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new annotation

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master
2290867136 2 years ago
parent 366aa60e73
commit a1b8d95cef
1 changed files with 47 additions and 43 deletions
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90
app/src/main/java/net/micode/notes/tool/DataUtils.java
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@ -39,28 +39,29 @@ public class DataUtils {
public static final String TAG = "DataUtils";
public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
if (ids == null) {
Log.d(TAG, "the ids is null");
Log.d(TAG, "the ids is null");//IDS是空
return true;
}
if (ids.size() == 0) {
Log.d(TAG, "no id is in the hashset");
Log.d(TAG, "no id is in the hashset");//hash集里没有ID
return true;
}
ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
for (long id : ids) {
if(id == Notes.ID_ROOT_FOLDER) {
Log.e(TAG, "Don't delete system folder root");
Log.e(TAG, "Don't delete system folder root");//不删除根文件
continue;
}
ContentProviderOperation.Builder builder = ContentProviderOperation
.newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
.newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));//实现删除功能
operationList.add(builder.build());
}
try {
ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
//唯一标识这个ContentProvider，起标记作用
if (results == null || results.length == 0 || results[0] == null) {
Log.d(TAG, "delete notes failed, ids:" + ids.toString());
Log.d(TAG, "delete notes failed, ids:" + ids.toString());//提示删除失败并返回IDS
return false;
}
return true;
@ -78,28 +79,30 @@ public class DataUtils {
values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
values.put(NoteColumns.LOCAL_MODIFIED, 1);
resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
//对需要移动的便签进行数据更新，然后用update实现
}
public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
long folderId) {
if (ids == null) {
Log.d(TAG, "the ids is null");
Log.d(TAG, "the ids is null");//IDS为空
return true;
}
ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
for (long id : ids) {
ContentProviderOperation.Builder builder = ContentProviderOperation
.newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
.newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));//通过withAppendedId方法，为该Uri加上ID
builder.withValue(NoteColumns.PARENT_ID, folderId);
builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
operationList.add(builder.build());
}
}//将ids里包含的每一列的数据逐次加入到operationList中，等待最后的批量处理
try {
ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
//applyBatch一次性处理一个操作列表
if (results == null || results.length == 0 || results[0] == null) {
Log.d(TAG, "delete notes failed, ids:" + ids.toString());
Log.d(TAG, "delete notes failed, ids:" + ids.toString());//删除失败并返回IDS
return false;
}
return true;
@ -119,7 +122,7 @@ public class DataUtils {
new String[] { "COUNT(*)" },
NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
null);
null);//筛选条件：源文件不为trash folder
int count = 0;
if(cursor != null) {
@ -127,28 +130,29 @@ public class DataUtils {
try {
count = cursor.getInt(0);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "get folder count failed:" + e.toString());
Log.e(TAG, "get folder count failed:" + e.toString());//获取文件夹计数失败
} finally {
cursor.close();
cursor.close();//释放
}
}
}
return count;
return count;//返回计数
}
public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
null,
//为Uri加上ID
null,
NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
new String [] {String.valueOf(type)},
null);
null);//查询条件：type符合，且不属于垃圾文件夹
boolean exist = false;
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
}//判断cursor是否为空
cursor.close();//释放
}
return exist;
}
@ -162,7 +166,7 @@ public class DataUtils {
if (cursor.getCount() > 0) {
exist = true;
}
cursor.close();
cursor.close();//释放
}
return exist;
}
@ -171,14 +175,14 @@ public class DataUtils {
Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
null, null, null, null);
boolean exist = false;
boolean exist = false;//设置条件值
if (cursor != null) {
if (cursor.getCount() > 0) {
exist = true;
exist = true;//count存在
}
cursor.close();
cursor.close();//释放
}
return exist;
return exist;//count是否存在
}
public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
@ -186,15 +190,15 @@ public class DataUtils {
NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
" AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
" AND " + NoteColumns.SNIPPET + "=?",
new String[] { name }, null);
boolean exist = false;
new String[] { name }, null);//通过名字查询文件是否存在
boolean exist = false;//设置条件值
if(cursor != null) {
if(cursor.getCount() > 0) {
exist = true;
}
cursor.close();
cursor.close();//关闭
}
return exist;
return exist;//是否存在
}
public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
@ -202,7 +206,7 @@ public class DataUtils {
new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
NoteColumns.PARENT_ID + "=?",
new String[] { String.valueOf(folderId) },
null);
null);//查询条件：父ID是传入的folderId;
HashSet<AppWidgetAttribute> set = null;
if (c != null) {
@ -211,15 +215,15 @@ public class DataUtils {
do {
try {
AppWidgetAttribute widget = new AppWidgetAttribute();
widget.widgetId = c.getInt(0);
widget.widgetType = c.getInt(1);
set.add(widget);
widget.widgetId = c.getInt(0);//0对应的NoteColumns.WIDGET_ID
widget.widgetType = c.getInt(1);//1对应的NoteColumns.WIDGET_TYPE
set.add(widget);//添加界面
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, e.toString());
}
} while (c.moveToNext());
} while (c.moveToNext());//查询下一条直到全部
}
c.close();
c.close();//释放
}
return set;
}
@ -235,9 +239,9 @@ public class DataUtils {
try {
return cursor.getString(0);
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "Get call number fails " + e.toString());
Log.e(TAG, "Get call number fails " + e.toString());//获取呼叫号码失败
} finally {
cursor.close();
cursor.close();//释放
}
}
return "";
@ -249,17 +253,17 @@ public class DataUtils {
CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
+ CallNote.PHONE_NUMBER + ",?)",
new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
null);
null);//通过数据库操作，查询条件是（callDate和phoneNumber匹配传入参数的值）
if (cursor != null) {
if (cursor.moveToFirst()) {
try {
return cursor.getLong(0);
return cursor.getLong(0);//0对应的CallNote.NOTE_ID
} catch (IndexOutOfBoundsException e) {
Log.e(TAG, "Get call note id fails " + e.toString());
Log.e(TAG, "Get call note id fails " + e.toString());//获取呼叫便签ID失败
}
}
cursor.close();
cursor.close();//释放
}
return 0;
}
@ -269,17 +273,17 @@ public class DataUtils {
new String [] { NoteColumns.SNIPPET },
NoteColumns.ID + "=?",
new String [] { String.valueOf(noteId)},
null);
null);//查询条件：noteId
if (cursor != null) {
String snippet = "";
if (cursor.moveToFirst()) {
snippet = cursor.getString(0);
}
cursor.close();
}//如果移到第一位
cursor.close();//释放
return snippet;
}
throw new IllegalArgumentException("Note is not found with id: " + noteId);
throw new IllegalArgumentException("Note is not found with id: " + noteId);//找不到便签的ID
}
public static String getFormattedSnippet(String snippet) {
@ -291,5 +295,5 @@ public class DataUtils {
}
}
return snippet;
}
}//对字符串进行格式处理，将字符串两头的空格去掉，同时将换行符去掉
}

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