舱单内:

android:windowSoftInputMode="stateAlwaysVisible" -初始启动键盘。 android:windowSoftInputMode="stateAlwaysHidden" -初始隐藏键盘。

我也喜欢使用“adjustPan”，因为当键盘启动时，屏幕会自动调整。

 <activity
      android:name="YourActivity"
      android:windowSoftInputMode="stateAlwaysHidden|adjustPan"/>

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;
    }
}

 void requestFocus(View editText, Activity activity)
{
    try {
        editText.requestFocus();
        InputMethodManager imm = (InputMethodManager) a.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
        activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
    } catch (Exception e) {
        e.printStackTrace();
    }

}

加上这一行也不要忘记

activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

editText.post(new Runnable() {
    @Override
    public void run() {
        InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
    }
});

我用定时器。键盘可以显示编辑文本聚焦。

    edittext = (EditText) findViewById(R.id.edittext );
    edittext.requestFocus();
    edittext.setFocusableInTouchMode(true);
    if (edittext.requestFocus()) {
        final Thread timer = new Thread() {
            public void run() {
                try{
                    sleep(500);
                    InputMethodManager imm =(InputMethodManager) getApplicationContext().getSystemService(INPUT_METHOD_SERVICE);
                    imm.showSoftInput(edittext, SHOW_IMPLICIT);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        timer.start();

我发现了一个奇怪的行为，因为在我的一个应用程序中，软键盘在进入活动时自动显示(onCreate中有editText.requestFocus())。

进一步挖掘，我发现这是因为布局周围有一个ScrollView。如果我删除ScrollView，行为如原始问题声明中所述:只有在单击已经聚焦的editText时，软键盘才会显示出来。

如果这对你不起作用，试着加入一个ScrollView——无论如何这是无害的。