Android:动态设置ImageView？

Question

我正在尝试下载图像，动态创建 ImageView 并将其添加到我的布局中，但它不会显示图像。这是我的代码:

ImageView image = new ImageView(this);
LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
image.setLayoutParams(vp);
image.setScaleType(ImageView.ScaleType.CENTER_CROP);
image.setMaxHeight(50);
image.setMaxWidth(50);
image.setImageDrawable(avatar);
theLayout.addView(image);

也许我需要在添加 ImageView 后刷新布局？你如何“刷新”？

Answer 1

试试下面的代码，你就不需要刷新了。将您的图片网址放入 inputurl 变量。

InputStream is = null;
String inputurl = " Enter url of ur image ";
try {
        URL url = new URL(inputurl);
        Object content = url.getContent();
        is = (InputStream) content;
        avatar = Drawable.createFromStream(is,"src");
} catch (MalformedURLException e) {
        e.printStackTrace();
} catch (IOException e) {
        e.printStackTrace();
}

ImageView image = new ImageView(this);
LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
image.setLayoutParams(vp);
image.setScaleType(ImageView.ScaleType.CENTER_CROP);
image.setMaxHeight(50);
image.setMaxWidth(50);
image.setImageDrawable(avatar);
theLayout.addView(image);