如何下载图像并将其保存在Android图库

问题描述：

我得到的图像链接从服务器和它应该下载并保存到库中的链接点击，我对如何做到这一点毫无头绪。请帮助我在此，先谢谢了。

I get image link from the server and on click of the link it should download and save it to the gallery, I have no clue on how to do it. please help me on this, thanks in advance

答

试试这个code，呼叫 mDownloadAndSave（）为节省SD卡图像的方法，它会解决你的问题。

Try this code, Call mDownloadAndSave() method for save image on SDCard, it will solve your problem.

public void mDownloadAndSave() {
    // Setting up file to write the image to.
    File f = new File("/mnt/sdcard/img.png");

    // Open InputStream to download the image.
    InputStream is;
    try {
        is = new URL("http://www.tmonews.com/wp-content/uploads/2012/10/androidfigure.jpg").openStream();

        // Set up OutputStream to write data into image file.
        OutputStream os = new FileOutputStream(f);

        CopyStream(is, os);
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

public static void CopyStream(InputStream is, OutputStream os) {
    final int buffer_size = 1024;
    try {
        byte[] bytes = new byte[buffer_size];
        for (;;) {
            int count = is.read(bytes, 0, buffer_size);
            if (count == -1)
            break;
            os.write(bytes, 0, count);
        }
    } catch (Exception ex) {

    }
}

和不要忘了下面的权限加入到AndroidManifest.xml中

And Don't forget to add below permission into Androidmanifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

如何下载图像并将其保存在Android图库

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