我正坐在一个小型 Android 应用程序中检查用户登录信息。我一直在努力解决这个问题。如果有人可以帮助我，我将不胜感激。提前致谢。我收到此错误 login_invalid_error 下有一个好的按钮。
这是我的PHP。
<?php
$emailAddress;
$password;
// Change the following settings based on your db
// Im assuming your are using MySQL
$dbHost = "localhost";
$dbUser = "root";
$dbPassword = "123456";
$userTableName = "tb_users";
// check if params 'emailAddress' and 'password' are set.
if (isset($_REQUEST['emailAddress']) &&
isset($_REQUEST['password']))
{
$con = mysql_connect($dbHost ,$dbUser,$dbPassword);
if(!$con) die('Error ' . mysqli_connect_error);
mysql_select_db("andrioldlogin",$con) or die("can't select the database");
$emailAddress = $_REQUEST['emailAddress'];
// Compares passwords based on md5 encryption.
$password = $_REQUEST['password'];
// SQL statement assuming your user table has fields
// "email_address" and "password"
$sql = "SELECT id FROM tb_users WHERE email_address = '$emailAddress' AND password = '$password'";
$result = mysql_query($sql);
if($result)
{
$row = mysql_num_rows($result);
if($row == 1)
{
// 202 header code response if there is a matching row.
header("Status: 202 Accepted");
// $row[0] will be id from user logging in
die($row[0]);
}
else
{
header("Status: 401 Unauthorized");
echo "Error logging in 1.";
}
}
else
{
header("Status: 401 Unauthorized");
echo "Error logging in 2.";
}
}
// if values are unset
else
{
header("Status: 401 Unauthorized");
echo "Invalid Data.";
}
这是我的 MainActivity.java
public class MainActivity extends Activity {
protected static final int LOGIN_REQUEST_CODE = 0;
protected static final int RECOVER_REQUEST_CODE = 1;
protected static final int REGISTER_REQUEST_CODE = 2;
public static final int LOGOUT_RESULT_CODE = 2;
SharedPreferences sharedPreferences;
private EditText etEmailAddress;
private EditText etPassword;
private Button bLogin;
private final Class<?> LOGIN_DESTINATION = DestinationActivity.class;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPreferences = getPreferences(MODE_PRIVATE);
super.onCreate(savedInstanceState);
// check if user is logged in already
if( sharedPreferences.getBoolean("user_logged_in", false))
{
// user is logged in, bypass activity
startActivityForResult(
new Intent(MainActivity .this, LOGIN_DESTINATION),
LOGIN_REQUEST_CODE);
}
setContentView(R.layout.activity_main);
bLogin = (Button) findViewById(R.id.button1);
etEmailAddress = (EditText) findViewById(R.id.editText1);
etPassword = (EditText) findViewById(R.id.editText2);
bLogin.setOnClickListener(loginOnClickListener);
}
protected OnClickListener loginOnClickListener = new OnClickListener()
{
public void onClick(View v)
{
ProgressDialog progressDialog = new ProgressDialog(MainActivity .this);
progressDialog.setMessage("Logging in...");
progressDialog.setCancelable(false);
LoginTask loginTask = new LoginTask(MainActivity.this, progressDialog);
loginTask.execute(
etEmailAddress.getText().toString(),
etPassword.getText().toString());
}
};
public void showLoginError(String result)
{
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setPositiveButton(R.string.okay, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setMessage(R.string.login_invalid_error);
AlertDialog alert = builder.create();
alert.setCancelable(false);
alert.show();
}
// do some stuff after user logs in
public void login(int id)
{
sharedPreferences.edit().putBoolean("user_logged_in", true).commit();
startActivityForResult(
new Intent(MainActivity.this, LOGIN_DESTINATION),
LOGIN_REQUEST_CODE);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
登录任务.java
package com.example.loginwithasynctask;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
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 android.app.ProgressDialog;
import android.os.AsyncTask;
import android.util.Log;
public class LoginTask extends AsyncTask<String, Void, Integer> {
private ProgressDialog progressDialog;
private MainActivity activity;
private String id = "";
public LoginTask(MainActivity activity, ProgressDialog progressDialog)
{
this.activity = activity;
this.progressDialog = progressDialog;
}
@Override
protected void onPreExecute()
{
progressDialog.show();
}
@Override
protected Integer doInBackground(String... arg0)
{
String result = "";
int responseCode = 0;
try
{
HttpClient client = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.1.139/loginwithasynctask.php");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("emailAddress", arg0[0]));
nameValuePairs.add(new BasicNameValuePair("password", arg0[1]));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
int executeCount = 0;
HttpResponse response;
do
{
//progressDialog.setMessage("Logging in.. ("+(executeCount+1)+"/5)");
// Execute HTTP Post Request
executeCount++;
response = client.execute(httppost);
responseCode = response.getStatusLine().getStatusCode();
// If you want to see the response code, you can Log it
// out here by calling:
Log.d("Sabawon You are here bro", "statusCode: " + responseCode);
} while (executeCount < 5 && responseCode == 408);
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
String line;
while ((line = rd.readLine()) != null)
{
result = line.trim();
Log.d("result is ", result);
}
id = result;
}
catch (Exception e) {
responseCode = 408;
}
return responseCode;
}
@Override
protected void onPostExecute(Integer headerCode)
{
try{
int executeCount = 0;
progressDialog.setMessage("Logging in.. ("+(executeCount+1)+"/5)");
//Log.d("Sabawon You are here bro", "statusCode: " + responseCode);
progressDialog.dismiss();
}
catch (Exception e) {
e.printStackTrace();
}
if(headerCode == 202)
activity.login((Integer.parseInt(id)));
else
activity.showLoginError("");
}
}
这是我的 LogCat....
05-17 14:18:34.626: D/InputEventConsistencyVerifier(1644): KeyEvent: ACTION_UP but key was not down.
05-17 14:18:34.626: D/InputEventConsistencyVerifier(1644): android.widget.EditText@41203828
05-17 14:18:34.626: D/InputEventConsistencyVerifier(1644): 0: sent at 15560804000000, KeyEvent { action=ACTION_UP, keyCode=KEYCODE_M, scanCode=50, metaState=0, flags=0x8, repeatCount=0, eventTime=15560804, downTime=15560804, deviceId=0, source=0x101 }
05-17 14:18:34.736: D/InputEventConsistencyVerifier(1644): KeyEvent: ACTION_UP but key not down.
05-17 14:18:34.736: D/InputEventConsistencyVerifier(1644): android.widget.EditText@41203828
05-17 14:18:34.736: D/InputEventConsistencyVerifier(1644): 0: sent at 15560942000000, KeyEvent { action=ACTION_UP, keyCode=KEYCODE_TAB, scanCode=15, metaState=0, flags=0x8, repeatCount=0, eventTime=15560942, downTime=15560804, deviceId=0, source=0x101 }
05-17 14:18:34.736: D/InputEventConsistencyVerifier(1644): -- recent events --
05-17 14:18:34.736: D/InputEventConsistencyVerifier(1644): 1: sent at 15560804000000, (unhandled) KeyEvent { action=ACTION_UP, keyCode=KEYCODE_M, scanCode=50, metaState=0, flags=0x80000008, repeatCount=0, eventTime=15560804, downTime=15560804, deviceI source=0x101 }
05-17 14:18:44.369: D/dalvikvm(1644): GC_CONCURRENT freed 263K, 5% free 8168K/8519K, paused 135ms+82ms, total 348ms
05-17 14:18:46.867: D/Sabawon You are here bro(1644): statusCode: 200
05-17 14:18:46.927: W/System.err(1644): java.lang.NumberFormatException: Invalid int: ""
05-17 14:18:46.927: W/System.err(1644): java.lang.Integer.invalidInt(Integer.java:138)
05-17 14:18:46.937: W/System.err(1644):at java.lang.Integer.parseInt(Integer.java:359)
05-17 14:18:46.937: W/System.err(1644): at java.lang.Integer.parseInt(Integer.java:332)
05-17 14:18:46.937: W/System.err(1644):com.example.loginwithasynctask.LoginTask.doInBackground(LoginTask.java:75)
05-17 14:18:46.937: W/System.err(1644):atcom.example.loginwithasynctask.LoginTask.doInBackground(LoginTask.jav:1)
05-17 14:18:46.937: W/System.err(1644): at android.os.AsyncTask$2.call(AsyncTask.java:287)
05-17 14:18:46.937: W/System.err(1644):at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-17 14:18:46.937: W/System.err(1644): at java.util.concurrent.FutureTask.run(FutureTask.java:137)05-17 14:18:46.998: W/System.err(1644): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
05-17 14:18:46.998: I/Choreographer(1644): Skipped 31 frames! The application may be doing too much work on its main thread.
05-17 14:18:47.007: W/System.err(1644): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
05-17 14:18:47.067: W/System.err(1644): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
05-17 14:18:47.067: W/System.err(1644): at java.lang.Thread.run(Thread.java:856)
05-17 14:18:47.147: I/Choreographer(1644): Skipped 35 frames! The application may be doing too much work on its main thread.
05-17 14:18:47.477: I/Choreographer(1644): Skipped 82 frames! The application may be doing too much work on its main thread.
05-17 14:18:47.807: I/Choreographer(1644): Skipped 84 frames! The application may be doing too much work on its main thread.