我正在构建一个简单的“黑杰克”应用程序，我有这个小烦人的bug。 我有两个线性布局女巫我添加卡（每个布局有3张卡）。
有时应用程序崩溃，日志显示“index = 1 count = 0”。当我尝试将卡添加到第二个布局时，就会发生这种情况。
有时它确实有效并且游戏有效...... 这是带有错误的类：
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);
}
这是日志猫：
01-07 17:45:33.690: E/AndroidRuntime(8981): FATAL EXCEPTION: main
01-07 17:45:33.690: E/AndroidRuntime(8981): java.lang.IndexOutOfBoundsException: index=1 count=0
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.view.ViewGroup.addInArray(ViewGroup.java:3452)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.view.ViewGroup.addViewInner(ViewGroup.java:3387)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.view.ViewGroup.addView(ViewGroup.java:3236)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.view.ViewGroup.addView(ViewGroup.java:3181)
01-07 17:45:33.690: E/AndroidRuntime(8981): at com.example.homework_cardgame.Main_CardGame_Activity.computerTurn(Main_CardGame_Activity.java:346)
01-07 17:45:33.690: E/AndroidRuntime(8981): at com.example.homework_cardgame.Main_CardGame_Activity.access$0(Main_CardGame_Activity.java:257)
01-07 17:45:33.690: E/AndroidRuntime(8981): at com.example.homework_cardgame.Main_CardGame_Activity$1$1.run(Main_CardGame_Activity.java:244)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.os.Handler.handleCallback(Handler.java:725)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.os.Handler.dispatchMessage(Handler.java:92)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.os.Looper.loop(Looper.java:158)
01-07 17:45:33.690: E/AndroidRuntime(8981): at android.app.ActivityThread.main(ActivityThread.java:5751)
01-07 17:45:33.690: E/AndroidRuntime(8981): at java.lang.reflect.Method.invokeNative(Native Method)
01-07 17:45:33.690: E/AndroidRuntime(8981): at java.lang.reflect.Method.invoke(Method.java:511)
01-07 17:45:33.690: E/AndroidRuntime(8981): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083)
01-07 17:45:33.690: E/AndroidRuntime(8981): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850)
01-07 17:45:33.690: E/AndroidRuntime(8981): at dalvik.system.NativeStart.main(Native Method)
01-07 17:45:35.430: D/Process(8981): killProcess, pid=8981
01-07 17:45:35.430: D/Process(8981): dalvik.system.VMStack.getThreadStackTrace(Native Method)
01-07 17:45:35.430: D/Process(8981): java.lang.Thread.getStackTrace(Thread.java:599)
01-07 17:45:35.430: D/Process(8981): android.os.Process.killProcess(Process.java:1004)
01-07 17:45:35.430: D/Process(8981): com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:123)
01-07 17:45:35.430: D/Process(8981): java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
01-07 17:45:35.430: D/Process(8981): java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)
01-07 17:45:35.430: D/Process(8981): dalvik.system.NativeStart.main(Native Method)
谢谢：）
答案 0 :(得分：3)
你在这里提到了罪魁祸首：
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)
所以基本上你得到了空数组（count=0），但是你试图在第1位获取元素，因此Main_CardGame_Activity.java第346行中的代码引起异常