Ich habe diese Codes ausprobiert und möchte eine E-Mail senden, die das Kennwort automatisch generiert und anschließend das zufällige Kennwort in meiner Datenbankspalte aktualisiert, bei der es sich um das verschlüsselte_Kennwort handelt.

Ich weiß wirklich nicht, was mit meinem Code falsch ist. Ich bin neu in dieser Android-Anwendung und auch mit dem PHP. Und ich habe einige andere Fragen gesehen, die mit meinen in Verbindung stehen, aber ich kann sie immer noch nicht lösen. Kann mir bitte jemand helfen? Ich brauche wirklich Hilfe bei meinem Abschlussprojekt.

Eine andere Sache ist, dass nach dem Senden der E-Mail mit dem zufällig generierten Passwort das zufällig generierte Passwort nicht in meiner Datenbankspalte aktualisiert werden kann.

Das ist mein Fehler:

08-29 10:44:10.976: E/JSON Parser(1594): Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
08-29 10:44:10.987: W/dalvikvm(1594): threadid=10: thread exiting with uncaught exception (group=0x40014760)
08-29 10:44:11.006: E/AndroidRuntime(1594): FATAL EXCEPTION: AsyncTask #1
08-29 10:44:11.006: E/AndroidRuntime(1594): java.lang.RuntimeException: An error occured while executing doInBackground()
08-29 10:44:11.006: E/AndroidRuntime(1594):     at android.os.AsyncTask$3.done(AsyncTask.java:266)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.lang.Thread.run(Thread.java:1020)
08-29 10:44:11.006: E/AndroidRuntime(1594): Caused by: java.lang.NullPointerException
08-29 10:44:11.006: E/AndroidRuntime(1594):     at com.pivestigator.login.ForgetPasswordActivity$SendEmail.doInBackground(ForgetPasswordActivity.java:93)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at com.pivestigator.login.ForgetPasswordActivity$SendEmail.doInBackground(ForgetPasswordActivity.java:1)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at android.os.AsyncTask$2.call(AsyncTask.java:252)
08-29 10:44:11.006: E/AndroidRuntime(1594):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)

mein android code:

 public class ForgetPasswordActivity extends Activity {

EditText textforgetEmail;
TextView email_error;

 // Progress Dialog
private ProgressDialog pDialog;

 private static String url_email = "...";

// JSON Node names
        private static final String TAG_SUCCESS = "success";

    JSONParser jsonParser = new JSONParser();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.forget_password);

    Button buttonSubmit = (Button) findViewById(R.id.buttonSubmit);
    textforgetEmail = (EditText) findViewById(R.id.forgetEmail);
    email_error = (TextView) findViewById(R.id.email_error);

    // Link to Login Screen
    buttonSubmit.setOnClickListener(new View.OnClickListener() {

            public void onClick(View view) {
                // creating new product in background thread
                new SendEmail().execute();
            }
    });

}

class SendEmail extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(ForgetPasswordActivity.this);
       // pDialog.setMessage("Sending Email..");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
       // pDialog.show();
    }

    protected String doInBackground(String... args) {
        runOnUiThread(new Runnable() {
            public void run() {
                // SENDING EMAIL METHOD HERE
                String sendemail = textforgetEmail.getText().toString();

                // Building Parameters
                List<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("email", sendemail));

                // getting JSON Object
                // Note that forgotPassword URL accepts POST method
                JSONObject json = jsonParser.makeHttpRequest(
                        url_email, "POST", params);

                // check log cat for response
                 //Log.d("Sending email Response", json.toString());

                // check for success tag
                try {
                    int success = json.getInt(TAG_SUCCESS);

                    if (success == 1) {
                        // successfully email sent
                        Intent intent = new Intent(getApplicationContext(),
                                ForgetPasswordConfirmActivity.class);
                        startActivity(intent);
                        finish();
                    } else {
                        // failed to send email
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });
        return null;
    }

    protected void onPostExecute(String file_url) {
        // dismiss the dialog once done
        pDialog.dismiss();
    }
}

 }

und meine PHP-Datei:

<?php

$response = array();

$random = str_rand();

 function str_rand($length = 8, $seeds = 'alphanum')
{
// Possible seeds
$seedings['alpha'] = 'abcdefghijklmnopqrstuvwqyz';
$seedings['numeric'] = '0123456789';
$seedings['alphanum'] = 'abcdefghijklmnopqrstuvwqyz0123456789';
$seedings['hexidec'] = '0123456789abcdef';

// Choose seed
if (isset($seedings[$seeds]))
{
    $seeds = $seedings[$seeds];
}

// Seed generator
list($usec, $sec) = explode(' ', microtime());
$seed = (float) $sec + ((float) $usec * 100000);
mt_srand($seed);

// Generate
$str = '';
$seeds_count = strlen($seeds);

for ($i = 0; $length > $i; $i++)
{
    $str .= $seeds{mt_rand(0, $seeds_count - 1)};
}

return $str;
}

// check for required fields
if (isset($_POST['email'])) {

$email = $_POST['email'];


$to = $email;
$subject = 'This is an email.';
$body = 'Hi,'."\n\n".'This is your new password: '."$random".'test';
$headers = 'From: [email protected]';

if (mail($to, $subject, $body, $headers)) {
// include db connect class
require_once __DIR__ . '/DB_Connect.php';

// connecting to db
$db = new DB_CONNECT();

// check if row inserted or not
if ($result) {
    // successfully inserted into database
    $response["success"] = 1;
    $response["message"] = "Email successfully sent.";

    // echoing JSON response
    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);
}
 }
?>