Android 如何以编程方式将焦点设置到按钮小部件？
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How to set focus to a button widget programmatically?
提问by Vinayak Bevinakatti
Is it possible to set a focus to a button widget which lies somewhere down in my layout? onCreateof the activity my control/focus should be on that button programmatically.
是否可以将焦点设置到位于布局中某处的按钮小部件？onCreate我的控制/焦点应该以编程方式放在该按钮上。
回答by Pentium10
Yeah it's possible.
是的，这是可能的。
Button myBtn = (Button)findViewById(R.id.myButtonId);
myBtn.requestFocus();
or in XML
或 XML
<Button ...><requestFocus /></Button>
Important Note:The button widget needs to be focusableandfocusableInTouchMode. Most widgets are focusablebut not focusableInTouchModeby default. So make sure to either set it in code
重要说明：按钮小部件需要是focusable和focusableInTouchMode。大多数小部件是focusable但不是focusableInTouchMode默认情况下。所以一定要在代码中设置它
myBtn.setFocusableInTouchMode(true);
or in XML
或 XML
android:focusableInTouchMode="true"
回答by Zan
Try this:
尝试这个：
btn.requestFocusFromTouch();
