我已经改进了方法，把下面的代码放在一些UI实用工具类(最好，不一定)，这样它可以从所有的活动或片段类访问，以达到它的目的。

public static void serachAndHideSoftKeybordFromView(View view, final Activity act) {
    if(!(view instanceof EditText)) {
        view.setOnTouchListener(new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                hideSoftKeyboard(act);
                return false;
            }
        });
    }
    if (view instanceof ViewGroup) {
        for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
            View nextViewInHierarchy = ((ViewGroup) view).getChildAt(i);
            serachAndHideSoftKeybordFromView(nextViewInHierarchy, act);
        }
    }
}
public static void hideSoftKeyboard (Activity activity) {
    InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
    inputMethodManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
}

然后假设你需要从activity中调用它，像这样调用;

UIutils.serachAndHideSoftKeybordFromView(findViewById(android.R.id.content), YourActivityName.this);

请注意

findViewById (android.R.id.content)

这给了我们当前组的根视图(你不能在根视图上设置id)。

欢呼:)

另一个想法是覆盖onInterceptTouchEvent方法在根视图为您的活动。

触摸事件从屏幕上最前面的视图(触摸事件发生的地方)沿着调用onTouch方法的视图堆栈向下移动，直到任何视图返回true，表明触摸事件被消费。由于许多视图默认使用触摸事件(例如，EditText或TextView的情况)，事件不会到达活动的根视图onTouch方法。

But, before do this traversal, the touch event travels another path, going from the root view down the view tree until it gets to the front most view. This traversal is done by calling onInterceptTouchEvent. If the method returns true, it intercepts the event... nahhh, but that is a little bit trick, I don't think you want to do that nor to know the details. What you need to know is that you can override this method on the root view for your Activity, and put there the code to hide the keyboard when necessary.

我修改了Andre Luis IM的解决方案，我做到了这一点:

我创建了一个实用工具方法来隐藏软键盘，就像Andre Luiz IM做的那样:

public static void hideSoftKeyboard(Activity activity) {
    InputMethodManager inputMethodManager = (InputMethodManager)  activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
    inputMethodManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
}

但不是注册一个OnTouchListener为每个视图，给一个糟糕的性能，我注册了OnTouchListener只为根视图。由于事件冒泡直到被消费(EditText是默认消费它的视图之一)，如果它到达根视图，那是因为它没有被消费，所以我关闭软键盘。

findViewById(android.R.id.content).setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        Utils.hideSoftKeyboard(activity);
        return false;
    }
});

我是这样做的:

@Override
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())
                hideKeyboard(this);
        }
    return super.dispatchTouchEvent(ev);
}

隐藏键盘代码:

public static void hideKeyboard(Activity act) {
    if(act!=null)
      ((InputMethodManager)act.getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow((act.getWindow().getDecorView().getApplicationWindowToken()), 0);
  }

Done

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;
            }
        });

尝试把stateHidden作为你的活动windowSoftInputMode值

http://developer.android.com/reference/android/R.attr.html#windowSoftInputMode

例如你的活动:

this.getWindow().setSoftInputMode(
    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);