android - 将多张图片保存到 SD 卡

Question

我的项目有 30 张可绘制图像，我想通过单击按钮将所有这些图像保存/复制到 SD 卡。我正在使用下面的代码将图像保存到 SD 卡，但我不想复制粘贴此代码 30 次以保存所有图像。那么对于这个问题有没有更好的解决办法。谢谢

        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.aurora);
        String fileName = "aurora.png";

        File sd = Environment.getExternalStorageDirectory();
        File folder = new File(sd + "/Wallpaper Pack");
        folder.mkdir();

        File dest = new File(folder, fileName);
        try {
            FileOutputStream out;
            out = new FileOutputStream(dest);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Answer 1

很简单，创建一个数组并循环它。

int[] drawablesArr = {R.id.name1, R.id.name2, ....}

for(int i=0l i<=drawablesArr.length; i++){
     Bitmap bitmap = BitmapFactory.decodeResource(getResources(), drawablesArr[i]);
        String fileName = "image_"+ String.valueOf(i)+".png" ;

        File sd = Environment.getExternalStorageDirectory();
        File folder = new File(sd + "/Wallpaper Pack");
        folder.mkdir();

        File dest = new File(folder, fileName);
        try {
            FileOutputStream out;
            out = new FileOutputStream(dest);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
}