1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.example.android.support.design.widget;
18 
19 import com.example.android.support.design.R;
20 
21 import android.os.Bundle;
22 import android.support.annotation.LayoutRes;
23 import android.support.design.widget.NavigationView;
24 import android.support.v7.app.AppCompatActivity;
25 import android.view.MenuItem;
26 import android.widget.TextView;
27 import android.widget.Toast;
28 
29 public abstract class NavigationViewUsageBase extends AppCompatActivity {
30 
31     private TextView mTextMessage;
32 
33     @Override
onCreate(Bundle savedInstanceState)34     protected void onCreate(Bundle savedInstanceState) {
35         super.onCreate(savedInstanceState);
36         setContentView(getLayout());
37 
38         mTextMessage = (TextView) findViewById(R.id.message);
39 
40         // Menu
41         NavigationView navigation = (NavigationView) findViewById(R.id.navigation);
42         navigation.setNavigationItemSelectedListener(getNavigationItemSelectedListener());
43         navigation.inflateHeaderView(R.layout.design_navigation_header);
44     }
45 
46     @LayoutRes
getLayout()47     protected abstract int getLayout();
48 
getNavigationItemSelectedListener()49     protected abstract NavigationView.OnNavigationItemSelectedListener getNavigationItemSelectedListener();
50 
handleNavigationItemSelected(MenuItem item)51     protected boolean handleNavigationItemSelected(MenuItem item) {
52         switch (item.getItemId()) {
53             case R.id.navigation_item_1:
54                 mTextMessage.setText("1");
55                 return true;
56             case R.id.navigation_item_2:
57                 mTextMessage.setText("2");
58                 return true;
59             case R.id.navigation_item_3:
60                 mTextMessage.setText("3");
61                 return true;
62             case R.id.navigation_sub_item_1:
63                 showToast(R.string.navigation_sub_item_1);
64                 return true;
65             case R.id.navigation_sub_item_2:
66                 showToast(R.string.navigation_sub_item_2);
67                 return true;
68             case R.id.navigation_with_icon:
69                 showToast(R.string.navigation_item_with_icon);
70                 return true;
71             case R.id.navigation_without_icon:
72                 showToast(R.string.navigation_item_without_icon);
73                 return true;
74             default:
75                 return false;
76         }
77     }
78 
showToast(int res)79     private void showToast(int res) {
80         Toast.makeText(this, getString(R.string.navigation_message, getString(res)),
81                 Toast.LENGTH_SHORT).show();
82     }
83 
84 }
85