網上看了不少關於軟鍵盤的顯示操作，這裡自己也做一下記錄。

步驟1.重寫佈局，在onLayout中設定監聽

public class MyKeyBoardLinearLayout extends LinearLayout {
    private OnSoftKeyboardListener mSoftKeyboardListener;

    public MyKeyBoardLinearLayout(@NonNull Context context) {
        super(context);
    }

    public MyKeyBoardLinearLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public MyKeyBoardLinearLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public interface OnSoftKeyboardListener{
         void onSoftKeyboardChange();
    }

    public void setSoftKeyboardListener(OnSoftKeyboardListener listener){
        mSoftKeyboardListener=listener;
    }
    
    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        if (mSoftKeyboardListener != null)
            mSoftKeyboardListener.onSoftKeyboardChange();
    }
}
 

步驟2. 判斷尺度大小

    public boolean isSoftKeyboardShow(View rootView) {
        int screenHeight;
        screenHeight = getResources().getDisplayMetrics().heightPixels;
        Rect rect = new Rect();
        rootView.getWindowVisibleDisplayFrame(rect);
        int visibleBottom = rect.bottom;
        return visibleBottom < screenHeight * 2 / 3;
    }
 

步驟3. 進行監聽

        mLlRoot.setSoftKeyboardListener(() -> {
            boolean isShow = isSoftKeyboardShow(mLlRoot);
            if (isShow) {
                UIUtils.showToast("展示");
            } else {
                UIUtils.showToast("隱藏");
            }
        });

 方式二:（也是很easy的原理差不多，優勢是用不著重新寫佈局）

    private void setViewObserver() {
        ViewTreeObserver observer = mEtTest.getViewTreeObserver();
        observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                if (KeyboardHelper.isKeyboardVisible(TestActivity.this)){
                    UIUtils.showToast("可見");
                }else {
                    UIUtils.showToast("隱藏");
                }
            }
        });
    }

    /**
     * Determine if keyboard is visible
     *
     * @param activity Activity
     * @return Whether keyboard is visible or not
     */
    public static boolean isKeyboardVisible(Activity activity) {
        Rect r = new Rect();

        View activityRoot = ViewHelper.getActivityRoot(activity);
        int visibleThreshold =
                Math.round(DisplayHelper.dp2px(activity, KEYBOARD_VISIBLE_THRESHOLD_DP));
        // KEYBOARD_VISIBLE_THRESHOLD_DP = 100;
        activityRoot.getWindowVisibleDisplayFrame(r);

        int heightDiff = activityRoot.getRootView().getHeight() - r.height();

        return heightDiff > visibleThreshold;
    }

 我推薦使用的是方式二來進行處理。簡易便捷，而且不用麻煩的寫佈局，是的呢。

點選空白處實現軟鍵盤的隱藏效果

    /**
     * 點選空白處實現 隱藏軟鍵盤的功能(點選的是EditText 那麼就還是顯示 這沒問題的) ----
     * @param view
     * @param windowToken
     */
    public static void hideKeyboard(final View view,IBinder windowToken) {
        if(windowToken == null){
            return;
        }
        InputMethodManager inputMethodManager = (InputMethodManager) view.getContext().getApplicationContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputMethodManager == null){
            return;
        }
        boolean active = inputMethodManager.isActive();
        if (active) {
            inputMethodManager.hideSoftInputFromWindow(windowToken, 0);
        }
    }

   
   
    // 進行方法呼叫的方式如下: 
        mContent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (getCurrentFocus() != null) {
                    KeyboardHelper.hideKeyboard(mBtnNext, getCurrentFocus().getWindowToken());
                }
            }
        });