adds AppDataProvider

app/build.gradle

@@ -26,9 +26,16 @@ android {
     }
 }
 
+repositories {
+    maven {
+        url "https://s3.amazonaws.com/repo.commonsware.com"
+    }
+}
+
 dependencies {
     compile project(':orbotservice')
     compile 'com.android.support:support-v4:23.4.0'
     compile 'com.android.support:appcompat-v7:23.4.0'
     compile 'com.android.support:design:23.4.0'
+    compile 'com.commonsware.cwac:provider:0.4.4'
 }

app/src/main/AndroidManifest.xml

@@ -149,6 +149,16 @@
             android:name=".ui.hs.providers.HSContentProvider"
             android:exported="false"
             android:authorities="org.torproject.android.ui.hs.providers" />
+
+        <provider
+            android:name="com.commonsware.cwac.provider.StreamProvider"
+            android:authorities="org.torproject.android.backup"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="com.commonsware.cwac.provider.STREAM_PROVIDER_PATHS"
+                android:resource="@xml/hidden_services_paths"/>
+        </provider>
     </application>
 
 </manifest>

app/src/main/java/org/torproject/android/storage/AppDataProvider.java

@@ -0,0 +1,39 @@
+package org.torproject.android.storage;
+
+
+import android.app.Application;
+import android.content.Context;
+
+import com.commonsware.cwac.provider.LocalPathStrategy;
+import com.commonsware.cwac.provider.StreamProvider;
+import com.commonsware.cwac.provider.StreamStrategy;
+
+import org.torproject.android.service.TorServiceConstants;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+public class AppDataProvider extends StreamProvider {
+    private static final String TAG = "app-data-path";
+
+    @Override
+    protected StreamStrategy buildStrategy(Context context,
+                                           String tag, String name,
+                                           String path,
+                                           HashMap<String, String> attrs)
+            throws IOException {
+
+        if (TAG.equals(tag)) {
+            return (new LocalPathStrategy(
+                    name,
+                    context.getDir(
+                            TorServiceConstants.DIRECTORY_TOR_DATA,
+                            Application.MODE_PRIVATE
+                    )
+            )
+            );
+        }
+
+        return (super.buildStrategy(context, tag, name, path, attrs));
+    }
+}

app/src/main/res/xml/hidden_services_paths.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <app-data-path name="hidden-services" path="hidden_services/"/>
+
+</paths>