Android 到达 getInputStream 时崩溃

Question

我构建了这段代码来从 URL 获取 XML我使用了 AsyncTask，当到达 getInputStream() 点时，半身应用程序仍然崩溃

重点是我想从 url 获取 XML 作为字符串。

我尝试不使用 AsyncTask，但应用程序仍然崩溃

我尝试将 GetXML() 函数放在 AsyncTask 之外并从 AsyncTask 内部调用，但仍然崩溃。

我尝试将 GetXML() 函数放入 AsyncTask 中并从 AsyncTask 中调用，但仍然崩溃。

有谁知道是什么原因以及如何解决吗？谢谢

package com.asmgx.test15.app;

import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        AsyncTaskRunner runner = new AsyncTaskRunner();
        runner.execute();
    }




    private class AsyncTaskRunner extends AsyncTask<String, String, String> {

        private String resp;

        private void GetXML() {
            try {
                URL url = new URL("http://api.androidhive.info/pizza/?format=xml");
                URLConnection conn = url.openConnection();

                DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                DocumentBuilder builder = factory.newDocumentBuilder();
                InputStream is = conn.getInputStream(); // CRASH HERE
                Document doc = builder.parse(is);

            }
            catch (MalformedURLException e) {
            }
            catch (IOException e) {
            }
            catch (ParserConfigurationException e) {
            }
            catch (SAXException e) {
            }
        }

        @Override
        protected String doInBackground(String... params) {
            publishProgress("Sleeping..."); // Calls onProgressUpdate()

                // Do your long operations here and return the result
                //int time = Integer.parseInt(params[0]);
                // Sleeping for given time period
                GetXML();
                resp = "Slept for 25562 milliseconds";

            return resp;
        }

        /*
         * (non-Javadoc)
         *
         * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
         */
        @Override
        protected void onPostExecute(String result) {
            // execution of result of Long time consuming operation
            //finalResult.setText(result);
        }

        /*
         * (non-Javadoc)
         *
         * @see android.os.AsyncTask#onPreExecute()
         */
        @Override
        protected void onPreExecute() {
            // Things to be done before execution of long running operation. For
            // example showing ProgessDialog
        }

        /*
         * (non-Javadoc)
         *
         * @see android.os.AsyncTask#onProgressUpdate(Progress[])
         */
        @Override
        protected void onProgressUpdate(String... text) {
            //finalResult.setText(text[0]);
            // Things to be done while execution of long running operation is in
            // progress. For example updating ProgessDialog
        }
    }

   }

这是 Logicat 错误

07-04 04:49:53.433    1850-1863/com.asmgx.test15.app E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
    Process: com.asmgx.test15.app, PID: 1850
    java.lang.RuntimeException: An error occured while executing doInBackground()
            at android.os.AsyncTask$3.done(AsyncTask.java:300)
            at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
            at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
            at java.util.concurrent.FutureTask.run(FutureTask.java:242)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.ErrnoException: getaddrinfo failed: EACCES (Permission denied)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
07-04 04:49:56.643    1850-1863/com.asmgx.test15.app I/Process﹕ Sending signal. PID: 1850 SIG: 9
07-04 04:50:31.313    1899-1899/com.asmgx.test15.app W/ActivityThread﹕ Application com.asmgx.test15.app is waiting for the debugger on port 8100...
07-04 04:50:31.363    1899-1899/com.asmgx.test15.app I/System.out﹕ Sending WAIT chunk
07-04 04:50:31.393    1899-1905/com.asmgx.test15.app I/dalvikvm﹕ Debugger is active
07-04 04:50:31.583    1899-1899/com.asmgx.test15.app I/System.out﹕ Debugger has connected
07-04 04:50:31.583    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:31.793    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:32.073    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:32.273    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:32.473    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:32.673    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:32.883    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:33.083    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:33.283    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:33.483    1899-1899/com.asmgx.test15.app I/System.out﹕ waiting for debugger to settle...
07-04 04:50:33.683    1899-1899/com.asmgx.test15.app I/System.out﹕ debugger has settled (1365)
07-04 04:50:46.343    1899-1899/com.asmgx.test15.app D/gralloc_goldfish﹕ Emulator without GPU emulation detected.
07-04 04:50:54.343    1899-1914/com.asmgx.test15.app D/dalvikvm﹕ GC_FOR_ALLOC freed 215K, 9% free 3170K/3452K, paused 46ms, total 46ms
07-04 04:50:57.773    1899-1914/com.asmgx.test15.app W/dalvikvm﹕ threadid=11: thread exiting with uncaught exception (group=0xb1ab6ba8)
07-04 04:51:04.553    1899-1914/com.asmgx.test15.app E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
    Process: com.asmgx.test15.app, PID: 1899
    java.lang.RuntimeException: An error occured while executing doInBackground()
            at android.os.AsyncTask$3.done(AsyncTask.java:300)
            at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
            at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
            at java.util.concurrent.FutureTask.run(FutureTask.java:242)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.ErrnoException: getaddrinfo failed: EACCES (Permission denied)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity.GetXML(MainActivity.java:44)
            at com.asmgx.test15.app.MainActivity.access$100(MainActivity.java:25)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:68)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:57)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
07-04 05:15:28.973    2141-2141/com.asmgx.test15.app D/dalvikvm﹕ Not late-enabling CheckJNI (already on)
07-04 05:15:31.803    2141-2141/com.asmgx.test15.app D/gralloc_goldfish﹕ Emulator without GPU emulation detected.
07-04 05:15:33.073    2141-2154/com.asmgx.test15.app W/dalvikvm﹕ threadid=11: thread exiting with uncaught exception (group=0xb1ab6ba8)
07-04 05:15:33.133    2141-2154/com.asmgx.test15.app D/dalvikvm﹕ GC_FOR_ALLOC freed 202K, 8% free 3183K/3452K, paused 43ms, total 43ms
07-04 05:15:33.173    2141-2154/com.asmgx.test15.app E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
    Process: com.asmgx.test15.app, PID: 2141
    java.lang.RuntimeException: An error occured while executing doInBackground()
            at android.os.AsyncTask$3.done(AsyncTask.java:300)
            at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
            at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
            at java.util.concurrent.FutureTask.run(FutureTask.java:242)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.GetXML(MainActivity.java:51)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:72)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:40)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.GetXML(MainActivity.java:51)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:72)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:40)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
     Caused by: libcore.io.ErrnoException: getaddrinfo failed: EACCES (Permission denied)
            at libcore.io.Posix.getaddrinfo(Native Method)
            at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
            at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
            at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
            at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
            at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
            at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
            at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.GetXML(MainActivity.java:51)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:72)
            at com.asmgx.test15.app.MainActivity$AsyncTaskRunner.doInBackground(MainActivity.java:40)
            at android.os.AsyncTask$2.call(AsyncTask.java:288)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)

Answer 1

您在 list 中缺少 Internet 权限。

<uses-permission android:name="android.permission.INTERNET"/>

Why do you need it?