is substituted for the cpu core number eg:

"/sys/devices/system/cpu/cpu2/cpufreq/scaling_cur_freq"

该INSERTION_POINT变量无非是在我们希望将对应的CPU核心数（XX），该点的指数更加

The INSERTION_POINT variable is nothing more than the index of (XX), the point at which we want to place the number corresponding to the cpu core

我建议你看看一些在CPU频率文件夹，可以使用它们的其他文件，以获得像最大和最小频率，可获取的频率等。

I suggest you take a look at some of the other files in the cpufreq folder, you can use them to get other information like maximum and minimum frequency, list of availables frequencies etc.

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如何从Android设备的具体信息＆QUOT;的/ proc内/ cpuinfo＆QUOT; flie？

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