我是android开发的新手。我想使用 php mysql 和 json 进行登录验证。
我只负责 PHP、MySql 和 json 部分。
如果用户在 android app 中输入用户名和密码，则需要使用 PHP 和 Mysql 检查用户表，并且只需要使用 json 发送 1 或 0 之类的状态码。
如果用户名和密码匹配，则 status = 1 需要发送到 android app 编码，否则为 0。
状态检查过程需要在 Android Coding 部分完成。
如果 status = 1 并且我需要重定向到 android app 中的另一个窗口。
我看过很多 tuts，但没有任何帮助。
所以，请帮助我如何将状态从PHP 发送到 android 应用程序以及如何获取该状态并在 android 中验证。
我已经为我的项目完成了这段代码。它工作正常。试试看。
登录2.php
<?php
$un=$_POST['username'];
$pw=$_POST['password'];
//connect to the db
$host="localhost"; // Host name
$user="root"; // Mysql username
$pswd=""; // Mysql password
$db="database_name"; // Database name
$tbl_name="user_info"; // Table name
$conn = mysql_connect($host, $user, $pswd);
mysql_select_db($db, $conn);
//run the query to search for the username and password the match
//$query = "SELECT * FROM $tbl_name WHERE first_name = '$un' AND password = '$pw'";
$query = "SELECT emp_id FROM $tbl_name WHERE first_name = '$un' AND password = '$pw'";
$result = mysql_query($query) or die("Unable to verify user because : " . mysql_error());
//this is where the actual verification happens
if(mysql_num_rows($result) > 0)
echo mysql_result($result,0); // for correct login response
else
echo 0; // for incorrect login response
?>
Android login.java 的 Java 代码
取两个edittext和按钮，然后在按钮上单击放置此代码。如果您不想将用户名、emp_id 保存到整个应用程序，请删除 saveperference 方法。
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("username", username
.getText().toString()));
postParameters.add(new BasicNameValuePair("password", password
.getText().toString()));
// String valid = "1";
String response = null;
try {
// "http://10.0.2.2//Mobile/login2.php"
response = CustomHttpClient
.executeHttpPost(
"http://10.0.2.2//Mobile/login2.php",
postParameters);
// now in result you will have the response from php file either 0 or 1.
result = response.toString();
// res = res.trim();
result = result.replaceAll("\\s+", "");
// error.setText(res);
if (!result.equals("0")) {
SavePreferences("name", "pass", "emp_id", username
.getText().toString(), password.getText()
.toString());
Intent in = new Intent(Login.this, MainScreen.class);
// LoadPreferences();
error.setText("");
startActivity(in);
}
else
error.setText("Incorrect Username or Password");
} catch (Exception e) {
// un.setText(e.toString());
}
}
CustomHttpClient.java
public class CustomHttpClient {
/** The time it takes for our client to timeout */
public static final int HTTP_TIMEOUT = 30 * 1000; // milliseconds
/** Single instance of our HttpClient */
private static HttpClient mHttpClient;
/**
* Get our single instance of our HttpClient object.
*
* @return an HttpClient object with connection parameters set
*/
private static HttpClient getHttpClient() {
if (mHttpClient == null) {
mHttpClient = new DefaultHttpClient();
final HttpParams params = mHttpClient.getParams();
HttpConnectionParams.setConnectionTimeout(params, HTTP_TIMEOUT);
HttpConnectionParams.setSoTimeout(params, HTTP_TIMEOUT);
ConnManagerParams.setTimeout(params, HTTP_TIMEOUT);
}
return mHttpClient;
}
/**
* Performs an HTTP Post request to the specified url with the
* specified parameters.
*
* @param url The web address to post the request to
* @param postParameters The parameters to send via the request
* @return The result of the request
* @throws Exception
*/
public static String executeHttpPost(String url, ArrayList<NameValuePair> postParameters) throws Exception {
BufferedReader in = null;
try {
HttpClient client = getHttpClient();
HttpPost request = new HttpPost(url);
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
request.setEntity(formEntity);
HttpResponse response = client.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
String result = sb.toString();
return result;
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* Performs an HTTP GET request to the specified url.
*
* @param url The web address to post the request to
* @return The result of the request
* @throws Exception
*/
public static String executeHttpGet(String url) throws Exception {
BufferedReader in = null;
try {
HttpClient client = getHttpClient();
HttpGet request = new HttpGet();
request.setURI(new URI(url));
HttpResponse response = client.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
String result = sb.toString();
return result;
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
您的 android 客户端必须对您的 PHP 脚本执行 Http 发布，该脚本返回状态代码。您的脚本将该请求视为任何其他发布请求。客户端从服务器接收结果，并进行所需的计算。
只需遵循此代码，我认为它的工作正常...
$email = isset($_REQUEST['email'])?urldecode($_REQUEST['email']):"";
$passwd= isset($_REQUEST['passwd'])?urldecode($_REQUEST['passwd']):"";
if($email==""||$passwd=="" )
{
$return_data['status'] = 0;
}
else
{
$user_info="select id from table name WHERE email=$emailAND passwd=$passwd";
if($user_info)
{
$return_data['status'] = 1;
}
else
{
$return_data['status'] = 0;
}
}
echo json_encode($return_data);