[英]How to increase clickable area for thumb of a seekbar in android?
我在应用程序中使用了搜索栏。 我如何在不增加其宽度和高度的情况下增加搜索杆拇指的触摸面积? 用户发现很难使用默认的拇指大小,因此必须增加触摸面积才能获得良好的用户体验。
<SeekBar
android:id="@+id/seek_bar_song_progress"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/padding_left_margin"
android:layout_weight="2.8"
android:gravity="center_vertical"
android:maxHeight="@dimen/slider_width"
android:progress="0"
style="?attr/seekbar_style"
android:thumbOffset="0dp"
android:max="@integer/song_progress_bar_upper_range"
android:contentDescription="@string/img_volumeslider"/>
使用以下代码,可以增加任何视图可点击区域:
public static void increaseClickArea(View parent, View child) {
// increase the click area with delegateArea, can be used in + create
// icon
final View chicld = child;
parent.post(new Runnable() {
public void run() {
// Post in the parent's message queue to make sure the
// parent
// lays out its children before we call getHitRect()
Rect delegateArea = new Rect();
View delegate = chicld;
delegate.getHitRect(delegateArea);
delegateArea.top -= 600;
delegateArea.bottom += 600;
delegateArea.left -= 600;
delegateArea.right += 600;
TouchDelegate expandedArea = new TouchDelegate(delegateArea,
delegate);
// give the delegate to an ancestor of the view we're
// delegating the
// area to
if (View.class.isInstance(delegate.getParent())) {
((View) delegate.getParent())
.setTouchDelegate(expandedArea);
}
};
});
}
这是完整的演示代码
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