未读gmail邮件

public static final class LabelColumns { 
    public static final String CANONICAL_NAME = "canonicalName"; 
    public static final String NAME = "name"; 
    public static final String NUM_CONVERSATIONS = "numConversations"; 
    public static final String NUM_UNREAD_CONVERSATIONS = "numUnreadConversations"; 
} 
 
public void queryLabels(){ 
    String account="[email protected]"; 
    Uri LABELS_URI = Uri.parse("content://gmail-ls/labels/"); 
    Uri ACCOUNT_URI = Uri.withAppendedPath(LABELS_URI, account); 
    ContentResolver contentResolver=myActivity.getContentResolver(); 
    Cursor cursor = contentResolver.query(ACCOUNT_URI, null, null, null, null); 
 
    //iterate over all labels in the account 
    if (cursor.moveToFirst()) { 
        int unreadColumn = cursor.getColumnIndex(LabelColumns.NUM_UNREAD_CONVERSATIONS); 
        int nameColumn = cursor.getColumnIndex(LabelColumns.NAME); 
        do { 
            String name = cursor.getString(nameColumn); 
            String unread = cursor.getString(unreadColumn);//here's the value you need 
        } while (cursor.moveToNext()); 
    } 
} 
<uses-permission android:name="com.google.android.gm.permission.READ_GMAIL"/>