Add clear download path cache

app/src/main/java/com/hippo/ehviewer/EhDB.java

@@ -364,6 +364,11 @@ public class EhDB {
         dao.deleteByKey(gid);
     }
 
+    public static synchronized void clearDownloadDirname() {
+        DownloadDirnameDao dao = sDaoSession.getDownloadDirnameDao();
+        dao.deleteAll();
+    }
+
     @NonNull
     public static synchronized List<DownloadLabel> getAllDownloadLabelList() {
         DownloadLabelDao dao = sDaoSession.getDownloadLabelDao();

app/src/main/java/com/hippo/ehviewer/preference/ClearDownloadPathCachePreference.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2016 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.preference;
+
+import android.content.Context;
+import android.support.v7.app.AlertDialog;
+import android.util.AttributeSet;
+
+import com.hippo.ehviewer.EhDB;
+import com.hippo.ehviewer.R;
+import com.hippo.preference.MessagePreference;
+
+public class ClearDownloadPathCachePreference extends MessagePreference {
+
+    public ClearDownloadPathCachePreference(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public ClearDownloadPathCachePreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public ClearDownloadPathCachePreference(Context context,
+            AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context);
+    }
+
+    public ClearDownloadPathCachePreference(Context context,
+            AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        init(context);
+    }
+
+    public void init(Context context) {
+        setDialogMessage(context.getString(R.string.settings_advanced_clear_download_path_cache_message));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        super.onPrepareDialogBuilder(builder);
+        builder.setTitle(null);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult) {
+            EhDB.clearDownloadDirname();
+        }
+    }
+}

app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java

@@ -58,8 +58,8 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
             }
             Resources resources = getResources();
             Toast.makeText(getActivity(),
-                    ok ? resources.getString(R.string.settings_about_dump_logcat_to, file.getPath()) :
-                            resources.getString(R.string.settings_about_dump_logcat_failed), Toast.LENGTH_SHORT).show();
+                    ok ? resources.getString(R.string.settings_advanced_dump_logcat_to, file.getPath()) :
+                            resources.getString(R.string.settings_advanced_dump_logcat_failed), Toast.LENGTH_SHORT).show();
             return true;
         }
         return false;