没有一个答案对我有用。这里有一个简单的方法。

searchEditText.setVisibility(View.VISIBLE);
                final Handler handler=new Handler();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        searchEditText.requestFocus();
                    }
                }, 400);

只是将requestFocus()方法延迟了400ms。

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。

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);
    }
});

以下是我从Square得到的一个更可靠的解决方案:

fun View.focusAndShowKeyboard() { /** * This is to be called when the window already has focus. */ fun View.showTheKeyboardNow() { if (isFocused) { post { // We still post the call, just in case we are being notified of the windows focus // but InputMethodManager didn't get properly setup yet. val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager imm.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT) } } } requestFocus() if (hasWindowFocus()) { // No need to wait for the window to get focus. showTheKeyboardNow() } else { // We need to wait until the window gets focus. viewTreeObserver.addOnWindowFocusChangeListener( object : ViewTreeObserver.OnWindowFocusChangeListener { override fun onWindowFocusChanged(hasFocus: Boolean) { // This notification will arrive just before the InputMethodManager gets set up. if (hasFocus) { this@focusAndShowKeyboard.showTheKeyboardNow() // It’s very important to remove this listener once we are done. viewTreeObserver.removeOnWindowFocusChangeListener(this) } } }) } }

代码从这里开始。

我最近在一些简单的代码案例中有一些运气 在下面。我还没有完成所有的测试，但是....

EditText input = (EditText) findViewById(R.id.Input);
input.requestFocus();    
input.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, 0f, 0f, 0));
input.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 0f, 0f, 0));

键盘很快就出现了。

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);
}

}