我如何保存从URL的形象？ [英] How can I save an image from a url?

问题描述

我设置使用 setImageBitmap 与外部图像的URL的ImageView的。我想保存图像，这样就可以在以后即使没有互联网连接使用。在哪里以及如何保存呢？

I'm setting an ImageView using setImageBitmap with an external image url. I would like to save the image so it can be used later on even if there is no internet connection. Where and how can I save it?

推荐答案

您必须将它保存在SD卡或你的包数据，因为在运行时，你只能访问这些。要做到这一点，这是一个很好的例子。

You have to save it in SD card or in your package data, because on runtime you only have access to these. To do that this is a good example

URL url = new URL ("file://some/path/anImage.png");
InputStream input = url.openStream();
try {
//The sdcard directory e.g. '/sdcard' can be used directly, or 
//more safely abstracted with getExternalStorageDirectory()
File storagePath = Environment.getExternalStorageDirectory();
OutputStream output = new FileOutputStream (storagePath + "/myImage.png");
try {
    byte[] buffer = new byte[aReasonableSize];
    int bytesRead = 0;
    while ((bytesRead = input.read(buffer, 0, buffer.length)) >= 0) {
        output.write(buffer, 0, bytesRead);
    }
} finally {
    output.close();
}
} finally {
input.close();
}

来源：<一个href=\"http://stackoverflow.com/questions/3296850/android-how-to-store-images-from-url-save-it-in-sd-card\">How我从它的URL传送一个图像到SD卡？

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