Java 添加视图时应用程序崩溃

我正在构建一个简单的“black jack”应用程序，我有一个令人讨厌的小错误。 我有两个线性布局，我给它们添加了卡片（每个布局有3张卡片）

有时应用程序崩溃，日志显示“index=1 count=0”。它发生在我尝试将卡片添加到第二个布局时

有时它确实有效，游戏也有效。。 这是有bug的类：

private void computerTurn() {

    if(x<=4 && computer.getCardsSum()<=16)
        flag= true;             
    if(x<=4 && computer.getCardsSum()>16 )
        flag= false;
    if(x>=5 && computer.getCardsSum()<=18)
        flag= true;
    if(x>=5 && computer.getCardsSum()>18)       
            flag=false;
    if(computer.getCardsSum()>=21)
            flag=false; 

    if (flag == false && lastTurn == false) {

        LayoutInflater li = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = li.inflate(R.layout.topcardview, null);
        AssetManager assat = getAssets();
        InputStream steam;
        ImageView img = (ImageView) view.findViewById(R.id.imageView1);     

        cards tempCard = dealer.getDelersCards().get(0);
        computer.addCardToPlayer(dealer.getDelersCards().remove(0));
        computerCardSum += tempCard.getValue();
        try {
            if (cameFromLastTurn == false)
                steam = assat.open("cards/cardsBack.png");
            else
                steam = assat.open(tempCard.getImgPath());
            Drawable d = Drawable.createFromStream(steam, null);
            img.setImageDrawable(d);
            LinearLayout.LayoutParams myLayoutParams = new LinearLayout.LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            myLayoutParams.leftMargin = -15;
            myLayoutParams.rightMargin = -20;
            myLayoutParams.width =width/8 ;
            myLayoutParams.height = height/6;
            img.setLayoutParams(myLayoutParams);

            if (computerCardIndex < 3) {
                playerTwoLinearLayout.addView(view, computerCardIndex);
                lastTurn = true;
                computerCardValueSum.setText("sum= ?");
                computerCardIndex++;
                playersSecondRowIndex=0;
            } else {
                playerTwoSecondRowLinearLayout.addView(view,  computerSecondRowIndex);
                lastTurn = true;
                computerCardValueSum.setText("sum= ?");
                computerSecondRowIndex++;

            }

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    if (flag == true) {

        LayoutInflater li = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = li.inflate(R.layout.topcardview, null);
        AssetManager assat = getAssets();
        InputStream steam;
        ImageView img = (ImageView) view.findViewById(R.id.imageView1);     

        cards tempCard = dealer.getDelersCards().get(0);
        computer.addCardToPlayer(dealer.getDelersCards().remove(0));
        computerCardSum += tempCard.getValue();
        try {
            if (cameFromLastTurn == false)
                steam = assat.open("cards/cardsBack.png");
            else
                steam = assat.open(tempCard.getImgPath());
            Drawable d = Drawable.createFromStream(steam, null);
            img.setImageDrawable(d);
            LinearLayout.LayoutParams myLayoutParams = new LinearLayout.LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            myLayoutParams.leftMargin = -15;
            myLayoutParams.rightMargin = -20;
            myLayoutParams.width =width/8 ;
            myLayoutParams.height = height/6;
            img.setLayoutParams(myLayoutParams);
            if (computerCardIndex < 3) {
                playerTwoLinearLayout.addView(view, computerCardIndex);
                computerCardValueSum.setText("sum= ?");
                computerCardIndex++;
                playersSecondRowIndex=0;
            } else {
                playerTwoSecondRowLinearLayout.addView(view, playersSecondRowIndex);
                computerCardValueSum.setText("sum= ?");
                playersSecondRowIndex++;

            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    hitMe.setOnClickListener(hitMeListener);
}

---

谢谢：）

这里提到了罪犯：

E/AndroidRuntime(8981): java.lang.IndexOutOfBoundsException: index=1 count=0
E/AndroidRuntime(8981):     at android.view.ViewGroup.addInArray(ViewGroup.java:3452)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addViewInner(ViewGroup.java:3387)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addView(ViewGroup.java:3236)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addView(ViewGroup.java:3181)
E/AndroidRuntime(8981):     at com.example.homework_cardgame.Main_CardGame_Activity.computerTurn(Main_CardGame_Activity.java:346)

---

因此，基本上您得到的是空数组（

count=0

），但您试图获取位置1处的元素，因此在

Main\u CardGame\u Activity.java

line 346

Main\u CardGame\u Activity.java:346这是哪一行？您在错误日志Main\u CardGame\u Activity.computerTurn（）中发布了答案正在引发边界异常的索引。您有0个条目，正在尝试访问索引1。你在发帖前看过吗？我不明白。。。它说问题是在数组中还是在添加视图中？这是第346行：playerWOSecondRowLinearLayout.addView（视图，playerSecondRowIndex）；我发现了问题。。。菜鸟的错误。。在：playerWOSecondRowLinearLayout.addView（视图，playerSecondRowIndex）；我使用playerSecondRowIndex，我在其他类中也使用它。。。我改了，到目前为止没有问题。。。thx的帮助：）

E/AndroidRuntime(8981): java.lang.IndexOutOfBoundsException: index=1 count=0
E/AndroidRuntime(8981):     at android.view.ViewGroup.addInArray(ViewGroup.java:3452)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addViewInner(ViewGroup.java:3387)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addView(ViewGroup.java:3236)
E/AndroidRuntime(8981):     at android.view.ViewGroup.addView(ViewGroup.java:3181)
E/AndroidRuntime(8981):     at com.example.homework_cardgame.Main_CardGame_Activity.computerTurn(Main_CardGame_Activity.java:346)