在Android中使用样板 [英] Using boilerpipe in Android
问题描述
Boilerpipe是一个基本上从网页中提取主要内容的库.对于新闻网站，要提取内容特别困难，因为格式因站点而异.因此，我尝试集成样板库- https://code.google.com/p/boilerpipe/wiki/QuickStart
Boilerpipe is a library that basically extracts the main content from a webpage. For news websites, it is especially hard to extract the content as the formatting differs from site to site. So I've tried to integrate the boilerpipe library - https://code.google.com/p/boilerpipe/wiki/QuickStart
根据安装指南，我已将以下内容添加到我的Java类路径中:boilerpipe-VERSION.jar，nekohtml-1.9.13.jar和xerces-2.9.1.jar
As per the installing guide, I have added the following to my Java classpath - boilerpipe-VERSION.jar, nekohtml-1.9.13.jar and xerces-2.9.1.jar
我正在尝试处理样管以及涉及该样管的应用程序流
我有一个列表视图，其中有文章列表.我已经设置了 onItemClickListener ，这样，当您单击 listview 上的任何项目时，它都会使用该文章专用的 url 并使用锅炉从该文章中提取文本，并启动新活动，并在 textview 中将其打印出来.
I have a list view where there are a list of articles. I've set up an onItemClickListener such that when you click on any of the items on the listview, it takes the url specific to that article and uses boilerpipe to extract the text from that article and starts a new activity where it is printed in textview.
问题
单击列表中的一项后，我的应用程序崩溃. a.，因为我是初学者，所以不确定我编写的代码是否正确.请原谅我.如果不正确，该如何解决?我觉得网址可能有问题. b.如果我没有正确安装样板，正确的做法是什么
My application crashes once I click on one of the items in the list. a. I'm not sure if the code I've written is correct, as I'm a beginner. Please excuse me for that. If it is incorrect, how can I fix it? I have a feeling it may be a problem with the url. b. If I haven't installed boilerplate correctly, what is the correct way of doing it
列出活动:
ListView lv = getListView();
// Launching new screen on Selecting Single ListItem
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent in = new Intent(getApplicationContext(), ArticleActivity.class);
// getting page url
String page_url = ((TextView) view.findViewById(R.id.page_url)).getText().toString();
Toast.makeText(getApplicationContext(), page_url, Toast.LENGTH_SHORT).show();
URL url = null;
try {
url = new URL(page_url);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// NOTE: Use ArticleExtractor unless DefaultExtractor gives better results for you
try {
String text = null;
text = ArticleExtractor.INSTANCE.getText(url);
in.putExtra("text", text);
} catch (BoilerpipeProcessingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
startActivity(in);
});
}
文章活动:
public class ArticleActivity extends Activity{
Intent in = getIntent();
String text = in.getStringExtra("text");
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.article_view);
TextView tv;
tv = (TextView) findViewById(R.id.page_url);
tv.setText(text);
}
}
article_view.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<!-- Article Title -->
<TextView android:id="@+id/content_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="10dp"
android:paddingBottom="8dp"
android:textSize="18sp"
android:textStyle="bold"
android:textColor="#dc6800"/>
</RelativeLayout>
堆栈跟踪:
USER_COMMENT=null
ANDROID_VERSION=4.1.2
APP_VERSION_NAME=1.0
BRAND=samsung
PHONE_MODEL=GT-N8000
CUSTOM_DATA=
STACK_TRACE=android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
at java.net.InetAddress.getAllByName(InetAddress.java:214)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
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:315)
at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
at libcore.net.http.HttpURLConnectionImpl.getHeaderField(HttpURLConnectionImpl.java:130)
at java.net.URLConnection.getContentType(URLConnection.java:326)
at de.l3s.boilerpipe.sax.HTMLFetcher.fetch(HTMLFetcher.java:35)
at de.l3s.boilerpipe.extractors.ExtractorBase.getText(ExtractorBase.java:87)
at com.j.infographx.ListRSSItemsActivity$1.onItemClick(ListRSSItemsActivity.java:94)
at android.widget.AdapterView.performItemClick(AdapterView.java:301)
at android.widget.AbsListView.performItemClick(AbsListView.java:1287)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3078)
at android.widget.AbsListView$1.run(AbsListView.java:4161)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
at dalvik.system.NativeStart.main(Native Method)
推荐答案
这是它的常见问题...您只是使用AsyncTask.看到那个...
i thing its common problem... u just use AsyncTask. see that....
Android 4.0`android.os.StrictMode $上的异常AndroidBlockGuardPolicy.onNetwork(StrictMode)`
不要阻止主ui使用子线程...
don't block main ui use child thread...
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