android - Android防止键盘关闭

Question

是否可以防止用户关闭软键盘。换句话说，当我的活动可见时，屏幕上的键盘（始终）可用。这可能吗？如果是这样，你将如何实现它？

Answer 1

无论焦点如何，这都应该强制键盘显示：

InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(yourViewObject.getWindowToken(), 0);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,0);

Answer 2

您需要覆盖onKeyUp()和onKeyDown()方法，如下所示，

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK)     
    {
        ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput
                (InputMethodManager.SHOW_FORCED,InputMethodManager.HIDE_IMPLICIT_ONLY);
    }
    return super.onKeyUp(keyCode, event);
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK)     
    {
        ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput
                (InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
    }
    return super.onKeyDown(keyCode, event);
}

您也可以尝试任何一种方式，通过使用OnEditorActionListener，看看下面的代码，

EditText txtMyEdit = (EditText) findViewById(R.id.txtEdit);
txtMyEdit.setOnEditorActionListener(new OnEditorActionListener() 
{
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) 
    {
        if (actionId == EditorInfo.IME_ACTION_DONE) 
        {
            // your additional processing... 
            return true;
        } 
        else 
        {
            return false;
        }
    }
});