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Android Shared Preferences : Login Username/Password (PHP/MySQL)

Android Shared Preferences : Login Username/Password (PHP/MySQL) บทความนี้จะเป็นการเขียน Android App ประยุกต์การใช้งาน Shared Preferences กับการ Login ผ่านระบบ Database ของ MySQL ซึ่งจะใช้ PHP ทำงานในฝั่ง Web Server โดยใน Application ของ Android จะส่งค่า Username/Password ไปตรวจสอบที่ Web Server เมื่อข้อมูลถูกต้องทางฝั่ง Web Server จะส่งสถานะกลับมายัง Android App พร้อมด้วย UserID ที่ถูกต้อง ซึ่งบน Android App จะนำค่า UserID หรือ MemberID นี้จัดเก็บลงใน Shared Preferences เพื่อไปใช้งานในส่วนอื่น ๆ ของ App การทำงานนี้จะคล้าย ๆ กับระบบสมาชิกที่ทำงานบน Web Application ในรูปแบบของ Session ทั่ว ๆ ไป

Android Login (PHP/MySQL) Shared Preferences (Session)

Android Shared Preferences : Login Username/Password (PHP/MySQL)


AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />

ในการเขียน Android เพื่อติดต่อกับ Internet จะต้องกำหนด Permission ในส่วนนี้ด้วยทุกครั้ง

Web Server (PHP and MySQL)

member
CREATE TABLE `member` (
`MemberID` int(2) NOT NULL auto_increment,
`Username` varchar(50) NOT NULL,
`Password` varchar(50) NOT NULL,
`Name` varchar(50) NOT NULL,
`Tel` varchar(50) NOT NULL,
`Email` varchar(150) NOT NULL,
PRIMARY KEY (`MemberID`),
UNIQUE KEY `Username` (`Username`),
UNIQUE KEY `Email` (`Email`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=4 ;

-- 
-- Dumping data for table `member`
-- 

INSERT INTO `member` VALUES (1, 'weerachai', '[email protected]', 'Weerachai Nukitram', '0819876107', '[email protected]');
INSERT INTO `member` VALUES (2, 'adisorn', '[email protected]', 'Adisorn Bunsong', '021978032', '[email protected]');
INSERT INTO `member` VALUES (3, 'surachai', '[email protected]', 'Surachai Sirisart', '0876543210', '[email protected]');

Android Login (PHP/MySQL) Shared Preferences (Session)

โครงสร้างของข้อมูล MySQL Database

checkLogin.php (ไฟล์ PHP ใช้สำหรับตรวจสอบ Username และ Password)
<?php
	$objConnect = mysql_connect("localhost","root","root");
	$objDB = mysql_select_db("mydatabase");

	//$_POST["strUser"] = "weerachai"; // for Sample
	//$_POST["strUser"] = "[email protected]";  // for Sample

	$strUsername = $_POST["strUser"];
	$strPassword = $_POST["strPass"];
	$strSQL = "SELECT * FROM member WHERE 1 
		AND Username = '".$strUsername."'  
		AND Password = '".$strPassword."'  
		";

	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	$intNumRows = mysql_num_rows($objQuery);
	if($intNumRows==0)
	{
		$arr['StatusID'] = "0"; 
		$arr['MemberID'] = "0"; 
		$arr['Error'] = "Incorrect Username and Password";	
	}
	else
	{
		$arr['StatusID'] = "1"; 
		$arr['MemberID'] = $objResult["MemberID"]; 
		$arr['Error'] = "";	
	}

	/**
		$arr['StatusID'] // (0=Failed , 1=Complete)
		$arr['MemberID'] // MemberID
		$arr['Error' // Error Message
	*/
	
	mysql_close($objConnect);
	
	echo json_encode($arr);
?>


getByMemberID.php (ไฟล์ PHP ใช้สำหรับอ่านรายละเอียดของ User)
<?php
	$objConnect = mysql_connect("localhost","root","root");
	$objDB = mysql_select_db("mydatabase");
	
	//$_POST["sMemberID"] = "1"; // for Sample

	$strMemberID = $_POST["sMemberID"];
	$strSQL = "SELECT * FROM member WHERE 1 AND MemberID = '".$strMemberID."'  ";

	$objQuery = mysql_query($strSQL);
	$obResult = mysql_fetch_array($objQuery);
	if($obResult)
	{
		$arr["MemberID"] = $obResult["MemberID"];
		$arr["Username"] = $obResult["Username"];
		$arr["Password"] = $obResult["Password"];
		$arr["Name"] = $obResult["Name"];
		$arr["Email"] = $obResult["Email"];
		$arr["Tel"] = $obResult["Tel"];
	}

	
	mysql_close($objConnect);

	/*** return JSON by MemberID ***/
	/* Eg :
	{"MemberID":"2",
	"Username":"adisorn",
	"Password":"[email protected]",
	"Name":"Adisorn Bunsong",
	"Tel":"021978032",
	"Email":"[email protected]"}
	*/
	
	echo json_encode($arr);
?>


Example การสร้าง Login กับ PHP/MySQL เพื่อเก็บค่า UserID หรือ MemberID นำไปใช้งานใน Activity อื่น ๆ

Android Login (PHP/MySQL) Shared Preferences (Session)

โครงสร้างของไฟล์ที่จะใช้สามารถใช้ได้ทั้งบน Eclipse และ Android Studio








UserHelper.java
package com.myapp;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

public class UserHelper {

	Context context;
	SharedPreferences sharedPerfs;
	Editor editor;
	
	// Prefs Keys
	static String perfsName = "UserHelper";
	static int perfsMode = 0;
	
	public UserHelper(Context context) {
		this.context = context;
		this.sharedPerfs = this.context.getSharedPreferences(perfsName, perfsMode);
		this.editor = sharedPerfs.edit();
	}
	
	public void createSession(String sMemberID) {
		
		editor.putBoolean("LoginStatus", true);
		editor.putString("MemberID", sMemberID);
		
        editor.commit();
	}
	
	public void deleteSession() {
		editor.clear();
		editor.commit();
	}
	
	public boolean getLoginStatus() {
		return sharedPerfs.getBoolean("LoginStatus", false);
	}
	
	public String getMemberID() {
		return sharedPerfs.getString("MemberID", null);
	}
}


NetConnect.java
package com.myapp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
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.impl.client.DefaultHttpClient;

import android.util.Log;

public class NetConnect {

	public static String getHttpPost(String url,List<NameValuePair> params) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost(url);
		
		try {
			httpPost.setEntity(new UrlEncodedFormEntity(params,"UTF-8"));
			HttpResponse response = client.execute(httpPost);
			StatusLine statusLine = response.getStatusLine();
			int statusCode = statusLine.getStatusCode();
			if (statusCode == 200) { // Status OK
				HttpEntity entity = response.getEntity();
				InputStream content = entity.getContent();
				BufferedReader reader = new BufferedReader(new InputStreamReader(content));
				String line;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
			} else {
				Log.e("Log", "Failed to download result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}
	
	
	public static String getHttpGet(String url) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		try {
			HttpResponse response = client.execute(httpGet);
			StatusLine statusLine = response.getStatusLine();
			int statusCode = statusLine.getStatusCode();
			if (statusCode == 200) { // Download OK
				HttpEntity entity = response.getEntity();
				InputStream content = entity.getContent();
				BufferedReader reader = new BufferedReader(new InputStreamReader(content));
				String line;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
			} else {
				Log.e("Log", "Failed to download result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}
	
}


Android Login (PHP/MySQL) Shared Preferences (Session)

activity_main.xml
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tableLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
   	<TableRow
      android:id="@+id/tableRow1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" >
     
     <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="Login Form "
        android:layout_span="1"
        android:textAppearance="?android:attr/textAppearanceLarge" />
  	        
 	</TableRow>

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
 
  <TableLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.1"
        android:orientation="horizontal">

      <TextView
          android:id="@+id/textView3"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Input Username :"
          android:textAppearance="?android:attr/textAppearanceMedium" />

      <EditText
          android:id="@+id/txtUsername"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:ems="10" >
      </EditText>

	<TextView
          android:id="@+id/textView4"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Input Password :"
          android:textAppearance="?android:attr/textAppearanceMedium" />

      <EditText
          android:id="@+id/txtPassword"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:ems="10"
          android:inputType="textPassword" >
      </EditText>

		<Button
		    android:id="@+id/btnLogin"
		    android:layout_width="wrap_content"
		    android:layout_height="wrap_content"
		    android:text="Login" />
		
  	        
 	</TableLayout >

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
   		  
   	<LinearLayout
      android:id="@+id/LinearLayout1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:padding="5dip" >

   		<TextView
   		    android:id="@+id/textView2"
   		    android:layout_width="wrap_content"
   		    android:layout_height="wrap_content"
   		    android:text="By.. ThaiCreate.Com" />

	</LinearLayout>
	
</TableLayout>


Android Login (PHP/MySQL) Shared Preferences (Session)

activity_main2.xml
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tableLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
   	<TableRow
      android:id="@+id/tableRow1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" >
     
     <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="User info (Page 2) "
        android:layout_span="1"
        android:textAppearance="?android:attr/textAppearanceLarge" />
  	        
 	</TableRow>

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
 
  <TableLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.1"
        android:orientation="horizontal">
     
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="MemberID : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtMemberID"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="MemberID" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Username : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtUsername"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Username" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Password : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtPassword"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Password" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Name : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtName"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Name" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Email : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtEmail"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Email" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Tel : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtTel"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Tel" />
	    </TableRow>

	    <Button
	        android:id="@+id/btnNext"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="Next" />
	    
 	</TableLayout >

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
   		  
   	<LinearLayout
      android:id="@+id/LinearLayout1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:padding="5dip" >

   		<TextView
   		    android:id="@+id/textView2"
   		    android:layout_width="wrap_content"
   		    android:layout_height="wrap_content"
   		    android:text="By.. ThaiCreate.Com" />

	</LinearLayout>
	
</TableLayout>


Android Login (PHP/MySQL) Shared Preferences (Session)

activity_main3.xml
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tableLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
   	<TableRow
      android:id="@+id/tableRow1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" >
     
     <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="User info (Page 3) "
        android:layout_span="1"
        android:textAppearance="?android:attr/textAppearanceLarge" />
  	        
 	</TableRow>

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
 
  <TableLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.1"
        android:orientation="horizontal">
     
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="MemberID : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtMemberID"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="MemberID" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Username : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtUsername"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Username" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Password : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtPassword"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Password" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Name : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtName"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Name" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Email : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtEmail"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Email" />
	    </TableRow>
	    
	    <TableRow 
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content">
		      <TextView
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Tel : "
		          android:textAppearance="?android:attr/textAppearanceMedium" />
		
		      <TextView
		          android:id="@+id/txtTel"
		          android:layout_width="wrap_content"
		          android:layout_height="wrap_content"
		          android:text="Tel" />
	    </TableRow>

	    <Button
	        android:id="@+id/btnLogout"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="Logout" />
	    
 	</TableLayout >

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
   		  
   	<LinearLayout
      android:id="@+id/LinearLayout1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:padding="5dip" >

   		<TextView
   		    android:id="@+id/textView2"
   		    android:layout_width="wrap_content"
   		    android:layout_height="wrap_content"
   		    android:text="By.. ThaiCreate.Com" />

	</LinearLayout>
	
</TableLayout>









ไฟล์ Java

MainActivity.java
package com.myapp;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
        //*** Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }	
		
		//*** Session Login
		final UserHelper usrHelper = new UserHelper(this);
		
        //*** txtUsername & txtPassword
        final EditText txtUser = (EditText)findViewById(R.id.txtUsername); 
        final EditText txtPass = (EditText)findViewById(R.id.txtPassword); 
        
      //*** Alert Dialog
        final AlertDialog.Builder ad = new AlertDialog.Builder(this);
		
		//*** Login Button
		final Button btnLogin = (Button) findViewById(R.id.btnLogin);
		btnLogin.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	
            	String url = "https://www.thaicreate.com/android/checkLogin.php";
        		List<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("strUser", txtUser.getText().toString()));
                params.add(new BasicNameValuePair("strPass", txtPass.getText().toString()));
                
                /** Get result from Server (Return the JSON Code)
                 * StatusID = ? [0=Failed,1=Complete]
                 * MemberID = ? [Eg : 1]
                 * Error	= ?	[On case error return custom error message]
                 * 
                 * Eg Login Failed = {"StatusID":"0","MemberID":"0","Error":"Incorrect Username and Password"}
                 * Eg Login Complete = {"StatusID":"1","MemberID":"2","Error":""}
                 */
                
            	String resultServer  = NetConnect.getHttpPost(url,params);
                
                /*** Default Value ***/
            	String strStatusID = "0";
            	String strMemberID = "0";
            	String strError = "Unknow Status!";
            	
            	JSONObject c;
				try {
					c = new JSONObject(resultServer);
	            	strStatusID = c.getString("StatusID");
	            	strMemberID = c.getString("MemberID");
	            	strError = c.getString("Error");
	            	
				} catch (JSONException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
						
				// Prepare Login
				if(strStatusID.equals("0"))
				{
					// Dialog
					ad.setTitle("Error! ");
					ad.setIcon(android.R.drawable.btn_star_big_on); 
					ad.setPositiveButton("Close", null);
					ad.setMessage(strError);
					ad.show();
					txtUser.setText("");
					txtPass.setText("");
				}
				else
				{
					Toast.makeText(MainActivity.this, "Login OK", Toast.LENGTH_SHORT).show();
					
	        		// Create Session
					usrHelper.createSession(strMemberID);
					
					// Goto Activity2
	            	Intent newActivity = new Intent(MainActivity.this,MainActivity2.class);
	            	startActivity(newActivity);
	            	
				}
           	            				
            }
        });		
		
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}


MainActivity2.java
package com.myapp;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity2 extends Activity {

	String strMemberID = "";
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main2);
		
        //*** Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }		
		
		//*** Get Session Login
		final UserHelper usrHelper = new UserHelper(this);
		       
        //*** Get Login Status
        if(!usrHelper.getLoginStatus())
        {
        	Intent newActivity = new Intent(MainActivity2.this, MainActivity.class);
        	startActivity(newActivity);
        }
        
        //*** Get Member ID from Session
        strMemberID = usrHelper.getMemberID();
        
        //*** Show User Info
        showInfo();
        
		//*** Button Next
		final Button btnNext = (Button) findViewById(R.id.btnNext);
		btnNext.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {				
				// Goto Activity 2
            	Intent newActivity = new Intent(MainActivity2.this,MainActivity3.class);
            	startActivity(newActivity);
            }
        });	   
        
	}
	
    public void showInfo()
    {
    	// txtMemberID,txtMemberID,txtUsername,txtPassword,txtName,txtEmail,txtTel
    	final TextView tMemberID = (TextView)findViewById(R.id.txtMemberID);
    	final TextView tUsername = (TextView)findViewById(R.id.txtUsername);
    	final TextView tPassword = (TextView)findViewById(R.id.txtPassword);
    	final TextView tName = (TextView)findViewById(R.id.txtName);
    	final TextView tEmail = (TextView)findViewById(R.id.txtEmail);
    	final TextView tTel = (TextView)findViewById(R.id.txtTel);
    	
    	String url = "https://www.thaicreate.com/android/getByMemberID.php";
    	
		List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("sMemberID", strMemberID));

        /** Get result from Server (Return the JSON Code)
         * 
         * {"MemberID":"2","Username":"adisorn","Password":"[email protected]","Name":"Adisorn Bunsong","Tel":"021978032","Email":"[email protected]"}
         */
        
    	String resultServer  = NetConnect.getHttpPost(url,params);
        
    	String strMemberID = "";
    	String strUsername = "";
    	String strPassword = "";
    	String strName = "";
    	String strEmail = "";
    	String strTel = "";
    	
    	JSONObject c;
		try {
			c = new JSONObject(resultServer);
			strMemberID = c.getString("MemberID");
			strUsername = c.getString("Username");
			strPassword = c.getString("Password");
			strName = c.getString("Name");
			strEmail = c.getString("Email");
			strTel = c.getString("Tel");
			
			if(!strMemberID.equals(""))
			{
				tMemberID.setText(strMemberID);
				tUsername.setText(strUsername);
				tPassword.setText(strPassword);
				tName.setText(strName);
				tEmail.setText(strEmail);
				tTel.setText(strTel);
			}
			else
			{
				tMemberID.setText("-");
				tUsername.setText("-");
				tPassword.setText("-");
				tName.setText("-");
				tEmail.setText("-");
				tTel.setText("-");		
			}
        	
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
    }
    

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}


MainActivity3.java
package com.myapp;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity3 extends Activity {
	
	String strMemberID = "";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main3);
		
        //*** Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }		
		
		//*** Get Session Login
		final UserHelper usrHelper = new UserHelper(this);
        
        //*** Get Login Status
        if(!usrHelper.getLoginStatus())
        {
        	Intent newActivity = new Intent(MainActivity3.this, MainActivity.class);
        	startActivity(newActivity);
        }
        
        //*** Get Member ID from Session
        strMemberID = usrHelper.getMemberID();
        
        //*** Show User Info
        showInfo();
        
		//*** Button Logout
		final Button btnLogout = (Button) findViewById(R.id.btnLogout);
		btnLogout.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {	
            	// Clear Session
            	usrHelper.deleteSession();
            	
				// Goto Acitity2
            	Intent newActivity = new Intent(MainActivity3.this,MainActivity.class);
            	startActivity(newActivity);
            }
        });	 
		
	}
	
	public void showInfo()
    {
    	// txtMemberID,txtMemberID,txtUsername,txtPassword,txtName,txtEmail,txtTel
    	final TextView tMemberID = (TextView)findViewById(R.id.txtMemberID);
    	final TextView tUsername = (TextView)findViewById(R.id.txtUsername);
    	final TextView tPassword = (TextView)findViewById(R.id.txtPassword);
    	final TextView tName = (TextView)findViewById(R.id.txtName);
    	final TextView tEmail = (TextView)findViewById(R.id.txtEmail);
    	final TextView tTel = (TextView)findViewById(R.id.txtTel);
    	
    	String url = "https://www.thaicreate.com/android/getByMemberID.php";
    	
		List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("sMemberID", strMemberID));

        /** Get result from Server (Return the JSON Code)
         * 
         * {"MemberID":"2","Username":"adisorn","Password":"[email protected]","Name":"Adisorn Bunsong","Tel":"021978032","Email":"[email protected]"}
         */
        
    	String resultServer  = NetConnect.getHttpPost(url,params);
        
    	String strMemberID = "";
    	String strUsername = "";
    	String strPassword = "";
    	String strName = "";
    	String strEmail = "";
    	String strTel = "";
    	
    	JSONObject c;
		try {
			c = new JSONObject(resultServer);
			strMemberID = c.getString("MemberID");
			strUsername = c.getString("Username");
			strPassword = c.getString("Password");
			strName = c.getString("Name");
			strEmail = c.getString("Email");
			strTel = c.getString("Tel");
			
			if(!strMemberID.equals(""))
			{
				tMemberID.setText(strMemberID);
				tUsername.setText(strUsername);
				tPassword.setText(strPassword);
				tName.setText(strName);
				tEmail.setText(strEmail);
				tTel.setText(strTel);
			}
			else
			{
				tMemberID.setText("-");
				tUsername.setText("-");
				tPassword.setText("-");
				tName.setText("-");
				tEmail.setText("-");
				tTel.setText("-");		
			}
        	
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
    }

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}


AndroidManifest.xml
        <activity 
		    android:name=".MainActivity2"
		    android:label="@string/app_name" /> 	
		    
        <activity 
		    android:name=".MainActivity3"
		    android:label="@string/app_name" /> 




Screenshot

Android Login (PHP/MySQL) Shared Preferences (Session)

หน้า Login กรอก Username และ Password เพื่อทำการ Login

Android Login (PHP/MySQL) Shared Preferences (Session)

กรณีที่ Login ไม่ถูกต้องจะแจ้ง Error Message

Android Login (PHP/MySQL) Shared Preferences (Session)

กรณีที่ Login ถูกต้องจะมีการจัดเก็บค่า UserID หรือ MemberID เพื่อไปใช้งานยัง Activity อื่น ๆ

Android Login (PHP/MySQL) Shared Preferences (Session)

นำค่า UserID หรือ MemberID เพื่อไปใช้งานยัง Activity อื่น ๆ


.

   
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ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท


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  By : ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
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  Create/Update Date : 2015-11-16 15:53:54 / 2017-03-26 21:06:08
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