我正在开发一个Android应用程序，用户将用户名和密码保存到数据库中，并将值保存在数据库中。当用户下次可以登录而不是注册时，所以在那时，用户输入的用户名和密码将使用保存在表中的数据进行检查，如果用户名与密码匹配，则用户将被定向到下一个页面，否则将显示错误消息。在我的情况下，注册过程正常工作并在登录过程中。当执行该过程不起作用。我正在添加我的活动和用于连接数据库与app和logcat的php文件。请检查一下，如果有任何错误请帮我解决。感谢。
活动
public class SignInActivity extends Activity
{
/*LoginDataBaseAdapter loginDataBaseAdapter;*/
Button btnsignin;
String name,password, psw;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// single product url
private static final String url_get_name = "http://iascpl.com/app/get_name_details.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCT = "product";
private static final String TAG_PASSWORD = "password";
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.signin_xm);
/*loginDataBaseAdapter=new LoginDataBaseAdapter(this);
loginDataBaseAdapter=loginDataBaseAdapter.open();*/
btnsignin = (Button) findViewById ( R.id.button401);
btnsignin.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new GetNameDetails().execute();
}
});
}
class GetNameDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SignInActivity.this);
pDialog.setMessage("Loading the result... Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... args)
{
final EditText et1 = (EditText) findViewById (R.id.editText401);
final EditText et2 = (EditText) findViewById (R.id.editText402);
name =et1.getText().toString();
password = et2.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", name));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_get_name, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_PRODUCT); // JSON Array
// get first product object from JSON Array
final JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
runOnUiThread(new Runnable() {
@Override
public void run()
{
// TODO Auto-generated method stub
try {
psw = product.getString(TAG_PASSWORD);
if (password == psw);
{
Toast.makeText(SignInActivity.this, "Login Successfull", Toast.LENGTH_LONG).show();
Intent i = new Intent(SignInActivity.this,HomePageActivity.class);
startActivity(i);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url)
{
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
}
PHP
<?php
/*
* Following code will get single product details
* A product is identified by product id (pid)
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// check for post data
if (isset($_GET["name"])) {
$name = $_GET['name'];
// get a product from products table
$result = mysql_query("SELECT *FROM numerol WHERE name = $name");
if (!empty($result)) {
// check for empty result
if (mysql_num_rows($result) > 0) {
$result = mysql_fetch_array($result);
$product = array();
$product["name"] = $result["name"];
$product["passwordr"] = $result["password"];
// $product["price"] = $result["price"];
//$product["description"] = $result["description"];
$product["created_at"] = $result["created_at"];
$product["updated_at"] = $result["updated_at"];
// success
$response["success"] = 1;
// user node
$response["product"] = array();
array_push($response["product"], $product);
// echoing JSON response
echo json_encode($response);
} else {
// no product found
$response["success"] = 0;
$response["message"] = "No product found";
// echo no users JSON
echo json_encode($response);
}
} else {
// no product found
$response["success"] = 0;
$response["message"] = "No product found";
// echo no users JSON
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
logcat的
11-09 09:18:01.930: E/Trace(5068): error opening trace file: No such file or directory (2)
11-09 09:18:04.410: D/gralloc_goldfish(5068): Emulator without GPU emulation detected.
11-09 09:18:09.303: D/dalvikvm(5068): GC_CONCURRENT freed 83K, 7% free 2712K/2916K, paused 74ms+98ms, total 704ms
11-09 09:18:11.200: I/Choreographer(5068): Skipped 88 frames! The application may be doing too much work on its main thread.
11-09 09:18:20.180: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:23.910: D/dalvikvm(5068): GC_FOR_ALLOC freed 54K, 6% free 2872K/3048K, paused 61ms, total 82ms
11-09 09:18:23.931: I/dalvikvm-heap(5068): Grow heap (frag case) to 3.526MB for 635812-byte allocation
11-09 09:18:24.101: D/dalvikvm(5068): GC_FOR_ALLOC freed 2K, 5% free 3490K/3672K, paused 165ms, total 165ms
11-09 09:18:24.341: D/dalvikvm(5068): GC_CONCURRENT freed 2K, 5% free 3501K/3672K, paused 32ms+95ms, total 242ms
11-09 09:18:24.841: I/Choreographer(5068): Skipped 72 frames! The application may be doing too much work on its main thread.
11-09 09:18:25.690: I/Choreographer(5068): Skipped 83 frames! The application may be doing too much work on its main thread.
11-09 09:18:26.030: I/Choreographer(5068): Skipped 60 frames! The application may be doing too much work on its main thread.
11-09 09:18:26.860: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:28.152: I/Choreographer(5068): Skipped 71 frames! The application may be doing too much work on its main thread.
11-09 09:18:29.102: I/Choreographer(5068): Skipped 32 frames! The application may be doing too much work on its main thread.
11-09 09:18:30.110: I/Choreographer(5068): Skipped 44 frames! The application may be doing too much work on its main thread.
11-09 09:18:30.522: I/Choreographer(5068): Skipped 34 frames! The application may be doing too much work on its main thread.
11-09 09:18:31.310: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:33.371: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:33.580: I/Choreographer(5068): Skipped 36 frames! The application may be doing too much work on its main thread.
11-09 09:18:37.130: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:18:37.562: I/Choreographer(5068): Skipped 33 frames! The application may be doing too much work on its main thread.
11-09 09:18:39.361: I/Choreographer(5068): Skipped 45 frames! The application may be doing too much work on its main thread.
11-09 09:18:39.500: I/Choreographer(5068): Skipped 37 frames! The application may be doing too much work on its main thread.
11-09 09:18:41.312: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:44.911: I/Choreographer(5068): Skipped 36 frames! The application may be doing too much work on its main thread.
11-09 09:18:45.660: I/Choreographer(5068): Skipped 32 frames! The application may be doing too much work on its main thread.
11-09 09:18:47.970: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:18:50.081: I/Choreographer(5068): Skipped 39 frames! The application may be doing too much work on its main thread.
11-09 09:18:51.350: I/Choreographer(5068): Skipped 38 frames! The application may be doing too much work on its main thread.
11-09 09:18:51.720: D/Single Product Details(5068): {"message":"No product found","success":0}
11-09 09:19:12.970: I/Choreographer(5068): Skipped 85 frames! The application may be doing too much work on its main thread.
11-09 09:19:13.170: I/Choreographer(5068): Skipped 43 frames! The application may be doing too much work on its main thread.
11-09 09:19:18.532: I/Choreographer(5068): Skipped 42 frames! The application may be doing too much work on its main thread.
11-09 09:19:18.740: I/Choreographer(5068): Skipped 47 frames! The application may be doing too much work on its main thread.
11-09 09:19:24.440: I/Choreographer(5068): Skipped 76 frames! The application may be doing too much work on its main thread.
11-09 09:19:24.630: I/Choreographer(5068): Skipped 32 frames! The application may be doing too much work on its main thread.
11-09 09:19:25.001: I/Choreographer(5068): Skipped 51 frames! The application may be doing too much work on its main thread.
11-09 09:19:25.610: I/Choreographer(5068): Skipped 146 frames! The application may be doing too much work on its main thread.
11-09 09:19:26.520: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:19:27.412: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:19:28.701: D/Single Product Details(5068): {"message":"No product found","success":0}
11-09 09:19:51.432: I/Choreographer(5068): Skipped 54 frames! The application may be doing too much work on its main thread.
11-09 09:19:53.631: D/dalvikvm(5068): GC_CONCURRENT freed 166K, 8% free 3740K/4028K, paused 74ms+101ms, total 332ms
11-09 09:19:54.360: I/Choreographer(5068): Skipped 112 frames! The application may be doing too much work on its main thread.
11-09 09:19:54.560: I/Choreographer(5068): Skipped 33 frames! The application may be doing too much work on its main thread.
11-09 09:19:55.591: I/Choreographer(5068): Skipped 195 frames! The application may be doing too much work on its main thread.
11-09 09:19:55.921: I/Choreographer(5068): Skipped 80 frames! The application may be doing too much work on its main thread.
11-09 09:19:56.150: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:19:56.562: I/Choreographer(5068): Skipped 46 frames! The application may be doing too much work on its main thread.
11-09 09:19:56.831: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:19:56.955: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:19:57.471: I/Choreographer(5068): Skipped 32 frames! The application may be doing too much work on its main thread.
11-09 09:19:57.662: I/Choreographer(5068): Skipped 36 frames! The application may be doing too much work on its main thread.
11-09 09:19:58.100: I/Choreographer(5068): Skipped 41 frames! The application may be doing too much work on its main thread.
11-09 09:19:58.350: I/Choreographer(5068): Skipped 36 frames! The application may be doing too much work on its main thread.
11-09 09:19:59.010: I/Choreographer(5068): Skipped 30 frames! The application may be doing too much work on its main thread.
11-09 09:19:59.661: D/Single Product Details(5068): {"message":"No product found","success":0}
11-09 09:20:46.300: I/Choreographer(5068): Skipped 35 frames! The application may be doing too much work on its main thread.
11-09 09:23:11.740: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:25:55.341: I/Choreographer(5068): Skipped 32 frames! The application may be doing too much work on its main thread.
11-09 09:26:51.270: I/Choreographer(5068): Skipped 38 frames! The application may be doing too much work on its main thread.
11-09 09:27:01.220: I/Choreographer(5068): Skipped 58 frames! The application may be doing too much work on its main thread.
11-09 09:28:31.342: I/Choreographer(5068): Skipped 31 frames! The application may be doing too much work on its main thread.
11-09 09:29:01.193: I/Choreographer(5068): Skipped 37 frames! The application may be doing too much work on its main thread.
答案 0 :(得分：0)
doInBackground（）不应该处理活动中的UI，因此在处理doInBackground时显示toast不是一个好主意。使用onPostExecute（）来处理UI EDITED！
class GetNameDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SignInActivity.this);
pDialog.setMessage("Loading the result... Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... args)
{
final EditText et1 = (EditText) findViewById (R.id.editText401);
final EditText et2 = (EditText) findViewById (R.id.editText402);
name =et1.getText().toString();
password = et2.getText().toString();
try { //edited
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("password", password)); //check this please.
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_get_name, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_PRODUCT); // JSON Array
// get first product object from JSON Array
final JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
Intent i = new Intent(SignInActivity.this,HomePageActivity.class);
startActivity(i);
return "true"; // if the login was successful return true string to the onPostExecute(String) and there show the Toast.
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url)
{
// dismiss the dialog once got all details
pDialog.dismiss();
if (file_url == "true")
Toast.makeText(SignInActivity.this, "Login Successfull", Toast.LENGTH_LONG).show();
else
Toast.makeText(SignInActivity.this, "Login unsuccessfull", Toast.LENGTH_LONG).show();
}
}
}