Material Design控件使用学习 TabLayout+SwipeRefreshlayout

　　效果：

　　

　　Tablayout有点类似之前接触过的开源ViewPagerIndicator，将其与viewpager绑定，可实现viewpager的导航功能。

　　SwipeRefreshLayout是官方出的下拉刷新控件。

　1.　导入design包，Recyclerview包。

　　activity_main布局。

　　将Tablayout置于Viewpager之上。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <android.support.design.widget.TabLayout
        android:id="@+id/tabLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabMode="scrollable"
        />

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#ffffff"
        />
</LinearLayout>

　　2.MainActivity。

　　通过tabLayout.setupWithViewPager(viewPager);直接自动完成绑定，当然也有单独给每个Tab设置的方法，但是不如这样简单。

　　也还可以在代码或xml布局中给tablayout设置样式。

　　通过Adapter中getPageTitle（）方法确定Tab的名称。

package com.example.xw.tablayout;

import android.content.Context;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {
    private ViewPager mViewPager;
    private TabLayout mTabLayout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ViewPager viewPager= (ViewPager) findViewById(R.id.viewPager);
        MyAdapter adapter=new MyAdapter(getSupportFragmentManager(),this);
        viewPager.setAdapter(adapter);
        TabLayout tabLayout= (TabLayout) findViewById(R.id.tabLayout);

        tabLayout.setupWithViewPager(viewPager);
    }

    class MyAdapter extends FragmentPagerAdapter{
        private String[] titles=new String[]{"Tab1","Tab2","Tab3","Tab4","Tab5","Tab6"};
        private Context mContext;
        public MyAdapter(FragmentManager fm, Context context) {
            super(fm);
            mContext=context;
        }

        @Override
        public Fragment getItem(int position) {
            return PageFragment.newInstance(position+1);
        }

        @Override
        public int getCount() {
            return titles.length;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return titles[position];
        }
    }
}

　　3.fragment的布局

　　将Recyclerview作为SwipeRefreshLayout的child

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/swipeLayout"
   android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

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

　　Recyclerview的item布局

　　这里简单的用一个textview.

　　rv_item

　　

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/rv_item"
          android:textSize="20sp"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="item">

</TextView>

　　PagerFragment

　　通过swipeRefreshLayout.setOnRefreshListener监听刷新事件，在onRefresh()里开启一个线程去修改adapter的数据，发送message，在主线程的handler

　　的handleMessage中，通过swipeRefreshLayout.setRefreshing(false); mMyAdapter.notifyDataSetChanged();停止刷新动画和设置Adapter刷新。

package com.example.xw.tablayout;

import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.PagerAdapter;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * Created by xw on 2016/9/2.
 */
public class PageFragment extends Fragment {
    public static final String ARGS_PAGE="argspage";
    private int mPage;
    private RecyclerView mRecyclerView;
    private MyAdapter mMyAdapter;
    private SwipeRefreshLayout swipeRefreshLayout;
    private String data="刷新前";

    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case 1:

                    swipeRefreshLayout.setRefreshing(false);
                    mMyAdapter.notifyDataSetChanged();
                    //swipeRefreshLayout.setEnabled(false);
                    break;
                default:
                    break;
            }
        }
    };
    public static PageFragment newInstance(int page){
        Bundle args=new Bundle();
        args.putInt(ARGS_PAGE,page);
        PageFragment fragment=new PageFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mPage=getArguments().getInt(ARGS_PAGE);
        mMyAdapter=new MyAdapter();
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
      View view=inflater.inflate(R.layout.fragment,container,false);
        swipeRefreshLayout = (SwipeRefreshLayout)view.findViewById(R.id.swipeLayout);
        swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);
      swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
          @Override
          public void onRefresh() {
              new Thread(new Runnable() {
                  @Override
                  public void run() {
                      data="刷新后";
                      try {
                          Thread.sleep(5000);
                      } catch (InterruptedException e) {
                          e.printStackTrace();
                      }

                      mHandler.sendEmptyMessage(1);
                  }
              }).start();
          }
      });

        mRecyclerView= (RecyclerView) view.findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        mRecyclerView.setAdapter(mMyAdapter);
        return view;

    }
    class MyAdapter extends RecyclerView.Adapter<MyHolder>{

        @Override
        public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v=LayoutInflater.from(getActivity()).inflate(R.layout.rv_item,parent,false);
            return new MyHolder(v);
        }

        @Override
        public void onBindViewHolder(MyHolder holder, int position) {
                holder.mTextView.setText(""+data+"第"+mPage+"页："+position);
        }

        @Override
        public int getItemCount() {
            return 100;
        }
    }

    class MyHolder extends RecyclerView.ViewHolder{
        private TextView mTextView;
        public MyHolder(View itemView) {
            super(itemView);
            mTextView= (TextView) itemView;

        }
    }
}