android开发之SwipeListView的使用

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 ;
    }
}

本项目完整代码下载http://pan.baidu.com/s/1o6knuUA

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