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();

        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=;i<=;i++){

                            myAdapter.addData(i,"new"+i);

                        }

                        myAdapter.notifyItemRangeChanged(,);

                        mRecyclerView.scrollToPosition();

                        //刷新完成,必须调用，否则会一直是圈圈转转的情况

                        swipeRefreshLayout.setRefreshing(false);

                    }

                },);

            }

        });

    }

    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");

    }

}