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);
    }
});

当我阅读官方文档时，我认为这是最好的答案，只是将视图传递给参数，如您的EditText，但showSoftKeyboard似乎不能在横向上工作

private fun showSoftKeyboard(view: View) {
    if (view.requestFocus()) {
        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT)
    }
}

private fun closeSoftKeyboard(view: View) {
    if (view.requestFocus()) {
        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm.hideSoftInputFromWindow(view.windowToken, InputMethodManager.HIDE_NOT_ALWAYS)
    }
}

您还可以创建EditText的自定义扩展，该扩展在接收到焦点时知道打开软键盘。这就是我最后要做的。以下是对我有效的方法:

public class WellBehavedEditText extends EditText {
    private InputMethodManager inputMethodManager;
    private boolean showKeyboard = false;

    public WellBehavedEditText(Context context) {
        super(context);
        this.initializeWellBehavedEditText(context);
    }

    public WellBehavedEditText(Context context, AttributeSet attributes) {
        super(context, attributes);
        this.initializeWellBehavedEditText(context);
    }

    public WellBehavedEditText(Context context, AttributeSet attributes, int defStyleAttr) {
        super(context, attributes, defStyleAttr);
        this.initializeWellBehavedEditText(context);
    }

    public WellBehavedEditText(Context context, AttributeSet attributes, int defStyleAttr, int defStyleRes) {
        super(context, attributes, defStyleAttr, defStyleRes);
        this.initializeWellBehavedEditText(context);
    }

    private void initializeWellBehavedEditText(Context context) {
        this.inputMethodManager = (InputMethodManager)context.getSystemService(Context.INPUT_METHOD_SERVICE);

        final WellBehavedEditText editText = this;
        this.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                if(showKeyboard) {
                    showKeyboard = !(inputMethodManager.showSoftInput(editText, InputMethodManager.SHOW_FORCED));
                }
            }
        });
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        if(!focused) this.showKeyboard = false;
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
        boolean result = super.requestFocus(direction, previouslyFocusedRect);
        this.showKeyboard = true;
        final WellBehavedEditText self = this;
        this.post(new Runnable() {
            @Override
            public void run() {
                showKeyboard = !(inputMethodManager.showSoftInput(self, InputMethodManager.SHOW_FORCED));
            }
        });
        return result;
    }
}

我做了这个帮助课。 只需要传递context和你想要聚焦的View show keyboard和hide keyboard。 我希望这能有所帮助。

public class FocusKeyboardHelper {

private View view;
private Context context;
private InputMethodManager imm;

public FocusKeyboardHelper(Context context, View view){
    this.view = view;
    this.context = context;
    imm = (InputMethodManager) context.getSystemService(context.INPUT_METHOD_SERVICE);
}

public void focusAndShowKeyboard(){

    view.requestFocus();
    imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);

}

public void hideKeyBoard(){
    imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}

}

要强制显示软键盘，可以使用

EditText yourEditText= (EditText) findViewById(R.id.yourEditText);
yourEditText.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(yourEditText, InputMethodManager.SHOW_IMPLICIT);

为了移除EditText上的焦点，你需要一个虚拟视图来抓取焦点。

关闭它，你可以使用

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

这适用于在对话框中使用它

public void showKeyboard(){
    InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}

public void closeKeyboard(){
    InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputMethodManager.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
}

我也有同样的问题。editText可视性从GONE变为VISIBLE后，我必须立即设置焦点并显示软键盘。我使用以下代码实现了这一点:

new Handler().postDelayed(new Runnable() {
            
    public void run() {
//        ((EditText) findViewById(R.id.et_find)).requestFocus();
//              
        EditText yourEditText= (EditText) findViewById(R.id.et_find);
//        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
//        imm.showSoftInput(yourEditText, InputMethodManager.SHOW_IMPLICIT);

        yourEditText.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, 0f, 0f, 0));
        yourEditText.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 0f, 0f, 0));                          
    }
}, 200);

它为我工作100ms的延迟，但失败没有任何延迟或只有1ms的延迟。

注释部分代码显示了另一种方法，它只适用于某些设备。我在OS版本2.2(模拟器)、2.2.1(真实设备)和1.6(模拟器)上进行了测试。

这种方法使我免去了很多痛苦。