Question

我可以使用xml解析将选定的列表视图文本发送到另一个活动，但是无法将所选图像提取到下一个活动，这里我放置了我的代码，请找出我没有将图像转换为其他活动的原因： -

MainActivity Code： -

list.setOnItemClickListener(new OnItemClickListener() {

                    public void onItemClick(AdapterView<?> parent, View view,

                            int position, long id) {

                          HashMap<String, String> map = pizzaList.get(position);

               Intent in = new Intent(MainActivity.this, SecondActivity.class);

                     in.putExtra(KEY_TITLE, map.get(KEY_TITLE));

                       in.putExtra(KEY_DESCRIPTION, map.get(KEY_DESCRIPTION));    

                        in.putExtra(KEY_THUMB_URL, map.get(KEY_THUMB_URL));

                       in.putExtra(KEY_COST, map.get(KEY_COST));
                        startActivity(in);
                    }

                });

SecondActivity Code： -

Intent in = getIntent();



   final String title = in.getStringExtra(KEY_TITLE);

   final String description = in.getStringExtra(KEY_DESCRIPTION);

   final String thumb_url = in.getStringExtra(KEY_THUMBURL);

   final String cost = in.getStringExtra(KEY_COST);



   TextView title = (TextView) findViewById(R.id.single_title);

   TextView description = (TextView) findViewById(R.id.single_description);

  TextView cost = (TextView) findViewById(R.id.single_cost);

   ImageLoader imageLoader = new ImageLoader(getApplicationContext());
   ImageView thumb = (ImageView) findViewById(R.id.single_image);

title.setText(title);
description.setText(description);
cost.setText(cost);
imageLoader.DisplayImage(thumb_url, thumb);

Answer 1

final String title = in.getStringExtra(KEY_TITLE);
final String description = in.getStringExtra(KEY_DESCRIPTION);
final String thumb_url = in.getStringExtra(KEY_THUMBURL);
log.i("log_tag","Image URl:"+thumb_url);
final String cost = in.getStringExtra(KEY_COST);



 TextView title = (TextView) findViewById(R.id.single_title);

 TextView description = (TextView) findViewById(R.id.single_description);

 TextView cost = (TextView) findViewById(R.id.single_cost);


 ImageView thumb = (ImageView) findViewById(R.id.single_image);

 title.setText(title);
description.setText(description);
 cost.setText(cost);
 Drawable d = LoadImageFromWebOperations(ImageUrl);
  imageView.setImageDrawable(d);   




     public static Drawable LoadImageFromWebOperations(String url) {
    try {
        InputStream is = (InputStream) new URL(url).getContent();
        Drawable d = Drawable.createFromStream(is, "src name");
        return d;
    } catch (Exception e) {
        return null;
    }
}

Answer 2

我认为您的KEY_THUMB_URL是您的网址，只需在您的第二个活动中调用此方法，这将返回一个位图，然后此位图将您设置为图像视图

 public static Bitmap loadBitmap(String imgPath) {

        String imgUrlStr = imgPath ;

    Bitmap bitmap = null;
    try {   
        bitmap = BitmapFactory.decodeStream((InputStream)new URL(imgUrlStr).getContent()); 
        }
    catch (MalformedURLException e) { 
        e.printStackTrace();
        } 
    catch (IOException e) { 
        e.printStackTrace();
        } 
    return bitmap;
}

Answer 3

我找到了为什么我没有将图像带入下一个活动的原因。我做了一个非常小的错误，见下面的行，我之前使用过：

 final String thumb_url = in.getStringExtra(KEY_THUMBURL);

现在我尝试过：

final String imageUri = in.getStringExtra(KEY_THUMBURL);

因为我正在使用这个变量：

static final String KEY_THUMBURL = "imageUri";

将所选列表视图行图像显示给下一个活动

3 个答案: