Question

我一直在尝试在stackoverflow上发布的许多代码。但到目前为止，没有一个对我有用。我是android的新手，可能有些东西我忽略了。请帮助修复此代码 -

package com.alphageeks.pespitstop;

import java.io.InputStream;
import java.net.URL;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class Vop extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_vop);

    Button bnot = (Button) findViewById(R.id.bnot);
    Button bcant = (Button) findViewById(R.id.bcant);
    Button bcal = (Button) findViewById(R.id.bcal);
    final ImageView img = (ImageView) findViewById(R.id.imageView1);
    final Toast disp = null;

    bnot.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            try {
                URL url = new URL("https://drive.google.com/file/d/0B-bEff6i-vWoUHpWS3h1VUR4ZkE/edit?usp=sharing");
                //try this url = "http://0.tqn.com/d/webclipart/1/0/5/l/4/floral-icon-5.jpg"
                HttpGet httpRequest = null;

                httpRequest = new HttpGet(url.toURI());

                HttpClient httpclient = new DefaultHttpClient();
                HttpResponse response = (HttpResponse) httpclient
                        .execute(httpRequest);

                HttpEntity entity = response.getEntity();
                BufferedHttpEntity b_entity = new BufferedHttpEntity(entity);
                InputStream input = b_entity.getContent();

                Bitmap bitmap = BitmapFactory.decodeStream(input);

                img.setImageBitmap(bitmap);

            } catch (Exception ex) {
                    disp.makeText(Vop.this, "error",Toast.LENGTH_SHORT).show();
            }


        }
    });




}

}

Answer 1

两件事：

1）您想要的网址实际上是：

https://lh3.googleusercontent.com/pgF2BkPGEdp5KuKD535q0DNL-SkXqiaPGmeQt-F0wA-GZ3GLIu2WaOGI72i0TzlxI-Uub4FoFtY

2）您需要在后台Thread下载图像，就像AsyncTask一样，否则您将抛出NetworkOnMainThreadException。< / p>

private class ImageWorker extends AsyncTask<String, Void, Bitmap> {

    /**
     * {@inheritDoc}
     */
    @Override
    protected Bitmap doInBackground(String... params) {
        InputStream input = null;
        try {
            final URL url = new URL(YOUR_URL);
            input = new BufferedInputStream(url.openStream());
            return BitmapFactory.decodeStream(input);
        } catch (final Exception e) {
            e.printStackTrace();
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (final IOException ignored) {
                    // Nothing to do
                }
            }
        }
        return null;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onPostExecute(Bitmap result) {
        if (result != null) {
            // Set the image here
        }
    }
}

Answer 2

试试这个（如果你没有得到任何例外，这是以防万一，否则你可能在UI线程上做网络并导致错误，那么你可能会忽略我的回复）：

HttpClient httpclient = new DefaultHttpClient();
                HttpResponse response = (HttpResponse) httpclient
                        .execute(httpRequest);


ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.getEntity().writeTo(out);
                out.close();

                byte[] bytes = out.toByteArray();       

Bitmap bmp=BitmapFactory.decodeByteArray(bytes,0,bytes.length);

            img.setImageBitmap(bmp);

Answer 3

也许你可以看看这个教程。我希望它可以解决你的问题。

https://sites.google.com/site/androidhowto/diplayinganimage

或者这个网站上有关于如何从URL显示图像的更详细的教程。不要忘记在清单中包含权限。

http://www.androidhive.info/2012/07/android-loading-image-from-url-http/

Answer 4

使用picasso http://square.github.io/picasso/很简单，代码示例Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

Answer 5

试试这个：

try {
    URL url = new URL("https://drive.google.com/file/d/0B-bEff6i-vWoUHpWS3h1VUR4ZkE/edit?usp=sharing");
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoInput(true);
    connection.connect();
    InputStream input = connection.getInputStream();
    Bitmap myBitmap = BitmapFactory.decodeStream(input);
    return myBitmap;
} catch (IOException e) {
    e.printStackTrace();
    return null;
}

Answer 6

试试这个......可能对你有帮助..

URL url = new URL("YourUrl");
Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
imageView.setImageBitmap(bmp);

在图像视图中显示URL中的图像

6 个答案: