0
我试图使用AsyncTask中的jtds连接到mssql服务器数据库。在行,Android:Async dobackground()在连接数据库时无法正常工作
con = DriverManager.getConnection(connString);
当谈到这条线,经过3或4秒AsyncTask.java文件上执行功能和应用程序崩溃后
。
这里就是我特林在歌厅连接线走那么远
protected Void doInBackground(Void... params)
{
Connection con = null;
try {
String driver = "net.sourceforge.jtds.jdbc.Driver";
Class.forName(driver).newInstance();
String connString = "jdbc:jtds:sqlserver://dbandroid.mssql.somee.com:1433/dbandroid;";
con = DriverManager.getConnection(connString,"username","password");
Log.i("SQLConn", "IsClosed:" + con.isClosed());
}
catch(Exception ex)
{
Log.e("SQLServerConn",ex.getMessage());
}
return null;
}
后3〜4秒说到这里AsyncTask.java
public synchronized void execute(final Runnable r) {
mTasks.offer(new Runnable() {
public void run() {
try {....
和SQL连接没有问题堂妹我用相同的用户名和密码将它与SSMS连接起来
错误日志
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: Process: com.example.hamza.sunshine, PID: 15690
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: java.lang.RuntimeException: An error occured while executing doInBackground()
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at android.os.AsyncTask$3.done(AsyncTask.java:300)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.FutureTask.run(FutureTask.java:242)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.lang.Thread.run(Thread.java:841)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: Caused by: java.lang.VerifyError: net/sourceforge/jtds/jdbc/TdsCore
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:359)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.sql.DriverManager.getConnection(DriverManager.java:179)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.sql.DriverManager.getConnection(DriverManager.java:213)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at com.example.hamza.sunshine.MainActivity$SQLServerConn.doInBackground(MainActivity.java:270)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at com.example.hamza.sunshine.MainActivity$SQLServerConn.doInBackground(MainActivity.java:258)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at android.os.AsyncTask$2.call(AsyncTask.java:288)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
02-23 05:18:03.704 15690-15737/com.example.hamza.sunshine E/AndroidRuntime: at java.lang.Thread.run(Thread.java:841)
请把你的崩溃报告粘贴在这里,以帮助你更好。 –
我不知道在哪里得到崩溃报告,我是新的 –
它将在'LogCat'选项卡中可用。当你的应用程序崩溃的时候,你会在logcat中看到错误日志。在这里复制粘贴一个。 –