我如何将图像下载到设备上以便能够将它们设置为墙纸

Question

有没有一种方法可以让我在 android 上下载图像并在下载图像后通过点击按钮将其设置为新墙纸并在设备上找到它们。

不胜感激！

Answer 1

ImageRequest imgRequest = new ImageRequest(url, new Response.Listener<Bitmap>() {
    @Override
    public void onResponse(Bitmap _bitmapScaled) {

        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        _bitmapScaled.compress(Bitmap.CompressFormat.JPEG, 40, bytes);

        //you can create a new file name "test.jpg" in sdcard folder.
        File f = new File(Environment.getExternalStorageDirectory()
                                + File.separator + "test.jpg")
        f.createNewFile();
        //write the bytes in file
        FileOutputStream fo = new FileOutputStream(f);
        fo.write(bytes.toByteArray());

        // remember close de FileOutput
        fo.close();


    }
    }, 0, 0, ImageView.ScaleType.CENTER_CROP, Bitmap.Config.ARGB_8888, 
    new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
       //do stuff
    }
});

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