java.lang.ClassCastException同时膨胀布局

Question

我正在使用Android软键盘和应用自定义主题的键。

我用下面的代码这样做：

@Override 
public View onCreateInputView() { 

    // Set custom theme to input view. 
    int themeLayout = sharedPreferences.getInt(THEME_KEY, R.layout.input_1); 
    mInputView = (LatinKeyboardView) getLayoutInflater().inflate(
      themeLayout, null); 
    mInputView.setOnKeyboardActionListener(this); 

    // Apply the selected keyboard to the input view. 
    setLatinKeyboard(getSelectedSubtype()); 

    return mInputView; 
} 

但我收到以下错误：

java.lang.ClassCastException: at com.xxx.xxx.android.SoftKeyboard.onCreateInputView (SoftKeyboard.java:159) at com.xxx.xxx.android.SoftKeyboard.onStartInput (SoftKeyboard.java:232) at android.inputmethodservice.InputMethodService.doStartInput (InputMethodService.java:2641) at android.inputmethodservice.InputMethodService$InputMethodImpl.startInput (InputMethodService.java:590) at android.inputmethodservice.IInputMethodWrapper.executeMessage (IInputMethodWrapper.java:186) at com.android.internal.os.HandlerCaller$MyHandler.handleMessage (HandlerCaller.java:37) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6682) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1520) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1410)

布局：

<com.sunzala.xxxx.android.LatinKeyboardView 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="@drawable/kb_bg_1" 
    android:keyBackground="@drawable/key_bg_fill_grey" 
    android:keyPreviewLayout="@layout/key_preview_layout" 
    android:keyPreviewOffset="@dimen/keyPreviewOffset" 
    android:keyTextColor="@color/white" 
    android:popupLayout="@layout/keyboard_popup_layout" /> 

这工作时，我测试的我的设备，但发布应用程序后发生崩溃日志中的错误。

Answer 1

也许proguard缩小了你的自定义视图。您可以通过在build.gradle文件的释放块中设置minifyEnabled false来禁用proguard。

如果您想要使用proguard，请在proguard-rules.pro中添加以下几行以保留自定义视图。

-keep public class * extends android.view.View { 
    public <init> (android.content.Context); 
    public <init> (android.content.Context , android.util.AttributeSet); 
    public <init> (android.content.Context , android.util.AttributeSet , int); 
    public void set *(...); 
}