你可以试着强迫软键盘出现，这对我来说是有效的:

...
dialog.show();
input.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

代码片段……

public void hideKeyboard(Context activityContext){

    InputMethodManager imm = (InputMethodManager)
            activityContext.getSystemService(Context.INPUT_METHOD_SERVICE);

    //android.R.id.content ( http://stackoverflow.com/a/12887919/2077479 )
    View rootView = ((Activity) activityContext)
            .findViewById(android.R.id.content).getRootView();

    imm.hideSoftInputFromWindow(rootView.getWindowToken(), 0);
}

public void showKeyboard(Context activityContext, final EditText editText){

    final InputMethodManager imm = (InputMethodManager)
            activityContext.getSystemService(Context.INPUT_METHOD_SERVICE);

    if (!editText.hasFocus()) {
        editText.requestFocus();
    }

    editText.post(new Runnable() {
        @Override
        public void run() {
            imm.showSoftInput(editText, InputMethodManager.SHOW_FORCED);
        }
    });
}

我在使用视图动画时也遇到了类似的问题。所以我已经放了一个动画监听器，以确保在尝试请求对所显示的编辑文本进行键盘访问之前，我将等待动画结束。

    bottomUp.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {
        }

        @Override
        public void onAnimationEnd(Animation animation) {
            if (textToFocus != null) {
                // Position cursor at the end of the text
                textToFocus.setSelection(textToFocus.getText().length());
                // Show keyboard
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.showSoftInput(textToFocus, InputMethodManager.SHOW_IMPLICIT);
            }
        }

        @Override
        public void onAnimationRepeat(Animation animation) {
        }
    });

芬兰湾的科特林:

val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager

fun showKeyboard() {
        imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0)
    }

fun hideKeyboard() {
        imm.hideSoftInputFromWindow(phoneNoInputTxt.windowToken, 0);
    }

那你想怎么叫就怎么叫!

kotlin扩展使用下面。

fun EditText.toggle() {
   requestFocus()
   val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
   imm.showSoftInput(this, 0)
}

通过以下方式访问:

editText.toggle()

以下代码摘自谷歌的4.1 SearchView源代码。这似乎也适用于较小版本的Android。

private Runnable mShowImeRunnable = new Runnable() {
    public void run() {
        InputMethodManager imm = (InputMethodManager) getContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);

        if (imm != null) {
            imm.showSoftInput(editText, 0);
        }
    }
};

private void setImeVisibility(final boolean visible) {
    if (visible) {
        post(mShowImeRunnable);
    } else {
        removeCallbacks(mShowImeRunnable);
        InputMethodManager imm = (InputMethodManager) getContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);

        if (imm != null) {
            imm.hideSoftInputFromWindow(getWindowToken(), 0);
        }
    }
}

此外，需要在创建控件/活动时添加以下代码。(在我的例子中，它是一个复合控件，而不是一个活动)。

this.editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
    public void onFocusChange(View v, boolean hasFocus) {
        setImeVisibility(hasFocus);
    }
});