1、布局设置

<EditText
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:imeOptions="actionSearch"
        android:singleLine="true" />

2、监听设置

EditText.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View view, int i, KeyEvent keyEvent) {
                if (i == KeyEvent.KEYCODE_ENTER && keyEvent.getAction() == KeyEvent.ACTION_DOWN) {
                    // 收起软键盘
                    ((InputMethodManager) getSystemService(INPUT_METHOD_SERVICE))
                            .hideSoftInputFromWindow(
                                    AttentionStoreActivity.this
                                            .getCurrentFocus()
                                            .getWindowToken(),
                                    InputMethodManager.HIDE_NOT_ALWAYS);
                    // 其他操作
                      ...
                      return true;
                }
                return false;
            }
        });