diff --git a/app/src/main/java/com/hippo/ehviewer/StartActivity.java b/app/src/main/java/com/hippo/ehviewer/StartActivity.java
index 1633095ff..b65545ac5 100644
--- a/app/src/main/java/com/hippo/ehviewer/StartActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/StartActivity.java
@@ -19,7 +19,6 @@ package com.hippo.ehviewer;
 import android.app.AlertDialog;
 import android.content.Intent;
 import android.graphics.Typeface;
-import android.net.Uri;
 import android.os.Bundle;
 import android.text.util.Linkify;
 import android.view.View;
@@ -31,6 +30,7 @@ import com.hippo.ehviewer.app.MaterialAlertDialog;
 import com.hippo.ehviewer.network.Network;
 import com.hippo.ehviewer.ui.AbsActivity;
 import com.hippo.ehviewer.ui.GalleryListActivity;
+import com.hippo.ehviewer.util.AppUtils;
 import com.hippo.ehviewer.util.Config;
 import com.hippo.ehviewer.util.Crash;
 import com.hippo.ehviewer.util.Secret;
@@ -160,11 +160,9 @@ public class StartActivity extends AbsActivity {
                                                     return true;
                                                 }
                                             }).show();
-                            Intent i = new Intent(Intent.ACTION_SENDTO);
-                            i.setData(Uri.parse("mailto:ehviewersu@gmail.com"));
-                            i.putExtra(Intent.EXTRA_SUBJECT, "I found a bug in EhViewer !");
-                            i.putExtra(Intent.EXTRA_TEXT, lastCrash + "======== Description ========\n" + et.getText().toString());
-                            startActivity(i);
+                            AppUtils.sendEmail(StartActivity.this, "ehviewersu@gmail.com",
+                                    "I found a bug in EhViewer !",
+                                    lastCrash + "======== Description ========\n" + et.getText().toString());
                             lastCrash = null;
                             break;
                         case MaterialAlertDialog.NEGATIVE:
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java b/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
index 3cff5379f..ec19a61f7 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java
@@ -16,15 +16,6 @@
 
 package com.hippo.ehviewer.ui;
 
-import java.io.BufferedInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -67,6 +58,7 @@ import com.hippo.ehviewer.ehclient.EhClient;
 import com.hippo.ehviewer.ehclient.EhInfo;
 import com.hippo.ehviewer.network.HttpHelper;
 import com.hippo.ehviewer.preference.ListPreference;
+import com.hippo.ehviewer.util.AppUtils;
 import com.hippo.ehviewer.util.BgThread;
 import com.hippo.ehviewer.util.Config;
 import com.hippo.ehviewer.util.DialogUtils;
@@ -80,6 +72,15 @@ import com.hippo.ehviewer.widget.CategoryTable;
 import com.hippo.ehviewer.widget.MaterialToast;
 import com.hippo.ehviewer.widget.SuggestionHelper;
 
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 public class SettingsActivity extends AbsPreferenceActivity {
     @SuppressWarnings("unused")
     private static String TAG = SettingsActivity.class.getSimpleName();
@@ -805,10 +806,8 @@ public class SettingsActivity extends AbsPreferenceActivity {
                 }
 
             } else if (KEY_AUTHOR.equals(key)) {
-                Intent i = new Intent(Intent.ACTION_SENDTO);
-                i.setData(Uri.parse("mailto:ehviewersu@gmail.com"));
-                i.putExtra(Intent.EXTRA_SUBJECT, "About EhViewer");
-                startActivity(i);
+                AppUtils.sendEmail(getActivity(), "ehviewersu@gmail.com",
+                        "About EhViewer", null);
 
             } else if (KEY_TWITTER.equals(key)) {
                 new MaterialAlertDialog.Builder(getActivity())
diff --git a/app/src/main/java/com/hippo/ehviewer/util/AppUtils.java b/app/src/main/java/com/hippo/ehviewer/util/AppUtils.java
new file mode 100644
index 000000000..2c9d7a989
--- /dev/null
+++ b/app/src/main/java/com/hippo/ehviewer/util/AppUtils.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * 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 com.hippo.ehviewer.util;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+public final class AppUtils {
+
+    // TODO add common error tip
+    public static void sendEmail(@NonNull Activity from, @NonNull String email,
+            @Nullable String subject, @Nullable String text) {
+        Intent i = new Intent(Intent.ACTION_SENDTO);
+        i.setData(Uri.parse("mailto:" + email));
+        if (subject != null) {
+            i.putExtra(Intent.EXTRA_SUBJECT, subject);
+        }
+        if (text != null) {
+            i.putExtra(Intent.EXTRA_TEXT, text);
+        }
+
+        try {
+            from.startActivity(i);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}