问如何强制键盘出现？

EN

button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Focus the field.
            editText.requestFocus();
            // Show soft keyboard for the user to enter the value.
            InputMethodManager im = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            im.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
        }
    });

 <EditText...
     android:inputType="number"/>

editText.setInputType(InputType.TYPE_CLASS_NUMBER);

public static void toggleKeyboard(Context context) {
    try {
        InputMethodManager imm = (InputMethodManager)context.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
    } catch (Exception e) {
        Log.e("On show keyboard error: %s", e.getMessage());
    }
}