Fix lint warnings (#319)

* Fix lint errors/warnings

Fix a lot of lint errors and warnings.
Most things are automatically applied fixes done with android studio:

* externalize strings
* remove unused code / classes / layouts / imports
* migrate some fields to local variables

* Remove dead code from comments

Removed code that is commented out long ago.

* remove unused resources

* colors
* strings
* drawables
* layouts
* menus

3 files changed, 30 insertions, 34 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/EntryRecyclerAdapter.java b/app/src/main/java/com/zeapo/pwdstore/utils/EntryRecyclerAdapter.java
index 5247c6a3..a36b1124 100644
--- a/app/src/main/java/com/zeapo/pwdstore/utils/EntryRecyclerAdapter.java
+++ b/app/src/main/java/com/zeapo/pwdstore/utils/EntryRecyclerAdapter.java
@@ -19,10 +19,10 @@ import java.util.TreeSet;
 
 public abstract class EntryRecyclerAdapter extends RecyclerView.Adapter<EntryRecyclerAdapter.ViewHolder> {
     private final Activity activity;
-    protected final ArrayList<PasswordItem> values;
-    protected final Set<Integer> selectedItems = new TreeSet<>();
+    private final ArrayList<PasswordItem> values;
+    final Set<Integer> selectedItems = new TreeSet<>();
 
-    public EntryRecyclerAdapter(Activity activity, ArrayList<PasswordItem> values) {
+    EntryRecyclerAdapter(Activity activity, ArrayList<PasswordItem> values) {
         this.activity = activity;
         this.values = values;
     }
@@ -52,7 +52,7 @@ public abstract class EntryRecyclerAdapter extends RecyclerView.Adapter<EntryRec
         this.notifyItemInserted(getItemCount());
     }
 
-    public void toggleSelection(int position) {
+    void toggleSelection(int position) {
         if (!selectedItems.remove(position)) {
             selectedItems.add(position);
         }
@@ -106,11 +106,6 @@ public abstract class EntryRecyclerAdapter extends RecyclerView.Adapter<EntryRec
         }
 
         holder.type.setText(pass.getFullPathToParent());
-        if (pass.getType() == PasswordItem.TYPE_CATEGORY) {
-//            holder.card.setCardBackgroundColor(activity.getResources().getColor(R.color.blue_grey_200));
-        } else {
-//            holder.card.setCardBackgroundColor(activity.getResources().getColor(R.color.blue_grey_50));
-        }
 
         holder.view.setOnClickListener(getOnClickListener(holder, pass));
 
@@ -134,14 +129,14 @@ public abstract class EntryRecyclerAdapter extends RecyclerView.Adapter<EntryRec
     // Provide a reference to the views for each data item
     // Complex data items may need more than one view per item, and
     // you provide access to all the views for a data item in a view holder
-    public static class ViewHolder extends RecyclerView.ViewHolder {
+    static class ViewHolder extends RecyclerView.ViewHolder {
         // each data item is just a string in this case
-        public View view;
-        public TextView name;
-        public TextView type;
-        public ImageView typeImage;
+        public final View view;
+        public final TextView name;
+        final TextView type;
+        final ImageView typeImage;
 
-        public ViewHolder(View v) {
+        ViewHolder(View v) {
             super(v);
             view = v;
             name = (TextView) view.findViewById(R.id.label);
diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/PasswordItem.java b/app/src/main/java/com/zeapo/pwdstore/utils/PasswordItem.java
index 404091b2..cfdb829d 100644
--- a/app/src/main/java/com/zeapo/pwdstore/utils/PasswordItem.java
+++ b/app/src/main/java/com/zeapo/pwdstore/utils/PasswordItem.java
@@ -1,5 +1,7 @@
 package com.zeapo.pwdstore.utils;
 
+import android.support.annotation.NonNull;
+
 import java.io.File;
 
 public class PasswordItem implements Comparable{
@@ -12,7 +14,6 @@ public class PasswordItem implements Comparable{
     private PasswordItem parent;
     private File file;
     private String fullPathToParent;
-    public boolean selected = false;
 
     /** Create a password item
      *
@@ -93,14 +94,15 @@ public class PasswordItem implements Comparable{
     }
 
     @Override
-    public boolean equals(Object o){
-        PasswordItem other = (PasswordItem) o;
+    public boolean equals(Object o) {
         // Makes it possible to have a category and a password with the same name
-        return (other.getFile().equals(this.getFile()));
-}
+        return o != null
+                && o.getClass() == PasswordItem.class
+                && ((PasswordItem) o).getFile().equals(this.getFile());
+    }
 
     @Override
-    public int compareTo(Object o) {
+    public int compareTo(@NonNull Object o) {
         PasswordItem other = (PasswordItem) o;
         // Appending the type will make the sort type dependent
         return (this.getType() + this.getName())
diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/PasswordRepository.java b/app/src/main/java/com/zeapo/pwdstore/utils/PasswordRepository.java
index ab86d2e1..d97e3294 100644
--- a/app/src/main/java/com/zeapo/pwdstore/utils/PasswordRepository.java
+++ b/app/src/main/java/com/zeapo/pwdstore/utils/PasswordRepository.java
@@ -27,7 +27,6 @@ import static java.util.Collections.sort;
 public class PasswordRepository {
 
     private static Repository repository;
-    private static boolean initialized = false;
 
     protected PasswordRepository(){    }
 
@@ -165,13 +164,13 @@ public class PasswordRepository {
      * @return the list of gpg files in that directory
      */
     public static ArrayList<File> getFilesList(File path){
-        if (!path.exists()) return new ArrayList<File>();
+        if (!path.exists()) return new ArrayList<>();
 
         Log.d("REPO", "current path: " + path.getPath());
-        ArrayList<File> files = new ArrayList<File>(Arrays.asList(path.listFiles((FileFilter) FileFilterUtils.directoryFileFilter())));
-        files.addAll( new ArrayList<File>((List<File>)FileUtils.listFiles(path, new String[] {"gpg"}, false)));
+        ArrayList<File> files = new ArrayList<>(Arrays.asList(path.listFiles((FileFilter) FileFilterUtils.directoryFileFilter())));
+        files.addAll(new ArrayList<>((List<File>) FileUtils.listFiles(path, new String[]{"gpg"}, false)));
 
-        return new ArrayList<File>(files);
+        return new ArrayList<>(files);
     }
 
     /**
@@ -183,9 +182,9 @@ public class PasswordRepository {
         //We need to recover the passwords then parse the files
         ArrayList<File> passList = getFilesList(path);
 
-        if (passList.size() == 0) return new ArrayList<PasswordItem>();
+        if (passList.size() == 0) return new ArrayList<>();
 
-        ArrayList<PasswordItem> passwordList = new ArrayList<PasswordItem>();
+        ArrayList<PasswordItem> passwordList = new ArrayList<>();
 
         for (File file : passList) {
             if (file.isFile()) {
@@ -203,7 +202,7 @@ public class PasswordRepository {
 
     /**
      * Sets the git user name
-     * @param String username username
+     * @param username username
      */
     public static void setUserName(String username) {
         setStringConfig("user", null, "name", username);
@@ -211,7 +210,7 @@ public class PasswordRepository {
 
     /**
      * Sets the git user email
-     * @param String email email
+     * @param email email
      */
     public static void setUserEmail(String email) {
         setStringConfig("user", null, "email", email);
@@ -219,10 +218,10 @@ public class PasswordRepository {
 
     /**
      * Sets a git config value
-     * @param String section config section name
-     * @param String subsection config subsection name
-     * @param String name config name
-     * @param String value the value to be set
+     * @param section config section name
+     * @param subsection config subsection name
+     * @param name config name
+     * @param value the value to be set
      */
     private static void setStringConfig(String section, String subsection, String name, String value) {
         if (isInitialized()) {