Improve sharing *a lot* +GIF - add support for multiple filetypes

* now supporting GIFs too ;)
* Create connection over netcipher

app/src/main/java/net/gsantner/opoc/format/markdown/SimpleMarkdownParser.java

@@ -9,7 +9,7 @@
  *
 #########################################################*/
 
- /*
+/*
  * Parses most common markdown tags. Only inline tags are supported, multiline/block syntax
  * is not supported (citation, multiline code, ..). This is intended to stay as easy as possible.
  *

app/src/main/java/net/gsantner/opoc/preference/nonsupport/LanguagePreference.java

@@ -48,8 +48,8 @@ package net.gsantner.opoc.preference.nonsupport;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build;
-import android.support.annotation.Nullable;
 import android.preference.ListPreference;
+import android.support.annotation.Nullable;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 

app/src/main/java/net/gsantner/opoc/util/DownloadTask.java

@@ -0,0 +1,57 @@
+/*
+    This file is part of the dandelion*.
+
+    dandelion* is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    dandelion* is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with the dandelion*.
+
+    If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.gsantner.opoc.util;
+
+import android.os.AsyncTask;
+import android.support.annotation.Nullable;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.net.ssl.HttpsURLConnection;
+
+import info.guardianproject.netcipher.NetCipher;
+
+public class DownloadTask extends AsyncTask<String, Void, Boolean> {
+    private File _targetFile;
+    private Callback.a2<Boolean, File> _callback;
+
+    public DownloadTask(File targetFile, @Nullable Callback.a2<Boolean, File> callback) {
+        _targetFile = targetFile;
+        _callback = callback;
+    }
+
+    protected Boolean doInBackground(String... urls) {
+        if (urls != null && urls.length > 0 && urls[0] != null) {
+            try {
+                HttpsURLConnection connection = NetCipher.getHttpsURLConnection(urls[0]);
+                return NetworkUtils.downloadFile(null, _targetFile, connection, null);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return false;
+    }
+
+    protected void onPostExecute(Boolean result) {
+        if (_callback != null) {
+            _callback.callback(result, _targetFile);
+        }
+    }
+}

app/src/main/java/net/gsantner/opoc/util/NetworkUtils.java

@@ -53,11 +53,16 @@ public class NetworkUtils {
     }
 
     public static boolean downloadFile(final URL url, final File outFile, final Callback.a1<Float> progressCallback) {
+        return downloadFile(url, outFile, null, progressCallback);
+    }
+
+    public static boolean downloadFile(final URL url, final File outFile, HttpURLConnection connection, final Callback.a1<Float> progressCallback) {
         InputStream input = null;
         OutputStream output = null;
-        HttpURLConnection connection = null;
         try {
-            connection = (HttpURLConnection) url.openConnection();
+            if (connection == null) {
+                connection = (HttpURLConnection) url.openConnection();
+            }
             connection.connect();
             input = connection.getInputStream();