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      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 
     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
     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
     62         public int getCount() {
     63             return mSamples.length;
     64         }
     65 
     66         @Override
     67         public Object getItem(int position) {
     68             return mSamples[position];
     69         }
     70 
     71         @Override
     72         public long getItemId(int position) {
     73             return mSamples[position].hashCode();
     74         }
     75 
     76         @Override
     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 
     96         private Sample(int titleResId, int descriptionResId, Intent intent) {
     97             this.intent = intent;
     98             this.titleResId = titleResId;
     99             this.descriptionResId = descriptionResId;
    100         }
    101 
    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