当我在模拟器中运行应用程序时，它运行良好，但在设备中崩溃了。
当我打开 Activity 并调用ondraw方法时
我发现Invalidate();是问题所在:
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
getinfoGFX.open();
String d = "";
semesterNo = getinfoGFX.getDataSemestersNo(s);
semestrYear = getinfoGFX.getDataSemestersYear(s);
semestrId = getinfoGFX.getDataSemestersID(s);
LastGPA = getinfoGFX.getDataLastGPA(s);
LastHourse = getinfoGFX.getDataLastHourse(s);
Type = getinfoGFX.getGPAType(s);
subAllGrades = getinfoGFX.getdataAllSubjectsGrades(semestrId);
subAllHourse = getinfoGFX.getdataAllSubjectsHourse(semestrId);
pText1.setColor(Color.BLACK);
pText1.setTextSize(35);
pText1.setTextAlign(Align.CENTER);
pText1.setTypeface(font);
pText1.setStyle(Paint.Style.STROKE);
pText1.setStrokeWidth(5);
pText2.setColor(Color.BLACK);
pText2.setTextAlign(Align.CENTER);
pText2.setTypeface(font);
pText2.setTextSize(35);
pText2.setColor(Color.WHITE);
pText2.setStrokeWidth(0);
pText3.setColor(Color.BLACK);
pText3.setTextSize(35);
pText3.setTextAlign(Align.RIGHT);
pText3.setTypeface(font);
pText3.setStyle(Paint.Style.STROKE);
pText3.setStrokeWidth(5);
pText4.setColor(Color.BLACK);
pText4.setTextAlign(Align.RIGHT);
pText4.setTypeface(font);
pText4.setTextSize(35);
pText4.setColor(Color.WHITE);
pText4.setStrokeWidth(0);
rect1.setColor(Color.rgb(79, 129, 189));
rect1.setStrokeWidth(0);
rect1.setStyle(Paint.Style.FILL_AND_STROKE);
rect2.setColor(Color.BLACK);
rect2.setStrokeWidth(0);
rect2.setStyle(Paint.Style.FILL_AND_STROKE);
int count = 0;
canvas.drawColor(Color.alpha(0));
dy-=10;
canvas.translate(0, dy);
for (int i = 0; i < semesterNo.length; i++) {
float height = (getMeasuredHeight() / 8);
float startY = (getMeasuredHeight() / 8) * count;
float semYearStartX = getMeasuredWidth() / 4, semYearStartY = startY, semYearEndX = semYearStartX
+ semYearStartX + semYearStartX, semYearEndY = semYearStartY
+ height;
float semNoStartX = 0, semNoStartY = semYearEndY, semNoEndX = getMeasuredWidth(), semNoEndY = semNoStartY
+ height;
float GradeStartX = 0, GradeStartY = semNoEndY, GradeEndX = getMeasuredWidth() / 4, GradeEndY = GradeStartY
+ height;
float HourseStartX = GradeEndX, HourseStartY = semNoEndY, HourseEndX = getMeasuredWidth() / 2, HourseEndY = GradeStartY
+ height;
float SubNameStartX = HourseEndX, SubNameStartY = semNoEndY, SubNameEndX = getMeasuredWidth(), SubNameEndY = GradeStartY
+ height;
canvas.drawRect(GradeStartX, GradeStartY, GradeEndX, GradeEndY,
rect2);
canvas.drawRect(GradeStartX + 3, GradeStartY + 3, GradeEndX - 3,
GradeEndY - 3, rect1);
canvas.drawRect(HourseStartX, HourseStartY, HourseEndX, HourseEndY,
rect2);
canvas.drawRect(HourseStartX + 3, HourseStartY + 3, HourseEndX - 3,
HourseEndY - 3, rect1);
canvas.drawRect(SubNameStartX, SubNameStartY, SubNameEndX,
SubNameEndY, rect2);
canvas.drawRect(SubNameStartX + 3, SubNameStartY + 3,
SubNameEndX - 3, SubNameEndY - 3, rect1);
canvas.drawRect(semNoStartX, semNoStartY, semNoEndX, semNoEndY,
rect2);
canvas.drawRect(semNoStartX + 3, semNoStartY + 3, semNoEndX - 3,
semNoEndY - 3, rect1);
canvas.drawRect(semYearStartX, semYearStartY, semYearEndX,
semYearEndY, rect2);
canvas.drawRect(semYearStartX + 3, semYearStartY + 3,
semYearEndX - 3, semYearEndY - 3, rect1);
canvas.drawText("السنة رقم" + semestrYear[i],
(semYearEndX + semYearStartX) / 2,
(semYearEndY + semYearStartY) / 2, pText1);
canvas.drawText("السنة رقم" + semestrYear[i],
(semYearEndX + semYearStartX) / 2,
(semYearEndY + semYearStartY) / 2, pText2);
canvas.drawText("الفصل الدراسي " + semesterNo[i], semNoEndX,
(semNoStartY + semNoEndY) / 2, pText3);
canvas.drawText("الفصل الدراسي " + semesterNo[i], semNoEndX,
(semNoStartY + semNoEndY) / 2, pText4);
canvas.drawText("الدرجة", (GradeStartX + GradeEndX) / 2,
(GradeStartY + GradeEndY) / 2 + 15, pText1);
canvas.drawText("الدرجة", (GradeStartX + GradeEndX) / 2,
(GradeStartY + GradeEndY) / 2 + 15, pText2);
canvas.drawText("الساعات", (HourseEndX + HourseStartX) / 2,
(HourseEndY + HourseStartY) / 2 + 15, pText1);
canvas.drawText("الساعات", (HourseEndX + HourseStartX) / 2,
(HourseEndY + HourseStartY) / 2 + 15, pText2);
canvas.drawText("اسم المادة", (SubNameEndX + SubNameStartX) / 2,
(SubNameEndY + SubNameStartY) / 2 + 15, pText1);
canvas.drawText("اسم المادة", (SubNameEndX + SubNameStartX) / 2,
(SubNameEndY + SubNameStartY) / 2 + 15, pText2);
subjectsId = getinfoGFX.getdataSubjectsID(semestrId[i]);
semesterF = getinfoGFX.getdataSemesterIdF(semestrId[i]);
subName = getinfoGFX.getdataSubjectsName(semestrId[i]);
subHourse = getinfoGFX.getdataSubjectsHourse(semestrId[i]);
subGrades = getinfoGFX.getdataSubjectsGrades(semestrId[i]);
count++;
for (int k = 0; k < subName.length; k++) {
startY = (getMeasuredHeight() / 8) * count;
semYearStartX = getMeasuredWidth() / 4;
semYearStartY = startY;
semYearEndX = semYearStartX + semYearStartX + semYearStartX;
semYearEndY = semYearStartY + height;
semNoStartX = 0;
semNoStartY = semYearEndY;
semNoEndX = getMeasuredWidth();
semNoEndY = semNoStartY+ height;
GradeStartX = 0;
GradeStartY = semNoEndY;
GradeEndX = getMeasuredWidth() / 4;
GradeEndY = GradeStartY+ height;
HourseStartX = GradeEndX;
HourseStartY = semNoEndY;
HourseEndX = getMeasuredWidth() / 2;
HourseEndY = GradeStartY + height;
SubNameStartX = HourseEndX;
SubNameStartY = semNoEndY;
SubNameEndX = getMeasuredWidth();
SubNameEndY = GradeStartY+ height;
canvas.drawRect(GradeStartX, GradeStartY, GradeEndX, GradeEndY,
rect2);
canvas.drawRect(GradeStartX + 3, GradeStartY + 3, GradeEndX - 3,
GradeEndY - 3, rect1);
canvas.drawRect(HourseStartX, HourseStartY, HourseEndX, HourseEndY,
rect2);
canvas.drawRect(HourseStartX + 3, HourseStartY + 3, HourseEndX - 3,
HourseEndY - 3, rect1);
canvas.drawRect(SubNameStartX, SubNameStartY, SubNameEndX,
SubNameEndY, rect2);
canvas.drawRect(SubNameStartX + 3, SubNameStartY + 3,
SubNameEndX - 3, SubNameEndY - 3, rect1);
canvas.drawText(subGrades[k], (GradeStartX + GradeEndX) / 2,
(GradeStartY + GradeEndY) / 2 + 15, pText1);
canvas.drawText(subGrades[k], (GradeStartX + GradeEndX) / 2,
(GradeStartY + GradeEndY) / 2 + 15, pText2);
canvas.drawText(subHourse[k], (HourseEndX + HourseStartX) / 2,
(HourseEndY + HourseStartY) / 2 + 15, pText1);
canvas.drawText(subHourse[k], (HourseEndX + HourseStartX) / 2,
(HourseEndY + HourseStartY) / 2 + 15, pText2);
canvas.drawText(subName[k], (SubNameEndX + SubNameStartX) / 2,
(SubNameEndY + SubNameStartY) / 2 + 15, pText1);
canvas.drawText(subName[k], (SubNameEndX + SubNameStartX) / 2,
(SubNameEndY + SubNameStartY) / 2 + 15, pText2);
count++;
}
count+=subName.length+1;
}
getinfoGFX.close();
canvas.drawText(LastGPA, getMeasuredWidth()/2, getMeasuredHeight()/2, pText1);
canvas.drawText(LastGPA, getMeasuredWidth()/2, getMeasuredHeight()/2, pText2);
invalidate();
super.onDraw(canvas);
}
当我删除
invalidate();行时，它不会崩溃，但我的应用程序中需要它。更新:这是错误日志
12-15 13:25:17.765: E/AndroidRuntime(4096): FATAL EXCEPTION: main
12-15 13:25:17.765: E/AndroidRuntime(4096): android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed. # Open Cursors=752 (# cursors opened by this proc=752)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.CursorWindow.<init>(CursorWindow.java:108)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.CursorWindow.<init>(CursorWindow.java:100)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.sqlite.SQLiteCursor.clearOrCreateWindow(SQLiteCursor.java:289)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:139)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:196)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:236)
12-15 13:25:17.765: E/AndroidRuntime(4096): at com.example.gpa.dataBase.getdataSemesterIdF(dataBase.java:453)
12-15 13:25:17.765: E/AndroidRuntime(4096): at com.example.gpa.semestersGFX.onDraw(semestersGFX.java:162)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.draw(View.java:13767)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12718)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12762)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3151)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12654)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12762)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3151)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12654)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12762)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3151)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12654)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12762)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3151)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12654)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.View.getDisplayList(View.java:12762)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1144)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewRootImpl.draw(ViewRootImpl.java:2275)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2147)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1958)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1112)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4518)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.Choreographer.doFrame(Choreographer.java:525)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.os.Handler.handleCallback(Handler.java:615)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.os.Handler.dispatchMessage(Handler.java:92)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.os.Looper.loop(Looper.java:137)
12-15 13:25:17.765: E/AndroidRuntime(4096): at android.app.ActivityThread.main(ActivityThread.java:4898)
12-15 13:25:17.765: E/AndroidRuntime(4096): at java.lang.reflect.Method.invokeNative(Native Method)
12-15 13:25:17.765: E/AndroidRuntime(4096): at java.lang.reflect.Method.invoke(Method.java:511)
12-15 13:25:17.765: E/AndroidRuntime(4096): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
12-15 13:25:17.765: E/AndroidRuntime(4096): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
12-15 13:25:17.765: E/AndroidRuntime(4096): at dalvik.system.NativeStart.main(Native Method)
最佳答案
编辑:查看错误日志，看来您的问题在getinfoGFX类中。在getdata...方法中，似乎正在为SQL查询创建游标。在退出之前，请检查以确保您正在游标上调用close()方法。
调用Invalidate()是一个问题。在看到日志之前，不确定是否会导致崩溃，但是您基本上是将其设置为连续重绘。从android文档Invalidate执行以下操作-
如果在执行操作时从onDraw例程内部调用它，则可以使onDraw函数始终运行。