6.listview显示不用条目

文件夹页面

布局只有一个listview，可以继承listactivity，这样少写一个布局文件
tool:
  1. 	 * @param index 箱子的索引值
  2. 	 * @return
  3. 	 * 对应的uri 或null 
  4. 	 */
  5. 	public static  Uri getUriFromIndex(int index){
  6. 		switch (index) {
  7. 		case 0:
  8. 			return MyConstants.URI_INBOX;
  9. 		case 1:
  10. 			return MyConstants.URI_OUTBOX;
  11. 		case 2:
  12. 			return MyConstants.URI_DRAFT;
  13. 		case 3:
  14. 			return MyConstants.URI_SENT;
  16. 		}
  17. 		return null;
  18. 	}
FolderUI :可以用%来改变条目的颜色
  1. public class FolderUI extends ListActivity implements OnItemClickListener{
  2. 	
  3. 	private ListView listView;
  4. 	
  5. 	private String [] names={"收件箱","发件箱","草稿箱","已发送"};
  6. 	
  7. 	private int[] iconIds={R.drawable.a_f_inbox,R.drawable.a_f_outbox,R.drawable.a_f_draft,R.drawable.a_f_sent};
  8. 	
  9. 	private int [] counts=new int[4];
  11. 	public Context ctx;
  12. 	
  13. 	@Override
  14. 	protected void onCreate(Bundle savedInstanceState) {
  15. 		super.onCreate(savedInstanceState);
  16. 		
  17. 		ctx = this;
  18. 		listView = getListView();
  19. 		adapter = new FolderListAdapter();
  20. 		listView.setAdapter(adapter);
  21. 		
  22. 		prepareData();
  23. 		
  24. 		listView.setOnItemClickListener(this);
  25. 		
  26. 	}
  27. 	
  28. 	private void prepareData() {
  29. 		MyQueryHandler myQueryHandler = new MyQueryHandler(getContentResolver());
  30. 		
  31. 		for (int i = 0; i <4; i++) {
  32. 			
  33. 			myQueryHandler.startQuery(i, null, Tools.getUriFromIndex(i), new String[]{" count(*) "}, null, null, null);
  34. 		}
  35. 		
  36. 		myQueryHandler.setOnCursorChangedListener(new MyQueryHandler.IOnCursorChangedListener() {
  37. 			
  38. 			@Override
  39. 			public void onCursorChanged(int token, Object cookie, Cursor cursor) {
  40. 				//移动至第一行
  41. 				cursor.moveToFirst();
  42. 				// 获得短信的个数
  43. 				int count = cursor.getInt(0); // 仅查询 短信的条数，仅返回一列 
  44. 				// 以 token 为counts的下标，存短信个数
  45. 				counts[token] = count;
  46. 				//刷新listView 
  47. 				adapter.notifyDataSetChanged();
  48. 			}
  49. 		});
  50. 	}
  52. 	private FolderListAdapter adapter;
  53. 	
  54. 	class FolderListAdapter extends BaseAdapter{
  56. 		@Override
  57. 		public int getCount() {
  58. 			return names.length;
  59. 		}
  61. 		@Override
  62. 		public Object getItem(int position) {
  63. 			return null;
  64. 		}
  66. 		@Override
  67. 		public long getItemId(int position) {
  68. 			return 0;
  69. 		}
  71. 		@Override
  72. 		public View getView(int position, View convertView, ViewGroup parent) {
  73. 			View  view;
  74. 			if(convertView == null){
  75. 				view = View.inflate(ctx, R.layout.list_item_folder, null);
  76. 			}else{
  77. 				view = convertView;
  78. 			}
  79. 			
  80. 			ImageView icon = (ImageView) view.findViewById(R.id.iv_icon_folder);
  81. 			TextView name = (TextView) view.findViewById(R.id.tv_name_folder);
  82. 			TextView count = (TextView) view.findViewById(R.id.tv_count_folder);
  83. 			
  84. 			icon.setBackgroundResource(iconIds[position]);
  85. 			name.setText(names[position]);
  86. 			count.setText(""+counts[position]);
  87. 			
  88. 			// 改变item的背景
  89. 			if(position%2 == 0){
  90. 				view.setBackgroundColor(Color.WHITE);
  91. 			}else{
  92. 				view.setBackgroundColor(Color.GRAY);
  93. 			}
  95. 			return view;
  96. 		}
  97. 		
  98. 	}
  100. 	@Override
  101. 	/**
  102. 	 * 响应listview 条目点击事件
  103. 	 */
  104. 	public void onItemClick(AdapterView<?> parent, View view, int position,
  105. 			long id) {
  106. 		
  107. 		Intent intent = new Intent(this,FolderDetail.class);
  108. 		
  109. 		intent.putExtra("position", position);
  110. 		startActivity(intent);
  111. 		
  112. 	}
  114. }
文件夹详情页：listview的条目都带着上面的一条的，解决方法
  1. 每个条目判断和上一个条目是否是同一天，不是显示，是隐藏，但是会不停的判读
  2. 在获取日期信息的时候保存到集合，不是同一天就保存，用第二种，缺点一次性全部取出效率不高

  1. public class FolderDetail extends Activity implements OnClickListener{
  2. 	
  3. 	private ListView listView;
  4. 	
  5. 	/**
  6. 	 * 在文件夹页面，点击listView的位置
  7. 	 */
  8. 	private int position;
  9. 	
  10. 	@Override
  11. 	protected void onCreate(Bundle savedInstanceState) {
  12. 		super.onCreate(savedInstanceState);
  13. 		
  14. 		position = getIntent().getIntExtra("position", 0);
  15. 		
  16. 		setContentView(R.layout.activity_folder_detail);
  17. 		
  18. 		findViewById(R.id.btn_send).setOnClickListener(this);
  19. 		
  20. 		listView  = (ListView) findViewById(R.id.lv_folder_detail);
  21. 		adapter = new FolderDetailListAdapter(this, null);
  22. 		listView.setAdapter(adapter);
  23. 		
  24. 		showPositionSet = new HashSet<Integer>();
  25. 		
  26. 		prepareData();
  27. 	
  28. 	}
  29. 	
  30. 	/**
  31. 	 * 要查询的列
  32. 	 */
  33. 	private String[] projection={
  34. 			"body","_id","address","date"
  35. 	};
  36. 	
  37. 	/**
  38. 	 * 短信内容所在列的索引值 为 0
  39. 	 */
  40. 	private final int INDEX_BODY = 0;
  41. 	/**
  42. 	 * 短信联系人电话所在列的索引值 为 3
  43. 	 */
  44. 	private final int INDEX_ADDRESS = 2;
  45. 	/**
  46. 	 * 短信日期所在列的索引值 为 4
  47. 	 */
  48. 	private final int INDEX_DATE = 3;
  49. 	
  50. 	
  51. 	private void prepareData() {
  52. 		MyQueryHandler myQueryHandler =new MyQueryHandler(getContentResolver());
  53. 		myQueryHandler.startQuery(99, adapter, Tools.getUriFromIndex(position),
  54. 				projection, null, null, " date desc");
  55. 		
  56. 		myQueryHandler.setOnCursorChangedListener(new MyQueryHandler.IOnCursorChangedListener() {
  57. 			
  58. 			@Override
  59. 			public void onCursorChanged(int token, Object cookie, Cursor cursor) {
  60. 				//遍历curosr 将需要显示标题的条目的位置，保存在 showPositionSet 
  61. 				
  62. 				cursor.moveToPosition(-1);// 将cursor 移动到-1 的位置，方便遍历cursor
  63. 				
  64. 				showPositionSet.clear(); // 清空集合
  65. 				
  66. 				long lastDay=0;
  67. 				long thisDay=0;
  68. 				
  69. 				while(cursor.moveToNext()){
  70. 					thisDay=cursor.getLong(INDEX_DATE);
  71. 					
  72. 					if(!isSameToday(lastDay, thisDay)){ // 如果二个时间表示的不是同一天
  73. 						// 将当前cursor 的行数，保存至集合
  74. 						
  75. 						showPositionSet.add(cursor.getPosition());
  76. 					}
  77. 					
  78. 					lastDay = thisDay;
  79. 				}
  80. 				
  81. 				// 刷新listView 
  82. 				adapter.notifyDataSetChanged();
  83. 			}
  84. 		});
  85. 	}
  87.     /**
  88.      * @return true 如果 二人长型数字，表示的是同一天
  89.      */
  90.     public boolean isSameToday(long lastDay,long thisDay) {
  91.         Time time = new Time();
  92.         time.set(lastDay);
  93.         
  94.         int thenYear = time.year;
  95.         int thenMonth = time.month;
  96.         int thenMonthDay = time.monthDay;
  98.         time.set(thisDay);
  99.         return (thenYear == time.year)
  100.                 && (thenMonth == time.month) 
  101.                 && (thenMonthDay == time.monthDay);
  102.     }
  103. 	
  104. 	
  105. 	/**
  106. 	 * 应该显示标题的位置的集合
  107. 	 */
  108. 	private HashSet<Integer> showPositionSet;
  109. 	
  110. 	
  111. 	private FolderDetailListAdapter adapter ;
  113. 	class FolderDetailListAdapter extends CursorAdapter{
  115. 		public FolderDetailListAdapter(Context context, Cursor c) {
  116. 			super(context, c);
  117. 		}
  119. 		@Override
  120. 		public View newView(Context context, Cursor cursor, ViewGroup parent) {
  121. 			View view = View.inflate(context, R.layout.list_item_folder_detail, null);
  122. 			FolderDetailViewHolder vh = new FolderDetailViewHolder();
  123. 			
  124. 			vh.title = (TextView) view.findViewById(R.id.tv_title_list_item);
  125. 			
  126. 			vh.face = (ImageView) view.findViewById(R.id.iv_face_list_item);
  127. 			vh.address = (TextView) view.findViewById(R.id.tv_address_list_item);
  128. 			vh.body = (TextView) view.findViewById(R.id.tv_body_list_item);
  129. 			vh.date = (TextView) view.findViewById(R.id.tv_date_list_item);
  130. 			
  131. 			view.setTag(vh);
  132. 			
  133. 			return view;
  134. 		}
  136. 		@Override
  137. 		public void bindView(View view, Context context, Cursor cursor) {
  138. 			FolderDetailViewHolder vh = (FolderDetailViewHolder) view.getTag();
  139. 			
  140. 			//TODO  
  141. 			//设置短信内容
  142. 			vh.body.setText(cursor.getString(INDEX_BODY));
  143. 			
  144. 			//设置时间
  145. 			long when = cursor.getLong(INDEX_DATE);
  146. 			String dateStr;
  147. 			if(DateUtils.isToday(when)){
  148. 				dateStr = DateFormat.getTimeFormat(context).format(when);
  149. 			}else{
  150. 				dateStr = DateFormat.getDateFormat(context).format(when);
  151. 			}
  152. 			vh.date.setText(dateStr);
  153. 			
  154. 			//设置联系人的名
  155. 			String number = cursor.getString(INDEX_ADDRESS);
  156. 			String name = Tools.findNameByNumber(context, number);
  157. 			if(name == null){//无此联系人
  158. 				vh.address.setText(number);
  159. 			}else{
  160. 				vh.address.setText(name);
  161. 			}
  162. 			
  163. 			// 设置头像
  164. 			
  165. 			int contactId = Tools.findIDByNumber(context, number);
  166. 			if(contactId == -1){ // 无此联系人
  167. 				vh.face.setBackgroundResource(R.drawable.ic_unknow_contact_picture);
  168. 			}else{
  169. 				Bitmap bitmap = Tools.getFaceById(context, ""+contactId);
  170. 				if(bitmap ==null){//联系人，无头像
  171. 					vh.face.setBackgroundResource(R.drawable.ic_contact_picture);
  172. 				}else{
  173. 					vh.face.setBackgroundDrawable(new BitmapDrawable(bitmap));
  174. 				}
  175. 			}
  176. 			
  177. 			// 设置标题 
  178. 			
  179. 			if(showPositionSet.contains(cursor.getPosition())){ // 如果集合中包含此行，那么，就显示标题 ，
  180. 				
  181. 				vh.title.setText(DateFormat.getDateFormat(context).format(when));
  182. 				
  183. 				vh.title.setVisibility(View.VISIBLE);
  184. 			}else{
  185. 				// 否则，就隐藏标题 
  186. 				vh.title.setVisibility(View.GONE);
  187. 			}
  188. 			
  189. 			
  190. 		}
  191. 		
  192. 	}
  193. 	
  194. 	class FolderDetailViewHolder{
  195. 		
  196. 		public TextView title;
  197. 		
  198. 		public ImageView face;
  199. 		public TextView address;
  200. 		public TextView body;
  201. 		public TextView date;
  202. 		
  203. 	}
  204. 	
  205. 	
  206. 	@Override
  207. 	/**
  208. 	 * 响应新建信息的点击事件
  209. 	 */
  210. 	public void onClick(View v) {
  211. 		
  212. 		Intent intent = new Intent(this,NewMessageUI.class);
  213. 		startActivity(intent);
  214. 	}
  216. }





posted @ 2015-11-25 16:01  梦和远方  阅读(206)  评论(0)  编辑  收藏  举报