我无法让阵列显示车或主教（r＆amp; b）。我需要它们显示在King（k），G，s，n，l前面的行上。 案例陈述应该贯穿并绘制棋盘上的所有棋子，但是它只会运行18次，然后崩溃，但我确定我宣布阵列有40件（每个玩家在shogi中以20件开始） 。 案例陈述目前也忽略了案例r和b。
private void setUpNewPieces(){
for (int i = 0; i < 2; i++){
//Sets back row.
pieces[20 * i] = new Piece ('K', i, 4, (8 * i));
pieces[(20 * i) + 1] = new Piece('G', i, 3, (8 * i));
pieces[(20 * i) + 2] = new Piece('s', i, 2, (8 * i));
pieces[(20 * i) + 3] = new Piece('n', i, 1, (8 * i));
pieces[(20 * i) + 4] = new Piece('l', i, 0, (8 * i));
pieces[(20 * i) + 5] = new Piece('G', i, 5, (8 * i));
pieces[(20 * i) + 6] = new Piece('s', i, 6, (8 * i));
pieces[(20 * i) + 7] = new Piece('n', i, 7, (8 * i));
pieces[(20 * i) + 8] = new Piece('l', i, 8, (8 * i));
for (int i3 = 0; i3 < 2; i3++){
pieces[(20 * i) + 9] = new Piece('b', i, i3, (7 * i));
pieces[(20 * i) + 10] = new Piece('r', i, i3, (7 * 1));
}
//Set pawns.
for (int i2 = 0; i2 < 9; i2++){
pieces[(18 * i) + 9 + i2] = new Piece('p', i, i2,(6 * i));
}
Log.d("setUpNewPieces", "pawnDone");
}
Log.d("setUpNewPieces", "nonPawnDone");
}//END private void newPieces()
private void updateBoard(){
Location field;
int x, y;
String theArray;
for(int jkl=0;jkl < pieces.length;jkl++){
theArray = jkl + ": " + String.valueOf(pieces[jkl].type) + "-" + String.valueOf(pieces[jkl].direction);
Log.d("TheArray",theArray);
}
//Draw pieces.
for (int i = 0; i < 40; i++){
field = pieces [i].getLocation();
Log.d("DrawPieces - i",String.valueOf(i));
Log.d("DrawPieces - type",String.valueOf(pieces[i].type));
Log.d("DrawPieces - direction",String.valueOf(pieces[i].direction));
x = field.getX();
y = field.getY();
if(!field.isEmpty()){
switch (pieces[i].direction){
case 0:
Log.d("pieces[i].d...","case0Start");
switch (pieces[i].type){
case 'K':
gameBoardView[x][y].setImageResource(R.drawable.king);
break;
case 'G':
gameBoardView[x][y].setImageResource(R.drawable.gold);
break;
case 's':
gameBoardView[x][y].setImageResource(R.drawable.silver);
break;
case 'S':
gameBoardView[x][y].setImageResource(R.drawable.silver_p);
break;
case 'n':
gameBoardView[x][y].setImageResource(R.drawable.knight);
break;
case 'N':
gameBoardView[x][y].setImageResource(R.drawable.knight_p);
break;
case 'l':
gameBoardView[x][y].setImageResource(R.drawable.lance);
break;
case 'L':
gameBoardView[x][y].setImageResource(R.drawable.lance_p);
break;
case 'b':
gameBoardView[x][y].setImageResource(R.drawable.bishop);
break;
case 'B':
gameBoardView[x][y].setImageResource(R.drawable.bishop_p);
break;
case 'r':
gameBoardView[x][y].setImageResource(R.drawable.rook);
break;
case 'R':
gameBoardView[x][y].setImageResource(R.drawable.rook_p);
break;
case 'p':
gameBoardView[x][y].setImageResource(R.drawable.pawn);
break;
case 'P':
gameBoardView[x][y].setImageResource(R.drawable.pawn_p);
break;
}//END switch (pieces[i].type) WITHIN case 0
Log.d("pieces[i].d...","case0Finish");
break;
case 1:
Log.d("pieces[i].d...","case1Start");
switch (pieces[i].type){
case 'K':
gameBoardView[x][y].setImageResource(R.drawable.king_rot);
break;
case 'G':
gameBoardView[x][y].setImageResource(R.drawable.gold_rot);
break;
case 's':
gameBoardView[x][y].setImageResource(R.drawable.silver_rot);
break;
case 'S':
gameBoardView[x][y].setImageResource(R.drawable.silver_p_rot);
break;
case 'n':
gameBoardView[x][y].setImageResource(R.drawable.knight_rot);
break;
case 'N':
gameBoardView[x][y].setImageResource(R.drawable.knight_p_rot);
break;
case 'l':
gameBoardView[x][y].setImageResource(R.drawable.lance_rot);
break;
case 'L':
gameBoardView[x][y].setImageResource(R.drawable.lance_p_rot);
break;
case 'b':
gameBoardView[x][y].setImageResource(R.drawable.bishop_rot);
break;
case 'B':
gameBoardView[x][y].setImageResource(R.drawable.bishop_p_rot);
break;
case 'r':
gameBoardView[x][y].setImageResource(R.drawable.rook_rot);
break;
case 'R':
gameBoardView[x][y].setImageResource(R.drawable.rook_p_rot);
break;
case 'p':
gameBoardView[x][y].setImageResource(R.drawable.pawn_rot);
break;
case 'P':
gameBoardView[x][y].setImageResource(R.drawable.pawn_p_rot);
break;
}//END switch (pieces[i].type) WITHIN case 1
Log.d("pieces[i].d...","case1Finish");
break;
}//END switch (pieces[i].direction)
Log.d("updateBoardDrawPieces", "drawDone");
}//END if(!field.isEmpty())
}//END for (int i = 0; i < 40; i++)
}//END updateBoard{
以下是完整的错误日志：
03-01 14:59:55.262: DEBUG/AndroidRuntime(579): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
03-01 14:59:55.272: DEBUG/AndroidRuntime(579): CheckJNI is ON
03-01 14:59:55.522: DEBUG/AndroidRuntime(579): --- registering native functions ---
03-01 14:59:56.742: DEBUG/dalvikvm(184): GC_EXPLICIT freed 121 objects / 6392 bytes in 153ms
03-01 14:59:56.852: DEBUG/PackageParser(68): Scanning package: /data/app/vmdl73743.tmp
03-01 14:59:57.242: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 14819 objects / 820272 bytes in 171ms
03-01 14:59:58.022: INFO/PackageManager(68): Removing non-system package:com.coursework.shogi
03-01 14:59:58.022: INFO/ActivityManager(68): Force stopping package com.coursework.shogi uid=10036
03-01 14:59:58.252: DEBUG/PackageManager(68): Scanning package com.coursework.shogi
03-01 14:59:58.252: INFO/PackageManager(68): Package com.coursework.shogi codePath changed from /data/app/com.coursework.shogi-2.apk to /data/app/com.coursework.shogi-1.apk; Retaining data and using new
03-01 14:59:58.272: INFO/PackageManager(68): /data/app/com.coursework.shogi-1.apk changed; unpacking
03-01 14:59:58.322: DEBUG/installd(35): DexInv: --- BEGIN '/data/app/com.coursework.shogi-1.apk' ---
03-01 14:59:58.692: DEBUG/dalvikvm(586): DexOpt: load 64ms, verify 143ms, opt 4ms
03-01 14:59:58.705: DEBUG/installd(35): DexInv: --- END '/data/app/com.coursework.shogi-1.apk' (success) ---
03-01 14:59:58.712: WARN/PackageManager(68): Code path for pkg : com.coursework.shogi changing from /data/app/com.coursework.shogi-2.apk to /data/app/com.coursework.shogi-1.apk
03-01 14:59:58.712: WARN/PackageManager(68): Resource path for pkg : com.coursework.shogi changing from /data/app/com.coursework.shogi-2.apk to /data/app/com.coursework.shogi-1.apk
03-01 14:59:58.712: DEBUG/PackageManager(68): Activities: com.coursework.shogi.Shogi com.coursework.shogi.Instructions com.coursework.shogi.Game com.coursework.shogi.Prefs
03-01 14:59:58.732: INFO/ActivityManager(68): Force stopping package com.coursework.shogi uid=10036
03-01 14:59:58.932: INFO/installd(35): move /data/dalvik-cache/data@app@com.coursework.shogi-1.apk@classes.dex -> /data/dalvik-cache/data@app@com.coursework.shogi-1.apk@classes.dex
03-01 14:59:58.932: DEBUG/PackageManager(68): New package installed in /data/app/com.coursework.shogi-1.apk
03-01 14:59:59.192: INFO/ActivityManager(68): Force stopping package com.coursework.shogi uid=10036
03-01 14:59:59.332: DEBUG/dalvikvm(127): GC_EXPLICIT freed 796 objects / 43384 bytes in 117ms
03-01 14:59:59.742: WARN/RecognitionManagerService(68): no available voice recognition services found
03-01 15:00:00.182: DEBUG/dalvikvm(68): GC_EXPLICIT freed 12265 objects / 682336 bytes in 190ms
03-01 15:00:00.262: DEBUG/dalvikvm(165): GC_EXPLICIT freed 1580 objects / 80600 bytes in 895ms
03-01 15:00:00.342: INFO/installd(35): unlink /data/dalvik-cache/data@app@com.coursework.shogi-2.apk@classes.dex
03-01 15:00:00.372: DEBUG/AndroidRuntime(579): Shutting down VM
03-01 15:00:00.382: DEBUG/dalvikvm(579): Debugger has detached; object registry had 1 entries
03-01 15:00:00.412: INFO/AndroidRuntime(579): NOTE: attach of thread 'Binder Thread #3' failed
03-01 15:00:01.212: DEBUG/AndroidRuntime(592): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
03-01 15:00:01.212: DEBUG/AndroidRuntime(592): CheckJNI is ON
03-01 15:00:01.582: DEBUG/AndroidRuntime(592): --- registering native functions ---
03-01 15:00:02.673: INFO/ActivityManager(68): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.coursework.shogi/.Shogi }
03-01 15:00:02.942: DEBUG/AndroidRuntime(592): Shutting down VM
03-01 15:00:02.973: DEBUG/dalvikvm(592): Debugger has detached; object registry had 1 entries
03-01 15:00:03.052: INFO/AndroidRuntime(592): NOTE: attach of thread 'Binder Thread #3' failed
03-01 15:00:03.104: INFO/ActivityManager(68): Start proc com.coursework.shogi for activity com.coursework.shogi/.Shogi: pid=599 uid=10036 gids={}
03-01 15:00:04.702: INFO/ActivityManager(68): Displayed activity com.coursework.shogi/.Shogi: 1768 ms (total 2033641 ms)
03-01 15:00:07.112: INFO/ActivityManager(68): Starting activity: Intent { cmp=com.coursework.shogi/.Game }
03-01 15:00:07.622: DEBUG/setContentView(599): Called in protected void
03-01 15:00:07.652: DEBUG/setUpObjects(599): setUpGameBoardViewCalled
03-01 15:00:07.682: DEBUG/setUpObjects(599): initialseGridViews
It calls the class 40 times, as I wanted...
03-01 15:00:07.692: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.692: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.692: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.702: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.722: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.722: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.722: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.722: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.734: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.734: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.741: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.741: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.752: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.752: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.752: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.752: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.762: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.762: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.772: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.792: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.792: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.792: DEBUG/publicClassPiece(599): Started
03-01 15:00:07.792: DEBUG/setUpObjects(599): lastMoveInitialised
03-01 15:00:07.792: DEBUG/setUpObjects(599): Called in protected void
03-01 15:00:07.792: DEBUG/setUpNewPieces(599): pawnDone
03-01 15:00:07.792: DEBUG/setUpNewPieces(599): pawnDone
03-01 15:00:07.792: DEBUG/setUpNewPieces(599): nonPawnDone
03-01 15:00:07.792: DEBUG/setUpNewPieces(599): Called in protected void
Here TheArray is only called 18 times, I was told this is because I only have 18 spaces in the array, and it then crashes because there is no more room. It calls the back row of pieces and the pawns, ignoring the rook and bishop; and never getting to the second player
(Sorry if I repeated myself, but i thought this may help).
03-01 15:00:07.792: DEBUG/TheArray(599): 0: K-0
03-01 15:00:07.792: DEBUG/TheArray(599): 1: G-0
03-01 15:00:07.792: DEBUG/TheArray(599): 2: s-0
03-01 15:00:07.792: DEBUG/TheArray(599): 3: n-0
03-01 15:00:07.792: DEBUG/TheArray(599): 4: l-0
03-01 15:00:07.792: DEBUG/TheArray(599): 5: G-0
03-01 15:00:07.792: DEBUG/TheArray(599): 6: s-0
03-01 15:00:07.792: DEBUG/TheArray(599): 7: n-0
03-01 15:00:07.792: DEBUG/TheArray(599): 8: l-0
03-01 15:00:07.792: DEBUG/TheArray(599): 9: p-0
03-01 15:00:07.792: DEBUG/TheArray(599): 10: p-0
03-01 15:00:07.792: DEBUG/TheArray(599): 11: p-0
03-01 15:00:07.792: DEBUG/TheArray(599): 12: p-0
03-01 15:00:07.792: DEBUG/TheArray(599): 13: p-0
03-01 15:00:07.792: DEBUG/TheArray(599): 14: p-0
03-01 15:00:07.802: DEBUG/TheArray(599): 15: p-0
03-01 15:00:07.802: DEBUG/TheArray(599): 16: p-0
03-01 15:00:07.802: DEBUG/TheArray(599): 17: p-0
03-01 15:00:07.802: DEBUG/AndroidRuntime(599): Shutting down VM
03-01 15:00:07.802: WARN/dalvikvm(599): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): FATAL EXCEPTION: main
03-01 15:00:07.852: ERROR/AndroidRuntime(599): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.coursework.shogi/com.coursework.shogi.Game}: java.lang.NullPointerException
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.os.Handler.dispatchMessage(Handler.java:99)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.os.Looper.loop(Looper.java:123)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at java.lang.reflect.Method.invoke(Method.java:521)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at dalvik.system.NativeStart.main(Native Method)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): Caused by: java.lang.NullPointerException
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at com.coursework.shogi.Game$Piece.access$0(Game.java:72)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at com.coursework.shogi.Game.updateBoard(Game.java:434)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at com.coursework.shogi.Game.onCreate(Game.java:30)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-01 15:00:07.852: ERROR/AndroidRuntime(599): ... 11 more
03-01 15:00:07.904: WARN/ActivityManager(68): Force finishing activity com.coursework.shogi/.Game
03-01 15:00:07.912: WARN/ActivityManager(68): Force finishing activity com.coursework.shogi/.Shogi
03-01 15:00:08.413: WARN/ActivityManager(68): Activity pause timeout for HistoryRecord{45009650 com.coursework.shogi/.Game}
03-01 15:00:14.871: DEBUG/dalvikvm(184): GC_EXPLICIT freed 163 objects / 11848 bytes in 158ms
03-01 15:00:19.523: WARN/ActivityManager(68): Activity destroy timeout for HistoryRecord{44ff8a00 com.coursework.shogi/.Shogi}
03-01 15:00:19.523: WARN/ActivityManager(68): Activity destroy timeout for HistoryRecord{45009650 com.coursework.shogi/.Game}
03-01 15:00:19.912: DEBUG/dalvikvm(262): GC_EXPLICIT freed 47 objects / 2264 bytes in 154ms
以下是各个部分的课程：
public class Piece {
/**Type List:
* K = King
* G = Gold General
* s = Silver General
* S = Promoted Silver
* n = Knight
* N = Promoted Knight
* l = Lance
* L = Promoted Lance
* b = Bishop
* B = Dragon Horse (Promoted Bishop)
* r = Rook
* R = Dragon (Promoted Rook)
* p = Pawn
* P = Token (Promoted Pawn)
*/
private char type;//see above for the variables used for the types of piece..
private int direction;//0 = black/gote, 1 = white/sente.
private Location field = new Location();
private boolean moved;
private boolean onBoard;//if false, the piece will be in a token reservoir.
//private bool onBoard not implemented
public Piece(char setType, int setDirection, int setX, int setY){
this.type = setType;
this.direction = setDirection;
this.field.setX(setX);
this.field.setY(setY);
this.moved = false;
this.onBoard = true;
}
public Piece(){
this.type = 'K';
this.direction = 0;
this.field.empty();
this.moved = false;
this.onBoard = true;
}
public void copyFrom(Piece p){
type = p.getType();
direction = p.getDirection();
field.setX(p.getLocation().getX());
field.setY(p.getLocation().getY());
}
public Location getLocation(){
return field;
}
public void setLocation(int x, int y, boolean move){
field.setX(x);
field.setY(y);
if (move){
moved = true;
}
}
public int getX(){
return field.getX();
}
public int getY(){
return field.getY();
}
public void setX(int x){
field.setX(x);
}
public void setY(int y){
field.setY(y);
}
public boolean compareLocation(Location l){
return field.equals(l);
}
public boolean compareLocation(int x, int y){
return ((x == field.getX()) && (y == field.getY()));
}
public int getDirection(){
return direction;
}
public void setDirection(int i){
direction = i;
}
public char getType(){
return type;
}
public void setType(int i){
type = (char) i;
}
public boolean hasMoved(){
return moved;
}
public void setMoved(byte b){
moved = (b == 1);
}
}//END public class Piece
答案 0 :(得分：0)
应该这样：
pieces[(20 * i) + 10] = new Piece('r', i, i3, (7 * 1));
是这样的：
pieces[(20 * i) + 10] = new Piece('r', i, i3, (7 * i));
另外，0到10的部分都会被pieces输入，但是你会用这些棋子覆盖9和10（你的b和r部分）。
建议，为什么不创建int pieceNum然后使用：
pieces[pieceNum++] = ...
而不是计算偏移量。
我甚至没有看你的构造函数args，因为你没有发布那个类。计算pieces数组的偏移量时存在足够的问题。
在这段代码的第一遍中（当你的外部i变量= 1时），查看OFFSET（在评论中）：
pieces[20 * i] = new Piece ('K', i, 4, (8 * i)); // OFFSET = 0
pieces[(20 * i) + 1] = new Piece('G', i, 3, (8 * i)); // OFFSET = 1
pieces[(20 * i) + 2] = new Piece('s', i, 2, (8 * i)); // OFFSET = 2
pieces[(20 * i) + 3] = new Piece('n', i, 1, (8 * i)); // OFFSET = 3
pieces[(20 * i) + 4] = new Piece('l', i, 0, (8 * i)); // OFFSET = 4
pieces[(20 * i) + 5] = new Piece('G', i, 5, (8 * i)); // OFFSET = 5
pieces[(20 * i) + 6] = new Piece('s', i, 6, (8 * i)); // OFFSET = 6
pieces[(20 * i) + 7] = new Piece('n', i, 7, (8 * i)); // OFFSET = 7
pieces[(20 * i) + 8] = new Piece('l', i, 8, (8 * i)); // OFFSET = 8
for (int i3 = 0; i3 < 2; i3++){
pieces[(20 * i) + 9] = new Piece('b', i, i3, (7 * i)); // OFFSET = 9 for both bishops, the 2nd overwrites the 1st
pieces[(20 * i) + 10] = new Piece('r', i, i3, (7 * 1)); // OFFSET = 10 for both rooks, the 2nd overwrites the 1st
}
for (int i2 = 0; i2 < 9; i2++){
pieces[(18 * i) + 9 + i2] = new Piece('p', i, i2,(6 * i)); // OFFSET = 9 thru 16, overwriting the bishop and rook set above
}