Adding Search

app/src/main/java/dragosholban/com/timezoneconverter/SelectTimezonesActivity.java

@@ -1,12 +1,17 @@
 package dragosholban.com.timezoneconverter;
 
 import android.content.Intent;
+import android.support.v4.view.MenuItemCompat;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.widget.SearchView;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
+import android.widget.Filter;
 import android.widget.ListView;
 
 import java.util.ArrayList;
@@ -15,7 +20,7 @@
 
 public class SelectTimezonesActivity extends AppCompatActivity {
     ArrayList<String> selectedTimezones = new ArrayList<>();
-    ArrayAdapter<String> adapter;
+    TimeZoneAdapter adapter;
     ArrayList<String> timezones;
     ListView listView;
     boolean showAll = true;
@@ -33,7 +38,7 @@ protected void onCreate(Bundle savedInstanceState) {
         timezones = new ArrayList<>(Arrays.asList(TimeZone.getAvailableIDs()));
 
         listView = findViewById(R.id.listView);
-        adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_multiple_choice, android.R.id.text1, timezones);
+        adapter = new TimeZoneAdapter(this, android.R.layout.simple_list_item_multiple_choice, android.R.id.text1, timezones);
         listView.setAdapter(adapter);
 
         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@@ -97,4 +102,33 @@ private void checkSelectedTimezones() {
             }
         }
     }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.options_menu, menu);
+
+        MenuItem searchItem = menu.findItem(R.id.action_search);
+        SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
+
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String s) {
+                return false;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String s) {
+                adapter.getFilter().filter(s, new Filter.FilterListener() {
+                    @Override
+                    public void onFilterComplete(int i) {
+                        checkSelectedTimezones();
+                    }
+                });
+
+                return true;
+            }
+        });
+
+        return true;
+    }
 }

app/src/main/java/dragosholban/com/timezoneconverter/TimeZoneActivity.java

@@ -1,8 +1,12 @@
 package dragosholban.com.timezoneconverter;
 
 import android.content.Intent;
+import android.support.v4.view.MenuItemCompat;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.widget.SearchView;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
@@ -13,6 +17,7 @@
 import java.util.TimeZone;
 
 public class TimeZoneActivity extends AppCompatActivity {
+    TimeZoneAdapter adapter;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -21,7 +26,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
         ListView listView = findViewById(R.id.listView);
         final ArrayList<String> timezones = new ArrayList<>(Arrays.asList(TimeZone.getAvailableIDs()));
-        ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, android.R.id.text1, timezones);
+        adapter = new TimeZoneAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1, timezones);
         listView.setAdapter(adapter);
 
         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@@ -34,4 +39,28 @@ public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
             }
         });
     }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.options_menu, menu);
+
+        MenuItem searchItem = menu.findItem(R.id.action_search);
+        SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
+
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String s) {
+                return false;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String s) {
+                adapter.getFilter().filter(s);
+
+                return true;
+            }
+        });
+
+        return true;
+    }
 }

app/src/main/java/dragosholban/com/timezoneconverter/TimeZoneAdapter.java

@@ -0,0 +1,61 @@
+package dragosholban.com.timezoneconverter;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.widget.ArrayAdapter;
+import android.widget.Filter;
+
+import java.util.ArrayList;
+
+public class TimeZoneAdapter extends ArrayAdapter<String> {
+
+    private ArrayList<String> original;
+    private Filter filter;
+
+    public TimeZoneAdapter(@NonNull Context context, int resource, int textViewResourceId, @NonNull ArrayList<String> objects) {
+        super(context, resource, textViewResourceId, objects);
+        original = new ArrayList<>(objects);
+    }
+
+    @NonNull
+    @Override
+    public Filter getFilter() {
+        return new TimeZoneFilter();
+    }
+
+    private class TimeZoneFilter extends Filter {
+
+        @Override
+        protected FilterResults performFiltering(CharSequence charSequence) {
+            FilterResults results = new FilterResults();
+            ArrayList<String> filtered = new ArrayList<>();
+            String search = charSequence.toString().toLowerCase();
+
+            if (search == null || search.length() == 0) {
+                filtered = new ArrayList<>(original);
+            } else {
+                for (int i = 0; i < original.size(); i++) {
+                    if (original.get(i).toLowerCase().contains(charSequence)) {
+                        filtered.add(original.get(i));
+                    }
+                }
+            }
+
+            results.values = filtered;
+            results.count = filtered.size();
+
+            return results;
+        }
+
+        @Override
+        protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
+            ArrayList<String> items = (ArrayList<String>) filterResults.values;
+            clear();
+            for (int i = 0; i < items.size(); i++) {
+                add(items.get(i));
+            }
+
+            notifyDataSetChanged();
+        }
+    }
+}

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

@@ -0,0 +1,9 @@
+<?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/action_search"
+        android:icon="@android:drawable/ic_menu_search"
+        app:showAsAction="ifRoom|collapseActionView"
+        app:actionViewClass="android.support.v7.widget.SearchView"
+        android:title="@string/app_name" />
+</menu>