setupUI((RelativeLayout) findViewById(R.id.activity_logsign_up_RelativeLayout));

将该方法传递到布局文件中。您必须选择常用的XML布局文件。 因为，键盘隐藏适用于整个布局。

public void setupUI(View view) {
        // Set up touch listener for non-text box views to hide keyboard.
        if (!(view instanceof EditText)) {
            view.setOnTouchListener(new View.OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event) {
                    hideSoftKeyboard(Your Context); // Pass your context
                    return false;
                }
            });
        }
        //If a layout container, iterate over children and seed recursion.
        if (view instanceof ViewGroup) {
            for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
                View innerView = ((ViewGroup) view).getChildAt(i);
                setupUI(innerView);
            }
        }
    }

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"

有一个更简单的方法，基于iPhone同样的问题。简单地覆盖背景的布局触摸事件，其中包含编辑文本。只需在活动的OnCreate中使用这段代码(login_fondo是根布局):

    final LinearLayout llLogin = (LinearLayout)findViewById(R.id.login_fondo);
    llLogin.setOnTouchListener(
            new OnTouchListener()
            {
                @Override
                public boolean onTouch(View view, MotionEvent ev) {
                    InputMethodManager imm = (InputMethodManager) mActivity.getSystemService(
                            android.content.Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(mActivity.getCurrentFocus().getWindowToken(), 0);
                    return false;
                }
            });

你可以通过以下步骤来实现这一点:

Make the parent view(content view of your activity) clickable and focusable by adding the following attributes android:clickable="true" android:focusableInTouchMode="true" Implement a hideKeyboard() method public void hideKeyboard(View view) { InputMethodManager inputMethodManager =(InputMethodManager)getSystemService(Activity.INPUT_METHOD_SERVICE); inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0); } Lastly, set the onFocusChangeListener of your edittext. edittext.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (!hasFocus) { hideKeyboard(v); } } });

正如下面的一条评论所指出的，如果父视图是ScrollView，这可能不起作用。对于这种情况，clickable和focusableInTouchMode可以直接添加到ScrollView下面的视图上。

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。

我在活动中实现了dispatchTouchEvent来做到这一点:

private EditText mEditText;
private Rect mRect = new Rect();
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);

    int[] location = new int[2];
    mEditText.getLocationOnScreen(location);
    mRect.left = location[0];
    mRect.top = location[1];
    mRect.right = location[0] + mEditText.getWidth();
    mRect.bottom = location[1] + mEditText.getHeight();

    int x = (int) ev.getX();
    int y = (int) ev.getY();

    if (action == MotionEvent.ACTION_DOWN && !mRect.contains(x, y)) {
        InputMethodManager input = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        input.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
    }
    return super.dispatchTouchEvent(ev);
}

我测试过了，效果完美!