Question

我有一个需要像iOS中的文本字段一样运行的edittext。当我点击它时，应该可以编辑，否则它应该被禁用。让我们说用户想要编辑某个值，当他按下后退按钮时，连同键盘解除，我希望编辑文本被禁用以进行编辑。

我正在使用的是setCursorVisible（true）和setCursorVisible（false）方法。我确实尝试过使用keyCode事件，但他们并没有帮助。这是我到目前为止所做的尝试：

@Override
    public void onBackPressed() {
// Had the InputMethodManager service here..
        if(imm.isAcceptingText())
        {
           Toast.makeText(ProfileActivity.this,"working",Toast.LENGTH_SHORT).show();
        }
else {
            super.onBackPressed();
            Toast.makeText(ProfileActivity.this,"back pressed called",Toast.LENGTH_SHORT).show();
        }
    }

还尝试覆盖keyDown事件。

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        //replaces the default 'Back' button action
        if(keyCode==KeyEvent.KEYCODE_BACK)
        {

            Log.d("123","called,called");
            return  true;

        }
        return super.onKeyDown(keyCode, event);
    }

Answer 1

creating a subclass of EditText and overriding its onKeyPreIme method

怎么样？

/**
 * This class overrides the onKeyPreIme method to dispatch a key event if the
 * KeyEvent passed to onKeyPreIme has a key code of KeyEvent.KEYCODE_BACK.
 * This allows key event listeners to detect that the soft keyboard was
 * dismissed.
 *
 */
public class ExtendedEditText extends EditText {

    public ExtendedEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

    }

    public ExtendedEditText(Context context, AttributeSet attrs) {
        super(context, attrs);

    }

    public ExtendedEditText(Context context) {
        super(context);

    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
            dispatchKeyEvent(event);
            return false;
        }
        return super.onKeyPreIme(keyCode, event);
    }

}

检测在Android中关闭键盘事件

1 个答案: