android开发edittext横竖屏切换游标消失不显示

最新推荐文章于 2022-07-08 18:48:19 发布

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本文介绍了解决Android开发中EditText在屏幕旋转时游标消失的问题。通过调用requestFocus()方法，确保EditText在屏幕方向改变后仍能保持焦点，从而使得光标可见。

做横竖屏切换时发现,edittext在切换时游标消失,通过设置EditText.setCursorVisible()和EditText.setFocusable()都没有效果,最后查源码发现通过EditText.requsetFocus()可以实现效果

/**
 * Call this to try to give focus to a specific view or to one of its
 * descendants.
 *
 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns
 * false), or if it is focusable and it is not focusable in touch mode
 * ({@link #isFocusableInTouchMode}) while the device is in touch mode.
 *
 * See also {@link #focusSearch(int)}, which is what you call to say that you
 * have focus, and you want your parent to look for the next one.
 *
 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments
 * {@link #FOCUS_DOWN} and <code>null</code>.
 *
 * @return Whether this view or one of its descendants actually took focus.
 */
public final boolean requestFocus() {
    return requestFocus(View.FOCUS_DOWN);
}