Refactored local deletion to unify through FileDataStorageManager

src/com/owncloud/android/datamodel/FileDataStorageManager.java

@@ -434,7 +434,7 @@ public class FileDataStorageManager {
                     }
                     updateFolderSize(file.getParentId());
                 }
-                if (removeLocalCopy && file.isDown()) {
+                if (removeLocalCopy && file.isDown() && file.getStoragePath() != null) {
                     boolean success = new File(file.getStoragePath()).delete();
                     if (!removeDBData && success) {
                         // maybe unnecessary, but should be checked TODO remove if unnecessary

src/com/owncloud/android/ui/fragment/FileDetailFragment.java

@@ -473,12 +473,10 @@ public class FileDetailFragment extends FileFragment implements
     
     @Override
     public void onNeutral(String callerTag) {
-        File f = null;
         OCFile file = getFile();
-        if (file.isDown() && (f = new File(file.getStoragePath())).exists()) {
-            f.delete();
+        mStorageManager.removeFile(file, false, true);    // TODO perform in background task / new thread
+        if (file.getStoragePath() != null) {
             file.setStoragePath(null);
-            mStorageManager.saveFile(file);
             updateFileDetails(file, mAccount);
         }
     }

src/com/owncloud/android/ui/preview/PreviewImageFragment.java

@@ -16,7 +16,6 @@
  */
 package com.owncloud.android.ui.preview;
 
-import java.io.File;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
@@ -388,15 +387,9 @@ public class PreviewImageFragment extends FileFragment implements   OnRemoteOper
      */
     @Override
     public void onNeutral(String callerTag) {
-        // TODO this code should be made in a secondary thread,
         OCFile file = getFile();
-        if (file.isDown()) {   // checks it is still there
-            File f = new File(file.getStoragePath());
-            f.delete();
-            file.setStoragePath(null);
-            mStorageManager.saveFile(file);
-            finish();
-        }
+        mStorageManager.removeFile(file, false, true);    // TODO perform in background task / new thread
+        finish();
     }
     
     /**

src/com/owncloud/android/ui/preview/PreviewMediaFragment.java

@@ -16,7 +16,6 @@
  */
 package com.owncloud.android.ui.preview;
 
-import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -672,16 +671,10 @@ public class PreviewMediaFragment extends FileFragment implements
      */
     @Override
     public void onNeutral(String callerTag) {
-        // TODO this code should be made in a secondary thread,
         OCFile file = getFile();
-        if (file.isDown()) {   // checks it is still there
-            stopPreview(true);
-            File f = new File(file.getStoragePath());
-            f.delete();
-            file.setStoragePath(null);
-            mStorageManager.saveFile(file);
-            finish();
-        }
+        stopPreview(true);
+        mStorageManager.removeFile(file, false, true);    // TODO perform in background task / new thread
+        finish();
     }
     
     /**