img_url = new URL("http://graph.facebook.com/" + user.getId() + "/picture?type=large");
InputStream is = img_url.openConnection().getInputStream();
Bitmap avatar;
avatar = BitmapFactory.decodeStream(is);
ivAvatar.setImageBitmap(avatar);
当我获取Facebook个人资料照片时,发生以下错误。
android.os.NetworkOnMainThreadException
如何解决?
答案 0 :(得分:5)
您编辑(删除)的部分问题(仅供参考)
你错过了http:// http://graph.facebook.com/100001119045663/picture?type=large中的第二个/。
java.net.UnknownHostException: http:/graph.facebook.com/100001119045663/picture?type=large
java.net.UnkownHostException描述它无法访问URL,无论是连接问题还是格式错误/无效的URL。
第二部分 - 问题添加 NetworkOnMainThread非常具有描述性。如果您正在从onCreate,onResume等调用函数,那么您正在UI线程上执行代码。这意味着如果你正在处理代码,你可以冻结UI。您需要创建一个单独的任务或线程。有关我所说的内容以及如何实施解决方案的更多信息,请参阅http://www.vogella.com/tutorials/AndroidBackgroundProcessing/article.html
TLDR版本......
package de.vogella.android.asynctask;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import de.vogella.android.asyntask.R;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class ReadWebpageAsyncTask extends Activity {
private TextView textView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
HTTPExample task = new HTTPExample ();
task.execute(new String[] { "http://pictureurl.com/image.jpg" });
}
private class HTTPExample extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
//urls is an array not a string, so iterate through urls.
//Get Picture Here - BUT DONT UPDATE UI, Return a reference of the object
return response;
}
@Override
protected void onPostExecute(String result) {
//Update UI
Log.i("Result", result);
}
}
}