Get length of content uri

imagepipeline/src/main/java/com/facebook/imagepipeline/producers/LocalContentUriFetchProducer.java

@@ -9,25 +9,32 @@
 
 package com.facebook.imagepipeline.producers;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.concurrent.Executor;
-
 import android.content.ContentResolver;
+import android.database.Cursor;
 import android.net.Uri;
 import android.provider.ContactsContract;
+import android.provider.MediaStore;
 
 import com.facebook.common.internal.VisibleForTesting;
 import com.facebook.imagepipeline.memory.PooledByteBufferFactory;
 import com.facebook.imagepipeline.request.ImageRequest;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.concurrent.Executor;
+
+import javax.annotation.Nullable;
+
 /**
  * Represents a local content Uri fetch producer.
  */
 public class LocalContentUriFetchProducer extends LocalFetchProducer {
   @VisibleForTesting static final String PRODUCER_NAME = "LocalContentUriFetchProducer";
   private static final String DISPLAY_PHOTO_PATH =
       Uri.withAppendedPath(ContactsContract.AUTHORITY_URI, "display_photo").getPath();
+  private static final String[] PROJECTION = new String[] { MediaStore.Images.ImageColumns.DATA };
 
   private final ContentResolver mContentResolver;
 
@@ -46,6 +53,14 @@ protected InputStream getInputStream(ImageRequest imageRequest) throws IOExcepti
       // If a Contact URI is provided, use the special helper to open that contact's photo.
       return ContactsContract.Contacts.openContactPhotoInputStream(mContentResolver, uri);
     }
+
+    if (isCameraUri(uri)) {
+      String pathname = getCameraPath(uri);
+      if (pathname != null) {
+        return new FileInputStream(pathname);
+      }
+    }
+
     return mContentResolver.openInputStream(uri);
   }
 
@@ -54,14 +69,39 @@ protected InputStream getInputStream(ImageRequest imageRequest) throws IOExcepti
    * @param uri the URI to check
    * @return true if the uri is a a Contact URI, and is not already specifying a display photo.
    */
-  private boolean isContactUri(Uri uri) {
+  private static boolean isContactUri(Uri uri) {
     return ContactsContract.AUTHORITY.equals(uri.getAuthority()) &&
         !uri.getPath().startsWith(DISPLAY_PHOTO_PATH);
   }
 
+  private static boolean isCameraUri(Uri uri) {
+    String uriString = uri.toString();
+    return uriString.startsWith(MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString()) ||
+        uriString.startsWith(MediaStore.Images.Media.INTERNAL_CONTENT_URI.toString());
+  }
+
+  private @Nullable String getCameraPath(Uri uri) {
+    Cursor cursor = mContentResolver.query(uri, PROJECTION, null, null, null);
+    if (cursor == null) {
+      return null;
+    }
+    try {
+      cursor.moveToFirst();
+      return cursor.getString(0);
+    } finally {
+      cursor.close();
+    }
+  }
+
   @Override
   protected int getLength(ImageRequest imageRequest) {
-    return -1;
+    Uri uri = imageRequest.getSourceUri();
+    if (isCameraUri(uri)) {
+      String pathname = getCameraPath(uri);
+      return pathname == null ? -1 : (int) new File(pathname).length();
+    } else {
+      return -1;
+    }
   }
 
   @Override