How to get information about GPU using Xamarin Android?

Bartłomiej Wojdyna 21 Reputation points
2021-02-24T23:56:59.957+00:00

Is any posibility to get information about GPU vendor, model or renderer in Xamarin Android ?

Xamarin
Xamarin
A Microsoft open-source app platform for building Android and iOS apps with .NET and C#.
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Accepted answer
  1. Leon Lu (Shanghai Wicresoft Co,.Ltd.) 71,931 Reputation points Microsoft Vendor
    2021-02-25T06:25:06.907+00:00

    Hello,​

    Welcome to our Microsoft Q&A platform!

    You can use OpenGL to get GPU information in Xamarin Android(Note: please run following code to android device).

    Firstly, we can write a class to implement GLSurfaceView.IRenderer like following code. We can get GPU information in the OnSurfaceCreated method.

       class MySurface : Java.Lang.Object, GLSurfaceView.IRenderer  
           {  
               private TextView tvVendor;  
               RelativeLayout rlRoot;  
               GLSurfaceView mGlSurfaceView;  
               public MySurface(TextView tvVendor, RelativeLayout rlRoot, GLSurfaceView mGlSurfaceView)  
               {  
                   this.tvVendor = tvVendor;  
                   this.rlRoot = rlRoot;  
                   this.mGlSurfaceView = mGlSurfaceView;  
               }  
         
               public void OnDrawFrame(IGL10 gl)  
               {  
                    
                    
                   gl.GlClear(GL10.GlColorBufferBit);  
               }  
         
               public void OnSurfaceChanged(IGL10 gl, int width, int height)  
               {  
                   
         
                   
               }  
         
               public void OnSurfaceCreated(IGL10 gl, Javax.Microedition.Khronos.Egl.EGLConfig config)  
               {  
                   string extensions = GLES20.GlGetString(GLES20.GlExtensions);  
                   var red = gl.GlGetString(GL10.GlRenderer);  
                   string GPUInfo = "gl renderer: " + gl.GlGetString(GL10.GlRenderer) + "\n gl vendor: " + gl.GlGetString(GL10.GlVendor);  
         
                   MainThread.BeginInvokeOnMainThread(() => {            
                       tvVendor.Text = GPUInfo;  
                       rlRoot.RemoveView(mGlSurfaceView);  
                   });  
               }  
           }  
    

    Then I test it in the OnCreate method of MainActivity.cs, we can show the GPU vendor, model or renderer in the textview, If you do not need to do that, you can store the GPU information to the sharedpreferences.

       public class MainActivity : AppCompatActivity  
           {  
               TextView tvVendor;  
               RelativeLayout rlRoot;  
               GLSurfaceView mGlSurfaceView;  
               protected override void OnCreate(Bundle savedInstanceState)  
               {  
                   base.OnCreate(savedInstanceState);  
                   Xamarin.Essentials.Platform.Init(this, savedInstanceState);  
                   // Set our view from the "main" layout resource  
                   SetContentView(Resource.Layout.activity_main);  
         
         
                   rlRoot = (RelativeLayout)FindViewById(Resource.Id.rlRoot);  
                   tvVendor = (TextView)FindViewById(Resource.Id.tvVendor);  
         
                    mGlSurfaceView = new GLSurfaceView(this);  
                    
                   mGlSurfaceView.SetEGLContextClientVersion(3);  
                   mGlSurfaceView.SetEGLConfigChooser(8, 8, 8, 8, 0, 0);  
         
                   mGlSurfaceView.SetRenderer(new MySurface(tvVendor, rlRoot, mGlSurfaceView));  
                    
                  rlRoot.AddView(mGlSurfaceView);  
         
                   
               }  
               public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)  
               {  
                   Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
         
                   base.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
               }  
         
           }  
    

    Here is activity_main.xml

       <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
           xmlns:app="http://schemas.android.com/apk/res-auto"  
           xmlns:tools="http://schemas.android.com/tools"  
           android:id="@+id/rlRoot"  
           android:layout_width="match_parent"  
           android:layout_height="match_parent">  
         
           <TextView   
           android:id="@+id/tvVendor"  
           android:layout_width="wrap_content"  
           android:layout_height="wrap_content"  
           android:textColor="#FF0000"  
               android:text="test"  
           />  
       </RelativeLayout>  
    

    ======================
    Updated==============================

    need informaction about CPU like name, number of core or frequency...

    You can read "/system/bin/cat", "/proc/cpuinfo" path to get CPU information, please use following code.

       using Android.App;  
       using Android.OS;  
       using Android.Support.V7.App;  
       using Android.Runtime;  
       using Android.Widget;  
       using Java.Lang;  
       using Java.IO;  
       using System.IO;  
       using System.Text;  
         
       namespace App55  
       {  
           [Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]  
           public class MainActivity : AppCompatActivity  
           {  
               ProcessBuilder processBuilder;  
              
               string[] DATA = { "/system/bin/cat", "/proc/cpuinfo" };  
              
               Java.Lang.Process process;  
             
               protected override void OnCreate(Bundle savedInstanceState)  
               {  
                   base.OnCreate(savedInstanceState);  
                   Xamarin.Essentials.Platform.Init(this, savedInstanceState);  
                   // Set our view from the "main" layout resource  
                   SetContentView(Resource.Layout.activity_main);  
                   TextView textView1 = FindViewById<TextView>(Resource.Id.textView1);  
                   
                   string value;  
                   try  
                   {  
                       processBuilder = new ProcessBuilder(DATA);  
         
                       process = processBuilder.Start();  
         
                       Stream  inputStream = process.InputStream;  
         
                       using (var reader = new StreamReader(inputStream, Encoding.UTF8))  
                       {  
                            value = reader.ReadToEnd();  
                           
                       }  
         
                       textView1.Text = value;  
                   }  
                   catch (Java.IO.IOException ex)  
                   {  
         
                       ex.PrintStackTrace();  
                   }  
         
                    
               }  
    

    Best Regards,

    Leon Lu


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