android browser中长按图片事件

来源：互联网发布：数据分析的重要性编辑：程序博客网时间：2024/05/02 01:30

1. 长按事件

    public boolean onLongClick(View v) {
       final HitTestResult htr = webview.getHitTestResult();

       if (htr.getType() == WebView.HitTestResult.IMAGE_TYPE) {
           new AlertDialog.Builder(this)
                   .setTitle(htr.getExtra())
                   .setItems(R.array.image_long_click_event,
                           new DialogInterface.OnClickListener() {

                               public void onClick(DialogInterface dialog,
                                       int which) {
                                   if (which == 0) {
                                       // view image
                                       webview.loadUrl(htr.getExtra());
                                   } else if (which == 1) {
                                       // save image
                                       downloadImage(htr.getExtra());
                                   } else if (which == 2) {
                                       // set wallpaper
                                       setWallpaper(htr.getExtra());
                                   }

                               }
                           }).show();
       }
       return false;
   }

其中

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="image_long_click_event">
        <item>View Image</item>
        <item> Save Image</item>
        <item>Save as Wallpaper</item>
    </string-array>
</resources>

    protected void downloadImage(String extra) {
       DownloadManager downloadManager = ((DownloadManager) getSystemService(Activity.DOWNLOAD_SERVICE));
       Request request = new Request(Uri.parse(extra));
       request.setShowRunningNotification(true);
       request.setVisibleInDownloadsUi(true);
       request.setDescription(extra);
       request.setDestinationInExternalPublicDir(
               Environment.DIRECTORY_DOWNLOADS, "allenSample.png");
       downloadManager.enqueue(request);
   }

    protected void setWallpaper(String extra) {
       try {
           Bitmap bitmap = loadImageFromUrl(extra);
           setWallpaper(bitmap);
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

    public static Bitmap loadImageFromUrl(String url) {
       InputStream inputStream;
       Bitmap b;
       try {
           inputStream = (InputStream) new URL(url).getContent();
           BitmapFactory.Options bpo = new BitmapFactory.Options();
           bpo.inSampleSize = 2;
           b = BitmapFactory.decodeStream(inputStream, null, bpo);
           return b;
       } catch (IOException e) {
           throw new RuntimeException(e);
       }
   }