Eclipse中的数学（Android）

Question

我已经创建了我的应用程序以及所有这些，当我运行它时，它运行良好。 但是当我按下calculate（button）时，它会计算（X * Y / Z）（X＆Y＆Z = USER INPUT），但是当我按下calculate时应用程序崩溃了。 LOGCAT在启动时就给了我：

    01-18 23:42:06.265: D/SensorManager(29893): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c60ed0
01-18 23:42:06.265: D/Sensors(29893): Remain listener = Sending .. normal delay 200ms
01-18 23:42:06.265: I/Sensors(29893): sendDelay --- 200000000
01-18 23:42:06.265: D/SensorManager(29893): JNI - sendDelay
01-18 23:42:06.265: I/SensorManager(29893): Set normal delay = true
01-18 23:42:06.335: W/IInputConnectionWrapper(29893): getSelectedText on inactive InputConnection
01-18 23:42:06.335: W/IInputConnectionWrapper(29893): setComposingText on inactive InputConnection
01-18 23:42:06.335: W/IInputConnectionWrapper(29893): getExtractedText on inactive InputConnection
01-18 23:42:11.505: W/IInputConnectionWrapper(29893): showStatusIcon on inactive InputConnection
01-18 23:42:11.510: W/IInputConnectionWrapper(29893): showStatusIcon on inactive InputConnection
01-18 23:42:59.375: D/SensorManager(29893): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c60ed0
01-18 23:43:02.000: W/IInputConnectionWrapper(29893): getSelectedText on inactive InputConnection
01-18 23:43:02.000: W/IInputConnectionWrapper(29893): setComposingText on inactive InputConnection
01-18 23:43:02.000: W/IInputConnectionWrapper(29893): getExtractedText on inactive InputConnection
01-18 23:43:03.550: D/SensorManager(29893): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c60ed0
01-18 23:43:03.550: D/Sensors(29893): Remain listener = Sending .. normal delay 200ms
01-18 23:43:03.550: I/Sensors(29893): sendDelay --- 200000000
01-18 23:43:03.555: D/SensorManager(29893): JNI - sendDelay
01-18 23:43:03.555: I/SensorManager(29893): Set normal delay = true
01-18 23:43:03.720: W/IInputConnectionWrapper(29893): showStatusIcon on inactive InputConnection
01-18 23:43:15.335: E/SensorManager(31807): thread start
01-18 23:43:15.340: D/SensorManager(31807): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c5aba0
01-18 23:43:15.345: D/SensorManager(31807): unregisterListener::  Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c5aba0
01-18 23:43:15.345: D/Sensors(31807): Remain listener = Sending .. normal delay 200ms
01-18 23:43:15.345: I/Sensors(31807): sendDelay --- 200000000
01-18 23:43:15.350: D/SensorManager(31807): JNI - sendDelay
01-18 23:43:15.350: I/SensorManager(31807): Set normal delay = true
01-18 23:43:15.365: D/SensorManager(31807): registerListener :: handle = 0  name= LSM330DLC 3-axis Accelerometer delay= 200000 Listener= android.view.OrientationEventListener$SensorEventListenerImpl@41c5aba0
01-18 23:43:15.395: D/libEGL(31807): loaded /system/lib/egl/libEGL_mali.so
01-18 23:43:15.395: D/libEGL(31807): loaded /system/lib/egl/libGLESv1_CM_mali.so
01-18 23:43:15.400: D/libEGL(31807): loaded /system/lib/egl/libGLESv2_mali.so
01-18 23:43:15.405: D/(31807): Device driver API match
01-18 23:43:15.405: D/(31807): Device driver API version: 10
01-18 23:43:15.405: D/(31807): User space API version: 10 
01-18 23:43:15.405: D/(31807): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Tue Oct 16 15:37:13 KST 2012 
01-18 23:43:15.445: D/OpenGLRenderer(31807): Enabling debug mode 0
01-18 23:43:15.335: E/SensorManager(31807): thread start

而在崩溃：

01-18 23:43:52.065: E/AndroidRuntime(31807): FATAL EXCEPTION: main
01-18 23:43:52.065: E/AndroidRuntime(31807): java.lang.IllegalStateException: Could not find a method calculateClickListener(View) in the activity class tk.iWeld.iweld.MainActivity for onClick handler on view class android.widget.Button with id 'resultbutton'
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.view.View$1.onClick(View.java:3678)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.view.View.performClick(View.java:4211)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.view.View$PerformClick.run(View.java:17267)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.os.Handler.handleCallback(Handler.java:615)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.os.Handler.dispatchMessage(Handler.java:92)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.os.Looper.loop(Looper.java:137)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.app.ActivityThread.main(ActivityThread.java:4898)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at java.lang.reflect.Method.invokeNative(Native Method)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at java.lang.reflect.Method.invoke(Method.java:511)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at dalvik.system.NativeStart.main(Native Method)
01-18 23:43:52.065: E/AndroidRuntime(31807): Caused by: java.lang.NoSuchMethodException: calculateClickListener [class android.view.View]
01-18 23:43:52.065: E/AndroidRuntime(31807):    at java.lang.Class.getConstructorOrMethod(Class.java:460)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at java.lang.Class.getMethod(Class.java:915)
01-18 23:43:52.065: E/AndroidRuntime(31807):    at android.view.View$1.onClick(View.java:3671)
01-18 23:43:52.065: E/AndroidRuntime(31807):    ... 11 more

我看到这个问题，但我不明白......（让我们没有得到在这里过多的报价，好吗？）MainActivity.java： http://pastebin.com/41niS5AF activity_main.xml中： HTTP：//引擎收录。 COM / PVLq4t9t

Answer 1

stacktrace是不言自明的：

Caused by: java.lang.NoSuchMethodException: calculateClickListener

您的活动中没有名为calculateClickListener(View v)方法。

更改您的xml：

android:onClick="calculateClickListener" 

至

android:onClick="calculateClickHandler"

---

或在您的Java代码中：

public void calculateClickListener(View view) 

至

 public void calculateClickListener(View view)