Android编程之仿iPhone滚轮控件
openkk
12年前
网上看到有人写了一个滚动组件，这个不错，大家可以看看
但是，我个人觉得这里有一处不是很好，大家可以试试：不循环的情况下，如果就是最后一个选项，你把它移到最上或者最下的位置，它回滚回到选择条时，是直接跳过去的，而不是自然滑动过去的，这个需要改进一下！
这三张图分别是使用滚动控件实现城市，随机数和时间三个简单的例子，当然，界面有点简陋，下面我们就以时间这个为例，开始解析一下。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:orientation="vertical" android:background="@drawable/layout_bg" android:layout_width="fill_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="24dp" android:layout_gravity="center_horizontal" android:textSize="20sp" android:text="Please select the city" /> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_width="fill_parent" android:paddingLeft="12dp" android:paddingRight="12dp" android:paddingTop="4dp" android:layout_marginTop="8dp" android:orientation="horizontal"> <kankan.wheel.widget.WheelView android:id="@+id/country" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" /> <kankan.wheel.widget.WheelView android:id="@+id/city" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_marginLeft="10dp" android:layout_weight="1.5" /> </LinearLayout> <!-- Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginTop="18dp" android:textSize="18sp" android:text=" Next > "/ --> </LinearLayout>
package kankan.wheel.demo; import kankan.wheel.R; import kankan.wheel.widget.ArrayWheelAdapter; import kankan.wheel.widget.OnWheelChangedListener; import kankan.wheel.widget.WheelView; import android.app.Activity; import android.os.Bundle; public class CitiesActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.cities_layout); WheelView country = (WheelView) findViewById(R.id.country); String countries[] = new String[] {"USA", "Canada", "Ukraine", "France"}; country.setVisibleItems(3); country.setAdapter(new ArrayWheelAdapter<String>(countries)); final String cities[][] = new String[][] { new String[] {"New York", "Washington", "Chicago", "Atlanta", "Orlando"}, new String[] {"Ottawa", "Vancouver", "Toronto", "Windsor", "Montreal"}, new String[] {"Kiev", "Dnipro", "Lviv", "Kharkiv"}, new String[] {"Paris", "Bordeaux"}, }; final WheelView city = (WheelView) findViewById(R.id.city); city.setVisibleItems(5); country.addChangingListener(new OnWheelChangedListener() { public void onChanged(WheelView wheel, int oldValue, int newValue) { city.setAdapter(new ArrayWheelAdapter<String>(cities[newValue])); city.setCurrentItem(cities[newValue].length / 2); } }); country.setCurrentItem(2); } }转自：http://blog.csdn.net/xyz_fly/article/details/7818288