小编chi*_*_82的帖子

我试图通过应用程序(由其他人开发)来确定哪些表受数据更新的影响.数据库中有200多个表,我想避免检查每个表的更改.

有没有其他方法可以列出所有表名及其行数？

select table_name from information_schema.tables

列出我的数据库中的所有表格购买如何包含行数？

我正在做一些适当利用Android资源目录的研究,以下内容对我来说并不清楚:

android animator资源目录和android anim资源目录有什么区别？

http://developer.android.com/guide/topics/resources/providing-resources.html#AlternativeResources

此外,我想我问的问题是属性动画和补间动画之间的区别是什么？

下面是我读取excel文件的代码.

码.

FileInfo newFile = new FileInfo("C:\\Excel\\SampleStockTakeExceptionReport.xls");
ExcelPackage pck = new ExcelPackage(newFile);
var ws = pck.Workbook.Worksheets.Add("Content");
ws.View.ShowGridLines = false;
ws.Cells["J12"].Value = "Test Write";
pck.Save();
System.Diagnostics.Process.Start("C:\\Excel\\SampleStockTakeExceptionReport.xls");

当我运行代码时,它会抛出一个运行时错误.

错误

System.Exception: Can not open the package. Package is an OLE compound document. If this is an encrypted package, please supply the password ---> System.IO.FileFormatException: File contains corrupted data.
   at MS.Internal.IO.Zip.ZipIOEndOfCentralDirectoryBlock.FindPosition(Stream archiveStream)
   at MS.Internal.IO.Zip.ZipIOEndOfCentralDirectoryBlock.SeekableLoad(ZipIOBlockManager blockManager)
   at MS.Internal.IO.Zip.ZipArchive..ctor(Stream archiveStream, FileMode mode, FileAccess access, Boolean streaming, Boolean ownStream)
   at MS.Internal.IO.Zip.ZipArchive.OpenOnStream(Stream stream, FileMode mode, FileAccess access, Boolean …

我正在使用这个,从互联网上显示图像,但它抛出一个错误如下:
04-12 13:45:05.337:E/AndroidRuntime(27897):引起:android.view.ViewRootImpl $ CalledFromWrongThreadException:只有原始线程创建视图层次结构可以触及其视图.

public class Order extends Activity {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            new DownloadFilesTask().execute();       
        }    
        private class DownloadFilesTask extends AsyncTask<Void, Void, Void> {
            protected void onPostExecute(Void result) {
            }
             @Override
             protected Void doInBackground(Void... params) {
                 setContentView(R.layout.order);
                    ImageView imageView = (ImageView)findViewById(R.id.imgView);  
                    imageView.setImageDrawable(createDrawableFromURL("http://savagelook.com/misc/sl_drop2.png"));
                    return null;
             }          
        }     
        private Drawable createDrawableFromURL(String urlString) {
            Drawable image = null;
        try {
            URL url = new URL(urlString);
            InputStream is = (InputStream)url.getContent();
            image = Drawable.createFromStream(is, "src");
        } catch (MalformedURLException …

我为我的客户端Web服务运行wsimport后,构造函数服务(URL,QName,WebServiceFeature [])是未定义的错误.我正在使用JDK 1.6.请帮忙.

我正在关注http://googcloudlabs.appspot.com/教程来创建新的Google App Engine项目.当我尝试从我的本地主机运行时,它会向我抛出一个错误,但是当我部署它时工作正常.(http://mynewcloudcom.appspot.com/).请帮忙.

HTTP ERROR: 503
Problem accessing /. Reason:
SERVICE_UNAVAILABLE
Powered by Jetty://

Eclipse控制台

Mar 05, 2012 10:42:46 AM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Mar 05, 2012 10:42:46 AM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed C:\Smartag_Eclipse_Project\DontEditProject\war\WEB-INF/appengine-web.xml
Mar 05, 2012 10:42:46 AM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
INFO: Successfully processed C:\Smartag_Eclipse_Project\DontEditProject\war\WEB-INF/web.xml
Mar 05, 2012 6:42:48 PM com.google.appengine.tools.development.DevAppServerImpl start
INFO: The server is running at http://localhost:8888/
Mar 05, 2012 6:42:48 PM com.google.appengine.tools.development.DevAppServerImpl start
INFO: The admin console is …

我是JSON的新手.我按照本教程创建了示例应用程序.当我尝试将代码复制到我的eclipse时,它显示错误.

Call requires API level 9 (current min is 8): android.os.StrictMode#setThreadPolicy

请指教.谢谢

我正在尝试使用自定义布局通知编写可穿戴应用程序,但我的模拟器未正确显示自定义可穿戴通知.(我只是得到一张带有黑匣子的卡片......它甚至发生在示例应用程序通知上).

我有一个Moto 360,但由于它没有USB端口,我不知道如何使用Android Studio在那里部署可调试的应用程序.

有什么想法吗？(尝试不创建和打包以及app /发布到商店进行调试,因为如果有一种方法可以直接打包应用并将它们发送到moto 360,那将是一个巨大的浪费时间).

我试图为我的项目创建servlet但遇到了The import javax.servlet.annotation cannot be resolved.我已经添加javax.servlet并servlet-api.jar从Tomcat.请参考下图.

我正在尝试使用sharedpreferences来检查用户在开始使用应用程序之前是否已登录.我在用户登录时将用户名保存在shredpreferences中.

Login.java

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);     
        Button btnLogin = (Button) findViewById(R.id.buttonlogin);      
        btnLogin.setOnClickListener(new View.OnClickListener() {
            public void onClick(View adapt) {
                EditText usernameEditText = (EditText) findViewById(R.id.EditUserName);
                userName = usernameEditText.getText().toString();
                EditText passwordEditText = (EditText) findViewById(R.id.EditPassword);
                userPassword = passwordEditText.getText().toString();               
                if (userName.matches("") && userPassword.matches("")) {
                    toast("Please enter Username and Password");
                    return;
                } else if (userName.matches("") || userName.equals("")) {
                    toast("Please enter Username");
                    return;
                } else if (userPassword.matches("") || userPassword.equals("")) {
                    toast("Please enter Password");
                    return;
                } else {
                    SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
                    SharedPreferences.Editor editor …