如何从 url 为 imageView 设置图像 [英] how to set image from url for imageView

问题描述

我想在 ImageView 中使用 Url 设置图像，例如我有这个 url

I wanna set Image in ImageView using Url for example I have this url

http://www.google.iq/imgres?hl=en&biw=1366&bih=667&tbm=isch&tbnid=HjzjsaANDXVR9M:&imgrefurl=http:///www.vectortemplates.com/raster-batman.php&docid=FxbVmggVf--0dM&imgurl=http://www.vectortemplates.com/raster/batman-logo-big.gif&w=2072&h=1225&ei=Zeo_UoSWIMaR0AXl_YHIBg&zoom=1

但是没有设置url的选项

but there is no option to set url

推荐答案

创建一个扩展 AsyncTask

public class ImageLoadTask extends AsyncTask<Void, Void, Bitmap> {

    private String url;
    private ImageView imageView;

    public ImageLoadTask(String url, ImageView imageView) {
        this.url = url;
        this.imageView = imageView;
    }

    @Override
    protected Bitmap doInBackground(Void... params) {
        try {
            URL urlConnection = new URL(url);
            HttpURLConnection connection = (HttpURLConnection) urlConnection
                    .openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            Bitmap myBitmap = BitmapFactory.decodeStream(input);
            return myBitmap;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Bitmap result) {
        super.onPostExecute(result);
        imageView.setImageBitmap(result);
    }

}

并像这样调用它 new ImageLoadTask(url, imageView).execute();

直接方法:

使用此方法并将您的网址作为字符串传递.它返回一个位图.将位图设置为您的 ImageView.

Use this method and pass your url as string. It returns a bitmap. Set the bitmap to your ImageView.

public static Bitmap getBitmapFromURL(String src) {
    try {
        Log.e("src",src);
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        Log.e("Bitmap","returned");
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        Log.e("Exception",e.getMessage());
        return null;
    }
}

然后这样到 ImageView:

And then this to ImageView like so:

imageView.setImageBitmap(getBitmapFromURL(url));

不要忘记 maifest 中的这个权限.

And dont forget about this permission in maifest.

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

注意:

尝试从另一个线程或 AsyncTask 调用此方法，因为我们正在执行网络操作.

Try to call this method from another thread or AsyncTask because we are performing networking operations.

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