當我最小化並返回到應用程序時，應用程序崩潰屏幕變黑

Question

當我最小化時，我的應用程序崩潰，關閉3G並返回到應用程序。 該應用程序捕捉來自互聯網（SAX解析器）的XML信息，然後按主頁按鈕，關閉3G，並返回到應用程序看起來黑色。

感謝您的幫助

我主要的代碼

SitesList5101 sitesList5101 = null; 


static final int DIALOG_ERROR_CONNECTION = 1; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.xmlultimoterceroo); 

    TextView nemotecnico[]; 
    TextView precio[]; 
    TextView variacion[]; 
    TextView ttransado[]; 
    TextView pcierre[]; 
    TextView utrans[]; 

    TableRow tr[] = new TableRow[108]; 
    TableLayout layout = (TableLayout)findViewById(R.id.layout); 


      try{ 

       SAXParserFactory spf = SAXParserFactory.newInstance(); 
       SAXParser sp = spf.newSAXParser(); 
       XMLReader xr = sp.getXMLReader(); 

       URL sourceUrl = new URL("http://www.bovalpo.com/cgi-local/xml_bcv.pl?URL=5101"); 
       MyXMLHandler5101 myXMLHandler = new MyXMLHandler5101(); 
       xr.setContentHandler(myXMLHandler); 
       xr.parse(new InputSource(sourceUrl.openStream())); 

      } catch (Exception e){ 
       System.out.println("XML PArsing Exc =" +e); 
      } 




    sitesList5101 = MyXMLHandler5101.sitesList5101; 

    nemotecnico = new TextView[sitesList5101.getNemotecnico().size()]; 
    precio = new TextView[sitesList5101.getPrecio().size()]; 
    variacion = new TextView[sitesList5101.getVariacion().size()]; 
    ttransado = new TextView[sitesList5101.getTtransado().size()]; 
    pcierre = new TextView[sitesList5101.getPcierre().size()]; 
    utrans = new TextView[sitesList5101.getUtrans().size()]; 

    for(int i = 0; i < sitesList5101.getRegistro().size(); i++){ 

     nemotecnico[i] = new TextView(this); 
     nemotecnico[i].setText(" "+ sitesList5101.getNemotecnico().get(i)); 
     nemotecnico[i].setTextColor(Color.parseColor("#000000")); 
     nemotecnico[i].setTypeface(null, Typeface.BOLD); 


     precio[i] = new TextView(this); 
     precio[i].setText(" "+ sitesList5101.getPrecio().get(i)); 
     precio[i].setTextColor(Color.parseColor("#333333")); 
     precio[i].setTypeface(null, Typeface.BOLD); 


     variacion[i] = new TextView(this); 
     variacion[i].setText(" "+ sitesList5101.getVariacion().get(i)); 
     variacion[i].setTextColor(Color.parseColor("#000000")); 
     variacion[i].setTypeface(null, Typeface.BOLD); 


     ttransado[i] = new TextView(this); 
     ttransado[i].setText(" "+ sitesList5101.getTtransado().get(i)); 
     ttransado[i].setTextColor(Color.parseColor("#333333")); 
     ttransado[i].setTypeface(null, Typeface.BOLD); 


     pcierre[i] = new TextView(this); 
     pcierre[i].setText(" "+ sitesList5101.getPcierre().get(i)); 
     pcierre[i].setTextColor(Color.parseColor("#333333")); 
     pcierre[i].setTypeface(null, Typeface.BOLD); 

     utrans[i] = new TextView(this); 
     utrans[i].setText(" "+ sitesList5101.getUtrans().get(i)); 
     utrans[i].setTextColor(Color.parseColor("#333333")); 
     utrans[i].setTypeface(null, Typeface.BOLD); 

     nemotecnico[i].setTextSize(10); 
     precio[i].setTextSize(11); 
     variacion[i].setTextSize(11); 
     ttransado[i].setTextSize(11); 
     pcierre[i].setTextSize(11); 
     utrans[i].setTextSize(11); 

     Pattern pattern = Pattern.compile("^([a-z: ]*)?+(\\+?[0-9]+([,\\.][0-9]*)?)$"); 
     Matcher matcher = pattern.matcher(sitesList5101.getVariacion().get(i)); 
     if(!matcher.matches()) 

     variacion[i].setTextColor(Color.parseColor("#ff0000")); 
     else 
     variacion[i].setTextColor(Color.parseColor("#006633")); 

    } 

    int cont = sitesList5101.getNemotecnico().size(); 

    for(int i =0; i<cont; i++){ 
     tr[i] = new TableRow(this); 

     tr[i].addView(nemotecnico[i], new TableRow.LayoutParams(1)); 
     tr[i].addView(precio[i], new TableRow.LayoutParams(2)); 
     tr[i].addView(variacion[i], new TableRow.LayoutParams(3)); 
     tr[i].addView(ttransado[i], new TableRow.LayoutParams(4)); 
     tr[i].addView(pcierre[i], new TableRow.LayoutParams(5)); 


     layout.addView(tr[i], new TableLayout.LayoutParams()); 

    } 
} 

/********* AlertDialog *********************************************/ 
/********* AlertDialog *********************************************/ 

    public boolean isOnline(Context c) { 
     ConnectivityManager cm = (ConnectivityManager) c 
     .getSystemService(Context.CONNECTIVITY_SERVICE); 
     NetworkInfo ni = cm.getActiveNetworkInfo(); 

     if (ni != null && ni.isConnected()) 
      return true; 
     else 
      return false; 
     } 

    @Override 
    protected Dialog onCreateDialog(int id) { 
     Dialog dialog = null; 
     switch (id) { 
     case DIALOG_ERROR_CONNECTION: 
     AlertDialog.Builder errorDialog = new AlertDialog.Builder(this); 
     errorDialog.setTitle("Problema de Conexión"); 
     errorDialog.setMessage("No tiene conexión a internet, es necesario para acceder al contenido"); 
     errorDialog.setNeutralButton("ACEPTAR", 
     new DialogInterface.OnClickListener() { 


      public void onClick(DialogInterface dialog, int id) { 
      finish(); 
      } 
     }); 

     AlertDialog errorAlert = errorDialog.create(); 
     return errorAlert; 

     default: 
     break; 
     } 
    return dialog; 
    } 

    /********* AlertDialog *********************************************/ 
    /********* AlertDialog *********************************************/ 

public void refrescar8(View view){ 
    Button button = (Button)findViewById(R.id.button1); 

    if (!isOnline(this)) { 
     if(view==button) 
      button.setBackgroundResource(R.drawable.buttonrefresh7); 
     showDialog(DIALOG_ERROR_CONNECTION); //displaying the created dialog. 
    } else { 
     if(view==button) 
      button.setBackgroundResource(R.drawable.buttonrefresh7); 
    onRestart(); 
    } 
} 

@Override 
protected void onRestart() { 
    // TODO Auto-generated method stub 
    super.onRestart(); 
    Intent i = new Intent(xml5101.this, xml5101.class); 
    startActivity(i); 
    finish(); 
} 

}

Answer 1

如果關閉GSM，是否有WIFI連接或網絡連接沒有？ 如果沒有互聯網連接，訪問URL將失敗並拋出異常，並將其捕獲並打印到stdout。你檢查過LogCat輸出嗎？