实现一种类似于qq中滑动列表的功能：
向左或者向右滑动，然后执行相关操作。
这里用到的是GitHub上的开源控件SwipeListView，下载地址https://github.com/47deg/android-swipelistview，下载好了之后，我们可以把下载文件当作一个库文件引用它，当然也可以直接把源代码拷贝到我们的想木当中。SwipeListView还依赖一个Github上的第三方控件，叫做NineOldAndroids,下载地址https://github.com/JakeWharton/NineOldAndroids，nineoldandroids和swipelistview一样，也是可以直接拷贝代码进来或者当作一个库文件来引用。本案例统一把他们都当作库文件来引用。
先来看activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:swipe="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<com.fortysevendeg.swipelistview.SwipeListView
android:id="@+id/example_lv_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:listSelector="#00000000"
swipe:swipeActionLeft="dismiss"
swipe:swipeActionRight="reveal"
swipe:swipeAnimationTime="0"
swipe:swipeBackView="@+id/back"
swipe:swipeCloseAllItemsWhenMoveList="true"
swipe:swipeFrontView="@+id/front"
swipe:swipeMode="both"
swipe:swipeOffsetLeft="0dp"
swipe:swipeOffsetRight="0dp"
swipe:swipeOpenOnLongPress="false" />
</RelativeLayout>这里就一个swipelistview控件，我说几个不易理解的属性
表示滑动时的操作，dismiss表示滑动时删除，如果设置为reveal表示滑动时会显示出item后面的选项
swipe:swipeActionLeft=”dismiss”
swipe:swipeActionRight=”reveal”
这个是背面布局的id（我们把直接看到的布局叫做前面的，滑动之后才能看到的布局叫做背面的），必须与背面布局id对应
swipe:swipeBackView=”@+id/back”
这个是滚动时候是否关闭背面的布局，true表示关闭，false表示不关闭，一般设置为true
swipe:swipeCloseAllItemsWhenMoveList=”true”
这个是前面布局的id，要与布局的id对应
swipe:swipeFrontView=”@+id/front”
both表示可以向左滑也可以向右滑，right和left分别表示只能向有或者向左滑动。
swipe:swipeMode=”both”
下面两个表示向左或者向右滑动时的偏移量，一般不在xml文件中设置，而是在代码中根据设置的大小来设置偏移量。
swipe:swipeOffsetLeft=”0dp”
swipe:swipeOffsetRight=”0dp”
再来看看Item布局文件，这里包括前面的和后面的，两个重叠在一起：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<!-- linearlayout中的布局是每一项后面隐藏的布局 -->
<LinearLayout
android:id="@+id/back"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="#eee"
android:tag="back" >
<Button
android:id="@+id/example_row_b_action_1"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:layout_marginRight="10dp"
android:layout_weight="1"
android:text="测试" />
<Button
android:id="@+id/example_row_b_action_2"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:layout_weight="1"
android:text="删除" />
<Button
android:id="@+id/example_row_b_action_3"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:layout_weight="1"
android:text="编辑" />
</LinearLayout>
<!-- 这里是前台显示的布局 -->
<RelativeLayout
android:id="@+id/front"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="#ffffff"
android:orientation="vertical"
android:tag="front" >
<TextView
android:id="@+id/example_row_tv_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textSize="18sp" />
</RelativeLayout>
</FrameLayout>这个布局是一个常规布局，我就不解释了。
MainActivity.java，关键地方都有注释
public class MainActivity extends Activity {
private SwipeListView mSwipeListView ;
private SwipeAdapter mAdapter ;
public static int deviceWidth ;
private List<String> testData ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSwipeListView = (SwipeListView) findViewById(R.id.example_lv_list);
testData = getTestData();
//数据适配
mAdapter = new SwipeAdapter(this, R.layout.package_row, testData,mSwipeListView);
//拿到设备宽度
deviceWidth = getDeviceWidth();
mSwipeListView.setAdapter(mAdapter);
//设置事件监听
mSwipeListView.setSwipeListViewListener( new TestBaseSwipeListViewListener());
reload();
}
private List<String> getTestData() {
String [] obj = new String[]{"红楼梦","西游记","水浒传","管锥编","宋诗选注","三国演义","android开发高级编程","红楼梦","西游记","水浒传","管锥编","宋诗选注","三国演义","android开发高级编程"};
List<String> list = new ArrayList<String>(Arrays.asList(obj));
return list;
}
private int getDeviceWidth() {
return getResources().getDisplayMetrics().widthPixels;
}
private void reload() {
// mSwipeListView.setSwipeMode(SwipeListView.SWIPE_MODE_LEFT);
// mSwipeListView.setSwipeActionLeft(SwipeListView.SWIPE_ACTION_REVEAL);
// mSwipeListView.setSwipeActionRight(settings.getSwipeActionRight());
//滑动时向左偏移量，根据设备的大小来决定偏移量的大小
mSwipeListView.setOffsetLeft(deviceWidth * 1 / 3);
mSwipeListView.setOffsetRight(deviceWidth * 1 / 3);
// mSwipeListView.setOffsetRight(convertDpToPixel(settings.getSwipeOffsetRight()));
//设置动画时间
mSwipeListView.setAnimationTime(30);
mSwipeListView.setSwipeOpenOnLongPress(false);
}
class TestBaseSwipeListViewListener extends BaseSwipeListViewListener{
//点击每一项的响应事件
@Override
public void onClickFrontView(int position) {
super.onClickFrontView(position);
Toast.makeText(getApplicationContext(), testData.get(position), Toast.LENGTH_SHORT).show();
}
//关闭事件
@Override
public void onDismiss(int[] reverseSortedPositions) {
for (int position : reverseSortedPositions) {
Log.i("lenve", "position--:"+position);
testData.remove(position);
}
mAdapter.notifyDataSetChanged();
}
}
}数据适配器：
public class SwipeAdapter extends ArrayAdapter<String> {
private LayoutInflater mInflater ;
private List<String> objects ;
private SwipeListView mSwipeListView ;
public SwipeAdapter(Context context, int textViewResourceId,List<String> objects, SwipeListView mSwipeListView) {
super(context, textViewResourceId, objects);
this.objects = objects ;
this.mSwipeListView = mSwipeListView ;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null ;
if(convertView == null){
convertView = mInflater.inflate(R.layout.package_row, parent, false);
holder = new ViewHolder();
holder.mFrontText = (TextView) convertView.findViewById(R.id.example_row_tv_title);
holder.mBackEdit = (Button) convertView.findViewById(R.id.example_row_b_action_3);
holder.mBackDelete = (Button) convertView.findViewById(R.id.example_row_b_action_2);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.mBackDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//关闭动画
mSwipeListView.closeAnimate(position);
//调用dismiss方法删除该项（这个方法在MainActivity中）
mSwipeListView.dismiss(position);
}
});
String item = getItem(position);
holder.mFrontText.setText(item);
return convertView;
}
class ViewHolder{
TextView mFrontText ;
Button mBackEdit,mBackDelete ;
}
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