1 /*
2 * Copyright 2013 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 
18 package com.example.android.navigationdrawer;
19 
20 import android.app.Activity;
21 import android.content.Intent;
22 import android.content.res.Resources;
23 import android.os.Bundle;
24 import android.view.View;
25 import android.view.ViewGroup;
26 import android.view.ViewTreeObserver;
27 import android.widget.AdapterView;
28 import android.widget.BaseAdapter;
29 import android.widget.GridView;
30 import android.widget.TextView;
31 
32 /**
33  * A simple launcher activity offering access to the individual samples in this project.
34  */
35 public class MainActivity extends Activity implements AdapterView.OnItemClickListener {
36     private Sample[] mSamples;
37     private GridView mGridView;
38 
onCreate(Bundle savedInstanceState)39     protected void onCreate(Bundle savedInstanceState) {
40         super.onCreate(savedInstanceState);
41         setContentView(R.layout.activity_main);
42 
43         // Prepare list of samples in this dashboard.
44         mSamples = new Sample[]{
45             new Sample(R.string.navigationdraweractivity_title, R.string.navigationdraweractivity_description,
46                     NavigationDrawerActivity.class),
47         };
48 
49         // Prepare the GridView
50         mGridView = (GridView) findViewById(android.R.id.list);
51         mGridView.setAdapter(new SampleAdapter());
52         mGridView.setOnItemClickListener(this);
53     }
54 
55     @Override
onItemClick(AdapterView<?> container, View view, int position, long id)56     public void onItemClick(AdapterView<?> container, View view, int position, long id) {
57         startActivity(mSamples[position].intent);
58     }
59 
60     private class SampleAdapter extends BaseAdapter {
61         @Override
getCount()62         public int getCount() {
63             return mSamples.length;
64         }
65 
66         @Override
getItem(int position)67         public Object getItem(int position) {
68             return mSamples[position];
69         }
70 
71         @Override
getItemId(int position)72         public long getItemId(int position) {
73             return mSamples[position].hashCode();
74         }
75 
76         @Override
getView(int position, View convertView, ViewGroup container)77         public View getView(int position, View convertView, ViewGroup container) {
78             if (convertView == null) {
79                 convertView = getLayoutInflater().inflate(R.layout.sample_dashboard_item,
80                         container, false);
81             }
82 
83             ((TextView) convertView.findViewById(android.R.id.text1)).setText(
84                     mSamples[position].titleResId);
85             ((TextView) convertView.findViewById(android.R.id.text2)).setText(
86                     mSamples[position].descriptionResId);
87             return convertView;
88         }
89     }
90 
91     private class Sample {
92         int titleResId;
93         int descriptionResId;
94         Intent intent;
95 
Sample(int titleResId, int descriptionResId, Intent intent)96         private Sample(int titleResId, int descriptionResId, Intent intent) {
97             this.intent = intent;
98             this.titleResId = titleResId;
99             this.descriptionResId = descriptionResId;
100         }
101 
Sample(int titleResId, int descriptionResId, Class<? extends Activity> activityClass)102         private Sample(int titleResId, int descriptionResId,
103                 Class<? extends Activity> activityClass) {
104             this(titleResId, descriptionResId,
105                     new Intent(MainActivity.this, activityClass));
106         }
107     }
108 }
109