java - 有什么办法可以从多个网址获取多张图片吗？

Question

图像来自不同的 URL，我想在 ListView 中显示所有图像。每个 URL 代表一个图像，我如何使用每个图像都有唯一 ID 的图像 URL 显示所有图像？。

"http://www.samplesite.com/Customer/File/DownloadResource/ "imageID"?token="+m_token;

08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err: java.io.FileNotFoundException: http://samplesite.com/Customer/File/DownloadResource/220?token=aGkvWUlQSW9EeVZmU3pQOFF6WWo5OU4raGdzVjBrSngzWEQvbkNueWxYdz06dGVzdDFAYXBpLmNvbTo2MzYwNjg0OTU0MDgyMDAwMDA6Qw==
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at com.app.tysomcustomer.dashboard.LoyaltyFragment$ConvertImageUrlTask.doInBackground(LoyaltyFragment.java:320)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at com.app.tysomcustomer.dashboard.LoyaltyFragment$ConvertImageUrlTask.doInBackground(LoyaltyFragment.java:277)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
08-15 17:19:01.301 25505-25959/com.app.projectactivity W/System.err:     at java.lang.Thread.run(Thread.java:818)

Answer 1

使用 HttpURLConnection 从 URL 获取输入流。然后使用 BitmapFactory 将此流解码为位图。请记住不要在主线程中运行此代码。否则它将阻止任何内容，直到图像被下载和解码。

try {
    URL url = new URL("http://www.samplesite.com/Customer/File/DownloadResource/" + imageID + "?token="+ m_token);
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

    Bitmap mBitmap = BitmapFactory.decodeStream(urlConnection.getInputStream());
    urlConnection.disconnect();

} catch (IOException e) {
    e.printStackTrace();
}