package com.example.abc;
import java.io.IOException;
import java.net.URL;
import org.jsoup.*;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
String uri="http://www.example.com/";
Document doc = Jsoup.connect(uri).get();
Elements lk= doc.getElementsByTag("a");
String lss=null;
for(Element links : lk)
{
lss=links.text();
}
TextView t4=(TextView)findViewById(R.id.textView2);
t4.setText(lss);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/ *我也在我的清单文件中给出了，但是当我运行它时我的程序崩溃并且不幸地显示，abc已停止。我是一个在android中报废的初学者。任何帮助都非常感谢* /
/*this is my stack trace.*/
08-09 18:00:01.033: W/dalvikvm(3106): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
08-09 18:00:01.094: E/AndroidRuntime(3106): FATAL EXCEPTION: main
08-09 18:00:01.094: E/AndroidRuntime(3106): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.abc/com.example.abc.MainActivity}: android.os.NetworkOnMainThreadException
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.os.Handler.dispatchMessage(Handler.java:99)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.os.Looper.loop(Looper.java:137)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread.main(ActivityThread.java:5041)
08-09 18:00:01.094: E/AndroidRuntime(3106): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 18:00:01.094: E/AndroidRuntime(3106): at java.lang.reflect.Method.invoke(Method.java:511)
08-09 18:00:01.094: E/AndroidRuntime(3106): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-09 18:00:01.094: E/AndroidRuntime(3106): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
08-09 18:00:01.094: E/AndroidRuntime(3106): at dalvik.system.NativeStart.main(Native Method)
08-09 18:00:01.094: E/AndroidRuntime(3106): Caused by: android.os.NetworkOnMainThreadException
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
08-09 18:00:01.094: E/AndroidRuntime(3106): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
08-09 18:00:01.094: E/AndroidRuntime(3106): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
08-09 18:00:01.094: E/AndroidRuntime(3106): at java.net.InetAddress.getAllByName(InetAddress.java:214)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
08-09 18:00:01.094: E/AndroidRuntime(3106): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
08-09 18:00:01.094: E/AndroidRuntime(3106): at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:425)
08-09 18:00:01.094: E/AndroidRuntime(3106): at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:410)
08-09 18:00:01.094: E/AndroidRuntime(3106): at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:164)
08-09 18:00:01.094: E/AndroidRuntime(3106): at org.jsoup.helper.HttpConnection.get(HttpConnection.java:153)
08-09 18:00:01.094: E/AndroidRuntime(3106): at com.example.abc.MainActivity.onCreate(MainActivity.java:79)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.Activity.performCreate(Activity.java:5104)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
08-09 18:00:01.094: E/AndroidRuntime(3106): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
08-09 18:00:01.094: E/AndroidRuntime(3106): ... 11 more
答案 0 :(得分：0)
您使用的网站链接是否存在问题，或者您是否未设置网络权限（uses-permission android：name =＆＃34; android.permission.INTERNET＆＃34;）或模拟器或设备你的使用有互联网问题。
您还应该将文本视图移动到try方法上方，如下所示：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView t4=(TextView)findViewById(R.id.textView2);
尝试{//在此输入代码 }
我在不使用android库/概念的情况下继续使用java，并且没有错误地工作正常。