尝试将我的Android应用程序连接到我的wamp服务器上的MySQL，当我在手机上运行应用程序时，我得到以下异常...
11-11 18:13:47.732: E/AndroidRuntime(15120): FATAL EXCEPTION: main
11-11 18:13:47.732: E/AndroidRuntime(15120): Process: com.example.loginactivity, PID: 15120
11-11 18:13:47.732: E/AndroidRuntime(15120): android.os.NetworkOnMainThreadException
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1156)
11-11 18:13:47.732: E/AndroidRuntime(15120): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
11-11 18:13:47.732: E/AndroidRuntime(15120): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
11-11 18:13:47.732: E/AndroidRuntime(15120): at libcore.io.IoBridge.connect(IoBridge.java:112)
11-11 18:13:47.732: E/AndroidRuntime(15120): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
11-11 18:13:47.732: E/AndroidRuntime(15120): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:460)
11-11 18:13:47.732: E/AndroidRuntime(15120): at java.net.Socket.connect(Socket.java:833)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
11-11 18:13:47.732: E/AndroidRuntime(15120): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
11-11 18:13:47.732: E/AndroidRuntime(15120): at library.JSONParser.getJSONFromUrl(JSONParser.java:42)
11-11 18:13:47.732: E/AndroidRuntime(15120): at library.UserFunctions.registerUser(UserFunctions.java:61)
11-11 18:13:47.732: E/AndroidRuntime(15120): at com.example.loginactivity.RegisterActivity$1.onClick(RegisterActivity.java:57)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.view.View.performClick(View.java:4633)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.view.View$PerformClick.run(View.java:19330)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.os.Handler.handleCallback(Handler.java:733)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.os.Handler.dispatchMessage(Handler.java:95)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.os.Looper.loop(Looper.java:157)
11-11 18:13:47.732: E/AndroidRuntime(15120): at android.app.ActivityThread.main(ActivityThread.java:5356)
11-11 18:13:47.732: E/AndroidRuntime(15120): at java.lang.reflect.Method.invokeNative(Native Method)
11-11 18:13:47.732: E/AndroidRuntime(15120): at java.lang.reflect.Method.invoke(Method.java:515)
11-11 18:13:47.732: E/AndroidRuntime(15120): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
11-11 18:13:47.732: E/AndroidRuntime(15120): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
11-11 18:13:47.732: E/AndroidRuntime(15120): at dalvik.system.NativeStart.main(Native Method)
这是抛出异常的类中的代码..
public class RegisterActivity extends Activity {
Button btnRegister;
Button btnLinkToLogin;
EditText inputFullName;
EditText inputEmail;
EditText inputPassword;
TextView registerErrorMsg;
// JSON Response node names
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
private static String KEY_UID = "uid";
private static String KEY_NAME = "name";
private static String KEY_EMAIL = "email";
private static String KEY_CREATED_AT = "created_at";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
// Importing all assets like buttons, text fields
inputFullName = (EditText) findViewById(R.id.registerName);
inputEmail = (EditText) findViewById(R.id.registerEmail);
inputPassword = (EditText) findViewById(R.id.registerPassword);
btnRegister = (Button) findViewById(R.id.btnRegister);
btnLinkToLogin = (Button) findViewById(R.id.btnLinkToLoginScreen);
registerErrorMsg = (TextView) findViewById(R.id.register_error);
// Register Button Click event
btnRegister.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String name = inputFullName.getText().toString();
String email = inputEmail.getText().toString();
String password = inputPassword.getText().toString();
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.registerUser(name, email, password);
// check for login response
try {
if (json.getString(KEY_SUCCESS) != null) {
registerErrorMsg.setText("");
String res = json.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1){
// user successfully registred
// Store user details in SQLite Database
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
JSONObject json_user = json.getJSONObject("user");
// Clear all previous data in database
userFunction.logoutUser(getApplicationContext());
db.addUser(json_user.getString(KEY_NAME), json_user.getString(KEY_EMAIL), json.getString(KEY_UID), json_user.getString(KEY_CREATED_AT));
// Launch Dashboard Screen
Intent dashboard = new Intent(getApplicationContext(), DashboardActivity.class);
// Close all views before launching Dashboard
dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(dashboard);
// Close Registration Screen
finish();
}else{
// Error in registration
registerErrorMsg.setText("Error occured in registration");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
// Link to Login Screen
btnLinkToLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),
LoginActivity.class);
startActivity(i);
// Close Registration View
finish();
}
});
}
}
对此的任何帮助将不胜感激：）
答案 0 :(得分：-1)
正如jimmy0251正确提到的...... Android阻止你在主线程上建立网络连接......你需要将它外包给一个单独的线程..请参阅http://developer.android.com/reference/android/os/AsyncTask.html了解更多信息