摘抄代码没测试 发起程序的返回顺序以及恩enter建取消输入法

1.<activity ... android:launchMode="singleTop" /> 

Intent intent= new Intent(context, YourActivity.class); 
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);

2.yourEditTextHere.setOnEditorActionListener(new OnEditorActionListener() { 

@Override 
        public boolean onEditorAction(TextView v, int actionId, 
                KeyEvent event) { 
            if (event != null&& (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) { 
                InputMethodManager in = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
                in.hideSoftInputFromWindow(searchBar 
                        .getApplicationWindowToken(), 
                        InputMethodManager.HIDE_NOT_ALWAYS); 
               userValidateEntry(); 
            } 
            return false; 
        } 
    });

这个我测试没有看出啥效果