编写的Android应用出现The application has stopped unexpected,Please try again.该如何处理

package sim.activity;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.app.Activity;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.telephony.TelephonyManager;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.SubMenu;import android.view.ViewGroup;import android.view.ViewGroup.LayoutParams;import android.webkit.WebChromeClient;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.TextView;public class SIMActivity extends Activity {    /** Called when the activity is first created. */        private WebView webView = new WebView(this);        private Menu menu;        private int group1 = 1;        private int group2 = 2;        private Context mContext;              private Notification mNotification;          private NotificationManager mNotificationManager;          private final static int NOTIFICATION_ID = 0x0001;             @Override        public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                TextView tv = (TextView)findViewById(R.id.tv1);                TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);                   tm.getLine1Number();        String imei1 = tm.getDeviceId();        tm.getSubscriberId();                String imei2 ="0";         //这里为了安全起见我删掉了我的URL=-=        String url1 = "MyURL";        String Format1 = getResources().getString(R.string.imeis);        String imei = "";        int len = imei1.length();        if(len == 14){        imei = String.format(Format1,imei2,imei1);        }        else {imei = imei1;}                String urll = String.format(Format1,url1,imei);                //浏览器界面        webView.loadUrl(urll);        webView.setWebChromeClient(new WebChromeClient() {              public void onProgressChanged(WebView view, int progress) {                  setTitle("页面加载中，请稍候..." + progress + "%");                  setProgress(progress * 100);                  if (progress == 100) {                      setTitle(R.string.app_name);                  }              }          });          webView.setWebViewClient(new WebViewClient(){                            public boolean shouldOverrideUrlLoading(WebView view, String url) {                                view.loadUrl(url);                                return true;                            }                });                 setContentView(webView,new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,                ViewGroup.LayoutParams.WRAP_CONTENT));         //这里为了安全起见我删掉了我的URL=-=         String httpUrl = "myURL";         StringBuffer sb = new StringBuffer();         URL urlx = null;    try{        urlx = new URL(httpUrl);    }catch(MalformedURLException e){        e.printStackTrace();    }    if (urlx != null){        try{            HttpURLConnection urlConn =                     (HttpURLConnection) urlx.openConnection();            urlConn.connect();            InputStream input = urlConn.getInputStream();            InputStreamReader inputReader = new InputStreamReader(input);            BufferedReader reader = new BufferedReader(inputReader);            String inputLine = null;            while((inputLine = reader.readLine()) != null){                sb.append(inputLine).append("\n");            }            reader.close();            inputReader.close();            input.close();            urlConn.disconnect();            }catch(IOException e){                e.printStackTrace();                    }            }else{                Log.i("TAG","url is null");                }          String sbstr =null;          if (sb != null){                              String sbtr = sb.toString();              int sblen = sbtr.length();              int index=sbtr.lastIndexOf("|");                            sbstr=sbtr.substring(index+1,sblen);                            tv.setText(sbstr);          }else{              tv.setText("cannot get page");          }                    if (sbstr != null){              if (sbstr == "none"){                menu.setGroupVisible(group1, false);                menu.setGroupVisible(group2, true);              }else{                  menu.setGroupVisible(group1, true);                menu.setGroupVisible(group2, true);              }                        }else{System.out.println("null");}            }        public boolean onCreateOptionsMenu(Menu menu) {        menu.add(group2,1,1,"后退");        menu.add(group2,2,2,"前进");        SubMenu subMenu = menu.addSubMenu(group1, 100, 100, "系统通知");                subMenu.add(group1, 101, 101, "接收");                subMenu.add(group1, 102, 102, "不接收");         return true;    }        public boolean onOptionsItemSelected(MenuItem item){        switch (item.getItemId()){        case 1:            if(webView.canGoBack()){                webView.goBack();                return true;            }            break;        case 2:            if(webView.canGoForward()){                webView.goForward();                return true;            }            break;        case 101:               Intent mIntent = new Intent(mContext,SIMActivity.class);                  mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                      PendingIntent mContentIntent =PendingIntent.getActivity(mContext,0, mIntent, 0);                  mNotification.setLatestEventInfo(mContext, "通知", "有新的通知", mContentIntent);                  mNotificationManager.notify(NOTIFICATION_ID, mNotification);               break;        case 102:            mNotificationManager.cancel(NOTIFICATION_ID);            break;         default:             return super.onOptionsItemSelected(item);        }        return true;    }    public void setupViews(){          mContext = SIMActivity.this;                    mNotification = new Notification(R.drawable.ic_launcher,"new notification.",System.currentTimeMillis());          mNotification.defaults = Notification.DEFAULT_SOUND;          mNotificationManager = (NotificationManager)this.getSystemService(NOTIFICATION_SERVICE);   }  }