0

在活动 A 中是一个按钮。当您单击活动 A 中的按钮时，它会带您到 TabbedActivity，它有 5 个显示列表的选项卡/片段。每次我点击按钮时，它都会默认加载到 Tab1。如何通过 Onclick 方法将其加载到 Tab2 中？感谢任何帮助。请尝试留下详细的答案，我是新手，很容易迷路，哈哈。

Activity A 中的 onClick 方法：

  public void buttonInActivityA(View view) {

    Intent intent = new Intent(getBaseContext(), TabbedActivity.class);
    intent.putExtra("EXTRA_PAGE", 2);
    startActivity(intent);

}

}

TabbedActivity 是一个 TabbedLayout：

public class TabbedActivity extends AppCompatActivity {


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

    Bundle extras = getIntent().getExtras();
    if (extras != null) {
        String value = extras.getString("EXTRA_PAGE");
        int position= Integer.parseInt(value );
        ViewPager viewPager;
        viewPager = (ViewPager) findViewById(R.id.pager);
        viewPager.setCurrentItem(2);
    }


        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        TextView toolTitle = (TextView) findViewById(R.id.toolbar_title);
        toolTitle.setText(R.string.app_name);
        toolTitle.setTextColor(Color.parseColor("#FFFFFF"));
        setSupportActionBar(toolbar);

        // add back arrow to toolbar_layout
        if (getSupportActionBar() != null) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
        }

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        tabLayout.addTab(tabLayout.newTab().setText("PC HEALTH"));
        tabLayout.addTab(tabLayout.newTab().setText("WIFI"));
        tabLayout.addTab(tabLayout.newTab().setText("MISC"));
        tabLayout.addTab(tabLayout.newTab().setText("HOW TO"));
        tabLayout.addTab(tabLayout.newTab().setText("SHORT CUTS"));
        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        final PagerAdapter adapter = new PagerAdapter
                (getSupportFragmentManager(), tabLayout.getTabCount());




        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {

            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

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

            }

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

            }
        });
    }

这是片段的页面适配器：

class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;

public PagerAdapter(FragmentManager fm, int NumOfTabs) {
    super(fm);
    this.mNumOfTabs = NumOfTabs;
}

@Override
public Fragment getItem(int position) {

    switch (position) {
        case 0:
            FragmentOne tab1 = new FragmentOne();
            return tab1;
        case 1:
            FragmentTwo tab2 = new FragmentTwo();
            return tab2;
        case 2:
            FragmentThree tab3 = new FragmentThree();
            return tab3;
        default:
            return null;
    }
}

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

}

FragmentTwo 单击时需要加载的片段和选项卡：

public class FragmentTwo extends Fragment {


public FragmentWifi() {
    // Required empty public constructor
}


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


    return inflater.inflate(R.layout.tab_fragment_2, container, false);


}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    // THIS IS HOW TO ADD LISTVIEWS INTO A FRAGMENT, FUCK YEAH!

    ListView lv = (ListView)getActivity().findViewById(R.id.listView2);


    String[] values = new String[] { "Example", "Example",
            "Example", "Example" };
    ArrayAdapter<String> adapter = new ArrayAdapter<>(getActivity(),
            android.R.layout.simple_list_item_1, values);

    lv.setAdapter(adapter);



    // Handles items being clicked
    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            if (position == 0) {
                Intent intent = new Intent(getContext(), RandomActivity.class);
                startActivity(intent);
            }
        }
    }
    );

}

}

4

1 回答 1

0

首先，您可以更改 TabActivity 的默认选项卡。

// set the default tab to the second tab   
      viewPager.setCurrentItem(1, false);

但最好将数据传递给 tabactivity 并动态更改它。

public class TheActivity extends TabActivity {
    public static TheActivity self;
    ...
    @Override
    public void onCreate(Bundle savedInstanceState) {
        self=this;

在选项卡中运行的任何活动上，当您想要更改应用程序上显示的活动时。你可以这样做：

TabHost tabHost = TheActivity.self.getTabHost();
tabHost.setCurrentTab(0);
于 2017-01-06T20:15:20.450 回答