Listview getItemViewType的使用
ListView中有两个可以用来让ListView可以在视图中显示多种布局的方法，分别是getItemType和getViewTypeCount
其中
getItemViewType返回的是有参数position所决定的的view的id
getViewTypeCount，顾名思义，就是返回不同布局的数目
接下来我们要做的就是在getView方法中根据不同的itemType来创建正确的convertView
话不多说，先上图
主要代码：
Activity
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { ListView listView = (ListView) findViewById(R.id.listview); listView.setAdapter(new MySeparatorListAdapter(initData())); } private List<ListData> initData() { List<ListData> data = new ArrayList<MainActivity.ListData>(); for(int i = 0; i < 30; i ++) data.add(new ListData("标题:" + i, "内容:" + i, "作者:" + i)); return data; } }
Adapter类
class MySeparatorListAdapter extends BaseAdapter { private static final int TYPE_MAIN = 0; private static final int TYPE_SEPARATOR = 1; private static final int TYPE_COUNT = 2; private List<ListData> mData; private LayoutInflater mInflater; private TreeSet mSeparatorsSet = new TreeSet(); public MySeparatorListAdapter(List<ListData> data) { mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); mData = data; setSeparator(); } @SuppressWarnings("unchecked") private void setSeparator() { int index = 0; for(int i = 0, n = mData.size(); i < n; i ++) { if(i % 3 == 0) { //保存分界位置信息 mSeparatorsSet.add(i + index); mData.add(i + index, new ListData("分界" + index, null, null)); index ++; } } notifyDataSetChanged(); } @Override public int getItemViewType(int position) { return mSeparatorsSet.contains(position) ? TYPE_SEPARATOR : TYPE_MAIN; } @Override public int getViewTypeCount() { return TYPE_COUNT; } @Override public int getCount() { return mData.size(); } @Override public long getItemId(int position) { return position; } @Override public ListData getItem(int position) { return mData.get(position); } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; int type = getItemViewType(position); if (convertView == null) { holder = new ViewHolder(); switch (type) { case TYPE_MAIN: convertView = mInflater.inflate(R.layout.music_hot_review_item, null); holder.titleView = (TextView)convertView.findViewById(R.id.music_hot_review_musicname); holder.contentView = (TextView)convertView.findViewById(R.id.music_hot_review_review); holder.authorView = (TextView)convertView.findViewById(R.id.music_hot_review_username); break; case TYPE_SEPARATOR: convertView = mInflater.inflate(R.layout.separator_item, null); holder.titleView = (TextView)convertView.findViewById(R.id.separetor_title); break; } convertView.setTag(holder); } else { holder = (ViewHolder)convertView.getTag(); } switch (type) { case TYPE_MAIN: holder.titleView.setText(mData.get(position).getTitle().toString()); holder.contentView.setText(mData.get(position).getContent().toString()); holder.authorView.setText(mData.get(position).getAuthor().toString()); break; case TYPE_SEPARATOR: holder.titleView.setText(mData.get(position).getTitle().toString()); break; } return convertView; } }
xml代码：
主要布局：music_hot_review_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/list_rect_selector" android:orientation="vertical" > <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" > <ImageView android:id="@+id/music_hot_review_imageview" android:layout_width="70dp" android:layout_height="70dp" android:layout_marginLeft="5dp" android:layout_marginTop="5dp" android:scaleType="centerCrop" android:src="@drawable/music_image_default" /> <TextView android:id="@+id/music_hot_review_musicname" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginTop="5dp" android:layout_toRightOf="@id/music_hot_review_imageview" android:ellipsize="marquee" android:marqueeRepeatLimit="marquee_forever" android:singleLine="true" android:text="我好想你" android:textColor="@color/font_color" android:textSize="18sp" /> <TextView android:id="@+id/music_hot_review_username" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/music_hot_review_musicname" android:layout_marginLeft="13dp" android:layout_marginTop="2dp" android:layout_toRightOf="@id/music_hot_review_imageview" android:text="居来提" android:textColor="@color/font_color" android:textSize="16sp" /> <TextView android:id="@+id/music_hot_review_review" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/music_hot_review_username" android:layout_marginLeft="13dp" android:layout_marginRight="5dp" android:layout_marginTop="2dp" android:layout_toRightOf="@id/music_hot_review_imageview" android:paddingBottom="10dp" android:text="dsahdkasdh" android:textColor="@color/font_color" android:textSize="15sp" /> </RelativeLayout> </LinearLayout>
分界布局: separator_item.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp" > <TextView android:id="@+id/separetor_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:textSize="20sp" android:textColor="@color/my_green" android:text="分界" /> </RelativeLayout>
本文内容参考：http://www.cnblogs.com/xiaowenji/archive/2010/12/08/1900579.html
