特定のWebサイト（これはWebサイトです）からテーブルデータを取得しようとしていますが、特定のノードを取得しようとして試しています。これが私の試みです：
public class ScheudeleWithDesign extends Activity {
static final String urlToParse = "https://www.easistent.com/urniki/263/razredi/18221";
static final String xpathTableContents = "//div[@id='text11']/td/tr";
TextView tw1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scheudele_with_design);
tw1 = (TextView) findViewById(R.id.urnikText);
String value = "";
try {
value = getScheudele();
tw1.setText(value);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XPatherException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}//End of onCreate
public String getScheudele() throws IOException, XPatherException{
String stats = null;
//cleaner properties
HtmlCleaner cleaner = new HtmlCleaner();
CleanerProperties props = cleaner.getProperties();
props.setAllowHtmlInsideAttributes(false);
props.setAllowMultiWordAttributes(false);
props.setRecognizeUnicodeChars(true);
props.setOmitComments(true);
//URL object
URL url = new URL(urlToParse);
//HTML page root node
TagNode root = cleaner.clean(url);
//query XPath
Object[] node = root.evaluateXPath(xpathTableContents);
//Vzemi podatke če najdeš element
if (node.length > 0) {
TagNode resultNode = (TagNode)node[0];
stats = resultNode.getText().toString();
}
return stats;
}
これは機能しません。アプリがクラッシュし、これが logcat です。
09-22 11:22:08.632: E/AndroidRuntime(29385): FATAL EXCEPTION: main
09-22 11:22:08.632: E/AndroidRuntime(29385): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.whizzapps.stpsurniki/com.whizzapps.stpsurniki.ScheudeleWithDesign}: android.os.NetworkOnMainThreadException
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread.access$600(ActivityThread.java:141)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.os.Handler.dispatchMessage(Handler.java:99)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.os.Looper.loop(Looper.java:137)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.lang.reflect.Method.invokeNative(Native Method)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.lang.reflect.Method.invoke(Method.java:525)
09-22 11:22:08.632: E/AndroidRuntime(29385): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-22 11:22:08.632: E/AndroidRuntime(29385): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-22 11:22:08.632: E/AndroidRuntime(29385): at dalvik.system.NativeStart.main(Native Method)
09-22 11:22:08.632: E/AndroidRuntime(29385): Caused by: android.os.NetworkOnMainThreadException
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.net.InetAddress.getAllByName(InetAddress.java:214)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:461)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:433)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:282)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:177)
09-22 11:22:08.632: E/AndroidRuntime(29385): at libcore.net.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:271)
09-22 11:22:08.632: E/AndroidRuntime(29385): at java.net.URL.openStream(URL.java:462)
09-22 11:22:08.632: E/AndroidRuntime(29385): at org.htmlcleaner.Utils.readUrl(Utils.java:63)
09-22 11:22:08.632: E/AndroidRuntime(29385): at org.htmlcleaner.HtmlCleaner.clean(HtmlCleaner.java:373)
09-22 11:22:08.632: E/AndroidRuntime(29385): at org.htmlcleaner.HtmlCleaner.clean(HtmlCleaner.java:387)
09-22 11:22:08.632: E/AndroidRuntime(29385): at com.whizzapps.stpsurniki.ScheudeleWithDesign.getScheudele(ScheudeleWithDesign.java:63)
09-22 11:22:08.632: E/AndroidRuntime(29385): at com.whizzapps.stpsurniki.ScheudeleWithDesign.onCreate(ScheudeleWithDesign.java:36)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.Activity.performCreate(Activity.java:5133)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-22 11:22:08.632: E/AndroidRuntime(29385): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
09-22 11:22:08.632: E/AndroidRuntime(29385): ... 11 more