add up navigation in ViewCertActivity

Fixes #567

2 files changed, 11 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
index 08b4412af..78aa4263e 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/provider/KeychainContract.java
@@ -127,6 +127,10 @@ public class KeychainContract {
             return CONTENT_URI.buildUpon().appendPath(masterKeyId).build();
         }
 
+        public static Uri buildGenericKeyRingUri(Uri uri) {
+            return CONTENT_URI.buildUpon().appendPath(uri.getPathSegments().get(1)).build();
+        }
+
         public static Uri buildUnifiedKeyRingUri(String masterKeyId) {
             return CONTENT_URI.buildUpon().appendPath(masterKeyId).appendPath(PATH_UNIFIED).build();
         }
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
index bd2785fad..899d9864e 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewCertActivity.java
@@ -22,6 +22,7 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.support.v4.app.LoaderManager;
+import android.support.v4.app.NavUtils;
 import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.support.v7.app.ActionBar;
@@ -226,6 +227,12 @@ public class ViewCertActivity extends ActionBarActivity
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+            case android.R.id.home: {
+                Intent viewIntent = NavUtils.getParentActivityIntent(this);
+                viewIntent.setData(KeyRings.buildGenericKeyRingUri(mDataUri));
+                NavUtils.navigateUpTo(this, viewIntent);
+                return true;
+            }
             case R.id.menu_view_cert_view_signer:
                 // can't do this before the data is initialized
                 Intent viewIntent = new Intent(this, ViewKeyActivity.class);