Selasa, 17 Maret 2015

Get number of available cores and cpu info

The method Runtime.availableProcessors() returns the number of processor cores available to the VM.

And the /proc/cpuinfo hold infoprmation about the CPU, you can read it as text file.



Example:
package com.example.androidcpuinfo;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

TextView cores, cpuinfo;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cores = (TextView)findViewById(R.id.cores);
cpuinfo = (TextView)findViewById(R.id.cpuinfo);

Runtime runtime = Runtime.getRuntime();
int availableProcessors = runtime.availableProcessors();
cores.setText("You have " + availableProcessors + " availableProcessors");

//Read text file "/proc/cpuinfo"
String file_cpuinfo = "/proc/cpuinfo";
String info = "";
try {
FileReader fileReader = new FileReader(file_cpuinfo);
BufferedReader bufferReader = new BufferedReader(fileReader);

String line;
try {
while((line = bufferReader.readLine()) != null)
{
info += line + "\n";
}
cpuinfo.setText(info);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.androidcpuinfo.MainActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="android-coding.blogspot.com"
android:textSize="24dp"
android:textStyle="bold" />

<TextView
android:id="@+id/cores"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20dp"
android:textStyle="italic" />

<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >

<TextView
android:id="@+id/cpuinfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</ScrollView>

</LinearLayout>

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