Develop Reference

I would like to insert data to phpmyadmin from my android device

At the moment I can add users into the database through postman or emulator but I need to be able insert the data from actual android device .What adjustments do I have to take ? Please have a look at the code below
This is my main activity that I using in my app :
package ie.example.artur.adminapp;
import android.os.AsyncTask;
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.TextView;
import android.widget.Toast;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.util.HashMap;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class MainActivity extends AppCompatActivity {
EditText editTextName,editTextEmail,editTextPassword;
TextView textView;
private static final String DB_URL = "jdbc:mysql://10.3.2.51/socialmedia_website";
private static final String USER = "zzz";
private static final String PASS = "zzz";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
findViewById(R.id.layoutProgress).setVisibility(View.GONE);
textView = (TextView) findViewById(R.id.textView);
editTextName = (EditText) findViewById(R.id.editTextName);
editTextEmail = (EditText) findViewById(R.id.editTextEmail);
editTextPassword = (EditText) findViewById(R.id.editTextPassword);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
public void btnConn(View view) {
findViewById(R.id.layoutProgress).setVisibility(View.VISIBLE);
final ApiClient apiClient = new ApiClient();
String email = editTextEmail.getText().toString();
String name = editTextName.getText().toString();
String password = editTextPassword.getText().toString();
HashMap<String,String> parameters = new HashMap<>();
parameters.put("email",email);
parameters.put("name",name);
parameters.put("password",password);
Call<ApiResponse> call = apiClient.loginUser(parameters);
call.enqueue(new Callback<ApiResponse>() {
#Override
public void onResponse(Call<ApiResponse> call, Response<ApiResponse> response) {
if(response.isSuccessful())
{
ApiResponse apiResponse = response.body();
if(apiResponse.getStatus() == 200 || apiResponse.getStatus() == 201)
{
findViewById(R.id.layoutProgress).setVisibility(View.GONE);
Send objSend = new Send();
objSend.execute("");
//Toast.makeText(MainActivity.this,"Success", Toast.LENGTH_SHORT);
textView.setText("Success.");
}
else
{
//Toast.makeText(MainActivity.this,apiResponse.getErrors(), Toast.LENGTH_SHORT);
textView.setText(apiResponse.getErrors());
}
}
else
{
findViewById(R.id.layoutProgress).setVisibility(View.GONE);
//Toast.makeText(MainActivity.this,"Invalid api response.", Toast.LENGTH_SHORT);
textView.setText("Invalid api response.");
}
}
#Override
public void onFailure(Call<ApiResponse> call, Throwable t) {
findViewById(R.id.layoutProgress).setVisibility(View.GONE);
//Toast.makeText(MainActivity.this,"No host available or please check network connectivity.", Toast.LENGTH_SHORT);
textView.setText("No host available or please check network connectivity.");
}
});
}
private class Send extends AsyncTask<String, String, String>
{
String msg = "";
String name = editTextName.getText().toString();
String email = editTextEmail.getText().toString();
String password = editTextPassword.getText().toString();
#Override
protected void onPreExecute() {
textView.setText("Please Wait Inserting Data");
}
#Override
protected String doInBackground(String... strings) {
try {
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
if (conn == null) {
msg = "Connection goes wrong";
} else {
String query = "Insert INTO users (name,email,password) VALUES('" + name+"','"+email+"','"+password+"')";
Statement stmt = conn.createStatement();
stmt.executeUpdate(query);
msg = "Inserting Successful!!";
}
conn.close();
}
catch(
Exception e
)
{
msg = "Connection goes Wrong";
e.printStackTrace();
}
return msg;
}
#Override
protected void onPostExecute(String msg) {textView.setText(msg);}
}
}
Api client class
package ie.example.artur.adminapp;
import java.util.HashMap;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Call;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
/**
* Created by asifj on 7/25/2017.
*/
public class ApiClient
{
private String BASE_URL = BuildConfig.BASE_URL;
ApiEndPoints apiService;
public ApiClient() {
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
httpClient.addInterceptor(logging); // <-- this is the important line!
Retrofit retrofit = new Retrofit.Builder().baseUrl(BASE_URL).addConverterFactory(GsonConverterFactory.create()).client(httpClient.build()).build();
apiService = retrofit.create(ApiEndPoints.class);
}
public Call<ApiResponse> loginUser(HashMap<String, String> parameters)
{
return apiService.usercreate(parameters);
}
}
If you need me to share any more class please let me know in the comments

//this is a class you'll call in you main activity
public class PostRequest extends AsyncTask<Void, Void, String> {
private String parameters;
private Context context;
public PostRequest(Context context) {
this.context = context;
Log.d("PostRequest", "Context set : " + context);
}
public void setParameters(String parameters) {
this.parameters = parameters;
Log.d("PostRequest", "Parameters set : " + parameters);
}
#Override
protected String doInBackground(Void... params) {
String response = null;
try {
URL url = new URL("url of your php script");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
OutputStreamWriter request = new OutputStreamWriter(connection.getOutputStream());
request.write(parameters);
request.flush();
request.close();
String line = "";
InputStreamReader isr = new InputStreamReader(connection.getInputStream());
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
response = sb.toString();
isr.close();
reader.close();
} catch (IOException e) {
// Error
}
return response;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
}
//in your main activity you'll call it like so
PostRequest postRequest = new PostRequest(getContext());
postRequest.setParameters("param1=" + "param1value" + "&param2=" + "param2value");
postRequest.execute();

Graph Facebook won't retrieve data

I'm trying to retrieve data from Facebook using graph Facebook, like Profile Pic, Gender, Age, Name, ID & Link, I'm getting Facebook Profile Pic only successfully but other won't retrieved. Please help!
MainActivity.java
package com.example.facebookprofile;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.facebookprofile.pictureAsync.onImageDownloaded;
import com.example.facebookprofile.profileAsync.profileImplement;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements profileImplement, onImageDownloaded {
ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void onClick(View view){
EditText enterUsername = (EditText) findViewById(R.id.enterUsername);
String s = "https://graph.facebook.com/" + enterUsername.getEditableText().toString();
pictureAsync picTask = new pictureAsync(this);
profileAsync task = new profileAsync(this);
picTask.execute(s + "/picture?type=large");
picTask.delegate = this;
task.delegate = this;
task.execute(s);
}
public static User parseJSON(String jsonString) throws JSONException{
JSONObject top = new JSONObject(jsonString);
String name = "NA";
if(top.has("name"))
name = top.getString("name");
String username = top.getString("username");
String id = "NA";
if(top.has("id"))
id = top.getString("id");
String gender = "NA";
if(top.has("gender"))
gender = top.getString("gender");
String link = "https://www.facebook.com/"+username;
if(top.has("link"))
link = top.getString("link");
User output = new User(name, username, id, gender, link);
return output;
}
#Override
public void update(User user) {
// TODO Auto-generated method stub
if(user == null){
Toast t = Toast.makeText(this, "Invalid username", Toast.LENGTH_SHORT);
t.show();
}
else{
TextView name = (TextView) findViewById(R.id.name);
TextView id = (TextView) findViewById(R.id.id);
TextView gender = (TextView) findViewById(R.id.gender);
TextView link = (TextView) findViewById(R.id.link);
name.setText(user.name);
id.setText(user.id);
gender.setText(user.gender);
link.setText(user.link);
}
}
#Override
public void setImage(Bitmap bitmap) {
// TODO Auto-generated method stub
if(bitmap != null){
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageBitmap(bitmap);
}
}
}
pictureAsync.java
package com.example.facebookprofile;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
public class pictureAsync extends AsyncTask<String, Integer, Bitmap> {
Context context;
onImageDownloaded delegate;
public interface onImageDownloaded{
public void setImage(Bitmap bitmap);
}
public pictureAsync(Context context) {
this.context = context;
}
#Override
protected Bitmap doInBackground(String... params) {
String picUrl = params[0];
try {
URL url = new URL(picUrl);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
if(delegate!=null)
delegate.setImage(result);
}
}
profileAsync.java
package com.example.facebookprofile;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Scanner;
import javax.net.ssl.HttpsURLConnection;
import org.json.JSONException;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
public class profileAsync extends AsyncTask<String, Integer, User> {
profileImplement delegate;
Context context;
ProgressDialog dialog;
public profileAsync(Context context) {
this.context = context;
}
#Override
public void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(context);
dialog.setMessage("Loading...Please wait");
dialog.show();
}
public interface profileImplement{
public void update(User user);
}
#Override
protected User doInBackground(String... arg) {
String user = arg[0];
try {
URL url = new URL(user);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.connect();
InputStream input = connection.getInputStream();
if(input == null) return null;
Scanner networkScanner = new Scanner(input);
StringBuffer buffer = new StringBuffer();
int count = 0;
while(networkScanner.hasNext()){
String line = networkScanner.next();
count += line.length();
//publishProgress(count);
buffer.append(line);
}
networkScanner.close();
return MainActivity.parseJSON(buffer.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(User result) {
dialog.dismiss();
if(delegate != null)
delegate.update(result);
}
// protected void onProgressUpdate(Integer... values) {
// // TODO Auto-generated method stub
// super.onProgressUpdate(values);
// dialog.setMessage("downloaded: " + values[0]);
// }
}
User.java
package com.example.facebookprofile;
public class User {
String name;
String username;
String id;
String gender;
String link;
User(String name, String username , String id , String gender , String link){
this.name = name;
this.username = username;
this.id = id;
this.gender = gender;
this.link = link;
}
}

It is a feature gone deprecated.

I Want to know how to connect database........?

I am new for Android i want to know how to connect database.I saw one video in you tube and i follow hole video but its not working.i don't know where i made mistake. please help me.from one week an words i'm trying but now also i'm not getting solution please help me stack over flow.
class ServerRequests {
ProgressDialog progressDialog;
public static final int CONNECTION_TIMEOUT=1000*15;
public static final String
SERVER_ADDRESS="http://192.168.1.11/myfolder/new1.php";
public ServerRequests(Context context){
progressDialog=new ProgressDialog(context);
progressDialog.setCancelable(false);
progressDialog.setTitle("processing");
progressDialog.setMessage("please wait.....");
}
public void storeUserDataInBackground(User user,GetUserCallbackuserCallback{
progressDialog.show();
new StoreUserDataAsyncTask(user,userCallback).execute();
}
public void fetchUserDataInBackground(User user,GetUserCallback callBack){
progressDialog.show();
new fetchUserDataAsynctask(user,callBack).execute();
}
public class StoreUserDataAsyncTask extends AsyncTask<Void,Void,Void>{
User user;
GetUserCallback userCallback;
public StoreUserDataAsyncTask(User user,GetUserCallback userCallback){
this.user=user;
this.userCallback=userCallback;
}
#Override
protected Void doInBackground(Void... params) {
ArrayList<NameValuePair>dataToSend=new ArrayList<>();
dataToSend.add(new BasicNameValuePair("name",user.name));
dataToSend.add(new BasicNameValuePair("age",user.age + ""));
dataToSend.add(new BasicNameValuePair("username",user.username));
dataToSend.add(new BasicNameValuePair("password",user.password));
HttpParams httpRequestParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpRequestParams,CONNECTION_TIMEOUT);
HttpConnectionParams.setSoTimeout(httpRequestParams,CONNECTION_TIMEOUT);
HttpClient client = new DefaultHttpClient(httpRequestParams);
HttpPost post = new HttpPost(SERVER_ADDRESS + "Register.php");
try{
post.setEntity(new URLEncoderFormEntity(dataToSend));
client.execute(post);
}catch (Exception e){
e.printStackTrace();
}
return null;
}
#Override
protected void onpostExecute(Void aVoid){
progressDialog.dismiss();
userCallback.done(null);
super.onPostExecute(aVoid);
}
}
public fetchUserDataAsyncTask extends AsyncTask<Void,Void,User>{
User user;
GetUserCallback userCallback;
public fetchUserDataAsyncTask(User user,GetUserCallback userCallback){
this.user=user;
this.userCallback = userCallback;
}
#Override
protected User doInBackground(Void... params){
ArrayList<NameValuePair>dataToSend=new ArrayList<>();
dataToSend.add(new BasicNameValuePair("username",user.username));
dataToSend.add(new BasicNameValuePair("password",user.password));
HttpParams httpRequestParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpRequestParams, CONNECTION_TIMEOUT);
HttpConnectionParams.setSoTimeout(httpRequestParams, CONNECTION_TIMEOUT);
HttpClient client = new DefaultHttpClient(httpRequestParams);
HttpPost post = new HttpPost(SERVER_ADDRESS + "FetchUserData.php");
User returnedUser=null;
try{
post.setEntity(new URLEncoderFormEntity(dataToSend));
HttpResponce httpResponce=client.execute(post);
HttpEntity entity=httpResponce.getEntity();
String result= EntityUtils.toString(entity);
JSONObject jObject=new JSONObject(result);
if (jObject.length()==0){
user=null;
}else{
String name=jObject.getString("name");
int age =jObject.getInt("age");
returnedUser=new User(name,age,user.username,user.password);
}
}catch (Exception e){
e.printStackTrace();
}
return returnedUser;
}
#Override
protected void onPostExecute(User returnedUser){
progressDialog.dismiss();
userCallback.done(null);
super.onPostExecute(returnedUser);
}
}
}
enter code here
public class LoginActivity extends AppCompatActivity implements View.OnClickListener {
Button blogin;
EditText etusername,etpassword;
TextView tvregister;
UserLocalStore userLocalStore;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
etusername=(EditText)findViewById(R.id.username_edit);
etpassword=(EditText)findViewById(R.id.password_edit);
blogin=(Button)findViewById(R.id.login_button);
tvregister=(TextView)findViewById(R.id.tv_register);
blogin.setOnClickListener(this);
tvregister.setOnClickListener(this);
userLocalStore=new UserLocalStore(this);
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.login_button:
String username=etusername.getText().toString();
String password=etpassword.getText().toString();
User user=new User(username,password);
authenticate(user);
userLocalStore.storeUserData(user);
userLocalStore.setUserLoggedIn(true);
break;
case R.id.tv_register:
startActivity(new Intent(this,RegisterActivity.class));
break;
}
}
private void authenticate(User user) {
ServerRequests serverRequests = new ServerRequests(this);
serverRequests.fetchUserDataInBackground(user, new GetUserCallback() {
#Override
public void done(User returnedUser) {
if (returnedUser == null) {
showErrorMessage();
}else {
logUserIn(returnedUser);
}
}
});
}
private void showErrorMessage() {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(LoginActivity.this);
dialogBuilder.setMessage("Incorrect user details");
dialogBuilder.setPositiveButton("ok", null);
dialogBuilder.show();
}
private void logUserIn(User returnedUser){
userLocalStore.storeUserData(returnedUser);
userLocalStore.setUserLoggedIn(true);
startActivity(new Intent(this,MainActivity.class));
}
}

Here is the link which you can refer for fetching data from server.
For Creating Web Service using PHP Click here
<?php
include("connect.php");
$result="";
//get data from users (name for user variable is p1 and p2
//here I am stroing this value to par1 and par2
//method i am using is GET
$par1=$_GET['p1'];
$par2=$_GET['p2'];
$eve = "select * from table where field1='$par1' and field2='$par2'";
$re = mysql_query($eve);
$response = array();
$posts = array();
while($rt = mysql_fetch_array($re))
{
$f1=$rt['field1'];
$f2=$rt['field2'];
break;
}
$posts[] = array('p1'=> $f1,'p2'=> $f2);
$response['posts'] = $posts;
echo stripslashes(json_encode( array('item' => $posts)));
?>
For AsyncTask Example Click here
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class Login extends AppCompatActivity {
boolean remember;
private ProgressDialog pDialog;
public static final String PREFS_NAME = "Preference";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
((Button) findViewById(R.id.btnlogin)).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Login Validation
try {
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Verifying...");
pDialog.show();
LoginVerifyTask g = new LoginVerifyTask();
g.execute(((EditText) findViewById(R.id.mobile)).getText().toString(), ((EditText) findViewById(R.id.password)).getText().toString());
} catch (Exception e) {
Log.e("cs", "catch error");
}
}
});
((TextView) findViewById(R.id.newuserregistrationtxtview)).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(), Registration1.class);
startActivity(i);
}
});
}
public class LoginVerifyTask extends AsyncTask<String, Void, String>
{
String u,p;
void LoginActivity(String s)
{
}
#Override
protected void onPostExecute(String json) {
// TODO Auto-generated method stub
pDialog.dismiss();
pDialog = null;
if (json == null)
{
return;
}
String csv="";
try {
JSONObject js = new JSONObject(json);
JSONArray user = js.getJSONArray("item");
for(int i=0;i<user.length();i++)
{
JSONObject j2 = user.getJSONObject(i);
//received data
String result = j2.get("p1").toString();
break;
}
}
catch(JSONException js)
{
}
return;
}
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
u = params[0];
p = params[1];
String tempdata="";
String buffer="";
try
{
URL url = new URL("http://websitename.com/folder/webservice.php?p1=" + params[0].replace(" ", "%20") + "&p2=" + params[1].replace(" ", "%20"));
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.connect();
InputStream is = conn.getInputStream();
//buffer = new String();
if(is==null)
{
return tempdata;
}
else
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line="";
while( (line = reader.readLine())!=null)
{
buffer += line;
}
return buffer;
}
}
catch(Exception e)
{
Log.e("cs", e.toString());
}
return buffer;
}
}
}

android application checking user role with database

First of all i would like to say that im very new to developing android and right now im just following a tutorial on how to develop an application that also uses login.
i have already finished to check if the user exist and the app will display a status saying if the login is a success.
now i would like to check if the user has an administrator role or a user role which is saved in the database.
tqvm in advanced.
below is the coding
1. MainActivity.java
package com.example.user.mysqldemo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
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.etUserName);
PasswordEt = (EditText) findViewById(R.id.etPassword);
}
public void OnLogin(View view){
String username = UsernameEt.getText().toString();
String password = PasswordEt.getText().toString();
String type = "login";
BackgroundWorker backgroundWorker = new BackgroundWorker(this);
backgroundWorker.execute(type, username, password);
}
}
2.BackgroundWorker.java
public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;
BackgroundWorker (Context ctx) {
context = ctx;
}
#Override
protected String doInBackground(String... params) {
String type = params[0];
String login_url = "http://ipaddress/foldername/login.php";
if(type.equals("login")) {
try {
String user_name = params[1];
String password = params[2];
URL url = new URL(login_url);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("user_name","UTF-8")+"="+URLEncoder.encode(user_name,"UTF-8")+"&"
+URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.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();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} 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);
}
}

You login.php script must return the value of the login status and also the role of the person in the response.
A JSON structure like this,
{
"status" = 1, //0 or 1 depending on login result
"role" = 1 //a number based on the user type
}
Then you can parse this JSON result in onPostExecute and display the results.
#Override
protected void onPostExecute(String result) {
JSONObject jso = new JSONObject(result);
int status = jso.getInt("status")
int role = jso.getInt("role")
if(status == 1){
alertDialog.setMessage(result);
alertDialog.show();
if(role == 0){
//User
} else if(role == 1){
//Admin
}
} else{
//Login Failed
}
}

Cannot display toast in a catch

package com.example.m2mai;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
public class RetrieveActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_retrieve);
}
public void getStream(View v)
{
new MyAsyncTask().execute();
}
private class MyAsyncTask extends AsyncTask<String, Void, String>
{
ArrayList<String> mNameList = new ArrayList<String>();
public ArrayList<String> atList=new ArrayList<String>();
public ArrayList<String> dataList=new ArrayList<String>();
protected String doInBackground(String... params)
{
return getData();
}
public long getDateTo()
{
EditText toText = (EditText)findViewById(R.id.dateTo);
String To = toText.getText().toString();
DateFormat dateFormatTo = new SimpleDateFormat("dd/MM/yyyy");
Date dateTo = null;
try {
dateTo = dateFormatTo.parse(To);
} catch (java.text.ParseException e) {
.runOnUiThread(new Runnable(){
public void run() {
Toast.makeText(getApplicationContext(),"Please key in the correct input", Toast.LENGTH_LONG).show();
}
});
e.printStackTrace();
}
long timeTo = dateTo.getTime();
new Timestamp(timeTo);
return timeTo/1000;
}
protected String getData()
{
String toTS = ""+getDateTo();
String decodedString="";
String returnMsg="";
String request = "http://api.carriots.com/devices/defaultDevice#eric3231559.eric3231559/streams/?order=-1&max=10&at_to="+toTS;
URL url;
HttpURLConnection connection = null;
try {
url = new URL(request);
connection = (HttpURLConnection) url.openConnection();
connection.addRequestProperty("carriots.apikey", "1234567");
connection.addRequestProperty("Content-Type", "application/json");
connection.setRequestMethod("GET");
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((decodedString = in.readLine()) != null)
{
returnMsg+=decodedString;
}
in.close();
connection.disconnect();
JSONObject nodeRoot = new JSONObject(returnMsg);
JSONArray res = nodeRoot.getJSONArray("result");
for (int i = 0; i < res.length(); i++)
{
JSONObject childJSON = res.getJSONObject(i);
if (childJSON.get("data")!=null)
{
String value = childJSON.getString("data");
dataList.add(value);
JSONObject node=new JSONObject(value);
atList.add(node.get("temperature").toString());
}
}
}
catch (Exception e)
{
e.printStackTrace();
returnMsg=""+e;
}
return returnMsg;
}
protected void onPostExecute(String result)
{
for(int i = 0; i < atList.size(); i++)
{
ListView mainListView = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> mArrayAdapter = new ArrayAdapter<String>(RetrieveActivity.this,android.R.layout.simple_list_item_1,mNameList);
mainListView.setAdapter(mArrayAdapter);
mNameList.add(atList.get(i).toString());
mArrayAdapter.notifyDataSetChanged();
}
Toast.makeText(getApplicationContext(),result, Toast.LENGTH_SHORT).show();
EditText myData1=(EditText)findViewById(R.id.editText1);
myData1.setText(atList.get(0));
}
}
}
How can I actually display a toast without stoping it? Whenever it falls into the catch it is not responding.
............................................................................................................................................................................................................................................................................

If you are using try-catch in a worker thread and want to display Toast, then I am afraid it is not going to work. You will have to do it in Main(UI) thread.
Try following:
try {
dateTo = dateFormatTo.parse(To);
}
catch (java.text.ParseException e) {
your_activity_context.runOnUiThread(new Runnable(){
public void run() {
Toast.makeText(getApplicationContext(),"Please key in the correct input", Toast.LENGTH_LONG).show();
}
});
e.printStackTrace();
}

Try following:
In getDateTo():
try {
dateTo = dateFormatTo.parse(To);
} catch (java.text.ParseException e) {
runOnUiThread(new Runnable(){
public void run() {
Toast.makeText(getApplicationContext(),"Please key in the correct input", Toast.LENGTH_LONG).show();
}
});
e.printStackTrace();
return -1L; // attention here
}
In getData():
long dateTo = -1L;
if((dateTo = getDateTo()) == -1L){
return null;
}
String toTS = "" + getDateTo();
In onPostExecute:
if(result == null) {
return;
}

Make boolean flag = false; globally.
Inside catch block make flag = true;
Run Toast inside an if block like
if (flag) {
Toast.makeText(this, "Sorry, Couldn't find anything!", Toast.LENGTH_LONG).show();
}
inside your onclick method.