Android保存图片到本地

保存到本地的方法：

    private boolean saveImage(byte[] data){
        if(TextUtils.isEmpty(mUrl) || data == null)
            return false;
        boolean save = false;
        String path = DIR_IMAGE + mUrl.hashCode();
        FileOutputStream fos = null;
        try {
            File imageDir = new File(DIR_IMAGE);
            if (!imageDir.exists()) {
                imageDir.mkdirs();
            }
            fos = new FileOutputStream(path);
            fos.write(data);
            save = true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return save;
    }

    private boolean saveImage1(Bitmap bitmap){
        if(TextUtils.isEmpty(mUrl) || bitmap == null)
            return false;
        boolean save = false;
        String path = DIR_IMAGE + mUrl.hashCode();
        FileOutputStream fos = null;
        try {
            File imageDir = new File(DIR_IMAGE);
            if (!imageDir.exists()) {
                imageDir.mkdirs();
            }
            fos = new FileOutputStream(path);
            bitmap.compress(Bitmap.CompressFormat.PNG,100,fos);
            save = true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.flush();
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return save;
    }

将Bitmap装成byte[]

    public byte[] compressBitmap(Bitmap bitmap) {
        if (bitmap == null) {
            return null;
        }
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(CompressFormat.PNG, 100, stream);
        return stream.toByteArray();
    }