How to get Memory usage and CPU usage in android?

Question

Hello !

Is there any API by which we can get CPU or Memory usage of android?

I have tried one code as below:

Please look into it and let me know if this is the correct way?

package com.infostretch.mainactivity;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;


public class CPULoad 
{
    long total = 0;
    long idle = 0;


float usage = 0;

public CPULoad( )
{
    readUsage( );
}

public float getUsage( )
{
    readUsage( );
    return usage;
}

private void readUsage( )
{
    try
    {
        BufferedReader reader = new BufferedReader( new InputStreamReader( new FileInputStream( "/proc/stat" ) ), 1000 );
        String load = reader.readLine();
        reader.close();     

        String[] toks = load.split(" ");

        long currTotal = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]);
        long currIdle = Long.parseLong(toks[5]);

        this.usage = (currTotal - total) * 100.0f / (currTotal - total + currIdle - idle);
        this.total = currTotal;
        this.idle = currIdle;
    }
    catch( IOException ex )
    {
        ex.printStackTrace();           
    }
}
}

I will be very thankful for your anykind of help.

Answer 1

Check the Debug class. http://developer.android.com/reference/android/os/Debug.html i.e. Debug.getNativeHeapAllocatedSize()

It has methods to get the used native heap, which is i.e. used by external bitmaps in your app. For the heap that the app is using internally, you can see that in the DDMS tool that comes with the Android SDK and is also available via Eclipse.

The native heap + the heap as indicated in the DDMS make up the total heap that your app is allocating.

For CPU usage I'm not sure if there's anything available via API/SDK.