安卓下拉刷新空间SwipeRefreshLayout的基本使用

1.先写布局文件

 <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/refresh"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/my_recycler_view"
            android:scrollbars="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </android.support.v4.widget.SwipeRefreshLayout>

2.mainactivity

public class MainActivity extends AppCompatActivity {
    private OkHttpHelper httpHelper  =OkHttpHelper.getInstance();
    private SwipeRefreshLayout swipeRefreshLayout;
    @ViewInject(R.id.tv)
    private TextView tv;

    private RecyclerView mRecyclerView;
    private ArrayList<String> mDatas=new ArrayList<>();
    private MyAdapter myAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRecyclerView = findViewById(R.id.my_recycler_view);
        initDatas();
        myAdapter =new MyAdapter(mDatas);
        mRecyclerView.setAdapter(myAdapter);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        //mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));
        // mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.HORIZONTAL));
        //配置分割线
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));
        //事件监听



        int size =mDatas.size();
        //添加数据到头部
        myAdapter.addData(size,"adddddddddd");

        //删除数据
        myAdapter.removeData(0);



        swipeRefreshLayout = findViewById(R.id.refresh);
        initRefreshLayout();
    }

    private void initRefreshLayout(){
        //转的圈圈的颜色
        swipeRefreshLayout.setColorSchemeResources(R.color.colorPrimary);

        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                Log.d(TAG, "onRefresh: "+swipeRefreshLayout.isRefreshing());
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        for(int i=0;i<=10;i++){
                            myAdapter.addData(i,"new"+i);
                        }
                        myAdapter.notifyItemRangeChanged(0,10);

                        mRecyclerView.scrollToPosition(0);
                        //刷新完成,必须调用，否则会一直是圈圈转转的情况
                        swipeRefreshLayout.setRefreshing(false);
                    }
                },2000);
            }
        });
    }

    private static final String TAG = "MainActivity";
    private void initDatas(){
        mDatas.add("aa");
        mDatas.add("cv");
        mDatas.add("cv1");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
        mDatas.add("cv112");
    }


}