Question

如果我使用，写道该程序已停止工作。我不懂为什么。该程序旨在从示例页面获取文本，保存，然后在屏幕上读取和写入。我来给你一些日志。

import android.os.Bundle;

import android.support.v7.app.ActionBarActivity;

import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

import java.io.File;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;


public class MainActivity extends ActionBarActivity {
    Button b1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b1=(Button) findViewById(R.id.i2);
        View.OnClickListener l = new View.OnClickListener(){
            public void onClick (View arg0) {
                try {
                    Document string = (Document) Jsoup.connect("http://sportstream.cba.pl/login.txt").get(); //example website
                    Elements b = string.select("body");
                    PrintWriter zapis = new PrintWriter("test1.txt");
                    zapis.println(b);
                    zapis.close();
                    Scanner odczyt = new Scanner(new File("test1.txt"));
                    String text = odczyt.nextLine();
                    TextView asd = (TextView)findViewById(R.id.t1);
                    asd.setText(text);
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }};
        b1.setOnClickListener(l);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

}

02-14 21：44：16.015 3282-3282 / com.example.bk.tetet E / AndroidRuntime：致命异议：主要 android.os.NetworkOnMainThreadException 在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork（StrictMode.java:1117） at java.net.InetAddress.lookupHostByName（InetAddress.java:385） at java.net.InetAddress.getAllByNameImpl（InetAddress.java:236） at java.net.InetAddress.getAllByName（InetAddress.java:214）在libcore.net.http.HttpConnection。（HttpConnection.java:70）在libcore.net.http.HttpConnection。（HttpConnection.java:50）在libcore.net.http.HttpConnection $ Address.connect（HttpConnection.java:340）在libcore.net.http.HttpConnectionPool.get（HttpConnectionPool.java:87）在libcore.net.http.HttpConnection.connect（HttpConnection.java:128）在libcore.net.http.HttpEngine.openSocketConnection（HttpEngine.java:315）在libcore.net.http.HttpEngine.connect（HttpEngine.java:310）在libcore.net.http.HttpEngine.sendSocketRequest（HttpEngine.java:289）在libcore.net.http.HttpEngine.sendRequest（HttpEngine.java:239）在libcore.net.http.HttpURLConnectionImpl.connect（HttpURLConnectionImpl.java:80） at org.jsoup.helper.HttpConnection $ Response.execute（HttpConnection.java:449） at org.jsoup.helper.HttpConnection $ Response.execute（HttpConnection.java:434）在org.jsoup.helper.HttpConnection.execute（HttpConnection.java:181）在org.jsoup.helper.HttpConnection.get（HttpConnection.java:170） at com.example.bk.tetet.MainActivity $ 1.onClick（MainActivity.java:35）在android.view.View.performClick（View.java:4101）在android.view.View $ PerformClick.run（View.java:17087）在android.os.Handler.handleCallback（Handler.java:615）在android.os.Handler.dispatchMessage（Handler.java:92）在android.os.Looper.loop（Looper.java:137）在android.app.ActivityThread.main（ActivityThread.java:4849） at java.lang.reflect.Method.invokeNative（Native Method）在java.lang.reflect.Method.invoke（Method.java:511）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:795）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:562）在dalvik.system.NativeStart.main（本地方法）

这里有什么不好的？

0 个答案: