pulltorefresh上拉，下拉

最新推荐文章于 2018-12-20 18:50:36 发布

原创最新推荐文章于 2018-12-20 18:50:36 发布 · 110 阅读

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CC 4.0 BY-SA版权

本文介绍了一个基于PullToRefreshListView实现上拉加载和下拉刷新功能的示例。通过MainActivity展示了如何设置布局、初始化组件及实现刷新逻辑。

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//布局

</LinearLayout>

//MainActivity

public class MainActivity extends AppCompatActivity {

    private PullToRefreshListView listView;
    private List<String> names = new ArrayList<>();
    private MyAdapter myAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initViews();
        names.add("张三");
        myAdapter = new MyAdapter(names);
        listView.setAdapter(myAdapter);
    }

    private void initViews() {
        listView = findViewById(R.id.pull_to_refresh_listview);
        //设置，上啦和下拉都可以
        listView.setMode(PullToRefreshBase.Mode.BOTH);
        //设置监听
        listView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                //下拉刷新
                new Thread(){
                    @Override
                    public void run() {
                        try {
                            Thread.sleep(2000);
                            names.clear();
                            names.add("下拉刷新");

                            //记得关闭头布局
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    myAdapter.notifyDataSetChanged();
                                    listView.onRefreshComplete();
                                }
                            });

                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                    }
                }.start();

            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                //上啦刷新
                new Thread(){
                    @Override
                    public void run() {
                        try {
                            Thread.sleep(2000);
                            names.add("上啦刷新---");

                            //记得关闭头布局
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    myAdapter.notifyDataSetChanged();
                                    listView.onRefreshComplete();
                                }
                            });
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                    }
                }.start();

            }
        });

    }

    class MyAdapter extends BaseAdapter {

        private List<String> list;

        public MyAdapter(List<String> list) {
            this.list = list;
        }

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            TextView textView = new TextView(MainActivity.this);
            textView.setTextSize(25);
            textView.setText(list.get(position));
            return textView;
        }
    }
}