如何以编程方式将焦点设置到按钮小部件? [英] How to set focus to a button widget programmatically?
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问题描述
是否可以将焦点设置到位于布局中某处的按钮小部件?onCreate
我的控件/焦点应该以编程方式位于该按钮上.
Is it possible to set a focus to a button widget which lies somewhere down in my layout? onCreate
of the activity my control/focus should be on that button programmatically.
推荐答案
是的,有可能.
Button myBtn = (Button)findViewById(R.id.myButtonId);
myBtn.requestFocus();
或在 XML 中
<Button ...><requestFocus /></Button>
重要说明:按钮小部件需要focusable
和 focusableInTouchMode
.大多数小部件默认是 focusable
但不是 focusableInTouchMode
.所以一定要在代码中设置它
Important Note: The button widget needs to be focusable
and focusableInTouchMode
. Most widgets are focusable
but not focusableInTouchMode
by default. So make sure to either set it in code
myBtn.setFocusableInTouchMode(true);
或在 XML 中
android:focusableInTouchMode="true"
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