所以我正在开发一个小型的Android应用程序，并且非常适合编码。到目前为止，我遵循了一个教程，可以让用户登录/注册，并将该信息存储/检索到MYSQL数据库中。问题是我需要添加代码来存储位置，我感到困惑。
以下是我所拥有的大部分内容，并希望得到一些帮助：
我的数据库设置为：uid - name - email - password - salt - created_at - updated_at - loclat - loclong
主要活动类：
public class DashboardActivity extends Activity {
UserFunctions userFunctions;
Button btnLogout;
Button btnloc;
GPSTracker gps;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* Dashboard Screen for the application
* */
// Check login status in database
userFunctions = new UserFunctions();
if(userFunctions.isUserLoggedIn(getApplicationContext())){
// user already logged in show databoard
setContentView(R.layout.dashboard);
gps = new GPSTracker(DashboardActivity.this);
if(gps.canGetLocation()){
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
};
btnLogout = (Button) findViewById(R.id.btnLogout);
btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
userFunctions.logoutUser(getApplicationContext());
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
});
}else{
// user is not logged in show login screen
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
}
}
用户函数java文件：
public class UserFunctions {
private JSONParser jsonParser;
// Testing in localhost using wamp or xampp
// use http://10.0.2.2/ to connect to your localhost ie http://localhost/
private static String loginURL = "url removed";
private static String registerURL = "url removed";
private static String login_tag = "login";
private static String register_tag = "register";
// constructor
public UserFunctions(){
jsonParser = new JSONParser();
}
/**
* function make Login Request
* @param email
* @param password
* */
public JSONObject loginUser(String email, String password){
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", login_tag));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
JSONObject json = jsonParser.getJSONFromUrl(loginURL, params);
// return json
// Log.e("JSON", json.toString());
return json;
}
/**
* function make Login Request
* @param name
* @param email
* @param password
* */
public JSONObject registerUser(String name, String email, String password){
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", register_tag));
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
// getting JSON Object
JSONObject json = jsonParser.getJSONFromUrl(registerURL, params);
// return json
return json;
}
/**
* Function get Login status
* */
public boolean isUserLoggedIn(Context context){
DatabaseHandler db = new DatabaseHandler(context);
int count = db.getRowCount();
if(count > 0){
// user logged in
return true;
}
return false;
}
/**
* Function to logout user
* Reset Database
* */
public boolean logoutUser(Context context){
DatabaseHandler db = new DatabaseHandler(context);
db.resetTables();
return true;
}
}
JSON文件
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "n");
}
is.close();
json = sb.toString();
Log.e("JSON", json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
世界服务
public class LocalWordService extends Service {
private final IBinder mBinder = new MyBinder();
private ArrayList<String> list = new ArrayList<String>();
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Random random = new Random();
if (random.nextBoolean()) {
list.add("Linux");
}
if (random.nextBoolean()) {
list.add("Android");
}
if (random.nextBoolean()) {
list.add("iPhone");
}
if (random.nextBoolean()) {
list.add("Windows7");
}
if (list.size() >= 20) {
list.remove(0);
}
return Service.START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent arg0) {
return mBinder;
}
public class MyBinder extends Binder {
public LocalWordService getService() {
return LocalWordService.this;
}
}
public List<String> getWordList() {
return list;
}
}
Dbase.php文件：
if (isset($_POST['tag']) && $_POST['tag'] != '') {
// get tag
$tag = $_POST['tag'];
// include db handler
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
// response Array
$response = array("tag" => $tag, "success" => 0, "error" => 0);
// check for tag type
if ($tag == 'login') {
// Request type is check Login
$email = $_POST['email'];
$password = $_POST['password'];
// check for user
$user = $db->getUserByEmailAndPassword($email, $password);
if ($user != false) {
// user found
// echo json with success = 1
$response["success"] = 1;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
// user not found
// echo json with error = 1
$response["error"] = 1;
$response["error_msg"] = "Incorrect email or password!";
echo json_encode($response);
}
} else if ($tag == 'register') {
// Request type is Register new user
$name = $_POST['name'];
$email = $_POST['email'];
$password = $_POST['password'];
// check if user is already existed
if ($db->isUserExisted($email)) {
// user is already existed - error response
$response["error"] = 2;
$response["error_msg"] = "User already existed";
echo json_encode($response);
} else {
// store user
$user = $db->storeUser($name, $email, $password);
if ($user) {
// user stored successfully
$response["success"] = 1;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
// user failed to store
$response["error"] = 1;
$response["error_msg"] = "Error occured in Registartion";
echo json_encode($response);
}
}
} else {
echo "Invalid Request";
}
} else {
echo "Access Denied";
}
?>
DB_Connect.php
<?php
class DB_Connect {
// constructor
function __construct() {
}
// destructor
function __destruct() {
// $this->close();
}
// Connecting to database
public function connect() {
require_once 'include/config.php';
// connecting to mysql
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
// selecting database
mysql_select_db(DB_DATABASE);
// return database handler
return $con;
}
// Closing database connection
public function close() {
mysql_close();
}
}
?>
DB_Functions.php
<?php
class DB_Functions {
private $db;
//put your code here
// constructor
function __construct() {
require_once 'DB_Connect.php';
// connecting to database
$this->db = new DB_Connect();
$this->db->connect();
}
// destructor
function __destruct() {
}
/**
* Storing new user
* returns user details
*/
public function storeUser($name, $email, $password) {
$uuid = uniqid('', true);
$hash = $this->hashSSHA($password);
$encrypted_password = $hash["encrypted"]; // encrypted password
$salt = $hash["salt"]; // salt
$result = mysql_query("INSERT INTO users(unique_id, name, email, encrypted_password, salt, created_at) VALUES('$uuid', '$name', '$email', '$encrypted_password', '$salt', NOW())");
// check for successful store
if ($result) {
// get user details
$uid = mysql_insert_id(); // last inserted id
$result = mysql_query("SELECT * FROM users WHERE uid = $uid");
// return user details
return mysql_fetch_array($result);
} else {
return false;
}
}
/**
* Get user by email and password
*/
public function getUserByEmailAndPassword($email, $password) {
$result = mysql_query("SELECT * FROM users WHERE email = '$email'") or die(mysql_error());
// check for result
$no_of_rows = mysql_num_rows($result);
if ($no_of_rows > 0) {
$result = mysql_fetch_array($result);
$salt = $result['salt'];
$encrypted_password = $result['encrypted_password'];
$hash = $this->checkhashSSHA($salt, $password);
// check for password equality
if ($encrypted_password == $hash) {
// user authentication details are correct
return $result;
}
} else {
// user not found
return false;
}
}
/**
* Check user is existed or not
*/
public function isUserExisted($email) {
$result = mysql_query("SELECT email from users WHERE email = '$email'");
$no_of_rows = mysql_num_rows($result);
if ($no_of_rows > 0) {
// user existed
return true;
} else {
// user not existed
return false;
}
}
/**
* Encrypting password
* @param password
* returns salt and encrypted password
*/
public function hashSSHA($password) {
$salt = sha1(rand());
$salt = substr($salt, 0, 10);
$encrypted = base64_encode(sha1($password . $salt, true) . $salt);
$hash = array("salt" => $salt, "encrypted" => $encrypted);
return $hash;
}
/**
* Decrypting password
* @param salt, password
* returns hash string
*/
public function checkhashSSHA($salt, $password) {
$hash = base64_encode(sha1($password . $salt, true) . $salt);
return $hash;
}
}
?>
对不起代码墙，但我不确定什么是有用的，什么不是。如何使用主要活动的oncreate将纬度和经度插入数据库？我可以很好地获得纬度和经度，并在登录时连接到数据库。
答案 0 :(得分：0)
我对你的课程进行了一些重要的修改，以使他们更好地工作。
<强> PHP
DB_Functions.php
我添加了一个新功能，以便我们可以在用户表上进行更新。
/**
* Update user by email and password
*/
public function updateUserByEmailAndPassword($email, $password, $lon, $lat) {
$user = $this -> getUserByEmailAndPassword($email, $password);
if ($user != false) {
$unique_id=$user["unique_id"];
mysql_query("UPDATE users SET loclong='$lon', loclat='$lat', updated_at=now() WHERE unique_id='$unique_id'") or die(mysql_error());
$affected = mysql_affected_rows();
if($affected > 0){
return true;
} else {
return false;
}
}else{
return false;
}
}
<强> Dbase.php 我添加了一个新的tag =“update_location”来接收和管理用户更新的POST请求
else if ($tag == 'update_location') { // check for tag type
// Request type is check Login
$email = $_POST['email'];
$password = $_POST['password'];
// Request lon/lat
$lon = $_POST['lon'];
$lat = $_POST['lat'];
// check for user
$state = $db->UpdateUserByEmailAndPassword($email, $password, $lon, $lat);
if ($state != false) {
$response["success"] = 1;
$response["success_msg"] = "Geo location data update successfull!";
echo json_encode($response);
} else {
// user not found
// echo json with error = 1
$response["error"] = 1;
$response["error_msg"] = "Geo location data update failed!";
echo json_encode($response);
}
}
此外，我对您的database.table（用户）进行了一些更改，因为经度/纬度不是Integer 替换
`loclat` int(11) NOT NULL,
`loclong` int(11) NOT NULL
与
`loclat` varchar(11) NOT NULL,
`loclong` varchar(11) NOT NULL,
大多数修改都是在DashboardActivity中进行的。看看里面，如果你有问题，请随时问我。
public class DashboardActivity extends Activity {
public static String USER_FUNCTIONS = "user functions";
private static String KEY_SUCCESS = "success";
/**
* Millisecondes
*/
private static int POLLING_WAITING_TIME = 5 * 1000;
UserFunctions mUserFunctions;
Button btnLogout;
Button btnloc;
GPSTracker gps;
private Handler mHandler;
private Runnable mRunnable;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dashboard);
Bundle extras = getIntent().getExtras();
if (extras != null) {
if (extras.containsKey(USER_FUNCTIONS)) {
mUserFunctions = (UserFunctions) extras.getSerializable(USER_FUNCTIONS);
}
}
toggleActivities();
}
@Override
protected void onResume() {
super.onResume();
toggleActivities();
}
/**
*
*/
private void toggleActivities() {
// Check login status in database
if (mUserFunctions != null && mUserFunctions.isUserLoggedIn(getApplicationContext())) {
// user already logged in show databoard
btnLogout = (Button) findViewById(R.id.btnLogout);
btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
mUserFunctions.logoutUser(getApplicationContext());
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
});
} else {
// user is not logged in show login screen
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
// startTimer
timer();
}
/**
* managed HandlerManger and controls the timer
*/
private void timer() {
mRunnable = new HandlerManger();
mHandler = new Handler();
mHandler.postDelayed(mRunnable, POLLING_WAITING_TIME);
}
/**
*
*/
private void processGPSTracker() {
if (mUserFunctions == null || !mUserFunctions.isUserLoggedIn(getApplicationContext()))
return;
gps = new GPSTracker(DashboardActivity.this);
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
JSONObject json = mUserFunctions.updateUserGeoLocation(Double.valueOf(longitude)
.toString(), Double.valueOf(latitude).toString());
// check for login response
try {
if (json.getString(KEY_SUCCESS) != null && json.getString(KEY_SUCCESS).equals("1")) {
Log.i("DashboardActivity", "Update on geolocation success");
} else {
Log.e("DashboardActivity", "Update on geolocation Failed");
}
} catch (JSONException e) {
e.printStackTrace();
}
// \n is for new line
Toast.makeText(getApplicationContext(),
"Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG)
.show();
} else {
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
}
/**
* Timer business logic runner
*
* @author Festus Tamakloe
*/
private class HandlerManger implements Runnable {
public void run() {
processGPSTracker();
}
}
}
在userFunctions中，我还添加了一个与http服务器
通信的新方法 public JSONObject updateUserGeoLocation(String lon, String lat) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tag", LOCATION_UPDATE_TAG));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("password", password));
params.add(new BasicNameValuePair("lon", lon));
params.add(new BasicNameValuePair("lat", lat));
JSONObject json = jsonParser.getJSONFromUrl(LOCATION_UPDATE_URL, params);
return json;
}
我希望这可以帮到你