Exercise : 16

Create an application to read file from asset folder and copy it in memory card.

Screen Shot:

XML :
s1.xml :

JAVA :
SixteenActivity.java :

package kmn.Sixteen;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

public class SixteenActivity extends Activity 
{
	/**  @author Y@@D */

	FileOutputStream fos ;
    
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.s1);           
     
        try 
		{
			String destPath = "/sdcard/kmn.txt";
			File f = new File(destPath);
			if (!f.exists()) 
			{
				CopyDB( getBaseContext().getAssets().open("file.txt"),new FileOutputStream(destPath));
			}
			Intent i = new Intent(SixteenActivity.this,screen1.class);
    		startActivity(i);
		}
		catch (Exception e) 
		{
			Toast.makeText(SixteenActivity.this, " "+e.toString(), Toast.LENGTH_LONG).show();
		}
	}
    public void CopyDB(InputStream inputStream,OutputStream outputStream)throws IOException 
    {
		//---copy 1K bytes at a time---
		byte[] buffer = new byte[1024];
		int length;
		while ((length = inputStream.read(buffer)) > 0) 
		{
			outputStream.write(buffer, 0, length);
		}
		inputStream.close();
		outputStream.close();
    }
}

screen1.java :

package kmn.Sixteen;

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;
import android.widget.Toast;

public class screen1 extends Activity
{
	/**  @author Y@@D */

	public void onCreate(Bundle b)
	{
		super.onCreate(b);
		setContentView(R.layout.s1);		
		try 
		{
			File fileDir = Environment.getExternalStorageDirectory();
        	File directory = new File(fileDir.getAbsolutePath());
        	File file = new File(directory , "kmn.txt");
        	FileInputStream fis = new FileInputStream(file);
			String str = null;
			StringBuffer sbuffer = new StringBuffer();
			DataInputStream dataio = new DataInputStream(fis);
			while((str = dataio.readLine()) != null)
			{
				sbuffer.append(str + "\n");
			}
			TextView txt=(TextView)findViewById(R.id.showTxt);
			txt.setText(sbuffer);
		}
		catch (Exception e) 
		{
			Toast.makeText(this, " "+e.toString(), Toast.LENGTH_LONG).show();
		}
	}
}