Table和ViewPager混合使用小结

本章节讲述Table和ViewPager混合使用以达到滑动页面的效果。

代码就不详细介绍了，里面每一句都有注释。

1.在布局文件中添加相应的控件：TabLayout和ViewPager

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    app:layout_behavior="@string/appbar_scrolling_view_behavior"    tools:showIn="@layout/activity_main" tools:context=".MainActivity">    <!--布局页面写入两个控件TabLayout，ViewPager将两个控件相结合-->    <android.support.design.widget.TabLayout        android:id="@+id/tab_layout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        />    <android.support.v4.view.ViewPager        android:id="@+id/pager"        android:layout_width="match_parent"        android:layout_height="fill_parent"        android:layout_below="@id/tab_layout"        /></RelativeLayout>

2.主函数程序

public class MainActivity extends AppCompatActivity {    /*界面的数量和各自界面名称设置*/    private static final int NUMBER_OF_FRAGMENTS = 4;/*四个部分*/    private static final int FRAGMENT_INDEXT_SETTING = 0;/*配置部分*/    private static final int FRAGMENT_INDEXT_LOGGER = 1;/*数据记录部分*/    private static final int FRAGMENT_INDEXT_OUTDOORMAP = 2;/*室外地图显示部分*/    private static final int FRAGMENT_INDEXT_INDOORMAP = 3;/*室内定位部分*/    /*定义一个包含权限的字符串数组，将需要的权限全部写到数组中*/    private static final String[] REQUIRED_PERMISSIONS = {            Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE    };    private static final int LOCATION_REQUEST_ID = 1;/*方法地一个参数，未解决*/    private Fragment[] mFragments;/*用于存放要使用的Fragment*/    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)                        .setAction("Action", null).show();            }        });        requestPermitionAndSetupFragment(this);    }    /*    * 用于选择使用当前使用哪一个页面的适配器类    * */    public class ViewPagerAdapter extends FragmentStatePagerAdapter{        /*下面这三个方法是必须要覆写的*/        /*构造函数*/        public ViewPagerAdapter(FragmentManager fm) {            super(fm);        }        /*获得页面的数量*/        @Override        public int getCount() {            return NUMBER_OF_FRAGMENTS;        }        /*通过这个方法得到当前页面的位置*/        @Override        public Fragment getItem(int position) {            switch(position){                case FRAGMENT_INDEXT_SETTING:                    return mFragments[FRAGMENT_INDEXT_SETTING];/*返回设置界面*/                case FRAGMENT_INDEXT_LOGGER:                    return mFragments[FRAGMENT_INDEXT_LOGGER];/*返回记录数据界面*/                case FRAGMENT_INDEXT_OUTDOORMAP:                    return mFragments[FRAGMENT_INDEXT_OUTDOORMAP];/*返回室外定位地图界面*/                case FRAGMENT_INDEXT_INDOORMAP:                    return mFragments[FRAGMENT_INDEXT_INDOORMAP];/*返回室内定位地图界面*/                default:                    throw new IllegalArgumentException("Invalid section: " + position);/*抛出错误*/            }        }        /*获得标题*/        @Override        public CharSequence getPageTitle(int position) {            switch(position){                case FRAGMENT_INDEXT_SETTING:                    return "配置";/*返回设置界面*/                case FRAGMENT_INDEXT_LOGGER:                    return "数据记录";/*返回记录数据界面*/                case FRAGMENT_INDEXT_OUTDOORMAP:                    return "室外定位";/*返回室外定位地图界面*/                case FRAGMENT_INDEXT_INDOORMAP:                    return "室内定位";/*返回室内定位地图界面*/                default:                    throw new IllegalArgumentException("Invalid section: " + position);/*抛出错误*/            }        }    }    /*    * 启动Fragment    * */    private void setupFragment(){        mFragments = new Fragment[NUMBER_OF_FRAGMENTS];/*设置Fragment的数量*/        /*SettingFragment设置*/        SettingFragment settingFragment = new SettingFragment();        mFragments[FRAGMENT_INDEXT_SETTING] = settingFragment;        /*        * 以下设置使用到的Fragment        * */        /*LoggerFragment设置*/        LoggerFragment loggerFragment = new LoggerFragment();        mFragments[FRAGMENT_INDEXT_LOGGER] = loggerFragment;        /*OutdoorMapFragment设置*/        OutdoorMapFragment outdoorMapFragment = new OutdoorMapFragment();        mFragments[FRAGMENT_INDEXT_OUTDOORMAP] = outdoorMapFragment;        /*IndoorMapFragment设置*/        IndoorMapFragment indoorMapFragment = new IndoorMapFragment();        mFragments[FRAGMENT_INDEXT_INDOORMAP] = indoorMapFragment;        ViewPager viewPager = (ViewPager)findViewById(R.id.pager);/*创建ViewPager对象*/        viewPager.setOffscreenPageLimit(4);/*设置界面的页数为4*/        ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());/*通过构造函数构造页面适配器*/        viewPager.setAdapter(adapter);/*将ViewPager设置一个适配器PagerAdapter*/        TabLayout tabLayout = (TabLayout)findViewById(R.id.tab_layout);/*创建一个TabLayout类的对象*/        tabLayout.setupWithViewPager(viewPager);/*使用ViewPager启动TabLayout*/        /*一旦TabLayout的位置发生改变就会添加一个TabLayout上的页面选择监听器*/        tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager));        /*无论页面发生变化或则反卷都会添加一个页面变化监听器*/        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));    }    /*    * 查询是否具有相应的权限    * */    private Boolean hasPermission(Activity activity){        /*如果版本号小于Android6.0,不需要判断，直接返回真*/        if(Build.VERSION.SDK_INT < Build.VERSION_CODES.M){            return true;        }        /*如果有任何一项权限没有获得就返回false*/        for(String p : REQUIRED_PERMISSIONS){            if(ContextCompat.checkSelfPermission(activity,p) != PackageManager.PERMISSION_GRANTED){                return false;            }        }        return true;    }    /*    * 查询是否具有相应的权限以及启动Fragment    * */    private void requestPermitionAndSetupFragment(final Activity activity){       /*如果获得所有的权限，就直接启动Fragment*/        if(hasPermission(activity)){            setupFragment();        }else{            ActivityCompat.requestPermissions(activity, REQUIRED_PERMISSIONS, LOCATION_REQUEST_ID);        }    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        //noinspection SimplifiableIfStatement        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

3.结果图

注意的问题：

这里需要注意的是Fragment和FragmentStatePagerAdapter要导入的包是

import android.app.Fragment;import android.app.FragmentManager;import android.support.v13.app.FragmentStatePagerAdapter;

误将TabLayout写成TableLayout。