안드로이드 이미지 썸네일 참고

http://blog.naver.com/skcjs84?Redirect=Log&logNo=90089483420

http://stackoverflow.com/questions/3107527/android-save-view-to-jpg-or-png

밑의 예제는 null포인터 오류남..쓰불..도저히 모르겠다..

would like to write an android app that basically layers an overlay on image on another image and then I would like to save the picture with the overlay as a jpg or png. Basically this will be the whole view that I would like to save. Sample code would be very helpful. EDIT: I tried out your suggestions and am getting a null pointer at the Starred Line.  import java.io.File;  import java.io.FileNotFoundException;  import java.io.FileOutputStream;    import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.Bitmap.CompressFormat;  import android.os.Bundle;  import android.os.Environment;  import android.widget.LinearLayout;  import android.widget.TextView;        public class EditPhoto extends Activity {          /** Called when the activity is first created. */       LinearLayout ll = null;       TextView tv = null;          @Override          public void onCreate(Bundle savedInstanceState) {              super.onCreate(savedInstanceState);              setContentView(R.layout.main);              tv = (TextView) findViewById(R.id.text);              ll = (LinearLayout) findViewById(R.id.layout);              ll.setDrawingCacheEnabled(true);              Bitmap b = ll.getDrawingCache();              File sdCard = Environment.getExternalStorageDirectory();              File file = new File(sdCard, "image.jpg");              FileOutputStream fos;        try {         fos = new FileOutputStream(file);         *** b.compress(CompressFormat.JPEG, 95,fos);        } catch (FileNotFoundException e) {         // TODO Auto-generated catch block         e.printStackTrace();        }            }      }  android camera pictures link|flag edited Aug 23 at 21:31 asked Jun 24 at 5:56 dweebsonduty 12110 53% accept rate

Nothing on this? I know it is possible, I have seen it done in other apps. – dweebsonduty Jun 25 at 4:41 Can you give us some code describing how you are doing the editing? – Chris Thompson Aug 19 at 20:36 Its more of an idea right now, but I will just have an imageview overlayed over the photo imageview. Unless there is a better way to do it. – dweebsonduty Aug 19 at 20:38 Are you wanting to save the image with the layers (ala PSD) or just as a flat image (ala png)? – Chris Thompson Aug 19 at 20:59 One flat png or jpg would be fine. – dweebsonduty Aug 19 at 22:31

2 Answers

oldest newest votes

up vote 1 down vote accepted +150

You can take advantage of a View's drawing cache. view.setDrawingCacheEnabled(true);  Bitmap b = view.getDrawingCache();  b.compress(CompressFormat.JPEG, 95, new FileOutputStream("/some/location/image.jpg"));  Where view is your View. The 95 is the quality of the JPG compression. And the file output stream is just that. link|flag answered Aug 20 at 3:04 Moncader 96512

I tried your code, but where does the root starts for the FileOutputStream? beacause I tried to look in the folders of the emulator and couldn't find the saved image... – Sephy Aug 21 at 12:21 1   It starts at the phones root. So if you want to load something from the sdcard, use the Environment.getExternalStorageDirectory() to get the root for the sdcard. – Moncader Aug 21 at 15:38 So can a LinerLayout be the view in this case and will that grab anything in the LinearLayout? – dweebsonduty Aug 23 at 21:16 @dweebsonduty, Yup that's right. – Moncader Aug 24 at 1:27 It looks like it works thanks and to you goes almost all of my rep :). Thanks guys!! – dweebsonduty Aug 24 at 1:38

up vote 0 down vote

File sdCard = Environment.getExternalStorageDirectory();  File file = new File(sdCard, "image.jpg");  FileOutputStream fos = new FileOutputStream(file);  Use fos reference as a 3rd parameter of b.compress() method in Moncader's answer. The image will be stored as image.jpg in root directory of your sd card. link|flag answered Aug 23 at 19:31