I'm still new to android programming and currently learning how to connect to DB.
I'm following a online tutorial but I'm still facing problems.
The tutorial is about create a registration form and sending it to the database through volley.
I'm using .hostinger.ae as host and Android studio.
Everything seems fine until I click the register button it give me an error of (Couldn't register )
I couldn't locate the error and debugging shows no errors. so please I would appreciate any help to locate the problem.
I have two php files uploaded to the online host on the public folder
dbconnect php The file used to connect to data base
<?php
define('HOST','mysql.hostinger.ae');
define('USER','--');
define('PASS','--');
define('DB','u853541076_tuber');
$con = mysqli_connect(HOST,USER,PASS,DB) or die('Unable to Connect');
and the volleyRegister php
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
$username = $_POST['username'];
$email = $_POST['email'];
$password = $_POST['password'];
require_once('dbConnect.php');
$sql = "INSERT INTO volley (username,password,email) VALUES('$username','$email','$password')";
if(mysqli_query($con,$sql)){
echo "Successfully Registered";
}else{
echo "Could not register";
}
}else{
echo 'error';
}
My mainactivty .java http://tuber.16mb.com is my domain
package myapp.com.tuberapp;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONException;
import java.util.HashMap;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
///The hosting link
public static final String REGISTER_URL = "http://tuber.16mb.com/volleyRegister.php";
public static final String KEY_USERNAME = "username";
public static final String KEY_PASSWORD = "password";
public static final String KEY_EMAIL = "email";
private EditText editTextUsername;
private EditText editTextEmail;
private EditText editTextPassword;
private Button buttonRegister;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextUsername = (EditText) findViewById(R.id.editTextUsername);
editTextPassword = (EditText) findViewById(R.id.editTextPassword);
editTextEmail= (EditText) findViewById(R.id.editTextEmail);
buttonRegister = (Button) findViewById(R.id.buttonRegister);
buttonRegister.setOnClickListener(this);
}
private void registerUser(){
final String username = editTextUsername.getText().toString().trim();
final String password = editTextPassword.getText().toString().trim();
final String email = editTextEmail.getText().toString().trim();
StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Toast.makeText(MainActivity.this, response, Toast.LENGTH_LONG).show();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this,error.toString(),Toast.LENGTH_LONG).show();
}
}){
#Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put(KEY_USERNAME,username);
params.put(KEY_PASSWORD,password);
params.put(KEY_EMAIL, email);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
#Override
public void onClick(View v) {
if(v == buttonRegister){
registerUser();
}
}
}
manifest.java
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="myapp.com.tuberapp">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Hit the URL on the browser directly.
http://tuber.16mb.com/volleyRegister.php
This will give error. Possibilities of error may be:
1. Your SQL insert statement is wrongly formed. Some table name or any other issues.
2. Your db configuration file may be some
your query is not match "INSERT INTO volley (username,password,email) VALUES('$username','$email','$password')" . should its query is "`INSERT INTO volley (username,password,email) VALUES('$username','$password','$email')"
check again your server side code, check if the query already successful to insert data into your table.
Related
I am working on an android app that requires user authentication. I am using localhost phpadmin for server and database connexion. The app so far has 1 login activity that imports a php url to connect to localhost. If everything works fine the app is supposed to show an alertDialog saying that login was successful. But whenever i try running the app, when i click login it shows an empty alertDialog and the AndroidStudio debugger shows this error : java.net.ConnectException:Failed to connect to /10.0.2.2:443
This is the code for MainActivity :
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
EditText UsernameEt , PasswordEt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
UsernameEt= (EditText)findViewById(R.id.editTextTextPersonName);
PasswordEt= (EditText)findViewById(R.id.editTextTextPassword);
}
public void OnLogin(View view) {
String username= UsernameEt.getText().toString();
String password= PasswordEt.getText().toString();
BackroundWorker backroundWorker=new BackroundWorker(this);
String type= "login";
backroundWorker.execute(type,username,password);
}
}
and this is the code for BackroundWorker class:
package com.android.example.meetmev0;
import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import javax.net.ssl.HttpsURLConnection;
public class BackroundWorker extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;
public BackroundWorker ( Context ctx) {
context=ctx;
}
#Override
protected String doInBackground(String... voids) {
String type = voids[0];
String login_url= "https://10.0.2.2/MeetLogin.php";
if(type.equals("login"))
{
String test="so far so good";
try {
String username = voids[1];
String password = voids[2];
URL url= new URL(login_url);
HttpsURLConnection httpsURLConnection = (HttpsURLConnection)url.openConnection();
httpsURLConnection.setRequestMethod("POST");
httpsURLConnection.setDoOutput(true);
httpsURLConnection.setDoInput(true);
OutputStream outputStream= httpsURLConnection.getOutputStream();
test= " still good";
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data= URLEncoder.encode("username ", "UTF-8")+"="+URLEncoder.encode(username , "UTF-8")+"&"
+URLEncoder.encode("password", "UTF-8")+"="+URLEncoder.encode(password , "UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpsURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"ISO-8859-1"));
String result="";
String line="";
while((line = bufferedReader.readLine())!=null){
result+=line;
}
bufferedReader.close();
inputStream.close();
httpsURLConnection.disconnect();
Log.v("Activity test: ", result);
return result;
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPreExecute() {
alertDialog= new AlertDialog.Builder(context).create();
alertDialog.setTitle("Login Status");
}
#Override
protected void onPostExecute(String result) {
alertDialog.setMessage(result);
alertDialog.show();
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
using breakpoints i found out that this line OutputStream outputStream= httpsURLConnection.getOutputStream(); is what's throwing the exception.
This is my AndroidManifest file :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.example.meetmev0">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme"
android:usesCleartextTraffic="true">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I tried adding ports 80,8080 and 8888 but it didn't work. Swapping 10.0.2.2to localhostor to my local ip didn't work either.
I changed https to http:
String login_url= "https://10.0.2.2/MeetLogin.php" to String login_url= "http://10.0.2.2/MeetLogin.php"
and
HttpsURLConnection httpsURLConnection = (HttpsURLConnection)url.openConnection(); to HttpURLConnection httpsURLConnection = (HttpURLConnection)url.openConnection();
Now it works perfectly.
I have written a code to list nearby Bluetooth Devices but my code is unable to detect any.
According to my code, the action just starts and end and not print any device in logs when I do String action = intent.getAction(); Log.i("Action",action);
in onRecieve() under BroadCastReciever.
Here is my MainActivity.java :
package com.example.findbluetoothdemo;
import androidx.appcompat.app.AppCompatActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
TextView statusTextView;
ListView listView;
Button searchButton;
ArrayList<String> bluetoothDevices = new ArrayList<>();
ArrayList<String> addresses = new ArrayList<>();
ArrayAdapter arrayAdapter;
BluetoothAdapter bluetoothAdapter;
private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.i("Action",action);
if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
statusTextView.setText("Finished");
searchButton.setEnabled(true);
} else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
String name = device.getName();
String address = device.getAddress();
String rssi = Integer.toString(intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE));
Log.i("Device Found","Nmae :"+name+" Address :"+address+" RSSI :"+rssi);
if (!addresses.contains(address)) {
addresses.add(address);
String deviceString = "";
if (name==null || name.equals("")) {
deviceString = address+" - RSSI "+rssi+"dBm";
} else {
deviceString = name+" - RSSI "+rssi+"dBm";
}
bluetoothDevices.add(deviceString);
arrayAdapter.notifyDataSetChanged();
}
}
}
};
public void searchFunction(View view) {
bluetoothDevices.add("ADDING NEW DEVICES...");
statusTextView.setText("Searching...");
searchButton.setEnabled(false);
arrayAdapter.notifyDataSetChanged();
bluetoothDevices.clear();
addresses.clear();
bluetoothAdapter.startDiscovery();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
statusTextView = findViewById(R.id.statusTextView);
listView = findViewById(R.id.listView);
searchButton = findViewById(R.id.button);
arrayAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,bluetoothDevices);
listView.setAdapter(arrayAdapter);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(broadcastReceiver ,intentFilter);
}
}
And here is AndroidManifest.xml :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.findbluetoothdemo">
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"></uses-permission>
<uses-permission android:name="android.permission.BLUETOOTH"></uses-permission>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
You need to ask for permission if you haven't done already.
int premissionCehck = context.checkSelfPermission("Manifest.premission.ACCES_FINE_LOCATION");
premissionCehck += context.checkSelfPermission("Manifest.premission.ACCES_FINE_LOCATION");
if (premissionCehck != 0) {
ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 1001);
}
Take Care, If you already denied permission once, the permission request doesn't appear again, so you need to give it free in your android settings.
I understand this questions has been asked many times, for each question that has already been asked, the implementation is different from mine. The method I used create and call the intentService for a geocoder, was used from the android dev tutorial site.
https://developer.android.com/training/location/display-address.html.
I have gone over the the tutorial 3 times over to make sure I wasn't missing anything, but it is clear that I am.
Here is my manifest file, I have added the location and internet permissions.
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".selectRouteAndTransportMethod">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<service
android:name=".FetchAddressIntentService"
android:exported="false"/>
</activity>
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name="user.com.commuterapp.MapsActivity"
android:label="#string/title_activity_maps"></activity><!-- ATTENTION: This was auto-generated to add Google Play services to your project for
App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>
Here is my main activity: All I am doing here is using a buttonClick to create the intent and to start the intent.
package user.com.commuterapp;
import android.app.PendingIntent;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;
import user.com.commuterapp.R;
import static java.lang.Boolean.TRUE;
public class selectRouteAndTransportMethod extends AppCompatActivity {
Intent mIntent;
PendingIntent mPendingIntent;
myLocation mCurrentLocation;
private AddressResultReceiver mResultReceiver;
public static final String TAG = selectRouteAndTransportMethod.class.getSimpleName();
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select_route_and_transport_method);
mIntent = new Intent(this, selectRouteAndTransportMethod.class);
mPendingIntent = PendingIntent.getActivity(this, 0, mIntent, 0);
mCurrentLocation = new myLocation(this, this, mPendingIntent);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
}
#Override
protected void onStart() {
super.onStart();
Log.d(TAG, "On Start");
mCurrentLocation.connect();
boolean connecting = mCurrentLocation.mGoogleApiClient.isConnecting();
boolean registered = mCurrentLocation.mGoogleApiClient.isConnectionCallbacksRegistered(mCurrentLocation);
//ConnectionResult connectionResult = mCurrentLocation.mGoogleApiClient.getConnectionResult(LocationServices.API);
if (connecting == TRUE) {
Log.d(TAG, "Connecting");
}
if (registered == TRUE) {
Log.d(TAG, "registered");
}
}
#Override
protected void onResume() {
super.onResume();
mCurrentLocation.connect();
}
#Override
protected void onPause() {
super.onPause();
// mCurrentLocation.disconnect();
}
protected void buttonOriginClick(View view)
{
Log.d(TAG,"retrieving address");
retrieveAddress();
}
protected void retrieveAddress() {
Intent geoCoderIntent = new Intent(this, FetchAddressIntentService.class);
geoCoderIntent.putExtra(FetchAddressIntentService.Constants.RECIEVER, mResultReceiver);
geoCoderIntent.putExtra(FetchAddressIntentService.Constants.LOCATION_DATA_EXTRA, mCurrentLocation.mCurrentLocation);
startService(geoCoderIntent);
}
}
And lastly here is the intentService class. This was straight out of the android dev tutorial site, nothing original here.
package user.com.commuterapp;
import android.app.IntentService;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.os.ResultReceiver;
import android.text.TextUtils;
import android.util.Log;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import static android.content.ContentValues.TAG;
/**
* Created by User on 1/21/2017.
*/
public class FetchAddressIntentService extends IntentService {
public final class Constants{
public static final int SUCCESS_RESULT = 0;
public static final int FAILURE_RESULT = 1;
public static final String PACKAGE_NAME =
"user.com.commuterapp";
public static final String RECIEVER = PACKAGE_NAME +
".RECIEVER";
public static final String RESULT_DATA_KEY = PACKAGE_NAME + ".RESULT_DATA_KEY";
public static final String LOCATION_DATA_EXTRA = PACKAGE_NAME +
".LOCATION_DATA_EXTRA";
}
protected ResultReceiver mReceiver;
public FetchAddressIntentService()
{
super("FetchAddressIntentService");
}
private void deliverResultToReceiver(int resultCode, String message){
Bundle bundle = new Bundle();
bundle.putString(Constants.RESULT_DATA_KEY, message);
mReceiver.send(resultCode,bundle);
}
#Override
protected void onHandleIntent (Intent intent) {
Log.d(TAG, "GeoCoder Service Started");
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
String errorMessage = "";
Location location = intent.getParcelableExtra(Constants.LOCATION_DATA_EXTRA);
List<Address> addresses = null;
try {
addresses = geocoder.getFromLocation(
location.getLongitude(),
location.getLatitude(),
1);
}catch (IOException ioException) {
//catch network or other I/O Problems
errorMessage = getString(R.string.service_not_available);
Log.e(TAG, errorMessage);
} catch (IllegalArgumentException illegalArgumentException){
//catch invalid latitude or longitude values
errorMessage = getString(R.string.invalid_lat_long_used);
Log.e(TAG, errorMessage + "." + "Latitude =" + location.getLatitude()
+ ", Longitude = " + location.getLongitude(),
illegalArgumentException);
}
//handle cases where no addresses was foudn
if (addresses == null || addresses.size() == 0)
{
if(errorMessage.isEmpty()){
errorMessage = getString(R.string.no_address_found);
Log.e(TAG,errorMessage);
}
deliverResultToReceiver(Constants.FAILURE_RESULT, errorMessage);
}else
{
Address address = addresses.get(0);
ArrayList<String> addressFragments = new ArrayList<String>();
//Fetch the address lines using getAddressLine
//join them and send them to the thread
for(int i = 0; i < address.getMaxAddressLineIndex(); i++){
addressFragments.add(address.getAddressLine(i));
}
Log.i(TAG, getString(R.string.address_found));
deliverResultToReceiver(Constants.SUCCESS_RESULT,
TextUtils.join(System.getProperty("line.seperator"), addressFragments));
}
}
}
EDIT: I have tried rewriting the geocoder following the instructions from the android dev site again, but no success.
EDIT2: I noticed in the manifest I declared the service, within the application declaration, instead of outside, I made the change but to no avail, any insights will be appreciated
I am getting this exception when trying to start a new activity through a method in my Main
java.lang.NullPointerException: Attempt to invoke virtual method
'android.content.Context android.content.Context.getApplicationContext()
' on a null object reference
The method i am using to start the new activity is not called in the main activity. I think this is what is causing the issue, since i tried to call the method in the OnCreate method of the main activity, and it worked.
However i cannot figure out a way to fix this, a friend suggested that i used singleton, but that didn't work - or maybe my understanding of how to use it is just too limited.
This is my main class:
package gruppe16.sdupay;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import java.util.ArrayList;
/**
* An example full-screen activity that shows and hides the system UI (i.e.
* status bar and navigation/system bar) with user interaction.
*/
public class Main extends Activity {
static EditText et1, et2, et3, et4;
private String password = "1234";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et1 = (EditText) findViewById(R.id.editText1);
et2 = (EditText) findViewById(R.id.editText2);
et3 = (EditText) findViewById(R.id.editText3);
et4 = (EditText) findViewById(R.id.editText4);
et1.addTextChangedListener(new CustomTextWatcher(et1));
et2.addTextChangedListener(new CustomTextWatcher(et2));
et3.addTextChangedListener(new CustomTextWatcher(et3));
et4.addTextChangedListener(new CustomTextWatcher(et4));
}
public void login (String passInput){
if(passInput.equals(password)){
Log.d("asd", "PASS IS CORRECT");
Intent appIntent = new Intent(getApplicationContext(), AppActivity.class);
startActivity(appIntent);
} else {
Log.d("asd2", "PASS IS NOT CORRECT");
}
}
}
This is my CustomTextWatcher class
package gruppe16.sdupay;
import android.content.Intent;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.EditText;
/**
* Created by jonaspedersen on 15/12/15.
*/
public class CustomTextWatcher implements TextWatcher {
static String et1String, et2String, et3String, et4String;
private EditText mEditText;
private Main MainObject = new Main();
private String passString;
public CustomTextWatcher(EditText e) {
mEditText = e;
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
if (mEditText == Main.et1){
et1String = Main.et1.getText().toString();
Main.et2.requestFocus();
} else if (mEditText == Main.et2){
et2String = Main.et2.getText().toString();
Main.et3.requestFocus();
} else if (mEditText == Main.et3){
et3String = Main.et3.getText().toString();
Main.et4.requestFocus();
} else if (mEditText == Main.et4){
et4String = Main.et4.getText().toString();
passString = et1String + et2String + et3String + et4String;
MainObject.login(passString);
}
}
}
AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="gruppe16.sdupay">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#android:style/Theme.Light.NoTitleBar">
<activity
android:name=".Main"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="#string/app_name"
android:theme="#style/SDUTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".AppActivity"
android:label="#string/title_activity_app"></activity>
</application>
</manifest>
use
Intent appIntent = new Intent(Main.this, AppActivity.class);
also change CustomTextWatcher constructor
private Main MainObject;
private String passString;
public CustomTextWatcher(EditText e,Main MainObject) {
mEditText = e;
this.MainObject = MainObject;
}
and set TextWatcher like
et1.addTextChangedListener(new CustomTextWatcher(et1),Main.this);
I have to get some data from a MySQL database on server. I have the following code.but the app crashes when I run it. I also get the Permission denied (missing INTERNET permission?) in my Logcat even though I specified the internet permission in my Android Manifest.
Any idea what might be wrong here?
Java file
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
TextView text;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
connect();
}
private void connect() {
String data;
List<String> r = new ArrayList<String>();
ArrayAdapter<String>adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,r);
ListView list=(ListView)findViewById(R.id.listView1);
try {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("http://xxxxx/data.php");
HttpResponse response = client.execute(request);
HttpEntity entity=response.getEntity();
data=EntityUtils.toString(entity);
Log.e("STRING", data);
try {
JSONArray json=new JSONArray(data);
for(int i=0;i<json.length(); i++)
{
JSONObject obj=json.getJSONObject(i);
String name=obj.getString("name");
String desc=obj.getString("description");
// String lat=obj.getString("lat");
Log.e("STRING", name);
r.add(name);
r.add(desc);
// r.add(lat);
list.setAdapter(adapter);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (ClientProtocolException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
} catch (IOException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.diana.menu" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-permission android:name="android.permission.INTERNET"/>
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
data.php
<?php
$conn=mysql_connect('localhost', 'xxxx', 'xxxxx','u199776286_pois');
if(!$conn )
{
die('Could not connect: ' . mysql_error());
}
$sql = 'SELECT name, description FROM pois';
mysql_select_db('u199776286_pois');
$retval = mysql_query( $sql, $conn );
if(! $retval )
{
die('Could not get data: ' . mysql_error());
}
while($row = mysql_fetch_array($retval, MYSQL_ASSOC))
{
echo "NAME : {$row['name']} <br> ".
"DESCRIPTION : {$row['description']} <br> ".
"--------------------------------<br>";
}
echo "Fetched data successfully\n";
mysql_close($conn);
?>
my logcat
This happens because you're connecting to your MySQL server from the main UI thread. create a secondary thread (or async task) to connect and to get the results.
Use Async Task to get the data from your database..
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Writing the above code is not at all a better way to get rid from NetworkOnMainThreadException . You have to use any background thread for doing network operation in android above api 11 such as Asynch Task , Intent Service etc.
How to fix android.os.NetworkOnMainThreadException?
You can also use Executors for network task's
Executors.newSingleThreadExecutor().submit(new Runnable() {
#Override
public void run() {
//You can performed your task here.
}
});
Add Internet Permission in your AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
Use Asynck Task like
List<String> r = new ArrayList<String>();
Need to declare out of connect();
with Oncreate
new LongOperation().execute("");
now create
private class LongOperation extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
connect();
return "Executed";
}
#Override
protected void onPostExecute(String result) {
ArrayAdapter<String>adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,r);
ListView list=(ListView)findViewById(R.id.listView1);
list.setAdapter(adapter);
}
#Override
protected void onPreExecute() {}
#Override
protected void onProgressUpdate(Void... values) {}
}
// need to remove Ui control from connect(); and that require value
bind it on onPostExecute
use Async. For more help check this