How to retrieve and view data from a SQL Server using sqljdbc library in Android? -


i having troubles in "how to's" of connecting prepoppulated database being used our asp.net application.

so, problem have used sqljdbc4.jar library try connect database , during exceptions , cant seem find solution it. appreciate if correct code or give me regarding it. cant seem find solution anywhere.

below code calling in oncreate block in mainactivity in getting os.networkonmainthreadexception

 public void testdb() {  textview tv = (textview) this.findviewbyid(r.id.text_view);  // create variable connection string.  string connectionurl = "jdbc:sqlserver://localhost:1433;" +          "databasename=cafeapp;user=sunny;password=";  string result = "database connection success\n";   // declare jdbc objects.  connection con = null;  statement stmt = null;  resultset rs = null;  resultsetmetadata rsmd;   try {      // establish connection.      class.forname("com.microsoft.sqlserver.jdbc.sqlserverdriver");      con = drivermanager.getconnection(connectionurl);       // create , execute sql statement returns data.      string sql = "select top 10 * inventory.inventory_name";      stmt = con.createstatement();      rs = stmt.executequery(sql);      rsmd = rs.getmetadata();       // iterate through data in result set , display it.      while (rs.next()) {         // system.out.println(rs.getstring(4) + " " + rs.getstring(6));          result += rsmd.getcolumnname(1) + ": " + rs.getint(1) + "\n";          result += rsmd.getcolumnname(2) + ": " + rs.getstring(2) + "\n";          result += rsmd.getcolumnname(3) + ": " + rs.getint(3) + "\n";       }      tv.settext(result);  }   // handle errors may have occurred.  catch (exception e) {      e.printstacktrace();      tv.settext(e.tostring());  } {      if (rs != null) try {          rs.close();      } catch(exception e) {      }      if (stmt != null) try {          stmt.close();      } catch(exception e) {      }      if (con != null) try {          con.close();      } catch(exception e) {      }  }}

you have use asynctask... because android doesn't allow networking task on it's main thread.

just put testdb() method on separate thread.

new thread(new runnable() {             @override             public void run() {                 testdb()             }         }).start();

Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i...
Read more