[android007] SD카드 예제

import java.io.*;
import android.app.*;
import android.os.*;
import android.widget.*;

public class ExternalStorageTest extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        TextView textView = new TextView(this);
        setContentView(textView);
       
        String state = Environment.getExternalStorageState();
        if(!state.equals(Environment.MEDIA_MOUNTED))
        {
            textView.setText("There is no SD card.");
        }
        else
        {
            File externalDir = Environment.getExternalStorageDirectory();
            File textFile = new File(externalDir.getAbsolutePath() + File.separator + "text.txt");
            try
            {
                writeTextFile(textFile, "This is a test. Roger");
                String text = readTextFile(textFile);
                textView.setText(text);
                if(!textFile.delete())
                {
                    textView.setText("Couldn't remove temporary file");
                }
               
            }
            catch(IOException e)
            {
                textView.setText("something went wrong! " + e.getMessage());
            }
        }
    }

    private String readTextFile(File file) throws IOException
    {
        BufferedReader reader = new BufferedReader(new FileReader(file));
        StringBuilder text = new StringBuilder();
        String line;
        while((line = reader.readLine()) != null)
        {
            text.append(line);
            text.append("\n");
        }
        reader.close();
        return text.toString();
    }

    private void writeTextFile(File file, String text) throws IOException
    {
        BufferedWriter writer = new BufferedWriter(new FileWriter(file));
        writer.write(text);
        writer.close();
    }
}