Android软键盘之判断软键盘是否显示

网上看了不少关于软键盘的显示操作，这里自己也做一下记录。

步骤1.重写布局，在onLayout中设置监听

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();
    }
}

步骤2. 判断尺度大小

    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;
    }

步骤3. 进行监听

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