Question

我正在试图弄清楚如何在每个标签中显示两个不同的数组列表，因为此时我的行星和星星数组列表并显示在我的所有标签下。

如果我为每个标签创建一个活动+类，那么我确实可以正确地使用它，但这样做太多了，无法为每个标签创建一个活动+类

如何在不同的标签中显示每个标签，例如行星标签下的行星数组列表和星标下标签是星形数组列表，但只是为所有标签重复使用相同的活动，但只为每个标签填充新的文本数据< / p>

这是我的主要活动：

public class MainActivity extends ActionBarActivity {

private Toolbar toolbar;
private ViewPager mPager;
private SlidingTabLayout mTabs;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    toolbar = (Toolbar) findViewById(R.id.app_bar);
    setSupportActionBar(toolbar);

    mPager= (ViewPager) findViewById(R.id.viewPager);
    mTabs=(SlidingTabLayout) findViewById(R.id.tabs);
    mPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
    mTabs.setDistributeEvenly(true);
    mTabs.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
    mTabs.setSelectedIndicatorColors(getResources().getColor(R.color.colorAccent));
    mTabs.setViewPager(mPager);
}


@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);
}

class MyPagerAdapter extends FragmentPagerAdapter {

    String[] tabs;



    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
        tabs=getResources().getStringArray(R.array.tabs);
    }

    @Override
    public Fragment getItem(int position) {

        MyFragment myFragment=MyFragment.getInstance(position);
        return myFragment;
    }

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

    @Override
    public int getCount() {
        return 5;
    }
}

public static class MyFragment extends Fragment {

    private TextView textView;
    private ListView mainListView;
    private ArrayAdapter<String> listAdapter ;

    public static MyFragment getInstance(int position){

        MyFragment myFragment=new MyFragment();
        Bundle  args=new Bundle();
        args.putInt("position", position);
        myFragment.setArguments(args);
        return myFragment;
    }

    @Override

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View layout=inflater.inflate(R.layout.fragment_my, container, false);

        mainListView=(ListView) layout.findViewById(R.id.mainListView);

        String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars",
                "Jupiter", "Saturn", "Uranus", "Neptune"};
        ArrayList<String> planetList = new ArrayList<String>();
        planetList.addAll( Arrays.asList(planets) );

        String[] stars = new String[] { "Eridanus", "Cassiopeia", "Scorpius", "Crux",
                "Cancer", "Leo", "Canis Major", "Taurus"};
        ArrayList<String> starsList = new ArrayList<String>();
        planetList.addAll( Arrays.asList(stars) );

        listAdapter = new ArrayAdapter<String>(getActivity(), R.layout.simplerow, planetList);
        mainListView.setAdapter( listAdapter );
        return layout;
    }

}

}

Answer 1

您可以使用基于pagerposition的开关案例，如

ArrayList<String> planetList = new ArrayList<String>();

switsh(pagerposition){

Case 0:
     String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars",
                "Jupiter", "Saturn", "Uranus", "Neptune"};
        planetList.addAll( Arrays.asList(planets) );
    break;

Case 1: 

       String[] stars = new String[] { "Eridanus", "Cassiopeia", "Scorpius",   "Crux", "Cancer", "Leo", "Canis Major", "Taurus"};
        planetList.addAll( Arrays.asList(stars) );
break;

and so on.....
}

在每个选项卡中显示不同的ArrayLists

1 个答案: