TabLayout结合ListView切换改变数据并且监听

前言

项目中经常会用到选项卡，目的就是节省空间，然后切换的时候根据当前选项展示不同的内容，今天我们来介绍一种实现方式，先看效果图

这里采用的是TabLayout结合ListView进行数据的展示和点击切换，下面来看看是如何实现的。

代码

首先我们看布局文件

<RelativeLayout
    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.support.design.widget.TabLayout
        android:id="@+id/tl_top_indicator"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabIndicatorColor="@android:color/holo_green_light"
        app:tabSelectedTextColor="@android:color/holo_red_dark"
        app:tabTextColor="@android:color/black"
        app:tabTextAppearance="@style/TabLayoutTextStyle"
        app:tabIndicatorHeight="4dp"
        >
    android.support.design.widget.TabLayout>
    <ListView
        android:id="@+id/lv_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/tl_top_indicator"
        >
    ListView>
RelativeLayout>

布局文件中重点就是指定了TabLayout的一些样式，具体每个属性的作用大家下来可以了解一下，这里就不详细说明了，很简单那。

然后我们看每个条目的adapter，这里将条目点击监听通过回调的方式进行编写，方便我们控制，这里我们监听当前点击的位置

public class CustomAdapter extends BaseAdapter {
    private Context context;
    private List datas;
    private OnItemSelectListener mListener;
    public interface OnItemSelectListener{
        void onItemSelect(int position);
    }
    public void setOnItemSelectListener(OnItemSelectListener listener){
        mListener = listener;
    }

    public CustomAdapter(Context context,List datas){
        this.context = context;
        this.datas = datas;
    }
    @Override
    public int getCount() {
        return datas.size();
    }

    @Override
    public Object getItem(int position) {
        return datas.get(position);
    }

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

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View view = View.inflate(context, R.layout.list_item_layout, null);
        TextView itemView = (TextView) view.findViewById(R.id.lv_item);
        itemView.setText(datas.get(position));
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mListener.onItemSelect(position);
            }
        });
        return view;
    }
}

public class MainActivity extends AppCompatActivity implements CustomAdapter.OnItemSelectListener{


    private TabLayout tabLayout;
    private ListView listView;
    private String[] tabTitles = {"今天","昨天","本周","本月"};
    private List tabTitleList;
    private CustomAdapter adapter;
    private List lvDatas1 = new ArrayList<>();
    private List lvDatas2 = new ArrayList<>();
    private List lvDatas = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tabLayout = (TabLayout) findViewById(R.id.tl_top_indicator);
        listView = (ListView) findViewById(R.id.lv_content);
        initDatas();
        adapter = new CustomAdapter(this, lvDatas);
        listView.setAdapter(adapter);
        adapter.setOnItemSelectListener(this);
        initTabLayout();
    }
    public void initDatas(){
        lvDatas1.add("A");
        lvDatas1.add("B");
        lvDatas1.add("C");
        lvDatas1.add("D");
        lvDatas2.add("1");
        lvDatas2.add("2");
        lvDatas2.add("3");
        lvDatas2.add("4");
        lvDatas.addAll(lvDatas1);
    }
    public void initTabLayout(){
        tabTitleList = Arrays.asList(tabTitles);
        tabLayout.setTabMode(TabLayout.MODE_FIXED);
        for (int i = 0; i < tabTitleList.size(); i++) {
            tabLayout.addTab(tabLayout.newTab().setText(tabTitleList.get(i)),i);
        }
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                lvDatas.clear();
                switch (tab.getPosition()){
                    case 0:
                        lvDatas.addAll(lvDatas1);
                        break;
                    default:
                        lvDatas.addAll(lvDatas2);
                        break;
                }
                adapter.notifyDataSetChanged();
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }

    @Override
    public void onItemSelect(int position) {
        String result = lvDatas.get(position);
        Toast.makeText(this, result, Toast.LENGTH_SHORT).show();
    }
}