我正在开发一个需要行和列按钮的游戏。我真的无法弄清楚我的代码中是如何发生ArrayIndexOutOfBound异常的。帮我找出错误。谢谢你
这是我的XML视图
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tl1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="0,2"
android:background="@drawable/game"
android:alpha="20" >
<TableRow
android:id="@+id/tr1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/tvNoOfMines"
android:layout_height="100dp"
android:layout_column="0"
android:gravity="center"
android:text="000" >
</TextView>
<ImageButton
android:id="@+id/ibSmiley"
android:layout_height="wrap_content"
android:layout_column="1"
android:background="@drawable/custom_reaction" >
</ImageButton>
<TextView
android:id="@+id/tvTimer"
android:layout_height="100dp"
android:layout_column="2"
android:gravity="center"
android:text="000" >
</TextView>
</TableRow>
<TableRow
android:id="@+id/tr2"
android:layout_width="match_parent"
android:layout_height="50dp" >
</TableRow>
<TableRow android:id="@+id/tr3" >
<TableLayout
android:id="@+id/tlMineFields"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_span="3"
android:stretchColumns="*"
android:scrollbars="vertical"
android:scrollbarAlwaysDrawVerticalTrack="true"
android:padding="5dp">
</TableLayout>
</TableRow>
</TableLayout>
这是我访问按钮数组的代码的一部分
private void createMineFields() {
// TODO Auto-generated method stub
buttonBlock = new ButtonBlock[noOfMineFields][noOfMineFields];
for(int i=0;i<noOfMineFields;i++){
for(int j=0;j<noOfMineFields;j++){
buttonBlock[i][j]=new ButtonBlock(this);
buttonBlock[i][j].setOnClickListener(this);
buttonBlock[i][j].setOnLongClickListener(this);
}
}
}
private void placeMineFields() {
// TODO Auto-generated method stub
for (int i = 0; i < noOfMineFields; i++) {
tablerow = new TableRow(this);
tablerow.setLayoutParams(new LayoutParams(blockWidth
+ (2 * blockPadding) * noOfMineFields, blockHeight
+ (2 * blockPadding)));
//tablerow.setPadding(blockPadding, blockPadding, blockPadding, blockPadding);
for (int j = 0; j < noOfMineFields; j++) {
buttonBlock[i][j].setLayoutParams(new LayoutParams(blockWidth
+ (2 * blockPadding) * noOfMineFields, blockHeight
+ (2 * blockPadding)));
buttonBlock[i][j].setPadding(blockPadding, blockPadding, blockPadding, blockPadding);
String createId = "" + (i + 1) + "" + j;
buttonBlock[i][j].setId(Integer.parseInt(createId));
tablerow.addView(buttonBlock[i][j]);
}
tablelayout.addView(tablerow,new TableLayout.LayoutParams(blockWidth
+ (2 * blockPadding) * noOfMineFields, blockHeight
+ (2 * blockPadding)));
}
}
我首先调用createMineFields（）字段，然后调用placeMineFields（）。我是android和编程的新手。请帮我弄清楚ArrayIndexOutOfBound异常发生的位置和方式。
这是在LogCat中发布的错误
01-18 23:12:54.805: D/dalvikvm(2766): GC_EXTERNAL_ALLOC freed 52K, 53% free 2562K/5379K, external 1625K/2137K, paused 59ms
01-18 23:13:52.445: D/dalvikvm(2766): GC_EXTERNAL_ALLOC freed 8K, 52% free 2583K/5379K, external 2525K/3154K, paused 33ms
01-18 23:13:52.615: D/AndroidRuntime(2766): Shutting down VM
01-18 23:13:52.615: W/dalvikvm(2766): threadid=1: thread exiting with uncaught exception (group=0x40015560)
01-18 23:13:52.625: E/AndroidRuntime(2766): FATAL EXCEPTION: main
01-18 23:13:52.625: E/AndroidRuntime(2766): java.lang.RuntimeException: Unable to start activity ComponentInfo{btdw.agilan.minesweeper/btdw.agilan.minesweeper.Game}: java.lang.ArrayIndexOutOfBoundsException
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.os.Handler.dispatchMessage(Handler.java:99)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.os.Looper.loop(Looper.java:123)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread.main(ActivityThread.java:3683)
01-18 23:13:52.625: E/AndroidRuntime(2766): at java.lang.reflect.Method.invokeNative(Native Method)
01-18 23:13:52.625: E/AndroidRuntime(2766): at java.lang.reflect.Method.invoke(Method.java:507)
01-18 23:13:52.625: E/AndroidRuntime(2766): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-18 23:13:52.625: E/AndroidRuntime(2766): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-18 23:13:52.625: E/AndroidRuntime(2766): at dalvik.system.NativeStart.main(Native Method)
01-18 23:13:52.625: E/AndroidRuntime(2766): Caused by: java.lang.ArrayIndexOutOfBoundsException
01-18 23:13:52.625: E/AndroidRuntime(2766): at btdw.agilan.minesweeper.Game.placeMineFields(Game.java:115)
01-18 23:13:52.625: E/AndroidRuntime(2766): at btdw.agilan.minesweeper.Game.onCreate(Game.java:58)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-18 23:13:52.625: E/AndroidRuntime(2766): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
01-18 23:13:52.625: E/AndroidRuntime(2766): ... 11 more
这是我调用createminefields（）和placeminefields（）
的代码 @Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.mine);
initialize();
placeMineFields();
}
private void initialize() {
// TODO Auto-generated method stub
createMineFields();
time = (TextView) findViewById(R.id.tvTimer);
tablelayout = (TableLayout) findViewById(R.id.tlMineFields);
tvNoOfMines=(TextView) findViewById(R.id.tvNoOfMines);
currentTime=0;
check=0;
isMineClicked = false;
isClickedFirst = false;
blockWidth = 10;
blockHeight = 10;
blockPadding = 5;
noOfMineFields = 6;
noOfMines = 1;
noOfSafeFields=(noOfMineFields*noOfMineFields)-noOfMines;
mineArray = new int[noOfMineFields][noOfMineFields];
for (int i = 0; i < noOfMineFields; i++)
for (int j = 0; j < noOfMineFields; j++)
mineArray[i][j] = 0;
mineWeight = new int[noOfMineFields][noOfMineFields];
for (int i = 0; i < noOfMineFields; i++)
for (int j = 0; j < noOfMineFields; j++)
mineWeight[i][j] = 0;
tablerow = new TableRow(this);
timer= new Handler();
timeElasped=new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
check=System.currentTimeMillis();
currentTime++;
time.setText(""+currentTime);
timer.postAtTime(this, check);
timer.postDelayed(timeElasped, 1000);
}
};
tvNoOfMines.setText(""+noOfMines);
}
答案 0 :(得分：0)
知道您的异常来自：
buttonBlock[i][j].setLayoutParams(new LayoutParams(blockWidth+(2*blockPadding)*noOfMineFields,blockHeight +(2*blockPadding)));
您获得的例外情况可能是因为i数组中未初始化任何j和buttonBlock组合。我建议在代码中为每个循环迭代添加Log元素，看看问题出在哪里（同时打印数组的当前大小可能会有所帮助）。
答案 1 :(得分：0)
我看到的问题是，在调用noOfMineFields函数之前，您没有为createMineFields()变量设置固定值。我假设它是一个全局变量，但你不知道调用createMineFileds()时它所拥有的值（最有可能是0，因为它是默认的基于数字的值）。然后，当您致电placeMineFields()时，noOfMineFields设置为6，因此超出了数组的范围（假设它最初是0）