diff --git a/APG-API-Demo/AndroidManifest.xml b/APG-API-Demo/AndroidManifest.xml
index 8d7a9e970..4112b8a09 100644
--- a/APG-API-Demo/AndroidManifest.xml
+++ b/APG-API-Demo/AndroidManifest.xml
@@ -31,6 +31,10 @@
             android:name=".AidlDemoActivity"
             android:label="Aidl Demo"
             android:windowSoftInputMode="stateHidden" />
+        <activity
+            android:name=".ContentProviderDemoActivity"
+            android:label="Content Provider Demo"
+            android:windowSoftInputMode="stateHidden" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/APG-API-Demo/res/layout/content_provider_demo.xml b/APG-API-Demo/res/layout/content_provider_demo.xml
new file mode 100644
index 000000000..279324cda
--- /dev/null
+++ b/APG-API-Demo/res/layout/content_provider_demo.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content" >
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical" >
+
+        <Button
+            android:id="@+id/content_provider_test1"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="test1OnClick"
+            android:text="Test 1" />
+
+        <Button
+            android:id="@+id/content_provider_test2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:onClick="test2OnClick"
+            android:text="Test 2" />
+
+        <EditText
+            android:id="@+id/content_provider_output"
+            android:layout_width="match_parent"
+            android:layout_height="150dip"
+            android:text="output"
+            android:textAppearance="@android:style/TextAppearance.Small" />
+    </LinearLayout>
+
+</ScrollView>
\ No newline at end of file
diff --git a/APG-API-Demo/res/xml/base_preference.xml b/APG-API-Demo/res/xml/base_preference.xml
index c56e54746..3fcd036e2 100644
--- a/APG-API-Demo/res/xml/base_preference.xml
+++ b/APG-API-Demo/res/xml/base_preference.xml
@@ -11,5 +11,10 @@
             android:key="aidl_demo"
             android:title="AIDL Demo" />
     </PreferenceCategory>
+    <PreferenceCategory android:title="Content Provider" >
+        <Preference
+            android:key="content_provider_demo"
+            android:title="Content Provider Demo" />
+    </PreferenceCategory>
 
 </PreferenceScreen>
\ No newline at end of file
diff --git a/APG-API-Demo/src/org/thialfihar/android/apg/demo/AidlDemoActivity.java b/APG-API-Demo/src/org/thialfihar/android/apg/demo/AidlDemoActivity.java
index f066e0957..7c08c0e06 100644
--- a/APG-API-Demo/src/org/thialfihar/android/apg/demo/AidlDemoActivity.java
+++ b/APG-API-Demo/src/org/thialfihar/android/apg/demo/AidlDemoActivity.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.thialfihar.android.apg.demo;
 
 import org.thialfihar.android.apg.integration.ApgData;
@@ -17,7 +33,6 @@ import android.os.IBinder;
 import android.os.RemoteException;
 import android.view.View;
 import android.widget.TextView;
-import android.widget.Toast;
 
 public class AidlDemoActivity extends Activity {
     Activity mActivity;
diff --git a/APG-API-Demo/src/org/thialfihar/android/apg/demo/BaseActivity.java b/APG-API-Demo/src/org/thialfihar/android/apg/demo/BaseActivity.java
index 3f46b2e4d..66c3a9a0e 100644
--- a/APG-API-Demo/src/org/thialfihar/android/apg/demo/BaseActivity.java
+++ b/APG-API-Demo/src/org/thialfihar/android/apg/demo/BaseActivity.java
@@ -30,6 +30,7 @@ public class BaseActivity extends PreferenceActivity {
 
     private Preference mIntentDemo;
     private Preference mAidlDemo;
+    private Preference mContentProviderDemo;
 
     /**
      * Called when the activity is first created.
@@ -46,6 +47,7 @@ public class BaseActivity extends PreferenceActivity {
         // find preferences
         mIntentDemo = (Preference) findPreference("intent_demo");
         mAidlDemo = (Preference) findPreference("aidl_demo");
+        mContentProviderDemo = (Preference) findPreference("content_provider_demo");
 
         mIntentDemo.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             @Override
@@ -64,6 +66,15 @@ public class BaseActivity extends PreferenceActivity {
                 return false;
             }
         });
+
+        mContentProviderDemo.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                startActivity(new Intent(mActivity, ContentProviderDemoActivity.class));
+
+                return false;
+            }
+        });
     }
 
 }
diff --git a/APG-API-Demo/src/org/thialfihar/android/apg/demo/ContentProviderDemoActivity.java b/APG-API-Demo/src/org/thialfihar/android/apg/demo/ContentProviderDemoActivity.java
new file mode 100644
index 000000000..6d7696a32
--- /dev/null
+++ b/APG-API-Demo/src/org/thialfihar/android/apg/demo/ContentProviderDemoActivity.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.demo;
+
+import java.util.Arrays;
+
+import org.thialfihar.android.apg.demo.R;
+import org.thialfihar.android.apg.integration.ApgContentProviderHelper;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.TextView;
+
+public class ContentProviderDemoActivity extends Activity {
+    Activity mActivity;
+
+    TextView mOutputTextView;
+    TextView mCiphertextTextView;
+    TextView mDataTextView;
+
+    ApgContentProviderHelper mApgContentProviderHelper;
+
+    /**
+     * Instantiate View for this Activity
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.content_provider_demo);
+
+        mActivity = this;
+
+        mOutputTextView = (TextView) findViewById(R.id.content_provider_output);
+
+        mApgContentProviderHelper = new ApgContentProviderHelper(mActivity);
+    }
+
+    public void test1OnClick(View view) {
+        long[] test = mApgContentProviderHelper.getPublicKeyIdsFromEmail("user@example.com");
+        mOutputTextView.setText(Arrays.toString(test));
+    }
+
+    public void test2OnClick(View view) {
+        boolean test = mApgContentProviderHelper.hasPublicKeyForEmail("user@example.com");
+        if (test) {
+            mOutputTextView.setText("true");
+        } else {
+            mOutputTextView.setText("false");
+        }
+    }
+
+}
diff --git a/APG-API-Lib/src/org/thialfihar/android/apg/integration/ContentProviderHelper.java b/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgContentProviderHelper.java
similarity index 98%
rename from APG-API-Lib/src/org/thialfihar/android/apg/integration/ContentProviderHelper.java
rename to APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgContentProviderHelper.java
index 7b725fe06..2c2531b02 100644
--- a/APG-API-Lib/src/org/thialfihar/android/apg/integration/ContentProviderHelper.java
+++ b/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgContentProviderHelper.java
@@ -24,7 +24,7 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.widget.Toast;
 
-public class ContentProviderHelper {
+public class ApgContentProviderHelper {
     public static final String AUTHORITY = Constants.APG_PACKAGE_NAME;
 
     public static final Uri CONTENT_URI_PUBLIC_KEY_RING_BY_KEY_ID = Uri.parse("content://"
@@ -39,7 +39,7 @@ public class ContentProviderHelper {
 
     private Context activity;
 
-    public ContentProviderHelper(Activity activity) {
+    public ApgContentProviderHelper(Activity activity) {
         this.activity = activity;
     }
 
diff --git a/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgIntentHelper.java b/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgIntentHelper.java
index f1b4c2bd1..09a544f26 100644
--- a/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgIntentHelper.java
+++ b/APG-API-Lib/src/org/thialfihar/android/apg/integration/ApgIntentHelper.java
@@ -293,7 +293,7 @@ public class ApgIntentHelper {
         long[] initialKeyIds = null;
         if (apgData == null || !apgData.hasEncryptionKeys()) {
 
-            ContentProviderHelper cPHelper = new ContentProviderHelper(activity);
+            ApgContentProviderHelper cPHelper = new ApgContentProviderHelper(activity);
 
             initialKeyIds = cPHelper.getPublicKeyIdsFromEmail(emails);
 
diff --git a/APG/src/org/thialfihar/android/apg/provider/ApgContract.java b/APG/src/org/thialfihar/android/apg/provider/ApgContract.java
index aeb7d48f0..c68eec750 100644
--- a/APG/src/org/thialfihar/android/apg/provider/ApgContract.java
+++ b/APG/src/org/thialfihar/android/apg/provider/ApgContract.java
@@ -58,7 +58,7 @@ public class ApgContract {
     }
 
     public static final String CONTENT_AUTHORITY_EXTERNAL = Constants.PACKAGE_NAME;
-    public static final String CONTENT_AUTHORITY_INTERNAL = Constants.PACKAGE_NAME + "_internal";
+    public static final String CONTENT_AUTHORITY_INTERNAL = Constants.PACKAGE_NAME + ".internal";
 
     private static final Uri BASE_CONTENT_URI_INTERNAL = Uri.parse("content://"
             + CONTENT_AUTHORITY_INTERNAL);
diff --git a/APG/src/org/thialfihar/android/apg/provider/ApgProvider.java b/APG/src/org/thialfihar/android/apg/provider/ApgProvider.java
index a7ec253a3..6b1c9fdb7 100644
--- a/APG/src/org/thialfihar/android/apg/provider/ApgProvider.java
+++ b/APG/src/org/thialfihar/android/apg/provider/ApgProvider.java
@@ -73,14 +73,14 @@ public class ApgProvider extends ContentProvider {
 
     private static final int DATA_STREAM = 301;
 
-    protected static boolean sInternalProvider;
-    protected static UriMatcher sUriMatcher;
+    protected boolean mInternalProvider;
+    protected UriMatcher mUriMatcher;
 
     /**
      * Build and return a {@link UriMatcher} that catches all {@link Uri} variations supported by
      * this {@link ContentProvider}.
      */
-    protected static UriMatcher buildUriMatcher(boolean internalProvider) {
+    protected UriMatcher buildUriMatcher(boolean internalProvider) {
         final UriMatcher matcher = new UriMatcher(UriMatcher.NO_MATCH);
 
         String authority;
@@ -205,6 +205,8 @@ public class ApgProvider extends ContentProvider {
     /** {@inheritDoc} */
     @Override
     public boolean onCreate() {
+        mUriMatcher = buildUriMatcher(mInternalProvider);
+
         mApgDatabase = new ApgDatabase(getContext());
         return true;
     }
@@ -212,7 +214,7 @@ public class ApgProvider extends ContentProvider {
     /** {@inheritDoc} */
     @Override
     public String getType(Uri uri) {
-        final int match = sUriMatcher.match(uri);
+        final int match = mUriMatcher.match(uri);
         switch (match) {
         case PUBLIC_KEY_RING:
         case PUBLIC_KEY_RING_BY_EMAILS:
@@ -302,7 +304,7 @@ public class ApgProvider extends ContentProvider {
         projectionMap.put(KeyRingsColumns.MASTER_KEY_ID, Tables.KEY_RINGS + "."
                 + KeyRingsColumns.MASTER_KEY_ID);
         // only give out keyRing blob when we are using the internal content provider
-        if (sInternalProvider) {
+        if (mInternalProvider) {
             projectionMap.put(KeyRingsColumns.KEY_RING_DATA, Tables.KEY_RINGS + "."
                     + KeyRingsColumns.KEY_RING_DATA);
         }
@@ -331,7 +333,7 @@ public class ApgProvider extends ContentProvider {
         projectionMap.put(KeysColumns.EXPIRY, KeysColumns.EXPIRY);
         projectionMap.put(KeysColumns.KEY_RING_ROW_ID, KeysColumns.KEY_RING_ROW_ID);
         // only give out keyRing blob when we are using the internal content provider
-        if (sInternalProvider) {
+        if (mInternalProvider) {
             projectionMap.put(KeysColumns.KEY_DATA, KeysColumns.KEY_DATA);
         }
         projectionMap.put(KeysColumns.RANK, KeysColumns.RANK);
@@ -399,7 +401,7 @@ public class ApgProvider extends ContentProvider {
         SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
         SQLiteDatabase db = mApgDatabase.getReadableDatabase();
 
-        int match = sUriMatcher.match(uri);
+        int match = mUriMatcher.match(uri);
 
         switch (match) {
         case PUBLIC_KEY_RING:
@@ -579,7 +581,7 @@ public class ApgProvider extends ContentProvider {
         Uri rowUri = null;
         long rowId = -1;
         try {
-            final int match = sUriMatcher.match(uri);
+            final int match = mUriMatcher.match(uri);
 
             switch (match) {
             case PUBLIC_KEY_RING:
@@ -641,7 +643,7 @@ public class ApgProvider extends ContentProvider {
         final SQLiteDatabase db = mApgDatabase.getWritableDatabase();
 
         int count;
-        final int match = sUriMatcher.match(uri);
+        final int match = mUriMatcher.match(uri);
 
         String defaultSelection = null;
         switch (match) {
@@ -691,7 +693,7 @@ public class ApgProvider extends ContentProvider {
         String defaultSelection = null;
         int count = 0;
         try {
-            final int match = sUriMatcher.match(uri);
+            final int match = mUriMatcher.match(uri);
             switch (match) {
             case PUBLIC_KEY_RING_BY_ROW_ID:
             case SECRET_KEY_RING_BY_ROW_ID:
@@ -814,7 +816,7 @@ public class ApgProvider extends ContentProvider {
 
     @Override
     public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
-        int match = sUriMatcher.match(uri);
+        int match = mUriMatcher.match(uri);
         if (match != DATA_STREAM) {
             throw new FileNotFoundException();
         }
diff --git a/APG/src/org/thialfihar/android/apg/provider/ApgProviderExternal.java b/APG/src/org/thialfihar/android/apg/provider/ApgProviderExternal.java
index 61cca8bed..18a78e440 100644
--- a/APG/src/org/thialfihar/android/apg/provider/ApgProviderExternal.java
+++ b/APG/src/org/thialfihar/android/apg/provider/ApgProviderExternal.java
@@ -24,9 +24,8 @@ package org.thialfihar.android.apg.provider;
  */
 public class ApgProviderExternal extends ApgProvider {
 
-    static {
-        sInternalProvider = false;
-        sUriMatcher = buildUriMatcher(sInternalProvider);
+    public ApgProviderExternal() {
+        mInternalProvider = false;
     }
 
 }
diff --git a/APG/src/org/thialfihar/android/apg/provider/ApgProviderInternal.java b/APG/src/org/thialfihar/android/apg/provider/ApgProviderInternal.java
index e2226a0fa..4c7b4d453 100644
--- a/APG/src/org/thialfihar/android/apg/provider/ApgProviderInternal.java
+++ b/APG/src/org/thialfihar/android/apg/provider/ApgProviderInternal.java
@@ -22,9 +22,8 @@ package org.thialfihar.android.apg.provider;
  */
 public class ApgProviderInternal extends ApgProvider {
 
-    static {
-        sInternalProvider = true;
-        sUriMatcher = buildUriMatcher(sInternalProvider);
+    public ApgProviderInternal() {
+        mInternalProvider = true;
     }
 
 }