Android 软键盘切换表情为什么出现抖动（如何解决抖动）

1 为什么会软键盘切换表情会出现页面闪动？

怎么解决呢？

<activity
            android:name=".activity.ChatActivity"
            android:screenOrientation="portrait"
            android:theme="@style/FormTheme"
            android:windowSoftInputMode="adjustResize|stateAlwaysHidden" />

关键点就在于这个windowSoftInputMode,

adjustResize：软键盘弹出时，顶起布局，软键盘隐藏时，布局还原

还有另一个mode

adjustNothing：软键盘弹出隐藏，布局始终无变化

当然，也可以代码设置这些Mode

public static void updateSoftInputMethod(Activity activity, int softInputMode) {
        if (!activity.isFinishing()) {
            WindowManager.LayoutParams params = activity.getWindow().getAttributes();
            if (params.softInputMode != softInputMode) {
                params.softInputMode = softInputMode;
                activity.getWindow().setAttributes(params);
            }
        }
    }

2 弹出软键盘的逻辑

1.判断表情是否显示，显示就才有延迟进行关闭表情

findViewById(R.id.et_input).setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            InputMethodUtils.setKeyboardShowing(true);
            if (isEmotionPanelShowing()) {
                mEmotionPanel.postDelayed(mHideEmotionPanelTask, 200);
            }
        }
        return false;
    }
});

2，关闭表情的方法

/**
 * 采用延迟操作，关闭表情
 */

private Runnable mHideEmotionPanelTask = new Runnable() {
    @Override
    public void run() {
        hideEmotionPanel();
    }
};

/**
 * 隐藏表情
 */

public void hideEmotionPanel() {
    if (mEmotionPanel.getVisibility() != View.GONE) {
        mEmotionPanel.setVisibility(View.GONE);
        InputMethodUtils.updateSoftInputMethod(this, WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
    }
}

3 显示表情的方法

    /**
     * 切换表情
     */
 	findViewById(R.id.iv_switcher).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (isEmotionPanelShowing()) {
                mEmotionPanel.postDelayed(mHideEmotionPanelTask, 200);
                InputMethodUtils.toggleSoftInput(getCurrentFocus());
            } else {
                showEmotionPanel();
            }
        }
    });
        /**
 * 判断表情是否显示
 * @return
 */
	public boolean isEmotionPanelShowing() {
    	return mEmotionPanel.getVisibility() == View.VISIBLE;
	}

/**
 * 显示表情的逻辑
 * 1，改变  WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING
 * 2，显示表情
 * 3，关闭软键盘
 */
	public void showEmotionPanel() {
   	 		mEmotionPanel.removeCallbacks(mHideEmotionPanelTask);
    		InputMethodUtils.updateSoftInputMethod(this, WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);
    		mEmotionPanel.setVisibility(View.VISIBLE);
   		 	InputMethodUtils.hideKeyboard(getCurrentFocus());
}

这样切换表情不会闪动了

4 表情控件显示高度和软键盘高度一致

1.获取软键盘高度

   /**
     * 只有当Activity的windowSoftInputMode设置为adjustResize时才有效
     */
    public static void detectKeyboard(final Activity activity, final OnKeyboardEventListener listener) {
        final View activityRootView = ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);
        if (activityRootView != null) {
            ViewTreeObserver viewTreeObserver = activityRootView.getViewTreeObserver();
            if (viewTreeObserver != null) {
                //OnGlobalLayoutListener检测软键盘是否弹出
                viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        final Rect r = new Rect();
                        activityRootView.getWindowVisibleDisplayFrame(r);
                        int heightDiff = DisplayUtils.getScreenHeight() - (r.bottom - r.top);
                        boolean show = heightDiff >= sKeyBoardHeight / 2;
                        if (show && sIsKeyboardShowing) {
                            if (show) {
                                int keyboardHeight = heightDiff - DisplayUtils.getStatusBarHeight();
                                if (keyboardHeight != sKeyBoardHeight) {
                                    sKeyBoardHeight = keyboardHeight;
                                    if (listener != null) {
                                        listener.updateEmotionPanelHeight(keyboardHeight);
                                    }
                                }
                                if (listener != null) {
                                    listener.onSoftKeyboardOpened();
                                }
                            } else {
                                if (listener != null) {
                                    listener.onSoftKeyboardClosed();
                                }
                            }
                        }
                    }
                });
            }
        }
    }
    2,把软键盘高度赋值给表情控件高度
	public void updateEmotionHeight(int keyboardHeight) {
   		 ViewGroup.LayoutParams params = mEmotionPanel.getLayoutParams();
    		if (params != null && params.height != keyboardHeight) {
        	params.height = keyboardHeight;
       		 mEmotionPanel.setLayoutParams(params);
    	}
}

最后附上demo的下载链接；
https://download.csdn.net/download/lilinhualisen/13188461
demo

本文地址：https://blog.csdn.net/lilinhualisen/article/details/110122195