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代码注释

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zhengzhenzhao
STRIV1 8 months ago
parent 1a1bc9b3ae
commit 06e19e8737
2 changed files with 109 additions and 162 deletions
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28
Contact.java
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@ -26,9 +26,11 @@ import android.util.Log;
import java.util.HashMap; import java.util.HashMap;
public class Contact { public class Contact {
// 用于缓存联系人信息，避免多次查询同一个号码
private static HashMap<String, String> sContactCache; private static HashMap<String, String> sContactCache;
private static final String TAG = "Contact"; private static final String TAG = "Contact"; // 用于Log输出的TAG
// 用于查询联系人名称的SQL条件，依赖于手机号的最小匹配格式
private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'" + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+ " AND " + Data.RAW_CONTACT_ID + " IN " + " AND " + Data.RAW_CONTACT_ID + " IN "
@ -36,38 +38,50 @@ public class Contact {
+ " FROM phone_lookup" + " FROM phone_lookup"
+ " WHERE min_match = '+')"; + " WHERE min_match = '+')";
// 获取某个电话号对应的联系人名称
public static String getContact(Context context, String phoneNumber) { public static String getContact(Context context, String phoneNumber) {
// 如果缓存为空，初始化缓存
if(sContactCache == null) { if(sContactCache == null) {
sContactCache = new HashMap<String, String>(); sContactCache = new HashMap<String, String>();
} }
// 如果缓存中已有该电话号码的联系人信息，直接返回
if(sContactCache.containsKey(phoneNumber)) { if(sContactCache.containsKey(phoneNumber)) {
return sContactCache.get(phoneNumber); return sContactCache.get(phoneNumber);
} }
// 通过PhoneNumberUtils将电话号码转为符合最小匹配格式的号码
String selection = CALLER_ID_SELECTION.replace("+", String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 查询联系人数据库，根据号码查找联系人名称
Cursor cursor = context.getContentResolver().query( Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI, Data.CONTENT_URI, // 数据源：联系人数据
new String [] { Phone.DISPLAY_NAME }, new String[] { Phone.DISPLAY_NAME }, // 查询字段：联系人名称
selection, selection, // 查询条件：号码与条件匹配
new String[] { phoneNumber }, new String[] { phoneNumber }, // 查询参数：电话号码
null); null); // 排序
// 如果查询成功，处理返回结果
if (cursor != null && cursor.moveToFirst()) { if (cursor != null && cursor.moveToFirst()) {
try { try {
// 获取查询到的联系人名称
String name = cursor.getString(0); String name = cursor.getString(0);
// 将查询到的联系人名称缓存起来
sContactCache.put(phoneNumber, name); sContactCache.put(phoneNumber, name);
return name; return name;
} catch (IndexOutOfBoundsException e) { } catch (IndexOutOfBoundsException e) {
// 如果查询结果异常，记录日志
Log.e(TAG, " Cursor get string error " + e.toString()); Log.e(TAG, " Cursor get string error " + e.toString());
return null; return null;
} finally { } finally {
// 最后关闭游标，释放资源
cursor.close(); cursor.close();
} }
} else { } else {
// 如果没有找到匹配的联系人，记录日志并返回null
Log.d(TAG, "No contact matched with number:" + phoneNumber); Log.d(TAG, "No contact matched with number:" + phoneNumber);
return null; return null;
} }
} }
} }

243
Notes.java
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@ -14,211 +14,143 @@
* limitations under the License. * limitations under the License.
*/ */
package net.micode.notes.data; package net.micode.notes.data; // 定义了包名，表示这个类属于 net.micode.notes.data 包
import android.net.Uri; import android.net.Uri; // 导入 Android 的 Uri 类，用于处理内容提供者的 URI
public class Notes {
public class Notes { // Notes 类，主要用于定义与笔记相关的常量和 URI 配置
// 内容提供者的 authority 字符串，用于唯一标识此内容提供者
public static final String AUTHORITY = "micode_notes"; public static final String AUTHORITY = "micode_notes";
// 用于日志输出的标签
public static final String TAG = "Notes"; public static final String TAG = "Notes";
public static final int TYPE_NOTE = 0;
public static final int TYPE_FOLDER = 1; // 定义了笔记、文件夹、系统三种类型的常量
public static final int TYPE_SYSTEM = 2; public static final int TYPE_NOTE = 0; // 笔记类型
public static final int TYPE_FOLDER = 1; // 文件夹类型
public static final int TYPE_SYSTEM = 2; // 系统类型
/** /**
* Following IDs are system folders' identifiers * 以下常量是系统文件夹的标识符
* {@link Notes#ID_ROOT_FOLDER } is default folder * {@link Notes#ID_ROOT_FOLDER} 是默认文件夹
* {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder * {@link Notes#ID_TEMPARAY_FOLDER} 是存储不属于任何文件夹的笔记
* {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录
*/ */
public static final int ID_ROOT_FOLDER = 0; public static final int ID_ROOT_FOLDER = 0; // 根文件夹的 ID
public static final int ID_TEMPARAY_FOLDER = -1; public static final int ID_TEMPARAY_FOLDER = -1; // 临时文件夹的 ID
public static final int ID_CALL_RECORD_FOLDER = -2; public static final int ID_CALL_RECORD_FOLDER = -2; // 通话记录文件夹的 ID
public static final int ID_TRASH_FOLER = -3; public static final int ID_TRASH_FOLER = -3; // 垃圾桶文件夹的 ID
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // Intent 中传递的额外参数常量，用于与笔记相关的操作
public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; // 提醒日期
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; // 背景颜色 ID
public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; // 小部件 ID
public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; // 小部件类型
public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; // 文件夹 ID
public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; // 通话日期
public static final int TYPE_WIDGET_INVALIDE = -1;
public static final int TYPE_WIDGET_2X = 0; // 定义了不同类型的小部件常量
public static final int TYPE_WIDGET_4X = 1; public static final int TYPE_WIDGET_INVALIDE = -1; // 无效小部件类型
public static final int TYPE_WIDGET_2X = 0; // 2x 小部件类型
public static final int TYPE_WIDGET_4X = 1; // 4x 小部件类型
// 数据常量类，定义了笔记和通话记录的内容类型
public static class DataConstants { public static class DataConstants {
public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; // 笔记的内容类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; // 通话记录的内容类型
} }
/** /**
* Uri to query all notes and folders * 用于查询所有笔记和文件夹的 URI
*/ */
public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); // 查询笔记的 URI
/** /**
* Uri to query data * 用于查询数据的 URI
*/ */
public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); // 查询数据的 URI
// 笔记相关的列定义接口，包含笔记的数据列
public interface NoteColumns { public interface NoteColumns {
/**
* The unique ID for a row
* <P> Type: INTEGER (long) </P>
*/
public static final String ID = "_id";
/** /**
* The parent's id for note or folder * 每一行的唯一 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String PARENT_ID = "parent_id"; public static final String ID = "_id"; // 唯一标识符
/** /**
* Created data for note or folder * 笔记或文件夹的父 ID
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String CREATED_DATE = "created_date"; public static final String PARENT_ID = "parent_id"; // 父级 ID
/** /**
* Latest modified date * 笔记或文件夹的创建日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String MODIFIED_DATE = "modified_date"; public static final String CREATED_DATE = "created_date"; // 创建日期
/** /**
* Alert date * 笔记或文件夹的最后修改日期
* <P> Type: INTEGER (long) </P> * <P> 类型: INTEGER (long) </P>
*/ */
public static final String ALERTED_DATE = "alert_date"; public static final String MODIFIED_DATE = "modified_date"; // 最后修改日期
}
}
/**
* Folder's name or text content of note
* <P> Type: TEXT </P>
*/
public static final String SNIPPET = "snippet";
/** /**
* Note's widget id * The constant fields represent various columns of a note-taking application database.
* <P> Type: INTEGER (long) </P> * These constants are used to define column names and their data types within the database schema.
*/ */
public static final String WIDGET_ID = "widget_id"; public static final String ALERTED_DATE = "alert_date"; // 记录提醒日期，数据类型：INTEGER（长整型）
/** public static final String SNIPPET = "snippet"; // 记录文件夹名称或笔记的文本内容，数据类型：TEXT（字符串）
* Note's widget type
* <P> Type: INTEGER (long) </P>
*/
public static final String WIDGET_TYPE = "widget_type";
/** public static final String WIDGET_ID = "widget_id"; // 记录笔记的小部件ID，数据类型：INTEGER（长整型）
* Note's background color's id
* <P> Type: INTEGER (long) </P>
*/
public static final String BG_COLOR_ID = "bg_color_id";
/** public static final String WIDGET_TYPE = "widget_type"; // 记录笔记的小部件类型，数据类型：INTEGER（长整型）
* For text note, it doesn't has attachment, for multi-media
* note, it has at least one attachment
* <P> Type: INTEGER </P>
*/
public static final String HAS_ATTACHMENT = "has_attachment";
/** public static final String BG_COLOR_ID = "bg_color_id"; // 记录笔记的背景颜色ID，数据类型：INTEGER（长整型）
* Folder's count of notes
* <P> Type: INTEGER (long) </P>
*/
public static final String NOTES_COUNT = "notes_count";
/** public static final String HAS_ATTACHMENT = "has_attachment"; // 标记笔记是否有附件，文本笔记没有附件，多媒体笔记至少有一个附件，数据类型：INTEGER（整型）
* The file type: folder or note
* <P> Type: INTEGER </P>
*/
public static final String TYPE = "type";
/** public static final String NOTES_COUNT = "notes_count"; // 文件夹中笔记的数量，数据类型：INTEGER（长整型）
* The last sync id
* <P> Type: INTEGER (long) </P>
*/
public static final String SYNC_ID = "sync_id";
/** public static final String TYPE = "type"; // 文件类型，标识为文件夹或笔记，数据类型：INTEGER（整型）
* Sign to indicate local modified or not
* <P> Type: INTEGER </P>
*/
public static final String LOCAL_MODIFIED = "local_modified";
/** public static final String SYNC_ID = "sync_id"; // 记录上次同步的ID，数据类型：INTEGER（长整型）
* Original parent id before moving into temporary folder
* <P> Type : INTEGER </P>
*/
public static final String ORIGIN_PARENT_ID = "origin_parent_id";
/** public static final String LOCAL_MODIFIED = "local_modified"; // 本地修改标识，用来表示该项是否被本地修改过，数据类型：INTEGER（整型）
* The gtask id
* <P> Type : TEXT </P>
*/
public static final String GTASK_ID = "gtask_id";
/** public static final String ORIGIN_PARENT_ID = "origin_parent_id"; // 记录笔记或文件夹在移动到临时文件夹之前的原始父级ID，数据类型：INTEGER（整型）
* The version code
* <P> Type : INTEGER (long) </P>
*/
public static final String VERSION = "version";
}
public interface DataColumns { public static final String GTASK_ID = "gtask_id"; // 记录Google任务的ID，数据类型：TEXT（字符串）
/**
* The unique ID for a row
* <P> Type: INTEGER (long) </P>
*/
public static final String ID = "_id";
/** public static final String VERSION = "version"; // 记录笔记或文件夹的版本号，数据类型：INTEGER（长整型）
* The MIME type of the item represented by this row.
* <P> Type: Text </P>
*/
public static final String MIME_TYPE = "mime_type";
/** /**
* The reference id to note that this data belongs to * DataColumns接口用于定义存储在数据表中的列字段，通常用于数据相关的记录。
* <P> Type: INTEGER (long) </P> */
*/ public interface DataColumns {
public static final String NOTE_ID = "note_id"; public static final String ID = "_id"; // 记录行的唯一标识符，数据类型：INTEGER（长整型）
/** public static final String MIME_TYPE = "mime_type"; // 记录数据项的MIME类型，数据类型：TEXT（字符串）
* Created data for note or folder
* <P> Type: INTEGER (long) </P>
*/
public static final String CREATED_DATE = "created_date";
/** public static final String NOTE_ID = "note_id"; // 记录数据所对应的笔记ID，数据类型：INTEGER（长整型）
* Latest modified date
* <P> Type: INTEGER (long) </P>
*/
public static final String MODIFIED_DATE = "modified_date";
/** public static final String CREATED_DATE = "created_date"; // 记录数据创建的日期，数据类型：INTEGER（长整型）
* Data's content
* <P> Type: TEXT </P>
*/
public static final String CONTENT = "content";
public static final String MODIFIED_DATE = "modified_date"; // 记录数据最后修改的日期，数据类型：INTEGER（长整型）
/** public static final String CONTENT = "content"; // 记录数据的具体内容，数据类型：TEXT（字符串）
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* integer data type
* <P> Type: INTEGER </P>
*/
public static final String DATA1 = "data1";
/** public static final String DATA1 = "data1"; // 一个通用数据列，具体意义根据MIME类型而定，数据类型：INTEGER（整型）
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* integer data type
* <P> Type: INTEGER </P>
*/
public static final String DATA2 = "data2";
public static final String DATA2 = "data2"; // 另一个通用数据列，具体意义根据MIME类型而定，数据类型：INTEGER（整型）
}
/** /**
* Generic data column, the meaning is {@link #MIMETYPE} specific, used for * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
* TEXT data type * TEXT data type
@ -277,3 +209,4 @@ public class Notes {
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
} }
} }

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