In my Android Studio Project I've a LauncherActivity. There you can type in a Username and a Password. When you press the Register-Button, the LauncherActivity.class file now sends the Serialnumber and the Macaddress od the phone together with the Username and the Password to a php-webservice which inserts the received data into a MySQL-Database.
Now when somebody is already registered, the App should skip the LauncherActivity and open directly the MainActivity.
Here is a picture, how the App should look like!
I've googled for a solution the whole day but i couldn't find a answer due to that issue. It would be great if somebody could help me.
Post Edit: Here's some code:
LauncherActivity.class
package friendlyreminder.praktikum.roupitz21.at;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.provider.*;
import android.provider.Settings;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
public class Launcher extends Activity {
//Progress Dialog
private ProgressDialog pDialog;
final JSONParser jsonParser = new JSONParser();
TextView tvHelp;
EditText etUsername, etPassword, etPassword2;
Button bRegister;
//URL to create a new User
private static final String url_create_user = "http://192.168.1.233/php_mysql/db_new.php";
private static final String url_detail_user = "http://192.168.1.233/php_mysql/db_readall.php";
//JSON Node names
private static final String TAG_SUCCESS = "success";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_launcher);
tvHelp = (TextView) findViewById(R.id.tvHelp);
etUsername = (EditText) findViewById(R.id.etUsername);
etPassword = (EditText) findViewById(R.id.etPassword);
etPassword2 = (EditText) findViewById(R.id.etPassword2);
bRegister = (Button) findViewById(R.id.bRegister);
//Help-Link
tvHelp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent redirect = new Intent(getApplicationContext(),Help.class);
startActivity(redirect);
}
});
//Register-Button
bRegister.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Get Username
String username = etUsername.getText().toString();
//Get Password
String password = etPassword.getText().toString();
//Get Password2
String password2 = etPassword2.getText().toString();
if (username.equals("") || password.equals("") || password2.equals("")) {
String error404 = "You need to type in a Username/ Password/ Default Password";
Intent i = new Intent(getApplicationContext(), ErrorActivity.class);
i.putExtra("error", error404);
startActivity(i);
finish();
} else if (password2.equals("root1234")) {
//creating new users in background thread
new CreateNewUser().execute();
} else {
String error440 = "The Default Password you typed in wasn't correct. Please try again! If you forgot the Default Password, contact the Administrator.";
Intent i = new Intent(getApplicationContext(), ErrorActivity.class);
i.putExtra("error", error440);
startActivity(i);
finish();
}
}
});
}
/**
* Background Async Task to Create new product
* */
class CreateNewUser extends AsyncTask<String, String, String> {
//Before starting background thread Show Progress Dialog
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Launcher.this);
pDialog.setMessage("Creating new User...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
//Creating new User
@Override
protected String doInBackground(String... args) {
/*
// Get IMEI
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String IMEI = tm.getDeviceId();
*/
//Get serialnumber
String serialnumber;
if (!Objects.equals(Build.SERIAL, Build.UNKNOWN)) serialnumber = Build.SERIAL;
else
serialnumber = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
//Get Macaddress
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wInfo = wifiManager.getConnectionInfo();
String macaddress = wInfo.getMacAddress();
//Get Username
String username = etUsername.getText().toString();
//Get Password
String password = etPassword.getText().toString();
//Building Parameters
List<NameValuePair> params = new ArrayList<>();
params.add(new BasicNameValuePair("serialnumber", serialnumber));
params.add(new BasicNameValuePair("macaddress", macaddress));
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
//getting JSON Object
//Note that create user urls accepts Post method
JSONObject json = jsonParser.makeHttpRequest(url_create_user,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
//successful created User
Intent i = new Intent(getApplicationContext(), Main.class);
startActivity(i);
//closing this screen
finish();
} else {
//String Definition
String error444 = "Failed to create User. Maybe the User exists already, please try another one!";
//New Intent
Intent i = new Intent(getApplicationContext(), ErrorActivity.class);
//String to Intent
i.putExtra("error", error444);
//Start ErrorActivity
startActivity(i);
finish();
}
} 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 done
pDialog.dismiss();
}
}
}
LauncherActivity.xml
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/tvWelcome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/welcome"
android:textSize="@dimen/abc_text_size_display_1_material"
android:layout_gravity="center_horizontal"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp" />
<TextView
android:id="@+id/tvWarning"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/warning"
android:layout_below="@+id/tvWelcome"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp" />
<EditText
android:id="@+id/etUsername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/username"
android:layout_marginTop="60dp"
android:layout_below="@+id/tvWarning"
android:layout_alignParentStart="true"
android:inputType="textPersonName" />
<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/password"
android:inputType="textPassword"
android:layout_marginTop="25dp"
android:layout_below="@+id/etUsername"
android:layout_alignParentStart="true" />
<EditText
android:id="@+id/etPassword2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/password2"
android:inputType="textPassword"
android:layout_marginTop="25dp"
android:layout_below="@+id/etPassword"
android:layout_alignParentStart="true" />
<Button
android:id="@+id/bRegister"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/register"
android:layout_below="@+id/etPassword2"
android:layout_toEndOf="@+id/tvWelcome"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp" />
<TextView
android:id="@+id/tvHelp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/help"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="10dp" />
</RelativeLayout>
</ScrollView>
JSONParser.class
package friendlyreminder.praktikum.roupitz21.at;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
/**
* Created by Jakob on 21.07.2015.
*/
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// 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();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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).append("\n");
}
is.close();
json = sb.toString();
} 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;
}
}
