android studio数据下标越界问题
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public class TrendGraphView extends View {
/**
* 趋势图的高度
*/
private int viewHeight;
/**
* 趋势图的宽度
*/
private int viewWidth;
/**
* 最低温度
*/
private int minTemp;
/**
* 最高温度
*/
private int maxTemp;
/**
* 每度的单位长度
*/
int mSpace;
int[] dx = new int[4];
private ArrayList<Integer> mTopTemp;
private ArrayList<Integer> mLowTemp;
private Paint mPointPaint;
private Paint mPoint2Paint;
private Paint mLine1Paint;
private Paint mline2Paint;
private Paint mTextPaint;
private Paint mPath1Paint;
private Paint mPath2Paint;
public TrendGraphView(Context context) {
super(context);
}
public TrendGraphView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
mTopTemp = new ArrayList<Integer>();
mTopTemp.add(10);
mTopTemp.add(11);
mTopTemp.add(12);
mTopTemp.add(15);
mLowTemp = new ArrayList<Integer>();
mLowTemp.add(4);
mLowTemp.add(5);
mLowTemp.add(6);
mLowTemp.add(9);
init();
}
public void setTemperature(ArrayList<Integer> top, ArrayList<Integer> low){
this.mTopTemp = top;
this.mLowTemp = low;
postInvalidate();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(measureWidth(widthMeasureSpec),
measureHeight(heightMeasureSpec));
}
private int measureHeight(int heightMeasureSpec) {
int result = 0;
int specMode = MeasureSpec.getMode(heightMeasureSpec);
int specSize = MeasureSpec.getSize(heightMeasureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
result = getPaddingBottom() + getPaddingTop();
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
private int measureWidth(int widthMeasureSpec) {
int result = 0;
int size = MeasureSpec.getSize(widthMeasureSpec); // 每次调用此方法，测量用到的size会发生变化
int mode = MeasureSpec.getMode(widthMeasureSpec); // 根据定义的Layout_width,Layout_height，会对此值产生影响
if (mode == MeasureSpec.EXACTLY) {
result = size;
} else if (mode == MeasureSpec.UNSPECIFIED) {
result = getPaddingLeft() + getPaddingRight();
} else {
result = Math.min(result, size);
}
System.out.println("Height size:" + size);
System.out.println("Height mode:" + mode);
return result;
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
viewHeight = getHeight();
viewWidth = getWidth();
Log.i("icer", viewHeight + "");
Log.i("icer", viewWidth + "");
spaceHeightWidth();
FontMetrics fontMetrics = mTextPaint.getFontMetrics();
// 计算文字高度
float fontHeight = fontMetrics.bottom - fontMetrics.top;
Path path = new Path();
Path path2=new Path();
for (int i = 0; i < mTopTemp.size(); i++) {
int _hTop = (maxTemp - mTopTemp.get(i) + 2) * mSpace + 30;
if (i < mTopTemp.size() - 1) {
canvas.drawLine(dx[i], _hTop, dx[i + 1],
(maxTemp - mTopTemp.get(i + 1) + 2) * mSpace + 30,
mLine1Paint);
}
if(i==0){
path.moveTo(dx[0], _hTop);
path2.moveTo(dx[0], _hTop);
}
if(i==1){
path2.lineTo(dx[i], _hTop);
}
path.lineTo(dx[i], _hTop);
canvas.drawText(mTopTemp.get(i) + "", dx[i], _hTop - fontHeight
, mTextPaint);
canvas.drawCircle(dx[i], _hTop, 10, mPointPaint);
}
for (int i = mLowTemp.size() - 1; i >= 0; i--) {
int _hLow = (maxTemp - mLowTemp.get(i) + 2) * mSpace + 30;
if (i > 0) {
canvas.drawLine(dx[i], _hLow, dx[i - 1],
(maxTemp - mLowTemp.get(i - 1) + 2) * mSpace + 30,
mline2Paint);
}
if(i==1){
path2.lineTo(dx[i], _hLow);
}
if(i==0){
path2.lineTo(dx[i], _hLow);
}
path.lineTo(dx[i], _hLow);
canvas.drawText(mLowTemp.get(i) + "", dx[i], _hLow + fontHeight*3/2,
mTextPaint);
canvas.drawCircle(dx[i], _hLow, 10, mPoint2Paint);
}
path.close();
path2.close();
canvas.drawPath(path, mPath1Paint);
canvas.drawPath(path2, mPath2Paint);
}
private void spaceHeightWidth() {
minTemp = Collections.min(mLowTemp);
maxTemp = Collections.max(mTopTemp);
int h = maxTemp - minTemp;
System.out.println("温差：" + h);
if (h < 20) {
mSpace = (viewHeight - 30) / (h + 4);
} else {
mSpace = (viewHeight - 30) / (h + 10);
}
dx[0] = viewWidth * 1 / 12;
dx[1] = viewWidth * 4 / 12;
dx[2] = viewWidth * 7 / 12;
dx[3] = viewWidth * 10 / 12;
// dx[4] = viewWidth * 9 / 12;
// dx[5] = viewWidth * 11 / 12;
}
/**
* 得到最高温度
*
* @param topTemp
* @return
*/
private int getMaxiTemperature(int[] topTemp) {
return getMaxByBubbleSort(topTemp);
}
/**
* 得到最低温度
*
* @param lowTemp
* @return
*/
private int getMiniTemperature(int[] lowTemp) {
return getMinByBubbleSort(lowTemp);
}
}
错误日志 ：
Process: com.amap.navi.demo, PID: 10334
java.lang.ArrayIndexOutOfBoundsException: length=4; index=4
at com.amap.navi.demo.util.TrendGraphView.onDraw(TrendGraphView.java:198)
at android.view.View.draw(View.java:14497)
at android.view.View.getDisplayList(View.java:13394)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)
at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2438)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2310)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1940)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1057)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5666)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5072)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
03-23 15:28:39.332 1139-1314/? A/ActivityManager: Service ServiceRecord{4401bae8 u0 com.amap.navi.demo/com.amap.api.location.APSService} in process ProcessRecord{43119738 10334:com.amap.navi.demo/u0a200} not same as in map: null
/**
* 趋势图的高度
*/
private int viewHeight;
/**
* 趋势图的宽度
*/
private int viewWidth;
/**
* 最低温度
*/
private int minTemp;
/**
* 最高温度
*/
private int maxTemp;
/**
* 每度的单位长度
*/
int mSpace;
int[] dx = new int[4];
private ArrayList<Integer> mTopTemp;
private ArrayList<Integer> mLowTemp;
private Paint mPointPaint;
private Paint mPoint2Paint;
private Paint mLine1Paint;
private Paint mline2Paint;
private Paint mTextPaint;
private Paint mPath1Paint;
private Paint mPath2Paint;
public TrendGraphView(Context context) {
super(context);
}
public TrendGraphView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
mTopTemp = new ArrayList<Integer>();
mTopTemp.add(10);
mTopTemp.add(11);
mTopTemp.add(12);
mTopTemp.add(15);
mLowTemp = new ArrayList<Integer>();
mLowTemp.add(4);
mLowTemp.add(5);
mLowTemp.add(6);
mLowTemp.add(9);
init();
}
public void setTemperature(ArrayList<Integer> top, ArrayList<Integer> low){
this.mTopTemp = top;
this.mLowTemp = low;
postInvalidate();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(measureWidth(widthMeasureSpec),
measureHeight(heightMeasureSpec));
}
private int measureHeight(int heightMeasureSpec) {
int result = 0;
int specMode = MeasureSpec.getMode(heightMeasureSpec);
int specSize = MeasureSpec.getSize(heightMeasureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
result = getPaddingBottom() + getPaddingTop();
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
private int measureWidth(int widthMeasureSpec) {
int result = 0;
int size = MeasureSpec.getSize(widthMeasureSpec); // 每次调用此方法，测量用到的size会发生变化
int mode = MeasureSpec.getMode(widthMeasureSpec); // 根据定义的Layout_width,Layout_height，会对此值产生影响
if (mode == MeasureSpec.EXACTLY) {
result = size;
} else if (mode == MeasureSpec.UNSPECIFIED) {
result = getPaddingLeft() + getPaddingRight();
} else {
result = Math.min(result, size);
}
System.out.println("Height size:" + size);
System.out.println("Height mode:" + mode);
return result;
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
viewHeight = getHeight();
viewWidth = getWidth();
Log.i("icer", viewHeight + "");
Log.i("icer", viewWidth + "");
spaceHeightWidth();
FontMetrics fontMetrics = mTextPaint.getFontMetrics();
// 计算文字高度
float fontHeight = fontMetrics.bottom - fontMetrics.top;
Path path = new Path();
Path path2=new Path();
for (int i = 0; i < mTopTemp.size(); i++) {
int _hTop = (maxTemp - mTopTemp.get(i) + 2) * mSpace + 30;
if (i < mTopTemp.size() - 1) {
canvas.drawLine(dx[i], _hTop, dx[i + 1],
(maxTemp - mTopTemp.get(i + 1) + 2) * mSpace + 30,
mLine1Paint);
}
if(i==0){
path.moveTo(dx[0], _hTop);
path2.moveTo(dx[0], _hTop);
}
if(i==1){
path2.lineTo(dx[i], _hTop);
}
path.lineTo(dx[i], _hTop);
canvas.drawText(mTopTemp.get(i) + "", dx[i], _hTop - fontHeight
, mTextPaint);
canvas.drawCircle(dx[i], _hTop, 10, mPointPaint);
}
for (int i = mLowTemp.size() - 1; i >= 0; i--) {
int _hLow = (maxTemp - mLowTemp.get(i) + 2) * mSpace + 30;
if (i > 0) {
canvas.drawLine(dx[i], _hLow, dx[i - 1],
(maxTemp - mLowTemp.get(i - 1) + 2) * mSpace + 30,
mline2Paint);
}
if(i==1){
path2.lineTo(dx[i], _hLow);
}
if(i==0){
path2.lineTo(dx[i], _hLow);
}
path.lineTo(dx[i], _hLow);
canvas.drawText(mLowTemp.get(i) + "", dx[i], _hLow + fontHeight*3/2,
mTextPaint);
canvas.drawCircle(dx[i], _hLow, 10, mPoint2Paint);
}
path.close();
path2.close();
canvas.drawPath(path, mPath1Paint);
canvas.drawPath(path2, mPath2Paint);
}
private void spaceHeightWidth() {
minTemp = Collections.min(mLowTemp);
maxTemp = Collections.max(mTopTemp);
int h = maxTemp - minTemp;
System.out.println("温差：" + h);
if (h < 20) {
mSpace = (viewHeight - 30) / (h + 4);
} else {
mSpace = (viewHeight - 30) / (h + 10);
}
dx[0] = viewWidth * 1 / 12;
dx[1] = viewWidth * 4 / 12;
dx[2] = viewWidth * 7 / 12;
dx[3] = viewWidth * 10 / 12;
// dx[4] = viewWidth * 9 / 12;
// dx[5] = viewWidth * 11 / 12;
}
/**
* 得到最高温度
*
* @param topTemp
* @return
*/
private int getMaxiTemperature(int[] topTemp) {
return getMaxByBubbleSort(topTemp);
}
/**
* 得到最低温度
*
* @param lowTemp
* @return
*/
private int getMiniTemperature(int[] lowTemp) {
return getMinByBubbleSort(lowTemp);
}
}
错误日志 ：
Process: com.amap.navi.demo, PID: 10334
java.lang.ArrayIndexOutOfBoundsException: length=4; index=4
at com.amap.navi.demo.util.TrendGraphView.onDraw(TrendGraphView.java:198)
at android.view.View.draw(View.java:14497)
at android.view.View.getDisplayList(View.java:13394)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
at android.view.View.getDisplayList(View.java:13332)
at android.view.View.getDisplayList(View.java:13436)
at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)
at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2438)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2310)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1940)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1057)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5666)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5072)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
03-23 15:28:39.332 1139-1314/? A/ActivityManager: Service ServiceRecord{4401bae8 u0 com.amap.navi.demo/com.amap.api.location.APSService} in process ProcessRecord{43119738 10334:com.amap.navi.demo/u0a200} not same as in map: null
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