我在没有任何服务器帮助的情况下直接与mysql数据库连接。当我尝试使用模拟器与mysql连接时，它工作正常。但是当我使用手机时，会引发一些异常。我不知道是什么问题。请帮我解决一下这个。
这是我的代码：
Connection con;
PreparedStatement ps;
Statement st;
ResultSet rs;
String val = "";
Context cont = this;
View menuItemView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Thread on=new Thread(){
@Override
public void run(){
Log.i("Thread","Running");
try {
Class.forName("com.mysql.jdbc.Driver");
Log.i("Connection","connected with jdbc");
con = DriverManager.getConnection("jdbc:mysql://192.168.1.2:3306/outsidelaundry", "vino" , "vino");
Log.i("Connection","connected with database");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "connected", Toast.LENGTH_LONG).show();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
};
on.start();
}
logcat错误说：
09-26 14:46:05.474: E/StrictMode(809): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40cec370 that was originally bound here
09-26 14:46:05.474: E/StrictMode(809): at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
09-26 14:46:05.474: E/StrictMode(809): at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
09-26 14:46:05.474: E/StrictMode(809): at android.app.ContextImpl.bindService(ContextImpl.java:1418)
09-26 14:46:05.474: E/StrictMode(809): at android.app.ContextImpl.bindService(ContextImpl.java:1407)
09-26 14:46:05.474: E/StrictMode(809): at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
09-26 14:46:05.474: E/StrictMode(809): at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
09-26 14:46:05.474: E/StrictMode(809): at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
09-26 14:46:05.474: E/StrictMode(809): at com.android.emailcommon.service.ServiceProxy.test(ServiceProxy.java:191)
09-26 14:46:05.474: E/StrictMode(809): at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1850)
09-26 14:46:05.474: E/StrictMode(809): at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
09-26 14:46:05.474: E/StrictMode(809): at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
09-26 14:46:05.474: E/StrictMode(809): at android.os.AsyncTask$2.call(AsyncTask.java:287)
09-26 14:46:05.474: E/StrictMode(809): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
09-26 14:46:05.474: E/StrictMode(809): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
09-26 14:46:05.474: E/StrictMode(809): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
09-26 14:46:05.474: E/StrictMode(809): at java.lang.Thread.run(Thread.java:856)
09-26 14:46:05.484: W/ActivityManager(339): Unbind failed: could not find connection for android.os.BinderProxy@4102be08
解决方案：我找到了解决此问题的方法。为了直接将移动设备与mysql数据库连接以发送/接收数据，您首先应该在wifi上，不仅如此，还要在设备中启用后台数据和自动同步。后台数据是一种允许在设备内传输数据的数据。
最佳答案
我可能不记得正确了。我认为我在将解决方案添加到Application时遇到了类似的问题：
@Override
public void onCreate() {
try {
Class.forName("android.os.AsyncTask");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
super.onCreate();
}