显示:

InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
imm.toggleSoftInput(0,
InputMethodManager.HIDE_NOT_ALWAYS);

隐藏:

InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(mLoginButton.getWindowToken(), 0);

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