添加了注释

src/net/micode/notes/gtask/data/MetaData.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package net.micode.notes.gtask.data;
+package net.micode.notes.gtask.data;/*MetaData类继承自Task类，代表了一条元数据，用于存储与任务相关的信息。*/
 
 import android.database.Cursor;
 import android.util.Log;
@@ -28,18 +28,18 @@ import org.json.JSONObject;
 public class MetaData extends Task {
     private final static String TAG = MetaData.class.getSimpleName();
 
-    private String mRelatedGid = null;
+    private String mRelatedGid = null;//用于存储任务的Google ID
 
-    public void setMeta(String gid, JSONObject metaInfo) {
+    public void setMeta(String gid, JSONObject metaInfo) {//设置元数据(1) @param gid 任务的Google ID(2)@param metaInfo 和任务相关的信息
         try {
-            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
+            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);//将任务的Google ID存入和任务相关的信息中
         } catch (JSONException e) {
             Log.e(TAG, "failed to put related gid");
         }
-        setNotes(metaInfo.toString());
+        setNotes(metaInfo.toString());//将和任务相关的信息存储到笔记内容中
-        setName(GTaskStringUtils.META_NOTE_NAME);
+        setName(GTaskStringUtils.META_NOTE_NAME);//设置元数据的名称为META_NOTE_NAME
     }
-
+/* 返回与元数据相关的GID*/
     public String getRelatedGid() {
         return mRelatedGid;
     }
@@ -48,14 +48,14 @@ public class MetaData extends Task {
     public boolean isWorthSaving() {
         return getNotes() != null;
     }
-
+/**从远程服务器的JSON对象中设置元数据的内容 */
     @Override
     public void setContentByRemoteJSON(JSONObject js) {
-        super.setContentByRemoteJSON(js);
+        super.setContentByRemoteJSON(js);//调用父类的setContentByRemoteJSON方法
-        if (getNotes() != null) {
+        if (getNotes() != null) {//如果笔记内容不为空
             try {
-                JSONObject metaInfo = new JSONObject(getNotes().trim());
+                JSONObject metaInfo = new JSONObject(getNotes().trim());//将笔记内容转换为JSONObject
-                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
+                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);//获取和任务相关的信息的Google ID
             } catch (JSONException e) {
                 Log.w(TAG, "failed to get related gid");
                 mRelatedGid = null;
@@ -63,17 +63,18 @@ public class MetaData extends Task {
         }
     }
     
+/**该方法不应被调用*/
     @Override
     public void setContentByLocalJSON(JSONObject js) {
         // this function should not be called
         throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
     }
-
+/**该方法不应被调用*/
     @Override
     public JSONObject getLocalJSONFromContent() {
         throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
     }
-
+/**该方法不应被调用*/
     @Override
     public int getSyncAction(Cursor c) {
         throw new IllegalAccessError("MetaData:getSyncAction should not be called");