#1661 - Don't expose CertifyActivity

*Add new activity - RedirectImportKeysActivity, which prompts user to
use Openkeychain directly
*Add intent filter for the activity
*Change intent filter for CertifyActivity

OpenKeychain/src/main/AndroidManifest.xml

@@ -711,6 +711,15 @@
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
 
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".ui.MainActivity" />
+        </activity>
+        <activity
+            android:name=".ui.RedirectImportKeysActivity"
+            android:configChanges="orientation|screenSize|keyboardHidden|keyboard"
+            android:label="@string/title_activity_redirect_key">  >
+
             <!-- VIEW with fingerprint scheme:
                       Handle URIs with fingerprints when scanning directly from Barcode Scanner -->
             <intent-filter android:label="@string/intent_import_key">
@@ -726,11 +735,9 @@
                 <data android:scheme="OpenPGP4Fpr" />
                 <data android:scheme="OpenPGP4fpr" />
             </intent-filter>
-
-            <meta-data
-                android:name="android.support.PARENT_ACTIVITY"
-                android:value=".ui.MainActivity" />
         </activity>
+
+
         <activity
             android:name=".ui.LogDisplayActivity"
             android:configChanges="orientation|screenSize|keyboardHidden|keyboard"

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/RedirectImportKeysActivity.java

@@ -0,0 +1,60 @@
+/*
+ *
+ *
+ * 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.sufficientlysecure.keychain.ui;
+
+import android.app.Activity;
+
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.ui.base.BaseActivity;
+
+public class RedirectImportKeysActivity extends BaseActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setFullScreenDialogClose(Activity.RESULT_CANCELED, true);
+        final Intent intent = new Intent(this, org.sufficientlysecure.keychain.ui.ImportKeysActivity.class);
+
+        new AlertDialog.Builder(this)
+                .setTitle("Import key attempt")
+                .setMessage("You scanned a fingerprint with another app, please scan with Openkeychain directly to be safe" )
+                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        // intent directly to ImportKeyChain activity
+                        startActivity(intent);
+                    }
+                })
+                .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        // close window
+                        finish();
+                    }
+                })
+                .setIcon(android.R.drawable.ic_dialog_alert)
+                .show();
+    }
+
+    @Override
+    protected void initLayout() {
+        setContentView(R.layout.redirect_import_keys_activity);
+    }
+}

OpenKeychain/src/main/res/layout/redirect_import_keys_activity.xml

@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <include
+        android:id="@+id/toolbar_include"
+        layout="@layout/toolbar_standalone" />
+
+    <!--
+        fitsSystemWindows and layout_marginTop from
+        https://medium.com/@ngdelamo/using-drawerlayout-the-material-way-i-716bba2b5705
+    -->
+    <LinearLayout
+        android:layout_below="@id/toolbar_include"
+        android:fitsSystemWindows="true"
+        android:layout_marginTop="@dimen/minus_statusbar_height"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <include layout="@layout/notify_area" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:id="@+id/import_keys_top_layout"
+            android:visibility="gone"
+            tools:visibility="visible">
+
+            <FrameLayout
+                android:id="@+id/import_keys_top_container"
+                android:layout_width="match_parent"
+                android:layout_height="64dp"
+                android:orientation="vertical" />
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="1dip"
+                android:background="?android:attr/listDivider" />
+
+        </LinearLayout>
+
+        <FrameLayout
+            android:id="@+id/import_keys_list_container"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:orientation="vertical"
+            android:layout_weight="1" />
+
+        <RelativeLayout
+            android:id="@+id/import_footer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <View
+                android:id="@+id/import_divider"
+                android:layout_width="match_parent"
+                android:layout_height="1dip"
+                android:background="?android:attr/listDivider" />
+
+            <RelativeLayout
+                android:id="@+id/import_snackbar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_alignBottom="@id/import_import" />
+
+        </RelativeLayout>
+    </LinearLayout>
+</RelativeLayout>

OpenKeychain/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

OpenKeychain/src/main/res/values/dimens.xml

@@ -5,4 +5,7 @@
     <dimen name="big_toolbar">120dp</dimen>
     <dimen name="huge_toolbar">222dp</dimen>
     <dimen name="minus_statusbar_height">0dp</dimen>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
 </resources>

OpenKeychain/src/main/res/values/strings.xml

@@ -1740,4 +1740,6 @@
         <item>50 EUR</item>
         <item>100 EUR</item>
     </string-array>
+    <string name="title_activity_redirect_key">RedirectKeyActivity</string>
+    <string name="action_settings">Settings</string>
 </resources>