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Google Map Screenshot black

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-1

I want to take google map screenshot in my xamarin PCL Project. The map is displaying perfectly. But when i try to take screenshot it is displaying black screen of the google map part.

But when i try to take by code screenshot is displaying like below.

public interface IScreenshotService

 Task<byte[]> Capture();



public class ScreenshotService : IScreenshotService

 public static Activity Activity get; set; 

 //public void SetActivity(Activity activity) => _currentActivity = activity 

 public async System.Threading.Tasks.Task<byte[]> Capture()
 
 if (Activity == null)
 
 throw new Exception("You have to set ScreenshotManager.Activity in your Android project");
 

 var view = Activity.Window.DecorView;
 view.DrawingCacheEnabled = true;

 Bitmap bitmap = view.GetDrawingCache(true);

 byte[] bitmapData;

 using (var stream = new MemoryStream())
 
 bitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
 bitmapData = stream.ToArray();
 

 return bitmapData;
 

Code to for calling function

byte[] screenshotData = await DependencyService.Get<IScreenshotService>().Capture();

can you help me to figure out the issue?

c# google-maps xamarin.forms

share|improve this question

edited Mar 4 at 10:17

A.Goutam

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Try : Call this view.BuildDrawingCache(); after GetDrawingCache and then put some delay before capturing screen.
  
  – Gaurang Dave
  Feb 25 at 6:17
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @GaurangDave is this will be find Bitmap bitmap = view.GetDrawingCache(true); view.BuildDrawingCache(); await Task.Delay(1000);
  
  – A.Goutam
  Feb 25 at 6:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  view.DrawingCacheEnabled = true;view.BuildDrawingCache(); await Task.Delay(1000); Bitmap bitmap = view.GetDrawingCache(true); I suggest this but I would request you to try these statement in different sequence as I can not code it right now.
  
  – Gaurang Dave
  Feb 25 at 6:28
  

  
  
  
  

add a comment | 

-1

I want to take google map screenshot in my xamarin PCL Project. The map is displaying perfectly. But when i try to take screenshot it is displaying black screen of the google map part.

But when i try to take by code screenshot is displaying like below.

public interface IScreenshotService

 Task<byte[]> Capture();



public class ScreenshotService : IScreenshotService

 public static Activity Activity get; set; 

 //public void SetActivity(Activity activity) => _currentActivity = activity 

 public async System.Threading.Tasks.Task<byte[]> Capture()
 
 if (Activity == null)
 
 throw new Exception("You have to set ScreenshotManager.Activity in your Android project");
 

 var view = Activity.Window.DecorView;
 view.DrawingCacheEnabled = true;

 Bitmap bitmap = view.GetDrawingCache(true);

 byte[] bitmapData;

 using (var stream = new MemoryStream())
 
 bitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
 bitmapData = stream.ToArray();
 

 return bitmapData;
 

Code to for calling function

byte[] screenshotData = await DependencyService.Get<IScreenshotService>().Capture();

can you help me to figure out the issue?

c# google-maps xamarin.forms

share|improve this question

edited Mar 4 at 10:17

A.Goutam

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Try : Call this view.BuildDrawingCache(); after GetDrawingCache and then put some delay before capturing screen.
  
  – Gaurang Dave
  Feb 25 at 6:17
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @GaurangDave is this will be find Bitmap bitmap = view.GetDrawingCache(true); view.BuildDrawingCache(); await Task.Delay(1000);
  
  – A.Goutam
  Feb 25 at 6:24
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  view.DrawingCacheEnabled = true;view.BuildDrawingCache(); await Task.Delay(1000); Bitmap bitmap = view.GetDrawingCache(true); I suggest this but I would request you to try these statement in different sequence as I can not code it right now.
  
  – Gaurang Dave
  Feb 25 at 6:28
  

  
  
  
  

add a comment | 

I want to take google map screenshot in my xamarin PCL Project. The map is displaying perfectly. But when i try to take screenshot it is displaying black screen of the google map part.

But when i try to take by code screenshot is displaying like below.

public interface IScreenshotService

 Task<byte[]> Capture();



public class ScreenshotService : IScreenshotService

 public static Activity Activity get; set; 

 //public void SetActivity(Activity activity) => _currentActivity = activity 

 public async System.Threading.Tasks.Task<byte[]> Capture()
 
 if (Activity == null)
 
 throw new Exception("You have to set ScreenshotManager.Activity in your Android project");
 

 var view = Activity.Window.DecorView;
 view.DrawingCacheEnabled = true;

 Bitmap bitmap = view.GetDrawingCache(true);

 byte[] bitmapData;

 using (var stream = new MemoryStream())
 
 bitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
 bitmapData = stream.ToArray();
 

 return bitmapData;
 

Code to for calling function

byte[] screenshotData = await DependencyService.Get<IScreenshotService>().Capture();

can you help me to figure out the issue?

c# google-maps xamarin.forms

share|improve this question

edited Mar 4 at 10:17

A.Goutam

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

public interface IScreenshotService

 Task<byte[]> Capture();



public class ScreenshotService : IScreenshotService

 public static Activity Activity get; set; 

 //public void SetActivity(Activity activity) => _currentActivity = activity 

 public async System.Threading.Tasks.Task<byte[]> Capture()
 
 if (Activity == null)
 
 throw new Exception("You have to set ScreenshotManager.Activity in your Android project");
 

 var view = Activity.Window.DecorView;
 view.DrawingCacheEnabled = true;

 Bitmap bitmap = view.GetDrawingCache(true);

 byte[] bitmapData;

 using (var stream = new MemoryStream())
 
 bitmap.Compress(Bitmap.CompressFormat.Png, 0, stream);
 bitmapData = stream.ToArray();
 

 return bitmapData;
 

byte[] screenshotData = await DependencyService.Get<IScreenshotService>().Capture();

share|improve this question

edited Mar 4 at 10:17

A.Goutam

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

share|improve this question

edited Mar 4 at 10:17

A.Goutam

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

asked Feb 25 at 6:08

A.GoutamA.Goutam

1,77242651

2 Answers
2

active

oldest

votes

0

I think it might be Images of the map must not be transmitted to your servers, or otherwise used outside of the application
and you could use GoogleMap.snapshot method to take snapshots of the map

simply implement the following interface: onSnapshotReady

public abstract void onSnapshotReady (Bitmap snapshot)

and call:snapshot

public final void snapshot (GoogleMap.SnapshotReadyCallback callback)

you alse could refer to the example (in jave) :screenshot answer

share|improve this answer

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your comments but i want to do this in Xamarin Forms Application
  
  – A.Goutam
  Feb 26 at 5:53
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i know .i mean you use DependencyService to call the ScreenshotService ,then you could write the code in Droid (only conversion from java to C# ,refer to the document and link)
  
  – Leo Zhu - MSFT
  Feb 26 at 5:59
  

  
  
  
  

add a comment | 

0

This might be because what you are doing is against the Terms of Service of Google Maps Platform, according to the article:

3.2.4a "No Scraping. Customer will not extract, export, scrape, or cache Google Maps Content for use outside the Services."

You may visit Google Maps Platform Terms of Service to learn more about Licensing.

share|improve this answer

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your reply but i can take screen shot from different Screen shot app for the same screen
  
  – A.Goutam
  Feb 27 at 7:43
  

  
  
  
  

add a comment | 

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0

I think it might be Images of the map must not be transmitted to your servers, or otherwise used outside of the application
and you could use GoogleMap.snapshot method to take snapshots of the map

simply implement the following interface: onSnapshotReady

public abstract void onSnapshotReady (Bitmap snapshot)

and call:snapshot

public final void snapshot (GoogleMap.SnapshotReadyCallback callback)

you alse could refer to the example (in jave) :screenshot answer

share|improve this answer

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your comments but i want to do this in Xamarin Forms Application
  
  – A.Goutam
  Feb 26 at 5:53
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i know .i mean you use DependencyService to call the ScreenshotService ,then you could write the code in Droid (only conversion from java to C# ,refer to the document and link)
  
  – Leo Zhu - MSFT
  Feb 26 at 5:59
  

  
  
  
  

add a comment | 

0

I think it might be Images of the map must not be transmitted to your servers, or otherwise used outside of the application
and you could use GoogleMap.snapshot method to take snapshots of the map

simply implement the following interface: onSnapshotReady

public abstract void onSnapshotReady (Bitmap snapshot)

and call:snapshot

public final void snapshot (GoogleMap.SnapshotReadyCallback callback)

you alse could refer to the example (in jave) :screenshot answer

share|improve this answer

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your comments but i want to do this in Xamarin Forms Application
  
  – A.Goutam
  Feb 26 at 5:53
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  i know .i mean you use DependencyService to call the ScreenshotService ,then you could write the code in Droid (only conversion from java to C# ,refer to the document and link)
  
  – Leo Zhu - MSFT
  Feb 26 at 5:59
  

  
  
  
  

add a comment | 

I think it might be Images of the map must not be transmitted to your servers, or otherwise used outside of the application
and you could use GoogleMap.snapshot method to take snapshots of the map

simply implement the following interface: onSnapshotReady

public abstract void onSnapshotReady (Bitmap snapshot)

and call:snapshot

public final void snapshot (GoogleMap.SnapshotReadyCallback callback)

you alse could refer to the example (in jave) :screenshot answer

share|improve this answer

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

public abstract void onSnapshotReady (Bitmap snapshot)

public final void snapshot (GoogleMap.SnapshotReadyCallback callback)

share|improve this answer

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

answered Feb 26 at 2:19

Leo Zhu - MSFTLeo Zhu - MSFT

1,086118

0

This might be because what you are doing is against the Terms of Service of Google Maps Platform, according to the article:

3.2.4a "No Scraping. Customer will not extract, export, scrape, or cache Google Maps Content for use outside the Services."

You may visit Google Maps Platform Terms of Service to learn more about Licensing.

share|improve this answer

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your reply but i can take screen shot from different Screen shot app for the same screen
  
  – A.Goutam
  Feb 27 at 7:43
  

  
  
  
  

add a comment | 

0

This might be because what you are doing is against the Terms of Service of Google Maps Platform, according to the article:

3.2.4a "No Scraping. Customer will not extract, export, scrape, or cache Google Maps Content for use outside the Services."

You may visit Google Maps Platform Terms of Service to learn more about Licensing.

share|improve this answer

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for your reply but i can take screen shot from different Screen shot app for the same screen
  
  – A.Goutam
  Feb 27 at 7:43
  

  
  
  
  

add a comment | 

This might be because what you are doing is against the Terms of Service of Google Maps Platform, according to the article:

3.2.4a "No Scraping. Customer will not extract, export, scrape, or cache Google Maps Content for use outside the Services."

You may visit Google Maps Platform Terms of Service to learn more about Licensing.

share|improve this answer

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

share|improve this answer

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110

answered Feb 27 at 7:33

Shawn DomingoShawn Domingo

388110