如何通过编程将焦点设置到按钮小部件? [英] How to set focus to a button widget programmatically?

问题描述

是否可以将焦点设置在布局中某处的按钮小部件上?我的控件/焦点的活动onCreate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.

Button myBtn = (Button)findViewById(R.id.myButtonId);
myBtn.requestFocus();

或XML

<Button ...><requestFocus /></Button>

重要说明:按钮小部件必须为focusable 和 focusableInTouchMode.默认情况下，大多数小部件为focusable，但不是focusableInTouchMode.因此，请确保在代码中进行设置

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XML

android:focusableInTouchMode="true"

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