XLlistView的使用

来源：互联网发布：linux怎么启动vim 编辑：程序博客网时间：2024/06/09 23:07

**public class ImagerUtil {
public static void initImageLoader(Context context)public class MainActivity extends AppCompatActivity {

private ViewPager pager;private XListView xlv;private int index=3;private String part="http://api.tianapi.com/tiyu/?key=36bafe109f1b68cc2c3829db69c7c180&num=";private String url=part+index;private int type=1;private List<Bean.NewslistBean> data=new ArrayList<>();public MyAdapter adapter1;private Handler handler=new Handler(){    @Override    public void handleMessage(Message msg) {        super.handleMessage(msg);        if (msg.what==0)        {            int item = pager.getCurrentItem();            pager.setCurrentItem(item+1);            handler.sendEmptyMessageDelayed(0,1000);        }    }};@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    pager = findViewById(R.id.pager);    xlv = findViewById(R.id.xlv);    if (TextUtil.iscon(MainActivity.this))    {        MyTask task = new MyTask(new MyTask.Back() {            @Override            public void setDate(String s) {                List<String> litt=new ArrayList<>();                Gson gson = new Gson();                Bean json = gson.fromJson(s, Bean.class);                List<Bean.NewslistBean> beans = json.getNewslist();                for (int i=0;i<beans.size();i++)                {                    litt.add(beans.get(i).getPicUrl());                }                MnAdapter adapter=new MnAdapter(MainActivity.this,litt);                pager.setAdapter(adapter);                handler.sendEmptyMessageDelayed(0,1000);            }        });        task.execute("http://api.tianapi.com/tiyu/?key=36bafe109f1b68cc2c3829db69c7c180&num=10");        xlv.setPullRefreshEnable(true);        xlv.setPullLoadEnable(true);        xlv.setXListViewListener(new XListView.IXListViewListener() {            @Override            public void onRefresh() {                index=3;                url=part+index;                type=1;                requestData();            }            @Override            public void onLoadMore() {                index++;                url=part+index;                type=2;                requestData();            }        });        xlv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {            @Override            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent(MainActivity.this,Main2Activity.class);                startActivity(intent);                return true;            }        });        requestData();    }else {        TextUtil.open(MainActivity.this);    }}private void requestData() {            MyTask task1 = new MyTask(new MyTask.Back() {        @Override        public void setDate(String s) {            Gson gson = new Gson();            Bean json = gson.fromJson(s, Bean.class);            if (type==1)            {                data.clear();            }            data.addAll(json.getNewslist());            if (adapter1==null)            {                adapter1=new MyAdapter(MainActivity.this,data);                xlv.setAdapter(adapter1);            }else {                adapter1.notifyDataSetChanged();            }            if (type==1)                {                xlv.stopRefresh();            }else {                xlv.stopLoadMore();            }        }    });    task1.execute(url);}

}

{    //自定义磁盘缓存路径  系统默认的缓存路径 sd...<package>..cache  当app被卸载时，此路径下的缓存图片一并被删除    //File cacheDir=getExternalC## 标题 ##acheDir();    File cacheDir= new File(Environment.getExternalStorageDirectory().getPath()+"/aaa");//自定义 sd卡的缓存路径    //第一步：对ImageLoader进行初使化    ImageLoaderConfiguration config2 = new ImageLoaderConfiguration.Builder(context)            .threadPriority(Thread.NORM_PRIORITY - 2)            .denyCacheImageMultipleSizesInMemory()            .discCacheFileNameGenerator(new Md5FileNameGenerator())            .tasksProcessingOrder(QueueProcessingType.LIFO)            .build();    ImageLoader.getInstance().init(config2);}public  static  DisplayImageOptions getImageOption(Context context){    DisplayImageOptions  options = new DisplayImageOptions.Builder()            .showStubImage(R.mipmap.ic_launcher)        // 加载开始默认的图片        .showImageForEmptyUri(R.mipmap.ic_launcher)     //url爲空會显示该图片，自己放在drawable里面的        .showImageOnFail(R.mipmap.ic_launcher)                //加载图片出现问题，会显示该图片        .cacheInMemory()                                               //缓存用        .cacheOnDisc()                                                    //缓存用        .displayer(new RoundedBitmapDisplayer(5))       //图片圆角显示，值为整数        .build();    return  options;}

}
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