如何在Windows机器上将Android应用程序连接到MSSQL数据库的分步说明。
努力寻找从android使用连接到MSSQL数据库的正确解决方案 jtds.jdbc驱动程序，最糟糕的是，我不清楚问题是数据库还是jtds.jdbc驱动程序。
public class DBTestActivity extends Activity {
private static final String url = "jdbc:jtds:sqlserver://10.0.2.2:1433;instance=testdb;DatabaseName=androidtest";
private static final String user = "test\'testuser";
private static final String pass = "testlog";
TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dbconnect);
final Button button = (Button) findViewById(R.id.connect);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.d("test3", "text4");
// Perform action on click
Connect();
tv = (TextView) findViewById(R.id.db_text);
}
});
}
private class Connect extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
String response = "";
try {
Log.d("test5", "text5");
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Log.d("test77", "text77");
Connection con = DriverManager.getConnection(url, user, pass);
Log.d("test12", "text12");
String result = "Database connection success\n";
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select * from dbo.Test_Manufacturer");
ResultSetMetaData rsmd = rs.getMetaData();*/
while(rs.next()) {
result += rsmd.getColumnName(1) + ": " + rs.getInt(1) + "\n";
result += rsmd.getColumnName(2) + ": " + rs.getString(2) + "\n";
result += rsmd.getColumnName(3) + ": " + rs.getString(3) + "\n";
}
tv.setText(result);
}
catch(Exception e) {
e.printStackTrace();
// tv.setText(e.toString());
}
Log.d("test20", "text212");
return response;
}
@Override
protected void onPostExecute(String result) {
Log.d("test2", "text2");
tv.setText(result);
}
}
public void Connect() {
Log.d("test", "text1");
Connect task = new Connect();
task.execute();
}
}
得到了不同类型的错误：
答案 0 :(得分：1)
经过无数次互联网研究后，我想出了一步一步的过程。
In order to set the environment with MSSQL server database and create connection to the
specific port, you need:
1)create DB in SQL server management studio(http://www.youtube.com/watch?v=18wZWdMSb9c)
2)port number which listens(e.g 1433, 25, 80) (http://jackal777.wordpress.com/2011/10/24/open-rdesktop-port-3389-in-firewall-via-command-line/)
http://www.windowsnetworking.com/articles-tutorials/windows-2003/Using-Netsh-Windows-Firewall.html
http://www.gfi.com/blog/scan-open-ports-in-windows-a-quick-guide/
3)Configure SQL server to specific port
4)SQL server management studio user name and password
5)Downloaded and installed jTDS JDBC Driver
configure SQL server to listen to 1433, description here
http://support.webecs.com/kb/a868/how-do-i-configure-sql-server-express-to-allow-remote.aspx
1)Click Start, Programs, Microsoft SQL Server 2005/2008/2012 and select SQL Server Configuration Manager.
2)SQL Server Network Configuration
3)Protocols for 'whatever the name of your instance' (could be Express or your name)
4) TCP/I
5) IP Addresses tab
6) Scroll to IPALL
7) Set to specific port, in this case it's 1433
When you've done setting port in SQL management studio, go and check which ports are listening, go to command prompt write: netstat -a
NOTE:You might need to activate the port through cmd.exe(look in the web)
plus - check Computer Management if the service 'SQL Server Browser' status is 'Started'
(right click on Computer icon - Manage - Services and Applications - Services)
Additionally you can add exception rule in the Advanced Firewall Settings.
Sample code could be found here:
Thanks guys, you really helped me!
http://appinventor.blogspot.de/2011/07/android-mysql.html
http://blog.althafkbacker.com/2013/10/android-and-microsoft-sql-ms-sql-server.html
3) Download and installed jTDS JDBC Driver
the latest version:
http://sourceforge.net/projects/jtds/files/
previous version:
http://www.findjar.com/jar/net.sourceforge.jtds/jars/jtds-1.2.jar.html
I've chosen previous version, because it worked straight away.
When unpacked, then go to eclipse, select your project - right click - properties - libraries - Add External JARs - then - order and export - tick it
My reworked code(needs cleaning though):
1)quick solution for separate network thread, is this piece of code:
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Place it into onCreate();
Credit to: http://stackoverflow.com/questions/19266553/android-caused-by-android-os-networkonmainthreadexception
Although the best way is to use AsyncTask method.
2)connect failed: ECONNREFUSED
use 10.0.2.2 for localhost for the emulator runs (this case 10.0.2.2 : 1433)
NOTE: if you are running on the device then you need to use your IPv4 address : 1433
Credit to: http://stackoverflow.com/questions/18341652/connect-failed-econnrefused
In order to properly function either remove Intent in2 = getIntent(); piece of code(from DBTestActivity) or add MainActivity
//catches intent request from MainActivity or secondaryActivity
Intent in2 = getIntent();
String tv2 = in2.getExtras().getString("key");
What code does is connects to DB, retrieves requested fields and then updates them.
注意：还有一个主要的活动代码，不包括在内。下面是Acitivty的代码，它可以用来连接数据库。
public class DBTestActivity extends Activity {
ListView Lista;
SimpleAdapter AD;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dbconnect);
//handles database requests on different thread
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Lista = (ListView) findViewById(R.id.list_output);
//catches intent request from MainActivity or secondaryActivity
Intent in2 = getIntent();
String tv2 = in2.getExtras().getString("key");
TextView theFact = (TextView) findViewById(R.id.db_barcode);
String shareFact = tv2.toString();
theFact.setText(shareFact);
final Button button = (Button) findViewById(R.id.connect);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.d("test1", "1");
//Perform action on click
TextView deFact = (TextView) findViewById(R.id.db_barcode);
String shareFact123 = deFact.getText().toString();
//TextView deFact2 = (TextView) findViewById(R.id.db_text2);
EditText deFact2 = (EditText) findViewById(R.id.db_task);
//String shareFact2 = shareFact123.toString();
deFact2.setText(shareFact123);
//deFact2.setText(shareFact2);
connect();
}
});
final Button button12 = (Button) findViewById(R.id.retrieve);
button12.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Log.d("test2", "2");
//Perform action on click
//empty variables for storing the parameters of save()
EditText deFact244 = (EditText) findViewById(R.id.db_task3);
String shareFact1233 = deFact244.getText().toString();
Log.d("retrtieve button", shareFact1233);
// deFact244.setText(shareFact1233);
String jjj1 = "";
String jj2 = "";
String j3 = "";
String retrtieve = shareFact1233;
save(jj2,jjj1,j3,retrtieve);
}
});
}//onCreate(Bundle savedInstanceState)
public void connect() {
try {
TextView theFactbarcode = (TextView) findViewById(R.id.db_barcode);
String shareFactbarcode = theFactbarcode.getText().toString();
String dbvariable = shareFactbarcode;
Log.d("test3.0", dbvariable);
Log.d("test3", "3");
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Log.d("test4", "4");
Connection con = DriverManager.getConnection("jdbc:jtds:sqlserver://10.0.2.2:1433/androidtest","usernameMSSQL","passwordMSSQL");
Log.d("test5", "5");
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select * from dbo.nameAndroid where barcode='"+dbvariable+"'");
Log.d("test5.1", "5.1");
while(rs.next()) {
Log.v("test6", rs.getString(2));
String res = rs.getString(2);
TextView deFact22 = (TextView) findViewById(R.id.db_text2);
String shaF = rs.getString(2);
deFact22.setText(shaF);
//was responsible for showing the name in edittext field
//TextView deF = (TextView) findViewById(R.id.db_text2);
//String shF = deF.getText().toString();
//TextView deFact2 = (TextView) findViewById(R.id.db_text2);
// EditText deF2 = (EditText) findViewById(R.id.db_task);
//String shareFact2 = shareFact123.toString();
// String defdef= deF2.getText().toString();
// deF2.setText(shF);
// Log.v("test7", defdef );
// String kk =defdef;
Log.v("test8", res );
List<Map<String, String>> data = null;
data = new ArrayList<Map<String,String>>();
Map<String, String> datanum = new HashMap<String, String>();
datanum.put("A", rs.getString("name"));
datanum.put("B", rs.getString("id"));
datanum.put("C", rs.getString("barcode"));
data.add(datanum);
//String name = datanum.put("A", rs.getString("name"));
String barcod = datanum.put("C", rs.getString("barcode"));
Log.v("test9", barcod);
String jj = datanum.put("B", rs.getString("id"));
int foo = Integer.parseInt(jj);
for(int i = 0;i<jj.length();i++){
Log.v("test10",jj);
System.out.println(foo);
TextView deF29 = (TextView) findViewById(R.id.db_text);
String defdefT= jj.toString();
deF29.setText(defdefT);
}//end of for loop
Log.v("test11", "11" );
// if(kk.toString()=="Android"){
// Log.v("DB111", "test" );
String retr = null;
// }
// else{
save(res,jj,barcod,retr);//call function save
// }
/*String[] from = {"A","B","C"};
int[] views = {R.id.db_text,R.id.db_text2,R.id.db_text3}; //Adapter
AD = new SimpleAdapter(this, data, R.layout.dbconnect, from, views);
Lista.setAdapter(AD); */
}//end of while loop
}
catch (Exception e){
e.printStackTrace();
}
}//end of connect()
public void save(String res,String jj,String barcod, String retrtievesave) {
/*TextView deFact22 = (TextView) findViewById(R.id.db_text);
String shareFact1234 = deFact22.getText().toString();
EditText deFact223 = (EditText) findViewById(R.id.db_task2);
deFact223.setText(shareFact1234);
String iddb = deFact223.toString(); */
TextView deFact33 = (TextView) findViewById(R.id.db_text2);
String shareFact1233 = deFact33.getText().toString();
EditText deFact244 = (EditText) findViewById(R.id.db_task3);
deFact244.setText(shareFact1233);
Log.v("test12.0", retrtievesave );
Log.v("test12", "save" );
Log.v("test13", res );
Log.v("test13.1", jj );
Log.v("test13.2", barcod );
TextView deF299 = (TextView) findViewById(R.id.db_text);
//String shareFact2 = shareFact123.toString();
String defdefT9= deF299.getText().toString();
Log.v("test14", defdefT9 );
// deF299.setText(defdefT9);
TextView nameDB = (TextView) findViewById(R.id.db_text2);
//String shareFact2 = shareFact123.toString();
String nameOneString= nameDB.getText().toString();
Log.v("test14.1", nameOneString );
TextView barcodeDB = (TextView) findViewById(R.id.db_barcode);
//String shareFact2 = shareFact123.toString();
String barcodeDBString= barcodeDB.getText().toString();
Log.v("test14.2", barcodeDBString );
String jjj = res;
String jjj4 = jj;
SharedPreferences prefs = getApplicationContext().getSharedPreferences("prefs", Context.MODE_PRIVATE);
Editor prefsEditor = prefs .edit();
prefsEditor.putString("myString", jjj4);
prefsEditor.commit();
//call the stored string
String str= prefs.getString("myString", "");
Log.v("test15", str );
EditText edited = (EditText) findViewById(R.id.db_task);
String defdef= edited.getText().toString();
Log.v("test16", defdef );
String dbvariable2 = defdef;
Log.v("test17", dbvariable2 );
Log.d("test18", "18");
EditText deFact2445 = (EditText) findViewById(R.id.db_task3);
String namedb = deFact2445.getText().toString();
Log.v("test18.0",namedb );
try{
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Log.d("test19", "19");
Connection con2 = DriverManager.getConnection("jdbc:jtds:sqlserver://10.0.2.2:1433/androidtest","usernameMSSQL","passwordMSSQL");
Log.d("test20", "20");
Statement st2 = con2.createStatement();
int rs2 = st2.executeUpdate("UPDATE [androidtest].[dbo].[nameAndroid] set barcode='"+dbvariable2+"'"+", name='"+retrtievesave+"'" +" where id='"+defdefT9+"'");
String quer= "UPDATE [androidtest].[dbo].[nameAndroid] set barcode='"+dbvariable2+"'"+", name='"+retrtievesave+"'" +" where id='"+defdefT9+"'";
System.out.println(quer);
Log.d("test21", "21");
EditText deFact24456 = (EditText) findViewById(R.id.db_task3);
deFact24456.setText(retrtievesave);
}
catch (Exception e)
{
e.printStackTrace();
}
}//end of save() function
}