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http连接中的Android身份验证错误android.os.networkonmainthreadException

转载 作者:行者123 更新时间:2023-11-29 08:26:24 27 4
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我开发了一个使用 android、Json 和 Mysql 登录的代码,我的代码在模拟器(android 2.1)中工作,但在智能手机(4.1)中崩溃,这是日志猫中的错误

error in http connection android.os.networkonmainthreadexception

这是我的代码,如果有人可以帮助我更改一些内容以允许我的应用程序适用于所有 Android 版本。提前致谢。

public class ConnexionmysqlActivity extends Activity {

private static final String strURL = "http://mercure.comze.com/mercure/logi.php";
// private String result ;
private Button connexion ;
private EditText Logon ;
private EditText password ;
private JSONArray jArray;
private JSONObject json_data;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
Button connexion = (Button) findViewById(R.id.btn);
final EditText Logon = (EditText) findViewById(R.id.login);
final EditText password = (EditText) findViewById(R.id.mdpt);


connexion.setOnClickListener(new View.OnClickListener() {

@SuppressWarnings("unused")
public void onClick(View v) {
String result =null;
InputStream is = null;
StringBuilder sb = new StringBuilder();
ArrayList<NameValuePair> nameValuePairs=new ArrayList<NameValuePair> ();
nameValuePairs.add(new BasicNameValuePair("user",Logon.getText().toString()));

try{

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(strURL);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection " + e.toString());
}
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);

String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");

}
is.close();
result=sb.toString();

}catch(Exception e){
Log.e("log_tag", "Error in http connection " + e.toString());
}
String essai=result.substring(0, 4) ;
try {
if (result.matches("<br >")){
essai=result.substring(0, 2) ;
}
JSONArray jArray = new JSONArray(result);
int b=jArray.length();



JSONObject json_data = jArray.getJSONObject(0);


String mot_pass = json_data.getString("mdp").toString();
String login = json_data.getString("login").toString();
if (mot_pass.equals(password.getText().toString()) ){

Intent principale =new Intent(ConnexionmysqlActivity.this,compte.class);
principale.putExtra("login",login);
startActivity(principale);

}
else {

Toast.makeText(ConnexionmysqlActivity.this, "mot de pass invalide ", Toast.LENGTH_LONG).show();
}


}catch(JSONException e){
// Log.e("log_tag", "Error parsing data " + e.toString());
Toast.makeText(ConnexionmysqlActivity.this, "Utilisateur Inexistant ", Toast.LENGTH_LONG).show();
}

}
});

}
}

编辑:我在代码中做了一些更改(使用 asyncTask),但这次我的代码也不起作用,这是我所做的更改:

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
Button connexion = (Button) findViewById(R.id.btn);
final EditText Logon = (EditText) findViewById(R.id.login);
final EditText password = (EditText) findViewById(R.id.mdpt);


connexion.setOnClickListener(new View.OnClickListener() {

@SuppressWarnings("unused")
public void onClick(View v) {


new callServiceTask().execute();

}
});

}

class callServiceTask extends AsyncTask<Void, Void, Void>
{
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ConnexionmysqlActivity.this);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Void doInBackground(Void... params) {

// call web service
ArrayList<NameValuePair> nameValuePairs=new ArrayList<NameValuePair> ();
nameValuePairs.add(new BasicNameValuePair("user",Logon.getText().toString()));

try{

HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(strURL);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection " + e.toString());
}
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);

String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");

}
is.close();
result=sb.toString();

}catch(Exception e){
Log.e("log_tag", "Error in http connection " + e.toString());
}
String essai=result.substring(0, 4) ;
try {
if (result.matches("<br >")){
essai=result.substring(0, 2) ;
}
JSONArray jArray = new JSONArray(result);
int b=jArray.length();



JSONObject json_data = jArray.getJSONObject(0);


String mot_pass = json_data.getString("mdp").toString();
String login = json_data.getString("login").toString();
if (mot_pass.equals(password.getText().toString()) ){

Intent principale =new Intent(ConnexionmysqlActivity.this,compte.class);
principale.putExtra("login",login);
startActivity(principale);

}
else {

Toast.makeText(ConnexionmysqlActivity.this, "mot de pass invalide ", Toast.LENGTH_LONG).show();
}


}catch(JSONException e){
// Log.e("log_tag", "Error parsing data " + e.toString());
Toast.makeText(ConnexionmysqlActivity.this, "Utilisateur Inexistant ", Toast.LENGTH_LONG).show();
}
return null;
}

@Override
protected void onPostExecute(Void resulta) {

//bind data in lisview or any other componet
pDialog.dismiss();
super.onPostExecute(resulta);
}

}

日志猫:

07-23 08:16:53.028: W/dalvikvm(15420): threadid=11: thread exiting with uncaught exception (group=0x2b542210)
07-23 08:16:53.048: E/AndroidRuntime(15420): FATAL EXCEPTION: AsyncTask #1
07-23 08:16:53.048: E/AndroidRuntime(15420): java.lang.RuntimeException: An error occured while executing doInBackground()
07-23 08:16:53.048: E/AndroidRuntime(15420): at android.os.AsyncTask$3.done(AsyncTask.java:278)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-23 08:16:53.048: E/AndroidRuntime(15420): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.lang.Thread.run(Thread.java:856)
07-23 08:16:53.048: E/AndroidRuntime(15420): Caused by: java.lang.NullPointerException
07-23 08:16:53.048: E/AndroidRuntime(15420): at com.project.mercureproject.ConnexionmysqlActivity$callServiceTask.doInBackground(ConnexionmysqlActivity.java:98)
07-23 08:16:53.048: E/AndroidRuntime(15420): at com.project.mercureproject.ConnexionmysqlActivity$callServiceTask.doInBackground(ConnexionmysqlActivity.java:1)
07-23 08:16:53.048: E/AndroidRuntime(15420): at android.os.AsyncTask$2.call(AsyncTask.java:264)
07-23 08:16:53.048: E/AndroidRuntime(15420): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-23 08:16:53.048: E/AndroidRuntime(15420): ... 5 more

最佳答案

添加您的 oncreate 方法此代码:

StrictMode.ThreadPolicy 策略 = new StrictMode.ThreadPolicy.Builder().permitAll().build();StrictMode.setThreadPolicy(策略);

关于http连接中的Android身份验证错误android.os.networkonmainthreadException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17801946/

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