Android 图片下载工具类

public class DownGoodsImage {
    private Context context;
    private String filePath;
    private String fileName;
    private Bitmap mBitmap;
    private String mSaveMessage = "失败";
    private final String TAG = "DOWNLOADIMG";
    private ProgressDialog mSaveDialog = null;
    private Handler handler = null;
    String path = Environment.getExternalStorageDirectory().getAbsolutePath();
    //myfile是我们要创建的文件夹的名字，这里的意思就是在这个路径下创建这个文件夹
    File goodsImages = new File(path + "/goodsImages");
    private List list = new ArrayList<>();
    private boolean download = true;

    public  void downGoodsImg(String filePaths,String fileName) {
        filePath = filePaths;
        fileName = fileName;
        try {
            list = FileUtils.getFile(goodsImages);
            if (list != null && list.size() > 0){
                for (int i = 0; i < list.size(); i ++){
                    if ((fileName + ".jpg").equals(list.get(i).getName())) {
                        Log.e("downloadImg", "本地已有此商品图片，无需再次下载");
                        download = false;
                    }
                }
                if (download){
                    if (!TextUtils.isEmpty(filePath)) { //网络图片
                        // 对资源链接
                        URL url = new URL(filePath);
                        //打开输入流
                        InputStream inputStream = url.openStream();
                        //对网上资源进行下载转换位图图片
                        mBitmap = BitmapFactory.decodeStream(inputStream);
                        inputStream.close();
                    }
                    saveFile(mBitmap,fileName);
                    mSaveMessage = "图片保存成功！";
                    Log.i(TAG,"图片保存成功:" + fileName);
                    LogHandler.writeFile("downloadImg","图片保存成功:" + fileName);
                }
            }else {
                if (!TextUtils.isEmpty(filePath)) { //网络图片
                    // 对资源链接
                    URL url = new URL(filePath);
                    //打开输入流
                    InputStream inputStream = url.openStream();
                    //对网上资源进行下载转换位图图片
                    mBitmap = BitmapFactory.decodeStream(inputStream);
                    inputStream.close();
                }
                saveFile(mBitmap,fileName);
                mSaveMessage = "图片保存成功！";
                Log.i(TAG,"图片保存成功:" + fileName);
                LogHandler.writeFile("downloadImg","图片保存成功:" + fileName);
            }
        } catch (IOException e) {
            mSaveMessage = "图片保存失败！";
            e.printStackTrace();
            LogHandler.writeFile("downloadgoodsimage",e.getMessage());
        } catch (Exception e) {
            e.printStackTrace();
            LogHandler.writeFile("downloadgoodsimage",e.getMessage());
        }
    }

    
    public void saveFile(Bitmap bm,String fileName ) throws IOException {
        File dirFile = new File(Environment.getExternalStorageDirectory().getPath());
        if (!dirFile.exists()) {
            boolean b = dirFile.mkdirs();
            Log.i("创建文件夹","成功");
        }
        String name = fileName + ".jpg";
        File myCaptureFile = new File(Environment.getExternalStorageDirectory() + "/goodsImages/" + name);
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
        bm.compress(Bitmap.CompressFormat.JPEG, 80, bos);
        bos.flush();
        bos.close();
    }
}