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Android and Image Gallery Slideshow from Server

Android and Image Gallery Slideshow from Server บทความการสร้าง Gallery Image และการดึงรุปภาพที่เป็น Thumbnail และ Full Photo มาแสดงบนหน้าจอของ Application หลักการก็คือใช้ PHP และ MySQL ที่ทำงานอยู่ใน Web Server เก็บ Gallery ลงใน Database ซึ่งหลัก ๆ จะเก็บภาพที่เป็น Thumbnail และ Full Photo โดยภาพที่เป็น Thumbnail จะแสดงใน ListView ส่วนภาพ Full Photo จะแสดงผลตอนที่ดูรายละเอียดของแต่ล่ะภาพ ดูภาดประกอบเพื่อความเข้าใจ

Android and Image Gallery Slideshow from Server


ภาพแสดงการดึงข้อมูล Gallery จาก Web Server มาแสดงบน Application ของ Android แสดงข้อมูลในรูปแบบของ Column โดยใช้ GridView ของ Widgets เข้ามาจัดการ

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


ในการเขียน Android เพื่อติดต่อกับ Internet จะต้องกำหนด Permission ในส่วนนี้ด้วยทุกครั้ง

Web Server (PHP and MySQL)

MySQL Database
CREATE TABLE IF NOT EXISTS `images` (
  `ImageID` int(11) NOT NULL auto_increment,
  `ImageName` varchar(50) NOT NULL,
  `ImagePath_Thumbnail` varchar(150) NOT NULL,
  `ImagePath_FullPhoto` varchar(150) NOT NULL,
  PRIMARY KEY  (`ImageID`)
) ENGINE=MyISAM  AUTO_INCREMENT=7 ;

--
-- Dumping data for table `images`
--

INSERT INTO `images` (`ImageID`, `ImageName`, `ImagePath_Thumbnail`, `ImagePath_FullPhoto`) VALUES
(1, 'Image 1', 'https://www.thaicreate.com/android/img1_thum.jpg', 'https://www.thaicreate.com/android/img1_full.jpg'),
(2, 'Image 2', 'https://www.thaicreate.com/android/img2_thum.jpg', 'https://www.thaicreate.com/android/img2_full.jpg'),
(3, 'Image 3', 'https://www.thaicreate.com/android/img3_thum.jpg', 'https://www.thaicreate.com/android/img3_full.jpg'),
(4, 'Image 4', 'https://www.thaicreate.com/android/img4_thum.jpg', 'https://www.thaicreate.com/android/img4_full.jpg'),
(5, 'Image 5', 'https://www.thaicreate.com/android/img5_thum.jpg', 'https://www.thaicreate.com/android/img5_full.jpg'),
(6, 'Image 6', 'https://www.thaicreate.com/android/img6_thum.jpg', 'https://www.thaicreate.com/android/img6_full.jpg');


getByPage.php
<?php
	$objConnect = mysql_connect("localhost","root","root");
	$objDB = mysql_select_db("mydatabase");

	$strSQL = "SELECT * FROM images WHERE 1  ";
	$objQuery = mysql_query($strSQL);
	$intNumField = mysql_num_fields($objQuery);
	$resultArray = array();
	while($obResult = mysql_fetch_array($objQuery))
	{
		$arrCol = array();
		for($i=0;$i<$intNumField;$i++)
		{
			$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
		}
		array_push($resultArray,$arrCol);
	}
	
	mysql_close($objConnect);
	
	echo json_encode($resultArray);
?>



Android Project

โครงสร้างของไฟล์ประกอบด้วย 5 ไฟล์คือ MainActivity.java, PlayActivity.java, activity_main.xml, activity_column.xml และ activity_play.xml

Android and Image Gallery Slideshow from Server

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="Images Slide : "
        android:layout_span="1"
        android:textAppearance="?android:attr/textAppearanceMedium" />
  	        
 	</TableRow>

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
 
  <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.1">   
     
	    <GridView
	        android:id="@+id/gridView1"
	        android:layout_width="match_parent"
	        android:layout_height="wrap_content"
	        android:numColumns="2" >
	    </GridView>
  	        
 	</LinearLayout>

	<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 and Image Gallery Slideshow from Server

activity_column.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ImageView
        android:id="@+id/ColPhoto"
        android:layout_width="50dp"
        android:layout_height="50dp"
    />
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            
            <TextView android:id="@+id/ColID"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="ColID"
            />
        </LinearLayout>
        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            
            <TextView android:id="@+id/ColName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Name"
            />
            
        </LinearLayout>
    </LinearLayout>
</LinearLayout>


Android and Image Gallery Slideshow from Server

activity_play.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="View : "
        android:layout_span="1"
        android:textAppearance="?android:attr/textAppearanceMedium" />

     <Button
         android:id="@+id/btnHome"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Home" />

     <Button
         android:id="@+id/btnBack"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="&lt;&lt; Back" />


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

	<View
		android:layout_height="1dip"
		android:background="#CCCCCC" />
 
  <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.1">   
     
    <ImageView
        android:id="@+id/fullimage"
        android:layout_width="match_parent"
        android:layout_height="380dp" />
    
 	</LinearLayout>

	<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>



MainActivity.java
package com.myapp;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Menu;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {

	public static final int DIALOG_DOWNLOAD_JSON_PROGRESS = 0;
    private ProgressDialog mProgressDialog;
    public String resultServer = "";
    
    ArrayList<HashMap<String, Object>> MyArrList;

	
    @SuppressLint("NewApi")
	@Override
    public 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);
        }
        
	    // Download JSON File	
		new DownloadJSONFileAsync().execute();
        
    }
       
    
    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DIALOG_DOWNLOAD_JSON_PROGRESS:
            mProgressDialog = new ProgressDialog(this);
            mProgressDialog.setMessage("Downloading.....");
            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            mProgressDialog.setCancelable(true);
            mProgressDialog.show();
            return mProgressDialog;
        default:
            return null;
        }
    }
    
    // Show All Content
    public void ShowAllContent()
    {
        // gridView1
        final GridView gridV = (GridView)findViewById(R.id.gridView1); 
        gridV.setAdapter(new ImageAdapter(MainActivity.this,MyArrList));
        
        // OnClick
        gridV.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
				int position, long id) {
				String Position = String.valueOf(position);
				
				Intent newActivity = new Intent(MainActivity.this,PlayActivity.class);
				newActivity.putExtra("Position", Position);
				newActivity.putExtra("resultServer", resultServer);
				startActivity(newActivity);

			}
		});
    }
    
    

    public class ImageAdapter extends BaseAdapter 
    {
        private Context context;
        private ArrayList<HashMap<String, Object>> MyArr = new ArrayList<HashMap<String, Object>>();

        public ImageAdapter(Context c, ArrayList<HashMap<String, Object>> myArrList) 
        {
        	// TODO Auto-generated method stub
            context = c;
            MyArr = myArrList;
        }
 
        public int getCount() {
        	// TODO Auto-generated method stub
            return MyArr.size();
        }
 
        public Object getItem(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
 
        public long getItemId(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			LayoutInflater inflater = (LayoutInflater) context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		 
		 
			if (convertView == null) {
				convertView = inflater.inflate(R.layout.activity_column, null); 
			}

			// ColPhoto
			ImageView imageView = (ImageView) convertView.findViewById(R.id.ColPhoto);
			imageView.getLayoutParams().height = 80;
			imageView.getLayoutParams().width = 80;
			imageView.setPadding(10, 10, 10, 10);
			imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        	 try
        	 {
        		 imageView.setImageBitmap((Bitmap)MyArr.get(position).get("ImageThumBitmap"));
        	 } catch (Exception e) {
        		 // When Error
        		 imageView.setImageResource(android.R.drawable.ic_menu_report_image);
        	 }
				
			// ColID
			TextView txtID = (TextView) convertView.findViewById(R.id.ColID);
			txtID.setPadding(5, 0, 0, 0);
			txtID.setText("ID : " + MyArr.get(position).get("ImageID").toString());
			
			// ColName
			TextView txtName = (TextView) convertView.findViewById(R.id.ColName);
			txtName.setPadding(5, 0, 0, 0);
			txtName.setText("Name : " + MyArr.get(position).get("ImageName").toString());	
		 
			return convertView;
				
		}

    } 
    
    
    
    // Download JSON in Background
    public class DownloadJSONFileAsync extends AsyncTask<String, Void, Void> {
    	
        protected void onPreExecute() {
        	super.onPreExecute();
        	showDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
        }

        @Override
        protected Void doInBackground(String... params) {
            // TODO Auto-generated method stub

            /** JSON from URL
             * [
             * {"ImageID":"1","ImageName":"Image 1","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img1_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img1_full.jpg"},
             * {"ImageID":"2","ImageName":"Image 2","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img2_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img2_full.jpg"},
             * {"ImageID":"3","ImageName":"Image 3","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img3_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img3_full.jpg"},
             * {"ImageID":"4","ImageName":"Image 4","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img4_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img4_full.jpg"},
             * {"ImageID":"5","ImageName":"Image 5","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img5_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img5_full.jpg"},
             * {"ImageID":"6","ImageName":"Image 6","ImagePath_Thumbnail":"https://www.thaicreate.com/android/img6_thum.jpg" ,"ImagePath_FullPhoto":"https://www.thaicreate.com/android/img6_full.jpg"}
             * ]
             */
        	
        	String url = "https://www.thaicreate.com/android/getGallery.php";
        	
        	JSONArray data;
			try {
				resultServer = getJSONUrl(url);
				data = new JSONArray(resultServer);
				
		    	MyArrList = new ArrayList<HashMap<String, Object>>();
				HashMap<String, Object> map;
				
				for(int i = 0; i < data.length(); i++){
	                JSONObject c = data.getJSONObject(i);
	    			map = new HashMap<String, Object>();
	    			map.put("ImageID", (String)c.getString("ImageID"));
	    			map.put("ImageName", (String)c.getString("ImageName"));
	    			
	    			// Thumbnail Get ImageBitmap To Bitmap
	    			map.put("ImagePathThum", (String)c.getString("ImagePath_Thumbnail"));
	    			map.put("ImageThumBitmap", (Bitmap)loadBitmap(c.getString("ImagePath_Thumbnail")));
	    			
	    			// Full (for View Full)
	    			map.put("ImagePathFull", (String)c.getString("ImagePath_FullPhoto"));
	    			
	    			MyArrList.add(map);
				}
	    		
				
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

    		return null;
        }

        protected void onPostExecute(Void unused) {
        	ShowAllContent(); // When Finish Show Content
            dismissDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
            removeDialog(DIALOG_DOWNLOAD_JSON_PROGRESS);
        }
        

    }

    
    /*** Get JSON Code from URL ***/
  	public String getJSONUrl(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 file..");
  			}
  		} catch (ClientProtocolException e) {
  			e.printStackTrace();
  		} catch (IOException e) {
  			e.printStackTrace();
  		}
  		return str.toString();
  	}
   
  	
  	/***** Get Image Resource from URL (Start) *****/
	private static final String TAG = "Image";
	private static final int IO_BUFFER_SIZE = 4 * 1024;
	public static Bitmap loadBitmap(String url) {
	    Bitmap bitmap = null;
	    InputStream in = null;
	    BufferedOutputStream out = null;

	    try {
	        in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

	        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
	        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
	        copy(in, out);
	        out.flush();

	        final byte[] data = dataStream.toByteArray();
	        BitmapFactory.Options options = new BitmapFactory.Options();
	        //options.inSampleSize = 1;

	        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
	    } catch (IOException e) {
	        Log.e(TAG, "Could not load Bitmap from: " + url);
	    } finally {
	        closeStream(in);
	        closeStream(out);
	    }

	    return bitmap;
	}

	 private static void closeStream(Closeable stream) {
	        if (stream != null) {
	            try {
	                stream.close();
	            } catch (IOException e) {
	                android.util.Log.e(TAG, "Could not close stream", e);
	            }
	        }
	    }
	 
	 private static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] b = new byte[IO_BUFFER_SIZE];
        int read;
        while ((read = in.read(b)) != -1) {
            out.write(b, 0, read);
        }
    }
	 /***** Get Image Resource from URL (End) *****/
	
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}









PlayActivity.java
package com.myapp;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class PlayActivity extends Activity {

	public static final int DIALOG_DOWNLOAD_JSON_PROGRESS = 0;
    private ProgressDialog mProgressDialog;
    
    public int curPosition  = 0;
    public String resultServer;
    public ArrayList<HashMap<String, Object>> MyArrList;
    
    public Button back;
    public Button next;

	
    @SuppressLint("NewApi")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play);
        
        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        
        Intent intent= getIntent();
        curPosition = Integer.parseInt(intent.getStringExtra("Position")); 
        resultServer = String.valueOf(intent.getStringExtra("resultServer")); 
        
        try {
			MyArrList = ConvertJSONtoArrayList(resultServer);
	        
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
       
        Log.d("ArrayList Size",String.valueOf(MyArrList.size()));
        
        // Show Image Full
        new DownloadFullPhotoFileAsync().execute();
        
        // Button Home
        final Button home = (Button) findViewById(R.id.btnHome);
		// Perform action on click
        home.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
				Intent newActivity = new Intent(PlayActivity.this,MainActivity.class);
				startActivity(newActivity);
            }
        });
        
        // Button Back
        back = (Button) findViewById(R.id.btnBack);
        back.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	curPosition = curPosition - 1;
            	new DownloadFullPhotoFileAsync().execute();
            }
        });
        
        // Button Next
        next = (Button) findViewById(R.id.btnNext);
        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	curPosition = curPosition + 1;
            	new DownloadFullPhotoFileAsync().execute();
            }
        });
        
    }
    
    
    // Show Image Full
    public void ShowImageFull(String imageName, Bitmap imgFull)
    {
    	
        // Prepare Button (Back)
        if(curPosition <= 0)
        {
        	back.setEnabled(false);
        }
        else
        {
        	back.setEnabled(true);
        }
        
        // Prepare Button (Next)
        Log.d("curPosition",String.valueOf(curPosition));
        Log.d("MyArrList.size",String.valueOf(MyArrList.size()));
        if(curPosition >= MyArrList.size() - 1)
        {
        	next.setEnabled(false);
        }
        else
        {
        	next.setEnabled(true);
        }
        
       

         ImageView image = (ImageView) findViewById(R.id.fullimage);
      
     	 try
     	 {
     		image.setImageBitmap(imgFull);
     	 } catch (Exception e) {
     		 // When Error
     		image.setImageResource(android.R.drawable.ic_menu_report_image);
     	 }

     	 // Show Toast
     	Toast.makeText(PlayActivity.this,imageName,Toast.LENGTH_LONG).show();  
     	
    }

    public ArrayList<HashMap<String, Object>> ConvertJSONtoArrayList(String json) throws JSONException
    {
		
    	JSONArray data = new JSONArray(resultServer);
		
		ArrayList<HashMap<String, Object>> arr = new ArrayList<HashMap<String, Object>>();
		HashMap<String, Object> map;
		
		for(int i = 0; i < data.length(); i++){
            JSONObject c = data.getJSONObject(i);
			map = new HashMap<String, Object>();
			map.put("ImageID", (String)c.getString("ImageID"));
			map.put("ImageName", (String)c.getString("ImageName"));
			map.put("ImagePathThum", (String)c.getString("ImagePath_Thumbnail"));
			map.put("ImagePathFull", (String)c.getString("ImagePath_FullPhoto"));
			
			arr.add(map);
		}
		
		return arr;
    	
    }
    
    
    
    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DIALOG_DOWNLOAD_FULL_PHOTO_PROGRESS:
            mProgressDialog = new ProgressDialog(this);
            mProgressDialog.setMessage("Downloading.....");
            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
            mProgressDialog.setCancelable(true);
            mProgressDialog.show();
            return mProgressDialog; 
        default:
            return null;
        }
    }
    
    
    public static final int DIALOG_DOWNLOAD_FULL_PHOTO_PROGRESS = 1;
    // Download Full Photo in Background
    public class DownloadFullPhotoFileAsync extends AsyncTask<String, Void, Void> {
    	
    	String strImageName = "";
    	String ImageFullPhoto = "";
    	
    	Bitmap ImageFullBitmap = null;

        protected void onPreExecute() {
        	super.onPreExecute();
        	showDialog(DIALOG_DOWNLOAD_FULL_PHOTO_PROGRESS);
        }

        @Override
        protected Void doInBackground(String... params) {
        	strImageName = MyArrList.get(curPosition).get("ImageName").toString();
            ImageFullPhoto = MyArrList.get(curPosition).get("ImagePathFull").toString();

            ImageFullBitmap = (Bitmap)loadBitmap(ImageFullPhoto);
    		return null;
        }

        protected void onPostExecute(Void unused) {
        	ShowImageFull(strImageName,ImageFullBitmap); // When Finish Show Images
            dismissDialog(DIALOG_DOWNLOAD_FULL_PHOTO_PROGRESS);
            removeDialog(DIALOG_DOWNLOAD_FULL_PHOTO_PROGRESS);
        }
        

    }
    
    
    /***** Get Image Resource from URL (Start) *****/
	private static final String TAG = "Image";
	private static final int IO_BUFFER_SIZE = 4 * 1024;
	public static Bitmap loadBitmap(String url) {
	    Bitmap bitmap = null;
	    InputStream in = null;
	    BufferedOutputStream out = null;

	    try {
	        in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

	        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
	        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
	        copy(in, out);
	        out.flush();

	        final byte[] data = dataStream.toByteArray();
	        BitmapFactory.Options options = new BitmapFactory.Options();
	        //options.inSampleSize = 1;

	        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
	    } catch (IOException e) {
	        Log.e(TAG, "Could not load Bitmap from: " + url);
	    } finally {
	        closeStream(in);
	        closeStream(out);
	    }

	    return bitmap;
	}

	 private static void closeStream(Closeable stream) {
	        if (stream != null) {
	            try {
	                stream.close();
	            } catch (IOException e) {
	                android.util.Log.e(TAG, "Could not close stream", e);
	            }
	        }
	    }
	 
	 private static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] b = new byte[IO_BUFFER_SIZE];
        int read;
        while ((read = in.read(b)) != -1) {
            out.write(b, 0, read);
        }
    }
	 /***** Get Image Resource from URL (End) *****/
    
       
    
}





เพิ่ม PlayActivity ลงในไฟล์ AndroidManifest.xml

AndroidManifest.xml
		<activity 
		    android:name="PlayActivity"
		    android:theme="@style/AppTheme"
		    android:screenOrientation="portrait"            
		    android:label="@string/title_activity_main" />


Android and Image Gallery Slideshow from Server

Screenshot

ทดสอบการรันผ่าน Emulator

Android and Image Gallery Slideshow from Server

กำลังแสดง ProgressBar เพื่อโหลดข้อมูลจาก Web Server

Android and Image Gallery Slideshow from Server

แสดง Gallery บน GridView ทดสอบคลิกรูปที่ 1

Android and Image Gallery Slideshow from Server

เมื่อคลิกเพื่อดู Full Image ในขณะที่กำลังโหลดข้อมูลก็จะแสดง PregressBar เช่นเดียวกัน

Android and Image Gallery Slideshow from Server

แสดงรูปภาพ Full Photo เมื่อโหลดข้อมูลเรียบร้อย และสามารถกด Next >> เพื่อดูรูปอื่น ๆ

Android and Image Gallery Slideshow from Server

ในทุก ๆ ครั้งที่โหลดข้อมูลจะแสดง ProgressBar ด้วยทุกครั้ง เพื่อป้องกันโปรแกรมค้าง

Android and Image Gallery Slideshow from Server

แสดงข้อมูลเมื่อโหลดเรียบร้อย

Android and Image Gallery Slideshow from Server

กรณีหน้าสุดท้ายแล้วจะไม่สามารถคลิกเลือก Next >> ได้


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