cocos2dx-3.12 解决android不能监听键盘高度事件

来源：互联网发布：全民奇迹挂机软件编辑：程序博客网时间：2024/06/08 17:47

通过重写cocos2d::ui::EditBox的keyboardWillShow和keyboardWillHide方法可以监听键盘高度。

在iOS平台能实现该功能，但是android平台上运行却不是我们想要的结果，还是键盘弹起时，整个界面往上移动。

通过打印日志，发现EditBoxView重写的keyboardWillShow和keyboardWillHide方法没有被执行，这样就不能监听键盘高度变化。如果想要实现这个功能我们只能修改部分源代码。

找到Cocos2dxEditBoxHelper.java文件，如图：

在73行左右后面添加如下代码：

    private static native void keyboardVisibleChanged(int width, int height);    public static void __keyboardVisibleChanged(int width, int height){    keyboardVisibleChanged(width, height);    }        public void observeSoftKeyboard() {      final View decorView = mCocos2dxActivity.getWindow().getDecorView();  decorView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {              int keyboardState = -1;            int minKeyboardHeight = 0;            @Override              public void onGlobalLayout() {                  Rect rect = new Rect();                  decorView.getWindowVisibleDisplayFrame(rect);                  int keyboardHeight = decorView.getHeight() - (rect.bottom - rect.top);                  boolean hidden = ((double) keyboardHeight / decorView.getHeight()) < 0.2;                 int state = hidden ? 1 : 0;                if (keyboardState != state) {                int height = 0;                if (state == 1) {                    minKeyboardHeight = keyboardHeight;                    } else {                    height = keyboardHeight - minKeyboardHeight;                     }                final int mWidth = decorView.getWidth();                final int mHeight = height;                mCocos2dxActivity.runOnGLThread(new Runnable() {                        @Override                        public void run() {                            Cocos2dxEditBoxHelper.__keyboardVisibleChanged(mWidth, mHeight);                        }                    });                keyboardState = state;                }            }          });    }

在public Cocos2dxEditBoxHelper(ResizeLayout layout)函数中添加如下代码：

    public Cocos2dxEditBoxHelper(ResizeLayout layout) {        Cocos2dxEditBoxHelper.mFrameLayout = layout;        Cocos2dxEditBoxHelper.mCocos2dxActivity = (Cocos2dxActivity) Cocos2dxActivity.getContext();        Cocos2dxEditBoxHelper.mEditBoxArray = new SparseArray<Cocos2dxEditBox>();                // 监听键盘高度        observeSoftKeyboard();    }

打开cocos2d/cocos/ui/UIEditBox/UIEditBoxImpl-android.cpp文件，添加如下代码：

static void editBoxEditingDidBegin(int index);static void editBoxEditingDidChanged(int index, const std::string& text);static void editBoxEditingDidEnd(int index, const std::string& text);static void keyboardVisibleChanged(int width, int height);extern "C"{    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxEditBoxHelper_editBoxEditingDidBegin(JNIEnv *env, jclass, jint index) {        editBoxEditingDidBegin(index);    }    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxEditBoxHelper_editBoxEditingChanged(JNIEnv *env, jclass, jint index, jstring text) {        std::string textString = StringUtils::getStringUTFCharsJNI(env,text);        editBoxEditingDidChanged(index, textString);    }    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxEditBoxHelper_editBoxEditingDidEnd(JNIEnv *env, jclass, jint index, jstring text) {        std::string textString = StringUtils::getStringUTFCharsJNI(env,text);        editBoxEditingDidEnd(index, textString);    }        JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxEditBoxHelper_keyboardVisibleChanged(JNIEnv *env, jclass, jint width, jint height) {        keyboardVisibleChanged(width, height);    }}void keyboardVisibleChanged(int width, int height){    auto winSize = cocos2d::Director::getInstance()->getWinSize();        float keyboardHeight = winSize.width * height / (float)width;        cocos2d::IMEKeyboardNotificationInfo notiInfo;    notiInfo.begin = cocos2d::Rect(0, 0, winSize.width, keyboardHeight);    notiInfo.end = cocos2d::Rect(0, 0, winSize.width, keyboardHeight);    notiInfo.duration = 0.25;        cocos2d::IMEDispatcher* dispatcher = cocos2d::IMEDispatcher::sharedDispatcher();    if (keyboardHeight == 0) {        dispatcher->dispatchKeyboardWillHide(notiInfo);    } else {        dispatcher->dispatchKeyboardWillShow(notiInfo);    }}

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