android development tools

following sites usefull for develop Environment :

•      DirectLinks and steps:

       jdk: javadevelopmentkit:

      link :   https://www.dropbox.com/s/ifzbgu2q3iwtupc/jdk-7u45-windows-i586.exe?dl=0

     eclipse development tool (portable):

    links:  https://www.dropbox.com/s/lhwyqx64e7y6b2a/adt-bundle-windows-x86-20130522.rar?dl=0

    software development kit for android sdk:

    https://www.dropbox.com/s/jb7115wgbxxgr1u/SDK%20Manager.exe?dl=0

Android Issues With Solutions

•  Android Studio Error:Execution failed for task ':doctor:dexDebug'.
  > com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_45\bin\java.exe'' finished with non-zero exit value 1

           Answers : 

           Desccription : Android Studio ran out of memory, try increasing the memory size in

           Build.Gradul  File : 

          android {

               //Additionally you may want to add 

                dexOptions {
                     incremental true        

                      javaMaxHeapSize "4g" 

                            } 

             } 

Error inflating class and android.support.v7.widget.CardView

      eclipse


Go to File -> Import -> Existing Android code into workspace --> Browse (Go to sdk/extras/android/support/v7/cardview) --> Click ok --> Click Finish

Your project explorer will now show cardview as a project.

Right click on cardview project --> Properties --> Android(Left Pane) --> Enable isLibrary (tick the checkbox) --> Apply --> ok

Now Right click on your project --> Properties --> Android(Left pane) --> Add (under library) --> cardview --> apply --> ok

Now right click on your project again --> build path --> configure build path --> Under projects tab, add cardview


 android studio

When you want to use support library for Recyclerview or CardView in lower API devices, you not only needs to import the v7 library, but also needs to import Recycler View and Card View support independently.

Like this:

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.+'
    compile 'com.android.support:cardview-v7:21.0.+'
    compile 'com.android.support:recyclerview-v7:21.0.+'
    compile 'com.android.support:support-v4:21.0.0'
} 
This is noted by Google's documents here: https://developer.android.com/training/material/compatibility.html

Android Json Parsing

Android Json Parsing ( JSON Deserializing )

Download the GSON library

GSON Library

Make sure you import this into your Android project as an imported library by going to:

Project > Properties > Java Build Path > Libraries > Add Jars… 

Setup the Deserializer

Lets build our deserializer by using the following code, using the type “Gig” as an example:

Make model first like this

YourModel.class

public class YourModel 

{

@SerializedName("name")
public String name= "name";

}

String YourjsonData = "[Insert JSON data here]";


Gson gson = new Gson();

JSONObject j;
Gig gig = null;

try
{
    j = new JSONObject(jsonData);
    gig = gson.fromJson(YourjsonData.toString(), YourModel.class);}
catch(Exception e)
{
    e.printStackTrace();
}

Get Arralist Example

YourModel.class

public class YourModel 

{

@SerializedName("name")
public String name= "name";

@SerializedName("arrylistmodel")
public ListModel arraylistmodel= new ListModel()  


public class ListModel{

@SerializedName("name")
public String name= "name";


}

}

DES Encrypt And Decrypt Working Copy For BlackBerry

DES SAmple Encrtyp And Decrypt For BlackBerry Working Fine 

import java.io.*;
import net.rim.device.api.crypto.*;
import net.rim.device.api.util.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.util.*;

public class EncodeDecodeString extends UiApplication
{ 

private TripleDESKey _key;

public EncodeDecodeString()
    {
       

    public String encrypt(String plaintext)
    {
        try 
        {
            _key = new TripleDESKey();
            TripleDESEncryptorEngine encryptionEngine = 
                new TripleDESEncryptorEngine(_key);

            // In most cases, the data to encrypt will not fit into the block
            // length of a cipher. When that happens, use a padding algorithm
            // to pad out the last block. This uses PKCS5 to do the padding.
            PKCS5FormatterEngine formatterEngine = new PKCS5FormatterEngine( 
                  encryptionEngine );

            // Use the byte array output stream to catch the encrypted information.
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

            // Create a block encryptor to help use the triple DES engine.
            BlockEncryptor encryptor = new BlockEncryptor( formatterEngine, 
                  outputStream );

            // Encrypt the data.
            encryptor.write( plaintext.getBytes() );

            // Close the stream. This forces the extra bytes to be padded out if 
            // there were not enough bytes to fill all of the blocks.
            encryptor.close();

            // Get the encrypted data.
            byte[] encryptedData = outputStream.toByteArray();
            String strEncrypted = new String(encryptedData);
            return(strEncrypted);

        } 
        catch( CryptoTokenException e ) 
        {
            System.out.println(e.toString());
        } 
        catch (CryptoUnsupportedOperationException e) 
        {
            System.out.println(e.toString());
        } 
        catch( IOException e ) 
        {
            System.out.println(e.toString());
        }
        return "error";
    }
        
    public String decrypt(String ciphertext)
    {
            try
            {
            // Perform the decryption. Since this is a symmetric algorithm, 
            // use the same key as before.
            TripleDESDecryptorEngine decryptorEngine = 
                    new TripleDESDecryptorEngine(_key);

            // Create the unformatter engine to remove padding bytes.
            PKCS5UnformatterEngine unformatterEngine = 
                    new PKCS5UnformatterEngine( decryptorEngine );

            // Set up an input stream to hand the encrypted data to the 
            // block decryptor.
            ByteArrayInputStream inputStream = 
                    new ByteArrayInputStream( ciphertext.getBytes() );

            // Create the block decryptor passing in the unformatter engine and the 
            // encrypted data.
            BlockDecryptor decryptor = 
                    new BlockDecryptor( unformatterEngine, inputStream );

            // Next, read from the stream. This example reads the data 10 bytes 
            // at a time and then adds that new data to the decryptedData array. 
            // For efficiency in a real situation, you should use a value
            // larger than 10. This example uses a small value to demonstrate 
            // several iterations through the loop.
            byte[] temp = new byte[10];
            DataBuffer db = new DataBuffer();
            
            for( ;; ) 
            {
                int bytesRead = decryptor.read( temp );
                if( bytesRead <= 0 )
                {
                    // No more information to read, so leave loop.
                    break;
                }
                db.write(temp, 0, bytesRead);
            }

            // Make sure that the decrypted data is the same as the data  
            // that was passed into the encryptor.
            byte[] decryptedData = db.toArray();
            String strDecrypted = new String(decryptedData);
            return(strDecrypted);         
        } 
        catch( CryptoTokenException e ) 
        {
            System.out.println(e.toString());
        } 
        catch (CryptoUnsupportedOperationException e) 
        {
            System.out.println(e.toString());
        } 
        catch( IOException e ) 
        {
            System.out.println(e.toString());
        }
        return "error";
   }
}

DES Workking Copy For Blackberry

DES SAmple Encrtyp And Decrypt For BlackBerry Workking Fine 

import java.io.*;
import net.rim.device.api.crypto.*;
import net.rim.device.api.util.*;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.util.*;

public class EncodeDecodeString extends UiApplication
{ 

private TripleDESKey _key;

public EncodeDecodeString()
    {
       

    public String encrypt(String plaintext)
    {
        try 
        {
            _key = new TripleDESKey();
            TripleDESEncryptorEngine encryptionEngine = 
                new TripleDESEncryptorEngine(_key);

            // In most cases, the data to encrypt will not fit into the block
            // length of a cipher. When that happens, use a padding algorithm
            // to pad out the last block. This uses PKCS5 to do the padding.
            PKCS5FormatterEngine formatterEngine = new PKCS5FormatterEngine( 
                  encryptionEngine );

            // Use the byte array output stream to catch the encrypted information.
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

            // Create a block encryptor to help use the triple DES engine.
            BlockEncryptor encryptor = new BlockEncryptor( formatterEngine, 
                  outputStream );

            // Encrypt the data.
            encryptor.write( plaintext.getBytes() );

            // Close the stream. This forces the extra bytes to be padded out if 
            // there were not enough bytes to fill all of the blocks.
            encryptor.close();

            // Get the encrypted data.
            byte[] encryptedData = outputStream.toByteArray();
            String strEncrypted = new String(encryptedData);
            return(strEncrypted);

        } 
        catch( CryptoTokenException e ) 
        {
            System.out.println(e.toString());
        } 
        catch (CryptoUnsupportedOperationException e) 
        {
            System.out.println(e.toString());
        } 
        catch( IOException e ) 
        {
            System.out.println(e.toString());
        }
        return "error";
    }
        
    public String decrypt(String ciphertext)
    {
            try
            {
            // Perform the decryption. Since this is a symmetric algorithm, 
            // use the same key as before.
            TripleDESDecryptorEngine decryptorEngine = 
                    new TripleDESDecryptorEngine(_key);

            // Create the unformatter engine to remove padding bytes.
            PKCS5UnformatterEngine unformatterEngine = 
                    new PKCS5UnformatterEngine( decryptorEngine );

            // Set up an input stream to hand the encrypted data to the 
            // block decryptor.
            ByteArrayInputStream inputStream = 
                    new ByteArrayInputStream( ciphertext.getBytes() );

            // Create the block decryptor passing in the unformatter engine and the 
            // encrypted data.
            BlockDecryptor decryptor = 
                    new BlockDecryptor( unformatterEngine, inputStream );

            // Next, read from the stream. This example reads the data 10 bytes 
            // at a time and then adds that new data to the decryptedData array. 
            // For efficiency in a real situation, you should use a value
            // larger than 10. This example uses a small value to demonstrate 
            // several iterations through the loop.
            byte[] temp = new byte[10];
            DataBuffer db = new DataBuffer();
            
            for( ;; ) 
            {
                int bytesRead = decryptor.read( temp );
                if( bytesRead <= 0 )
                {
                    // No more information to read, so leave loop.
                    break;
                }
                db.write(temp, 0, bytesRead);
            }

            // Make sure that the decrypted data is the same as the data  
            // that was passed into the encryptor.
            byte[] decryptedData = db.toArray();
            String strDecrypted = new String(decryptedData);
            return(strDecrypted);         
        } 
        catch( CryptoTokenException e ) 
        {
            System.out.println(e.toString());
        } 
        catch (CryptoUnsupportedOperationException e) 
        {
            System.out.println(e.toString());
        } 
        catch( IOException e ) 
        {
            System.out.println(e.toString());
        }
        return "error";
   }
}