ClassCastException異常：android.inputmethodservice.KeyboardView不能轉換到Android的com.support.mukhtar.simplekeyboard.CustomKeyboardView

Question

我SimpleIME.kt類，以實現簡單的InputMethodEditor，做我的自定義鍵盤Android上：

class SimpleIME : InputMethodService(), OnKeyboardActionListener { 

private var kv: CustomKeyboardView? = null 
private var keyboard: Keyboard? = null 
companion object{ 
    const val TAG :String = "myLogs" 
} 

private var caps = false 

override fun onCreateInputView(): View? { 
    kv = layoutInflater.inflate(R.layout.keyboard, null) as CustomKeyboardView 
    keyboard = Keyboard(this, R.xml.qwerty) 
    kv!!.keyboard = keyboard 
    kv!!.setOnKeyboardActionListener(this) 
    Log.d(TAG,"onCreateInputView") 
    return kv 
} 
... 
} 

和我CustomKeuboardView類，如下：

class CustomKeyboardView : KeyboardView { 

constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) 

constructor(context: Context, attrs: AttributeSet?, defStyle: Int) : super(context, attrs, defStyle) 

override fun onKeyMultiple(keyCode: Int, repeatCount: Int, event: KeyEvent?): Boolean { 
    return super.onKeyMultiple(keyCode, repeatCount, event) 
} 

override fun onTouchEvent(me: MotionEvent?): Boolean { 
    Log.d(TAG,"onTouchEvent "+me.toString()) 
    return super.onTouchEvent(me) 
} 
} 

它拋出ClassCastException異常如下：

java.lang.ClassCastException: android.inputmethodservice.KeyboardView cannot be cast to com.support.mukhtar.simplekeyboard.CustomKeyboardView 
                at com.support.mukhtar.simplekeyboard.SimpleIME.onCreateInputView(SimpleIME.kt:30) 
                at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1248) 
                at android.inputmethodservice.InputMethodService.showWindowInner(InputMethodService.java:1669) 
                at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:1636) 
                at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:497) 
                at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:202) 
                at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:40) 
                at android.os.Handler.dispatchMessage(Handler.java:102) 
                at android.os.Looper.loop(Looper.java:136) 
                at android.app.ActivityThread.main(ActivityThread.java:5426) 
                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:1268) 
                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084) 
                at dalvik.system.NativeStart.main(Native Method) 

如果我實現SimpleIME.kt類如下：

class SimpleIME : InputMethodService(), OnKeyboardActionListener { 

private var kv: KeyboardView? = null 
private var keyboard: Keyboard? = null 
companion object{ 
    const val TAG :String = "myLogs" 
} 

private var caps = false 

override fun onCreateInputView(): View? { 
    kv = layoutInflater.inflate(R.layout.keyboard, null) as KeyboardView 
    keyboard = Keyboard(this, R.xml.qwerty) 
    kv!!.keyboard = keyboard 
    kv!!.setOnKeyboardActionListener(this) 
    Log.d(TAG,"onCreateInputView") 
    return kv 
} 
... 
} 

它工作正常，但我需要爲處理多個點擊，所以我認爲這是實現CustomKeyboardView類必要KeyboardView實施的onTouchEvent; 有是用Java編寫CustomKeyboardView的例子：https://github.com/blackcj/AndroidCustomKeyboard.git 請幫

我的問題不一樣的：java.lang.ClassCastException: android.inputmethodservice.KeyboardView cannot be cast to android.view.ViewGroup

因爲沒有與layout.xml一個問題，但我沒有任何與它的問題因爲它的工作原理，如果我拿的KeyboardView作爲

之前顯示我layout.keyboard.xml文件：

<?xml version="1.0" encoding="UTF-8"?> 
<android.inputmethodservice.KeyboardView 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/keyboard" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:layout_alignParentBottom="true" 
android:background="#3Aad1a" 
android:keyPreviewLayout ="@layout/preview" 
/> 

Answer 1

只需更換R.layout.keyboard xml文件中的到CustomKeyboardView。