两天以来我的android项目已经出现问题了。 我实现了身份验证测试。我的类从editText接收一个数字，然后将此问题带回到php脚本，该脚本负责检查数据库中是否收到该号码。
这是我的班级
package com.androidproject.myFirstApp;
import android.app.Activity;
import android.app.AlertDialog;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
public class LoginActivity extends Activity
{
EditText inputpinCode;
CheckBox checkBox;
Button btnLogin;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
setTitle("Welcome");
inputpinCode = (EditText) findViewById(R.id.loginpinCode);
checkBox = (CheckBox)findViewById(R.id.cbRememberMe);
btnLogin = (Button) findViewById(R.id.btnLogin);
SharedPreferences pref = getSharedPreferences(PREFS_NOM,MODE_PRIVATE);
String pinCode = pref.getString(PREF_pinCode, "");
String checked = pref.getString(PREF_CHECKED, "");
inputpinCode.setText(pinCode);
checkBox.setChecked(Boolean.parseBoolean(checked));
btnLogin.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
boolean error = true;
@SuppressWarnings("unused")
long val = 0;
String pinCode = inputpinCode.getText().toString();
if (!TextUtils.isEmpty(pinCode)) {
try {
val = Long.valueOf(pinCode);
error = false;
}
catch(NumberFormatException e) {
Log.w("Error", e);
}
}
if (error) {
Toast.makeText(getBaseContext(),"Please enter your pin code.",Toast.LENGTH_SHORT).show();
}else{
if ((pinCode != null) && (pinCode.trim().length() == 8)) {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("tag", "login"));
nameValuePairs.add(new BasicNameValuePair("pinCode", pinCode));
try
{
Boolean isInternetPresent = false;
ConnectionDetector cd;
cd = new ConnectionDetector(getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
if (isInternetPresent) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://matanddin.zz.mu/android_app/auth.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = reader.readLine();
sb.append(line + "\n");
is.close();
String result = sb.toString();
JSONObject jObj = new JSONObject(result);
if (jObj.getString(KEY_SUCCESS) != null)
{
String res = jObj.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1)
{
//Add user in db sqlite
Toast.makeText(getApplicationContext(), "User ok!!!", Toast.LENGTH_SHORT).show();
}
/* Si il vaut 0, user inconnu*/
else
{
AlertDialog buildexit = new AlertDialog.Builder(LoginActivity.this)
.setTitle("Bad user!")
.setIcon(R.drawable.ic_launcher)
.setMessage("I don't know you. You want create à new account?")
.setPositiveButton("Yes", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent i = new Intent(LoginActivity.this, RegisterActivity.class);
startActivity(i);
finish();
}
})
.setNegativeButton("No", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.create();
buildexit.show();
}
}
}else {
Toast.makeText(getBaseContext(),"Requiered internet connection",Toast.LENGTH_SHORT).show();
}
}
catch(Exception e)
{
Log.w("W", e);
Toast.makeText(getBaseContext(),"error.",Toast.LENGTH_SHORT).show();
}
}else{
Toast.makeText(getBaseContext(),"pin incorrect.",Toast.LENGTH_SHORT).show();
return;
}
}
}
});
}
}
查询不成功，这里是eclipse回答
09-21 07:58:02.879: W/W(8410): android.os.NetworkOnMainThreadException
09-21 07:58:02.879: W/W(8410): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
09-21 07:58:02.879: W/W(8410): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
09-21 07:58:02.879: W/W(8410): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
09-21 07:58:02.879: W/W(8410): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
09-21 07:58:02.879: W/W(8410): at java.net.InetAddress.getAllByName(InetAddress.java:220)
09-21 07:58:02.879: W/W(8410): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
09-21 07:58:02.879: W/W(8410): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
09-21 07:58:02.879: W/W(8410): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
Ps：谢谢你给我一点时间！
答案 0 :(得分：0)
如果Asynctask不起作用，请尝试在onCreate方法中添加它
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);