如何停止滚动画廊? [英] how to stop scrolling gallery?
问题描述
我在 RelativeLayout
中有一个画廊(图像),如果用户点击它,三个 Buttons
和一个 TextView
出现.我用可见属性做了它,这意味着三个 Buttons
和 TextView
在 xml 文件中被声明为不可见,然后是 onClick()<
Gallery
的/code> 使其与 setVisibility(0)
可见.这很好用,但我希望 Gallery
在Buttons
和 TextView
在前面.
I've got a gallery (images) in a RelativeLayout
and if the users click on it, three Buttons
and a TextView
appears. I made it with the visible-property, that means the three Buttons
and the TextView
are declared as invisible in the xml-file and later the onClick()
of the Gallery
makes it visible with setVisibility(0)
.That works fine, but I want the Gallery
to stop scrolling during the Buttons
and the TextView
are in front.
有没有办法做到这一点?
Is there any way to do this?
推荐答案
如果你希望能够启用/禁用画廊的滚动,你可以使用这样的类:
If you want to be able to enable/disable scrolling of the Gallery, you could use class like this:
public class ExtendedGallery extends Gallery {
private boolean stuck = false;
public ExtendedGallery(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public ExtendedGallery(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ExtendedGallery(Context context) {
super(context);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return stuck || super.onTouchEvent(event);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_LEFT:
case KeyEvent.KEYCODE_DPAD_RIGHT:
return stuck || super.onKeyDown(keyCode, event);
}
return super.onKeyDown(keyCode, event);
}
public void setScrollingEnabled(boolean enabled) {
stuck = !enabled;
}
}
根据 Gallery 源代码,有两种事件类型可以启动滚动:屏幕触摸和在方向键上按下的键.所以如果你想禁用滚动,你可以拦截这些事件.然后在你的布局中使用这样的东西:
According to the Gallery source code, there are two event types that start the scrolling: screen touch and the key, pressed on D-pad. So you could intercept these events if you want to disable scrolling. Then use something like this in your layout:
<your.package.name.ExtendedGallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
然后您可以随时启用/禁用该画廊的滚动:
Then you can enable/disable scrolling of that gallery at any time:
ExtendedGallery mGallery = (ExtendedGallery) findViewById(R.id.gallery);
mGallery.setScrollingEnabled(false); // disable scrolling
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