无法解析方法＆＃39;格式（java.lang.string，java.Util.Date）＆＃39;

Question

我收到此错误：

我是Android App开发的新手。任何人都可以帮助我吗？

Answer 1

你必须通过对象调用方法。它不是一种静态的方法。

android.text.format.DateFormat df = new android.text.format.DateFormat();
dateTextView.setText(df.format("dd/MM/yyyy hh:mm:ss", date).toString());

Answer 2

确保您拥有导入：

CREATE TABLE #testTbl(ID INT IDENTITY PRIMARY KEY, SomeData VARCHAR(100),XmlColumn XML);
GO

DECLARE @RndNumber VARCHAR(100)=(SELECT CAST(CAST(RAND()*1000 AS INT) AS VARCHAR(100)));

INSERT INTO #testTbl VALUES('Data_' + @RndNumber,
'<error application="application" host="host" type="exception" message="message" >
  <serverVariables>
    <item name="name1">
      <value string="text" />
    </item>
    <item name="name2">
      <value string="text2" />
    </item>
    <item name="name3">
      <value string="text3" />
    </item>
    <item name="name4">
      <value string="text4" />
    </item>
    <item name="name5">
      <value string="My test ' +  @RndNumber + '" />
    </item>
    <item name="name6">
      <value string="text6" />
    </item>
    <item name="name7">
      <value string="text7" />
    </item>
  </serverVariables>
</error>');

GO 100000

DECLARE @d DATETIME=GETDATE()
SELECT #testTbl.*
FROM #testTbl
CROSS APPLY XmlColumn.nodes('/error/serverVariables/item[@name="name5" and value/@string="My test 600"]') AS a(b);
SELECT CAST(GETDATE()-@d AS TIME) AS NodesFullPath_no_index;
GO

DECLARE @d DATETIME=GETDATE();
SELECT * 
FROM #testTbl
--WHERE XmlColumn.exist('//item[@name[. = "name5"] and value/@string[. = "My test 600"]]') = 1
--The same, just a bit shorter...
WHERE XmlColumn.exist('/error/serverVariables/item[@name="name5" and value/@string="My test 600"]') = 1;
SELECT CAST(GETDATE()-@d AS TIME) AS ExistFullPath_no_index;
GO

DECLARE @d DATETIME=GETDATE();
SELECT * 
FROM #testTbl
--WHERE XmlColumn.exist('//item[@name[. = "name5"] and value/@string[. = "My test 600"]]') = 1
--The same, just a bit shorter...
WHERE XmlColumn.exist('//item[@name="name5" and value/@string="My test 500"]') = 1;
SELECT CAST(GETDATE()-@d AS TIME) AS ExistShortPath_no_index;
GO

DECLARE @d DATETIME=GETDATE()
SELECT #testTbl.*
FROM #testTbl
CROSS APPLY XmlColumn.nodes('//item[@name="name5" and value/@string="My test 500"]') AS a(b);
SELECT CAST(GETDATE()-@d AS TIME) AS NodesShortPath_no_index;
GO

CREATE PRIMARY XML INDEX PXML_test_XmlColum1 ON #testTbl(XmlColumn);
CREATE XML INDEX IXML_test_XmlColumn2 ON #testTbl(XmlColumn) USING XML INDEX PXML_test_XmlColum1 FOR PATH;
GO

DECLARE @d DATETIME=GETDATE()
SELECT #testTbl.*
FROM #testTbl
CROSS APPLY XmlColumn.nodes('/error/serverVariables/item[@name="name5" and value/@string="My test 600"]') AS a(b);
SELECT CAST(GETDATE()-@d AS TIME) AS NodesFullPath_with_index;
GO

DECLARE @d DATETIME=GETDATE();
SELECT * 
FROM #testTbl
--WHERE XmlColumn.exist('//item[@name[. = "name5"] and value/@string[. = "My test 600"]]') = 1
--The same, just a bit shorter...
WHERE XmlColumn.exist('/error/serverVariables/item[@name="name5" and value/@string="My test 600"]') = 1;
SELECT CAST(GETDATE()-@d AS TIME) AS ExistFullPath_with_index;
GO

DECLARE @d DATETIME=GETDATE();
SELECT * 
FROM #testTbl
--WHERE XmlColumn.exist('//item[@name[. = "name5"] and value/@string[. = "My test 600"]]') = 1
--The same, just a bit shorter...
WHERE XmlColumn.exist('//item[@name="name5" and value/@string="My test 500"]') = 1;
SELECT CAST(GETDATE()-@d AS TIME) AS ExistShortPath_with_index;
GO

DECLARE @d DATETIME=GETDATE()
SELECT #testTbl.*
FROM #testTbl
CROSS APPLY XmlColumn.nodes('//item[@name="name5" and value/@string="My test 500"]') AS a(b);
SELECT CAST(GETDATE()-@d AS TIME) AS NodesShortPath_with_index;
GO

DROP TABLE #testTbl;

如果此操作失败，您可能会错过某些库文件或将您的Android SDK设置搞砸了。也许你应该提供更多的信息，更具体，以避免获得更多的投票。

问候！