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我已经坚持了大约12小时，现在对一些恼人的运行时异常，当我尝试膨胀我创建的自定义视图时，一直在发生。这是我的第一个Android（和Java）程序，所以希望我没有做一些愚蠢的事情。从XML膨胀自定义视图创建Illegalstateexception（Android，Java）
XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10px" >
<com.studentfees.GraphView/>
</RelativeLayout>
类别：
public class GraphView extends View {
Paint paint = new Paint();
Boolean IsTouched = false;
float TouchCoords[] = new float[2];
public enum GraphType {Earnings, Payments, TotalPaid, NoneSet};
GraphType graphtype = GraphType.NoneSet;
Graph graph = new Graph();
Button ButtonLeft;
Button ButtonCentre;
Button ButtonRight;
public GraphView(Context context, AttributeSet attrs)
{
super(context, attrs);
graphtype = GraphType.Earnings;
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
IsTouched = true;
TouchCoords[0] = event.getX();
TouchCoords[1] = event.getY();
this.invalidate();
return super.onTouchEvent(event);
}
@Override
public void onDraw(Canvas canvas) {
GraphSetUp(canvas);
TouchHandler(canvas);
ButtonSetUp();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void ButtonSetUp()
{
}
private void TouchHandler(Canvas canvas)
{
if(IsTouched)
{
IsTouched = false;
canvas.drawCircle(TouchCoords[0], TouchCoords[1],10, paint);
}
}
private void GraphSetUp(Canvas canvas)
{
graph.DrawAxis(canvas, this);
switch(graphtype)
{
case Earnings: graph.LineCoords = Coordinate.ToCoordArray(studentfeesproject.student.ListofEarnings); break;
case Payments: graph.LineCoords = Coordinate.ToCoordArray(studentfeesproject.student.ListofPayments); break;
case TotalPaid: graph.LineCoords = graph.ToHistogram(Coordinate.ToCoordArray(studentfeesproject.student.ListofPayments)); break;
default: break;
}
graph.LineCoords = graph.CoordsToGraph(graph.LineCoords);
graph.DrawLineOnGraph(canvas);
}
}
日志：
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): FATAL EXCEPTION: main
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): java.lang.IllegalStateException: Could not execute method of the activity
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.View$1.onClick(View.java:2082)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.View.performClick(View.java:2461)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.View$PerformClick.run(View.java:8888)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.os.Handler.handleCallback(Handler.java:587)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.os.Handler.dispatchMessage(Handler.java:92)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.os.Looper.loop(Looper.java:123)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at java.lang.reflect.Method.invokeNative(Native Method)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at java.lang.reflect.Method.invoke(Method.java:521)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at dalvik.system.NativeStart.main(Native Method)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): Caused by: java.lang.reflect.InvocationTargetException
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at com.studentfees.studentfeesproject.GetResults(studentfeesproject.java:51)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at java.lang.reflect.Method.invokeNative(Native Method)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at java.lang.reflect.Method.invoke(Method.java:521)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.View$1.onClick(View.java:2077)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): ... 11 more
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): Caused by: java.lang.RuntimeException: Binary XML file line #10: You must supply a layout_width attribute.
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:3592)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:3672)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.widget.RelativeLayout$LayoutParams.<init>(RelativeLayout.java:1047)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:917)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:66)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.LayoutInflater.rInflate(LayoutInflater.java:620)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.LayoutInflater.inflate(LayoutInflater.java:382)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:200)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): at android.app.Activity.setContentView(Activity.java:1647)
05-22 13:57:04.028: ERROR/AndroidRuntime(10594): ... 15 more
+++++++++++ +++++++ ++++ +++++++++++
编辑：
新的日志作为第一个答案的结果 - 感谢您的帮助inazaruk：
05-22 16:02:23.055: WARN/dalvikvm(13186): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): FATAL EXCEPTION: main
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): java.lang.NullPointerException
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.studentfees.Graph.CoordsToGraph(Graph.java:81)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.studentfees.GraphView.GraphSetUp(GraphView.java:93)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.studentfees.GraphView.onDraw(GraphView.java:55)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.View.draw(View.java:6793)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.View.draw(View.java:6796)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.widget.FrameLayout.draw(FrameLayout.java:354)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.View.draw(View.java:6796)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.widget.FrameLayout.draw(FrameLayout.java:354)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1894)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewRoot.draw(ViewRoot.java:1432)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewRoot.performTraversals(ViewRoot.java:1174)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.view.ViewRoot.handleMessage(ViewRoot.java:1752)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.os.Handler.dispatchMessage(Handler.java:99)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.os.Looper.loop(Looper.java:123)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at java.lang.reflect.Method.invokeNative(Native Method)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at java.lang.reflect.Method.invoke(Method.java:521)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
05-22 16:02:23.071: ERROR/AndroidRuntime(13186): at dalvik.system.NativeStart.main(Native Method)
添加了布局参数，但仍然得到了同样的问题:( – aforward 2011-05-22 14:21:51
你得到完全相同的日志可能新日志添加到您的问题 – inazaruk 2011-05-22 14:40:28
我已经添加了新的？登录为编辑，谢谢 – aforward 2011-05-22 15:06:27