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我有一个带有箭头指示的画廊,显示左侧或右侧是否有图像。Android - Gallery.onItemSelected()导致滚动以捕捉到
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/black"
android:layout_weight="1" >
<com.package.views.MyGallery
android:id="@+id/carGallery"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:spacing="2dip"
android:fadingEdge="none" />
<ImageView
android:id="@+id/prev"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="@drawable/left_orange_arrow"
android:paddingLeft="25dip" />
<ImageView
android:id="@+id/next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:src="@drawable/right_orange_arrow"
android:paddingRight="25dip" />
</RelativeLayout>
我更新的箭头这样:
carGallery.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> adapter, View view, final int position, long id) {
Car car = carAdapter.getCar(position);
top.setText(car.nickname);
bottom.setText(car.year+" "+car.make+" "+car.model);
if(carAdapter.getItems().size() == 1) {
prev.setVisibility(View.GONE);
next.setVisibility(View.GONE);
}
else if(position == 0) {
prev.setVisibility(View.GONE);
next.setVisibility(View.VISIBLE);
}
else if(position == carAdapter.getItems().size()-1) {
prev.setVisibility(View.VISIBLE);
next.setVisibility(View.GONE);
}
else {
prev.setVisibility(View.VISIBLE);
next.setVisibility(View.VISIBLE);
}
}
});
任何时候,我改变箭头的知名度,画廊捕捉到刚刚滚动到选择的项目。我知道Gallery.onItemSelected()会导致捕捉,因为当我执行Gallery.setCallbackDuringFling(false)时,它不会在捕捉到最后一个项目之前进行捕捉。
我能做些什么来阻止Gallery像这样捕捉?
在此先感谢!