filter icons && NotificationListLoaderManager

app/src/main/java/net/headlezz/notificationlogger/notificationlist/NotificationListFragment.java

@@ -4,12 +4,12 @@ import android.database.Cursor;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
-import android.support.v4.app.LoaderManager;
-import android.support.v4.content.CursorLoader;
-import android.support.v4.content.Loader;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -22,9 +22,7 @@ import butterknife.Bind;
 import butterknife.ButterKnife;
 import timber.log.Timber;
 
-public class NotificationListFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor>, NotificationListAdapter.NotificationClickListener {
+public class NotificationListFragment extends Fragment implements NotificationListLoaderCallbacks.NotificationListView, NotificationListAdapter.NotificationClickListener {
-
-    final int LOADER_ID = 124;
 
     @Bind(R.id.nList_emptyView)
     View mEmptyView;
@@ -33,6 +31,18 @@ public class NotificationListFragment extends Fragment implements LoaderManager.
     RecyclerView mNotificationList;
 
     private NotificationListAdapter mAdapter;
+    private boolean isFiltered = false;
+    private NotificationListLoaderManager mLoaderManager;
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        setHasOptionsMenu(true);
+        super.onCreate(savedInstanceState);
+        mLoaderManager = new NotificationListLoaderManager(
+                getContext(),
+                getLoaderManager(),
+                this);
+    }
 
     @Nullable
     @Override
@@ -40,7 +50,6 @@ public class NotificationListFragment extends Fragment implements LoaderManager.
         View view = inflater.inflate(R.layout.notification_list_fragment, container, false);
         ButterKnife.bind(this, view);
         mNotificationList.setLayoutManager(new LinearLayoutManager(getContext()));
-
         return view;
     }
 
@@ -50,50 +59,57 @@ public class NotificationListFragment extends Fragment implements LoaderManager.
         mAdapter = new NotificationListAdapter(getContext(), null);
         mAdapter.setNotificationClickListener(this);
         mNotificationList.setAdapter(mAdapter);
-        getLoaderManager().initLoader(LOADER_ID, Bundle.EMPTY, this);
+        mLoaderManager.loadNotificationsUnfiltered();
     }
 
     @Override
-    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-        Timber.d("Loader created.");
+        super.onCreateOptionsMenu(menu, inflater);
-        return new CursorLoader(
+        inflater.inflate(R.menu.notification_list_frag, menu);
-                getContext(),
+        if (isFiltered)
-                Logged_notificationTable.CONTENT_URI,
+            menu.findItem(R.id.menu_filter).setVisible(false);
-                null,
+        else
-                null,
+            menu.findItem(R.id.menu_clear_filter).setVisible(false);
-                null,
-                Logged_notificationTable.FIELD_DATE + " DESC"
-        );
     }
 
     @Override
-    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
+    public boolean onOptionsItemSelected(MenuItem item) {
-        Timber.d("Loader finished. " + data.getCount() + " items.");
+        switch (item.getItemId()) {
-        mAdapter.changeCursor(data);
+            case R.id.menu_filter:
-        checkIfEmpty();
+                mLoaderManager.loadNotificationsUnfiltered();
+                setIsFiltered(true);
+                return true;
+            case R.id.menu_clear_filter:
+                mLoaderManager.loadNotificationsUnfiltered();
+                setIsFiltered(false);
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    public void setIsFiltered(boolean filtered) {
+        isFiltered = filtered;
+        if (getActivity() != null)
+            getActivity().supportInvalidateOptionsMenu();
     }
 
     @Override
-    public void onLoaderReset(Loader<Cursor> loader) {
+    public void onChangeCursor(Cursor cursor) {
-        Timber.d("Loader reset.");
+        mAdapter.changeCursor(cursor);
-        mAdapter.changeCursor(null);
+        if (mAdapter.getItemCount() == 0) {
-        checkIfEmpty();
-    }
-
-    private void checkIfEmpty() {
-        if(mAdapter.getItemCount() == 0) {
-            mEmptyView.setVisibility(View.VISIBLE);
             mNotificationList.setVisibility(View.GONE);
+            mEmptyView.setVisibility(View.VISIBLE);
         } else {
-            mEmptyView.setVisibility(View.GONE);
             mNotificationList.setVisibility(View.VISIBLE);
+            mEmptyView.setVisibility(View.GONE);
         }
     }
 
     @Override
     public void onNotificationClick(long id) {
         String qry = Logged_notificationTable.FIELD__ID + " = ? ";
-        String[] args = { String.valueOf(id) };
+        String[] args = {String.valueOf(id)};
         Cursor cursor = getContext().getContentResolver().query(Logged_notificationTable.CONTENT_URI, null, qry, args, null);
         LoggedNotification notification = Logged_notificationTable.getRow(cursor, true);
         Timber.e(notification.title);

app/src/main/java/net/headlezz/notificationlogger/notificationlist/NotificationListLoaderCallbacks.java

@@ -0,0 +1,53 @@
+package net.headlezz.notificationlogger.notificationlist;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.support.v4.app.LoaderManager;
+import android.support.v4.content.CursorLoader;
+import android.support.v4.content.Loader;
+
+import net.headlezz.notificationlogger.logger.Logged_notificationTable;
+
+import timber.log.Timber;
+
+public class NotificationListLoaderCallbacks implements LoaderManager.LoaderCallbacks<Cursor> {
+
+    public interface NotificationListView {
+        void onChangeCursor(Cursor cursor);
+    }
+
+    private Context mContext;
+    private NotificationListView mView;
+
+    public NotificationListLoaderCallbacks(Context context, NotificationListView view) {
+        mContext = context;
+        mView = view;
+    }
+
+    @Override
+    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
+        Timber.d("Loader created.");
+        return new CursorLoader(
+                mContext,
+                Logged_notificationTable.CONTENT_URI,
+                null,
+                null,
+                null,
+                Logged_notificationTable.FIELD_DATE + " DESC"
+        );
+    }
+
+    @Override
+    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
+        Timber.d("Loader finished. " + data.getCount() + " items.");
+        mView.onChangeCursor(data);
+    }
+
+    @Override
+    public void onLoaderReset(Loader<Cursor> loader) {
+        Timber.d("Loader reset.");
+        mView.onChangeCursor(null);
+    }
+
+}

app/src/main/java/net/headlezz/notificationlogger/notificationlist/NotificationListLoaderManager.java

@@ -0,0 +1,23 @@
+package net.headlezz.notificationlogger.notificationlist;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.support.v4.app.LoaderManager;
+
+public class NotificationListLoaderManager {
+
+    final int LOADER_ID = 124;
+
+    LoaderManager mLoaderManager;
+    NotificationListLoaderCallbacks mLoaderCallbacks;
+
+    public NotificationListLoaderManager(Context context, LoaderManager loaderManager, NotificationListLoaderCallbacks.NotificationListView notificationListView) {
+        mLoaderManager = loaderManager;
+        mLoaderCallbacks = new NotificationListLoaderCallbacks(context, notificationListView);
+    }
+
+    void loadNotificationsUnfiltered() {
+        mLoaderManager.restartLoader(LOADER_ID, Bundle.EMPTY, mLoaderCallbacks);
+    }
+
+}

app/src/main/res/menu/main_activity.xml

@@ -5,6 +5,5 @@
         android:id="@+id/menu_settings"
         android:orderInCategory="100"
         android:title="@string/menu_item_settings"
-        app:showAsAction="never"
+        app:showAsAction="never" />
-        />
 </menu>

app/src/main/res/menu/notification_list_frag.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/menu_filter"
+        android:orderInCategory="101"
+        android:title="@string/menu_item_filter"
+        app:showAsAction="never" />
+    <item
+        android:id="@+id/menu_clear_filter"
+        android:orderInCategory="102"
+        android:title="@string/menu_item_clear_filter"
+        app:showAsAction="never" />
+</menu>

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

@@ -55,6 +55,8 @@
     <string name="notification_small_icon_cd">Notification small icon</string>
     <string name="app_icon_cd">Application icon for %s</string>
     <string name="notification_info_dialog_app_info_error">Failed to display app info.</string>
+    <string name="menu_item_filter">Filter</string>
+    <string name="menu_item_clear_filter">Clear filter</string>
 
     <string-array name="create_categories">
         <item>Alarm</item>