| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.frameworktest.listview; |
| |
| import com.android.frameworktest.R; |
| |
| import android.app.ListActivity; |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.LayoutInflater; |
| import android.widget.AdapterView; |
| import android.widget.BaseAdapter; |
| import android.widget.TextView; |
| |
| import java.util.Random; |
| |
| /** |
| * Exercises change notification in a list |
| */ |
| public class ListThrasher extends ListActivity implements AdapterView.OnItemSelectedListener { |
| Handler mHandler = new Handler(); |
| ThrashListAdapter mAdapter; |
| Random mRandomizer = new Random(); |
| TextView mText; |
| |
| Runnable mThrash = new Runnable() { |
| public void run() { |
| mAdapter.bumpVersion(); |
| mHandler.postDelayed(mThrash, 500); |
| } |
| }; |
| |
| private class ThrashListAdapter extends BaseAdapter { |
| private LayoutInflater mInflater; |
| |
| /** |
| * Our data, part 1. |
| */ |
| private String[] mTitles = new String[100]; |
| |
| /** |
| * Our data, part 2. |
| */ |
| private int[] mVersion = new int[100]; |
| |
| public ThrashListAdapter(Context context) { |
| mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| mTitles = new String[100]; |
| mVersion = new int[100]; |
| |
| int i; |
| for (i = 0; i < 100; i++) { |
| mTitles[i] = "[" + i + "]"; |
| mVersion[i] = 0; |
| } |
| } |
| |
| public int getCount() { |
| return mTitles.length; |
| } |
| |
| public Object getItem(int position) { |
| return position; |
| } |
| |
| public long getItemId(int position) { |
| return position; |
| } |
| |
| public View getView(int position, View convertView, ViewGroup parent) { |
| TextView view; |
| |
| if (convertView == null) { |
| view = (TextView) mInflater.inflate(android.R.layout.simple_list_item_1, null); |
| } else { |
| view = (TextView) convertView; |
| } |
| view.setText(mTitles[position] + " " + mVersion[position]); |
| return view; |
| } |
| |
| |
| public void bumpVersion() { |
| int position = mRandomizer.nextInt(getCount()); |
| mVersion[position]++; |
| notifyDataSetChanged(); |
| } |
| |
| |
| } |
| |
| @Override |
| public void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| |
| setContentView(R.layout.list_thrasher); |
| |
| mText = (TextView) findViewById(R.id.text); |
| mAdapter = new ThrashListAdapter(this); |
| setListAdapter(mAdapter); |
| |
| mHandler.postDelayed(mThrash, 5000); |
| |
| getListView().setOnItemSelectedListener(this); |
| } |
| |
| public void onItemSelected(AdapterView parent, View v, int position, long id) { |
| mText.setText("Position " + position); |
| } |
| |
| public void onNothingSelected(AdapterView parent) { |
| mText.setText("Nothing"); |
| } |
| } |