加上之前的@sumit sonawane的答案，这个解决方案不会在用户滚动时隐藏键盘。

public long pressTime = 0;
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
        pressTime = System.currentTimeMillis();
    }
    else if (ev.getAction() == MotionEvent.ACTION_UP) {
        long releaseTime = System.currentTimeMillis();
        if (releaseTime-pressTime < 200) {
            if (getCurrentFocus() != null) {
                GhostTube.print("BottomNavActivity", "Touch event with keyboard detected...");
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
            }
        }
    }
    return super.dispatchTouchEvent(ev);
}

添加代码到您的活动，也将照顾片段。

嘿，伙计们，我有这个问题的简单解决方案，这个解决方案可以用于简单的注册或登录形式。 我的解决方案与我在ios setontouch监听主视图中实现的解决方案相同

添加ID到你的主相对布局android: ID ="@+ ID /mainlayout"

并将此代码添加到您的活动中

  RelativeLayout mainLayout = (RelativeLayout)findViewById(R.id.mainlayout);
  mainLayout.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                 Log.d("Json Response", "Touch outside");
                  InputMethodManager inputMethodManager = (InputMethodManager)  MainActivity.this.getSystemService(Activity.INPUT_METHOD_SERVICE);
                    inputMethodManager.hideSoftInputFromWindow(MainActivity.this.getCurrentFocus().getWindowToken(), 0);
                return false;
            }
        });

唯一有效的代码

private var viewHeight = 0

private fun setRootViewListener() {
    binding.root.apply {
        viewTreeObserver.addOnGlobalLayoutListener {
            viewHeight = height
        }
    }
}

override fun dispatchTouchEvent(event: MotionEvent): Boolean {
    currentFocus?.let {
        if (it is EditText && event.y < viewHeight - it.measuredHeight) {
            hideKeyboard(it)
        }
    }
    return super.dispatchTouchEvent(event)
}

@Override
    public boolean onTouchEvent(MotionEvent event) {
        InputMethodManager imm = (InputMethodManager)getSystemService(Context.
                INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
        return true;
    }

只需在类中添加此代码 @Overide

public boolean dispatchTouchEvent(MotionEvent ev) {
    View view = getCurrentFocus();
    if (view != null && (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == MotionEvent.ACTION_MOVE) && view instanceof EditText && !view.getClass().getName().startsWith("android.webkit.")) {
        int scrcoords[] = new int[2];
        view.getLocationOnScreen(scrcoords);
        float x = ev.getRawX() + view.getLeft() - scrcoords[0];
        float y = ev.getRawY() + view.getTop() - scrcoords[1];
        if (x < view.getLeft() || x > view.getRight() || y < view.getTop() || y > view.getBottom())
            ((InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow((this.getWindow().getDecorView().getApplicationWindowToken()), 0);
    }
    return super.dispatchTouchEvent(ev);
}

我稍微修改了一下@ navneth -g的答案，增加了null活动焦点处理，避免了创建OnTouchListener的多个实例，键盘隐藏时删除焦点，屏幕滚动时删除隐藏键盘，在小设备上方便。

//In general, the view parameter is root layout
fun Activity.hideKeyboardOnClickOutsideEditText(view: View) {
    // Set up touch listener for non-text box views to hide keyboard.
    var previousAction = 0
    val onTouchListener = View.OnTouchListener { v, event ->
        if (currentFocus != null
            && event.action != MotionEvent.ACTION_DOWN
            && event.action != MotionEvent.ACTION_MOVE
            && previousAction != MotionEvent.ACTION_MOVE
        ) {
            currentFocus?.clearFocus()
            v?.hideKeyboard()
        }
        previousAction = event.action
        false
    }

    if (view !is EditText) {
        view.setOnTouchListener(onTouchListener)
    }

    //If a layout container, iterate over children and seed recursion.
    if (view is ViewGroup) {
        for (i in 0 until view.childCount) {
            val innerView = view.getChildAt(i)
            hideKeyboardOnClickOutsideEditText(innerView)
        }
    }
}
   
//in root layout.xml
android:clickable="true"
android:focusable="true"
android:focusableInTouchMode="true"