1/*
2 * Copyright (C) 2007 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
17package android.widget.gridview;
18
19import com.android.frameworks.coretests.R;
20
21import android.app.Activity;
22import android.content.Context;
23import android.os.Bundle;
24import android.os.Handler;
25import android.view.View;
26import android.view.ViewGroup;
27import android.view.LayoutInflater;
28import android.widget.AdapterView;
29import android.widget.BaseAdapter;
30import android.widget.GridView;
31import android.widget.TextView;
32
33import java.util.Random;
34
35/**
36 * Exercises change notification in a list
37 */
38public class GridThrasher extends Activity implements AdapterView.OnItemSelectedListener
39{
40    Handler mHandler = new Handler();
41    ThrashListAdapter mAdapter;
42    Random mRandomizer = new Random();
43    TextView mText;
44
45    Runnable mThrash = new Runnable() {
46        public void run() {
47            mAdapter.bumpVersion();
48            mHandler.postDelayed(mThrash, 500);
49        }
50    };
51
52    private class ThrashListAdapter extends BaseAdapter {
53        private LayoutInflater mInflater;
54
55        /**
56         * Our data, part 1.
57         */
58        private String[] mTitles = new String[100];
59
60        /**
61         * Our data, part 2.
62         */
63        private int[] mVersion = new int[100];
64
65        public ThrashListAdapter(Context context) {
66            mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
67            mTitles = new String[100];
68            mVersion = new int[100];
69
70            int i;
71            for (i=0; i<100; i++) {
72                mTitles[i] = "[" + i + "]";
73                mVersion[i] = 0;
74            }
75        }
76
77        public int getCount() {
78            return mTitles.length;
79        }
80
81        public Object getItem(int position) {
82            return position;
83        }
84
85        public long getItemId(int position) {
86            return position;
87        }
88
89        public View getView(int position, View convertView, ViewGroup parent) {
90            TextView view;
91
92            if (convertView == null) {
93                view = (TextView) mInflater.inflate(android.R.layout.simple_list_item_1, null);
94            } else {
95                view = (TextView) convertView;
96            }
97            view.setText(mTitles[position] + " " + mVersion[position]);
98            return view;
99        }
100
101
102        public void bumpVersion() {
103            int position = mRandomizer.nextInt(getCount());
104            mVersion[position]++;
105            notifyDataSetChanged();
106        }
107
108
109    }
110
111    @Override
112    public void onCreate(Bundle icicle)
113    {
114        super.onCreate(icicle);
115
116        setContentView(R.layout.grid_thrasher);
117
118        mText = (TextView) findViewById(R.id.text);
119        mAdapter = new ThrashListAdapter(this);
120        GridView g = (GridView) findViewById(R.id.grid);
121        g.setAdapter(mAdapter);
122
123        mHandler.postDelayed(mThrash, 5000);
124
125        g.setOnItemSelectedListener(this);
126    }
127
128    public void onItemSelected(AdapterView parent, View v, int position, long id) {
129        mText.setText("Position " + position);
130    }
131
132    public void onNothingSelected(AdapterView parent) {
133        mText.setText("Nothing");
134    }
135}
136