我想要你的帮助，当我在5或6号机器人上运行时，我的应用程序正常工作， 但是当我在android 4上运行它时会崩溃。
Maincativit.java
package com.onecode.humam.me;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.widget.Toast;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
list1 adapter;
List<items> n=new ArrayList<>();
private RecyclerView rv;
public items news_object;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.rv = (RecyclerView) findViewById(R.id.rv);
adapter=new list1(this,n);
rv.setHasFixedSize(true);
rv.setLayoutManager(new LinearLayoutManager(this));
rv.setAdapter(adapter);
new AsyncTask<String, Integer, Document>() {
@Override
protected void onPreExecute() {
super.onPreExecute();
Toast.makeText(MainActivity.this, "Start Loading Data", Toast.LENGTH_SHORT).show();
}
@Override
protected Document doInBackground(String... params) {
Document doc = null;
try {
doc = Jsoup.connect("http://www.non14.net/ملف-الأخبار/").get();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, " not work", Toast.LENGTH_SHORT).show();
}
return doc;
}
@Override
protected void onPostExecute(Document document) {
super.onPostExecute(document);
Toast.makeText(MainActivity.this, "finish Loading Data", Toast.LENGTH_SHORT).show();
Elements news = document.select("div.contentcolumn");
Elements title = news.select("div.catitems");
Log.d("MainActivity", "This is news = " + title);
for (Element el : title) {
news_object = new items();
news_object.setTitle(el.select("a").text());
news_object.setauther(el.select("a").attr("abs:href"));
// news_object.setDate(el.select("time").text());
// news_object.setDesc(el.select("div.cb-excerpt").select("p").text());
news_object.setimg(el.select("img").attr("abs:src"));
// news_object.setNp_views(el.select("div.cb-post-views.cb-byline-element").text());
//news_object.setAuther(el.select("div.cb-author.cb-byline-element").text());
Log.d("MainActivity", "This is news = " + news_object.getauther());
//Intent i=new Intent(getApplicationContext(),list1.class);
//ADD DATA TO OUR INTENT
//i.putExtra("Name", news_object.gettitle());
n.add(news_object);
adapter.notifyDataSetChanged();
// text.append("\n " + " " + el.select("h2").text());
// text.append("\n " + el.select("img").attr("src"));
// text.append("\n " + el.select("time").text());
// text.append("\n " + el.select("div.cb-author.cb-byline-element").text());
// text.append("\n " + el.select("div.cb-post-views.cb-byline-element").text());
// text.append("\n " + el.select("div.cb-excerpt").select("p").text());
}
}
}.execute();
}
}
mainactivit.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.tatbigy.jsoupandroidtut.MainActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#eee"
android:padding="10dp"
app:popupTheme="@style/TextAppearance.AppCompat">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher" />
</android.support.v7.widget.Toolbar>
<android.support.v7.widget.RecyclerView
android:id="@+id/rv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
和logcat
unable to find class referenced in signature (Landroid/view/SearchEvent;)
unable to resolve interface method 18299: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
VFY: unable to resolve interface method 18303: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
VFY: unable to resolve virtual method 451: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
VFY: unable to resolve virtual method 473: Landroid/content/res/TypedArray;.getType (I)I
java.net.UnknownHostException: Unable to resolve host "www.non14.net": No address associated with hostname
at java.net.InetAddress.lookupHostByName(InetAddress.java:424)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:362)
at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:512)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:493)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:205)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:194)
at com.onecode.humam.me.MainActivity$1.doInBackground(MainActivity.java:52)
at com.onecode.humam.me.MainActivity$1.doInBackground(MainActivity.java:41)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:856)
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:59)
at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
... 24 more
Caused by: libcore.io.ErrnoException: getaddrinfo failed: ENETUNREACH (Network is unreachable)
... 27 more
threadid=11: thread exiting with uncaught exception (group=0x41b18960)
FATAL EXCEPTION: AsyncTask #1
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
at java.util.concurrent.FutureTask.run(FutureTask.java:239)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:856)
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.<init>(Handler.java:197)
at android.os.Handler.<init>(Handler.java:111)
at android.widget.Toast$TN.<init>(Toast.java:370)
at android.widget.Toast.<init>(Toast.java:104)
at android.widget.Toast.makeText(Toast.java:261)
at com.onecode.humam.me.MainActivity$1.doInBackground(MainActivity.java:57)
at com.onecode.humam.me.MainActivity$1.doInBackground(MainActivity.java:41)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:856)
答案 0 :(得分：0)
您的应用程序崩溃了，这与Android版本无关，但是UnknownHostException您尝试访问主机“ www.non14.net ”但可能是服务器不存在......
答案 1 :(得分：0)
错误信息非常明确：Unable to resolve host "www.non14.net": No address associated with hostname，可能是由此行引起的
doc = Jsoup.connect("http://www.non14.net/ملف-الأخبار/").get();
答案 2 :(得分：0)
尝试将此添加到您的清单
<uses-permission android:name="android.permission.INTERNET" />
答案 3 :(得分：0)
你必须改变这个：
} catch (IOException e)
e.printStackTrace();
Toast.makeText(MainActivity.this, " not work", Toast.LENGTH_SHORT).show();
}
将其更改为
} catch (IOException e) {
e.printStackTrace();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, " not work", Toast.LENGTH_SHORT).show();
}
});
}