[Andoidアプリ開発]Main外のクラスでCanvasに描画したものを端末のフォルダ内に保存をしたい。

Mainのクラス外で複数の画像をCanvasにつなげて描画し、それを端末内に保存するプログラムを書いているのですが、画像を保存するところで  ContentResolverを使用しないと端末を再起動しなければギャラリーに表示がされません。
ですが、このプログラムを書いているクラスにはContextを渡していません。その為か、getContentResolver();でエラーが出てしまいます。
なるべくContextを渡さないで解決したいのですがいい方法は無いでしょうか？

package com.example.admin.saveimage1;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Environment;
import android.provider.MediaStore;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Created by admin on 2017/01/23.
 */
public class saveimage {

        MainActivity ma = new MainActivity();


        Resources r;
        Bitmap pic1;
        Bitmap pic2;
        Bitmap pic3;
        Bitmap pic4;
        Bitmap pic5;
        Bitmap pic6;
        Bitmap pic7;
        Bitmap pic8;
        Bitmap pic9;
//        Bitmap bitmap = BitmapFactory.decodeResource(ma.getresource(), R.drawable.source);
//        int width = bitmap.getWidth(); // 元ファイルの幅取得
//        int height = bitmap.getHeight(); // 元ファイルの高さ取得
//        Bitmap bitmap1 = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
//        Canvas canvas = new Canvas(bitmap1);
//

//        private Paint paint = new Paint();
        Paint paint = new Paint();
        String path = Environment.getExternalStorageDirectory().getPath();
        File dir = new File(path + "/MyPhoto/");
        File file1 = new File(dir.getAbsolutePath() + "/15_29066_12908.jpg");
        File file2 = new File(dir.getAbsolutePath() + "/15_29066_12909.jpg");
        File file3 = new File(dir.getAbsolutePath() + "/15_29067_12908.jpg");
        File file4 = new File(dir.getAbsolutePath() + "/15_29067_12909.jpg");
        File file5 = new File(dir.getAbsolutePath() + "/15_29068_12908.jpg");
        File file6 = new File(dir.getAbsolutePath() + "/15_29068_12909.jpg");
        File file7 = new File(dir.getAbsolutePath() + "/15_29066_12910.jpg");
        File file8 = new File(dir.getAbsolutePath() + "/15_29067_12910.jpg");
        File file9 = new File(dir.getAbsolutePath() + "/15_29068_12910.jpg");



    public void savemap(Context context,Resources resource) {

        Bitmap bitmap = BitmapFactory.decodeResource(resource, R.drawable.source);
        int width = bitmap.getWidth(); // 元ファイルの幅取得
        int height = bitmap.getHeight(); // 元ファイルの高さ取得
        Bitmap bitmap1 = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap1);


        // TODO Auto-generated constructor stub
        try {
            InputStream is = new FileInputStream(file1);
            pic1 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file2);
            pic2 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file3);
            pic3 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file4);
            pic4 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file5);
            pic5 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file6);
            pic6 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file7);
            pic7 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file8);
            pic8 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        try {
            InputStream is = new FileInputStream(file9);
            pic9 = BitmapFactory.decodeStream(is);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }


        canvas.scale(3, 3);
        canvas.drawBitmap(pic1, 0, 0, paint);
        canvas.drawBitmap(pic2, 0, pic1.getWidth(), paint);
        canvas.drawBitmap(pic3, pic1.getWidth(), 0, paint);
        canvas.drawBitmap(pic4, pic1.getWidth(), pic1.getWidth(), paint);
        canvas.drawBitmap(pic5, pic1.getWidth() * 2, 0, paint);
        canvas.drawBitmap(pic6, pic1.getWidth() * 2, pic1.getWidth(), paint);
        canvas.drawBitmap(pic7, 0, pic1.getWidth() * 2, paint);
        canvas.drawBitmap(pic8, pic1.getWidth(), pic1.getWidth() * 2, paint);
        canvas.drawBitmap(pic9, pic1.getWidth() * 2, pic1.getWidth() * 2, paint);


        try {
            saveBitmap(bitmap1);
        } catch (Exception e) {
            e.printStackTrace();
        }


    }




    public void saveBitmap(Bitmap saveImage) throws IOException {

        final String SAVE_DIR = "/MyPhoto";
        File file = new File(Environment.getExternalStorageDirectory().getPath() + SAVE_DIR);

        String fileName = "aaaa" + ".jpg";
        String AttachName = file.getAbsolutePath() + "/" + fileName;

        try {
            FileOutputStream out = new FileOutputStream(AttachName);
            saveImage.compress(Bitmap.CompressFormat.JPEG, 30, out);
            out.flush();
            out.close();
        } catch(IOException e) {
            e.printStackTrace();
            throw e;
        }

        // save index
        ContentValues values = new ContentValues();
        ContentResolver contentResolver = getContentResolver();
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
        values.put(MediaStore.Images.Media.TITLE, fileName);
        values.put("_data", AttachName);
        contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);



    }



}