Android Image Viewer from App

Question

I'm trying to launch an image which is written to my application directory with the builtin Android image viewer. This image has been written in a different part of the app to the app directory. When getting the following file:

super.getFilesDir() + "/current.png"

File.exists() returns true.

How can i launch the builtin Android image viewer to view this file? Currently i'm doing:

File f = new File(super.getFilesDir()+"/current.png");
uri = Uri.parse("file://"+super.getFilesDir()+"/current.png");
startActivity(new Intent(Intent.ACTION_VIEW, uri));

And it keeps churning out:

10-11 13:09:24.367: INFO/ActivityManager(564): Starting activity: Intent { act=android.intent.action.VIEW dat=file:///data/data/com.davidgoemans.myapp/files/current.png } 10-11 13:09:24.367: ERROR/myapp(2166): Exception occuredandroid.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:///data/data/com.davidgoemans.myapp/files/current.png }

irrespective of what i change the uri schema to ( eg, content://, file://, media://, image:// ).

Answer 1

One way is to implement a context provider to give other applications access to your data.

Create a new class containing:

public class FileContentProvider extends ContentProvider {
   private static final String URI_PREFIX = "content://uk.co.ashtonbrsc.examplefilecontentprovider";

   public static String constructUri(String url) {
       Uri uri = Uri.parse(url);
       return uri.isAbsolute() ? url : URI_PREFIX + url;
   }

   @Override
   public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
       File file = new File(uri.getPath());
       ParcelFileDescriptor parcel = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
       return parcel;
   }

   @Override
   public boolean onCreate() {
       return true;
   }

   @Override
   public int delete(Uri uri, String s, String[] as) {
       throw new UnsupportedOperationException("Not supported by this provider");
   }

   @Override
   public String getType(Uri uri) {
   throw new UnsupportedOperationException("Not supported by this provider");
   }

   @Override
   public Uri insert(Uri uri, ContentValues contentvalues) {
       throw new UnsupportedOperationException("Not supported by this provider");
   }

   @Override
   public Cursor query(Uri uri, String[] as, String s, String[] as1, String s1) {
       throw new UnsupportedOperationException("Not supported by this provider");
   }

   @Override
   public int update(Uri uri, ContentValues contentvalues, String s, String[] as) {
       throw new UnsupportedOperationException("Not supported by this provider");
   }

}

Add the content provider to your AndroidManifest.xml:

<provider android:name=".FileContentProvider" android:authorities="uk.co.ashtonbrsc.examplefilecontentprovider" />

You should then be able to use "content://uk.co.ashtonbrsc.examplefilecontentprovider/" + the full path to the image in your ACTION_VIEW intent.