图像未显示在图像视图中

Image not showing on image view(图像未显示在图像视图中)

问题描述

我正在尝试在 imageview 上设置图像，但未显示图像.

I am trying to set image on imageview but image is not show.

我正在从 json 数据中读取图像 url，然后尝试在 ImageView 上设置它，但我的图像不可见.没有任何异常发生.
这是我的代码

I am reading image url from json data and then trying to set it on ImageView but my image is not visible. No any exception occur.
Here is my code

HotelList.class

HotelList.class

static final String TAG_DISHIMAGEURL = "dishimageurl";
......
String imageUrl = dishResult.getString(TAG_DISHIMAGEURL);
map.put(TAG_DISHIMAGEURL, imageUrl);
.....
dishimageurl1 = hm.get(TAG_DISHIMAGEURL).toString();
 intent.putExtra("background", dishimageurl1);

HotelDetails.class

HotelDetails.class

......
String dishimageurl = bundle.getString("background");
Bitmap bimage=  getBitmapFromURL(dishimageurl);
    imageView.setImageBitmap(bimage);
....   
public Bitmap getBitmapFromURL(String src) {
try {
    URL url = new URL(src);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoInput(true);
    Toast.makeText(this, "showing image", Toast.LENGTH_LONG).show();
    connection.connect();
    InputStream input = connection.getInputStream();
    Bitmap myBitmap = BitmapFactory.decodeStream(input);
    return myBitmap;
} catch (IOException e) {
    Toast.makeText(this, "showing exception", Toast.LENGTH_LONG).show();
    return null;
}

}

我不明白这段代码会发生什么.没有任何例外，但我的图像不可见.
请给我任何参考.

I don't understand what happen with this code. No any exception but my image is not visible.
Please give me any reference.

推荐答案

请使用以下代码从 url 获取图像并显示到 imageview 中.

Please Use below code for get image from url and display into imageview.

public class image extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Bitmap bitmap = DownloadImage("http://www.gophoto.it/view.php?i=http://1.bp.blogspot.com/-2LTvCCufBKc/T3L3KgcTj2I/AAAAAAAABbQ/Ki60e1LU9sE/s1600/Sachin%2BTendulkar.png");

        RelativeLayout mRlayout1 = (RelativeLayout) findViewById(R.id.mRlayout1);
        Drawable d=new BitmapDrawable(bitmap);
        mRlayoutLogin.setBackgroundDrawable(d);
    }

    private InputStream OpenHttpConnection(String urlString) throws IOException {
        InputStream in = null;
        int response = -1;

        URL url = new URL(urlString);
        URLConnection conn = url.openConnection();

        if (!(conn instanceof HttpURLConnection))
            throw new IOException("Not an HTTP connection");

        try {
            HttpURLConnection httpConn = (HttpURLConnection) conn;
            httpConn.setAllowUserInteraction(false);
            httpConn.setInstanceFollowRedirects(true);
            httpConn.setRequestMethod("GET");
            httpConn.connect();
            response = httpConn.getResponseCode();
            if (response == HttpURLConnection.HTTP_OK) {
                in = httpConn.getInputStream();
            }
        } catch (Exception ex) {
            throw new IOException("Error connecting");
        }
        return in;
    }

    private Bitmap DownloadImage(String URL) {
        Bitmap bitmap = null;
        InputStream in = null;
        try {
            in = OpenHttpConnection(URL);
            bitmap = BitmapFactory.decodeStream(in);
            in.close();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        return bitmap;
    }
}

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