android vm problem

package net.example.cam;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.widget.SimpleCursorAdapter;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("SimpleDateFormat")
public class AddImages extends Activity {

    private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
    private Uri fileUri;
    public static final int MEDIA_TYPE_IMAGE = 1;
    final DBAdapter db = new DBAdapter(this);
    String fileName;

    File SDCardRoot = Environment.getExternalStorageDirectory();
    File dir = new File(SDCardRoot+"/myApp/");

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    public void onResume() {
        super.onResume();
        setContentView(R.layout.add_image);

        Log.v("onResume", "started back on resume");

        db.open();

        Bundle postVals = getIntent().getExtras();
        String tid = postVals.getString("tid");

        final Cursor c = db.getTicketImages(tid);

        if(c.getCount() > 0) {

            String[] cols = new String[] {DBAdapter.KEY_FILENAME,DBAdapter.KEY_TRANSACTION_DATETIME};

            int[] values = new int[] {R.id.thumbnail,R.id.datetime_stamp};

            SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this, R.layout.image_listview, c, cols, values, 0);

            ListView listView = (ListView) findViewById(android.R.id.list);
            listView.setAdapter(cursorAdapter);
            listView.setOnItemClickListener(new OnItemClickListener() {
                // OnClick Listener for ListView
                @Override
                public void onItemClick(AdapterView<?> listView, View view, int position, long id) {
                    String row = c.getString(c.getColumnIndexOrThrow(DBAdapter.KEY_ID)); // row ID from transactions
                    Toast.makeText(getBaseContext(), row, Toast.LENGTH_SHORT).show();
                }
            });
        } else {

            // Display Camera image

        }

        Button add_images = (Button)findViewById(R.id.add_more_images);
        add_images.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String time_stamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()); // For image name
                db.open();

                Cursor c = db.getUIDCID();
                String uid = null;
                String cid = null;

                if(c.moveToFirst()) {
                    uid = c.getString(c.getColumnIndex(DBAdapter.KEY_UID));
                    cid = c.getString(c.getColumnIndex(DBAdapter.KEY_CID));
                }

                fileName = cid + uid + time_stamp + ".jpg";

                db.close();

                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
                intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
                startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

            }
        });
    }

    private Uri getOutputMediaFileUri(int type) {
          return Uri.fromFile(getOutputMediaFile(type));
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {

            File file=new File(Environment.getExternalStorageDirectory(), "/myApp/"+fileName);

                 long file_size = file.length();
                 file_size = file_size/1024;

            String fileSize = Long.valueOf(file_size).toString();

            Bundle postVals = getIntent().getExtras();
            String tid = postVals.getString("tid");
            String now = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());

            db.open();

            Cursor c = db.getUIDCID();
            String uid = null;
            String cid = null;

            if(c.moveToFirst()) {
                uid = c.getString(c.getColumnIndex(DBAdapter.KEY_UID));
                cid = c.getString(c.getColumnIndex(DBAdapter.KEY_CID));
            }

            db.insertTicketTransaction(tid, cid, uid, "3", "I01", now, fileName, fileSize, "0");

            db.close();



            try {
                Bitmap bitmap = null;
                try {
                    bitmap = BitmapFactory.decodeStream(new FileInputStream(file));
                } catch (FileNotFoundException e1) {
                    e1.printStackTrace();
                }

                FileOutputStream outputStream = new FileOutputStream(dir + "/thumb_" + fileName);
                bitmap.compress(CompressFormat.JPEG, 2, outputStream);

                outputStream.flush();
                outputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            Log.v("Image Result", "No image taken");
        }
    }


    private File getOutputMediaFile(int type){

        // Create the directory if it does not exist
        if (!dir.exists()){
            if (!dir.mkdirs()){
                // Error catching
                Log.d("dir create", "failed to create directory");
                return null;
            }
        }

        File photo;

        if (type == MEDIA_TYPE_IMAGE){
            photo = new File(dir.getPath() + File.separator + fileName);
        } else {
            return null;
        }

        return photo;
    }
}