android - 将 ViewPager 添加到现有 TabHost

Question

嗨，我想将视图寻呼机添加到现有代码中。什么是最好的添加方式。这是我的 RssTabActivitty.java 和 RssChannelActivity.java。

RssTabActivity 是我初始化选项卡的主要活动。RssChannelActivity 正在加载 rss 提要。

这是完整的源代码 https://github.com/itcuties/Android-Multicategory-RSS-Reader

public class RssTabsActivity extends TabActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // First, set the content view
    setContentView(R.layout.activity_rss_tabs);

    // Then get the TabHost
    TabHost tabHost = getTabHost();

    /* *****************
     * Art tab
     */
    Intent artIntent = new Intent().setClass(this, RssChannelActivity.class);
    // Set Art category RSS URL
    artIntent.putExtra("rss-url", "http://feeds.reuters.com/news/artsculture?format=xml");

    // The name of the art tab taken from the String resources
    String artTabName = getResources().getString(R.string.tab_art);
    TabSpec artTabSpec = tabHost.newTabSpec(artTabName)
                                .setIndicator(artTabName, getResources().getDrawable(R.drawable.rss_tab_art))
                                .setContent(artIntent);
    // Add art tab to the TabHost
    tabHost.addTab(artTabSpec);

    /* *****************
     * Tech tab
     */
    Intent techIntent = new Intent().setClass(this, RssChannelActivity.class);
    // Set Tech category RSS URL
    techIntent.putExtra("rss-url", "http://feeds.reuters.com/reuters/technologyNews?format=xml");

    // Tech tab name taken from the string resources
    String techTabName = getResources().getString(R.string.tab_tech);
    TabSpec techTabSpec = tabHost.newTabSpec(techTabName)
                                 .setIndicator(techTabName, getResources().getDrawable(R.drawable.rss_tab_tech))
                                 .setContent(techIntent);
    // Add tech tab to the TabHost
    tabHost.addTab(techTabSpec);


    /* *****************
     * Sports tab
     */
    Intent sportsIntent = new Intent().setClass(this, RssChannelActivity.class);
    // Set Sports category RSS URL
    sportsIntent.putExtra("rss-url", "http://feeds.reuters.com/reuters/sportsNews?format=xml");

    // Sports tab name - string resources
    String sportsTabName = getResources().getString(R.string.tab_sports);
    TabSpec sportsTabSpec = tabHost.newTabSpec(sportsTabName)
                                   .setIndicator(sportsTabName, getResources().getDrawable(R.drawable.rss_tab_sports))
                                   .setContent(sportsIntent);
    // Add sports tab to the TabHost
    tabHost.addTab(sportsTabSpec);


    // Set current tab to Technology
    tabHost.setCurrentTab(1);
}


}



public class RssChannelActivity extends Activity {


// A reference to this activity
private RssChannelActivity local;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_rss_channel);

    // Get the RSS URL that was set in the RssTabActivity
    String rssUrl = (String)getIntent().getExtras().get("rss-url");

    // Set reference to this activity
    local = this;

    GetRSSDataTask task = new GetRSSDataTask();

    // Start process RSS task
    task.execute(rssUrl);

}

/**
 * This class downloads and parses RSS Channel feed.
 * 
 * @author itcuties
 *
 */
private class GetRSSDataTask extends AsyncTask<String, Void, List<RssItem> > {
    @Override
    protected List<RssItem> doInBackground(String... urls) {
        try {
            // Create RSS reader
            RssReader rssReader = new RssReader(urls[0]);

            // Parse RSS, get items
            return rssReader.getItems();

        } catch (Exception e) {
            Log.e("RssChannelActivity", e.getMessage());
        }

        return null;
    }

    @Override
    protected void onPostExecute(List<RssItem> result) {

        // Get a ListView from the RSS Channel view
        ListView itcItems = (ListView) findViewById(R.id.rssChannelListView);

        // Create a list adapter
        ArrayAdapter<RssItem> adapter = new ArrayAdapter<RssItem>(local,android.R.layout.simple_list_item_1, result);
        // Set list adapter for the ListView
        itcItems.setAdapter(adapter);

        // Set list view item click listener
        itcItems.setOnItemClickListener(new ListListener(result, local));
    }
}

score 0 · Accepted Answer

要将视图寻呼机添加到您的活动：

将 ViewPager 资源添加到您的活动资源中：

<android.support.v4.view.PagerTitleStrip
    android:id="@+id/pager_title_strip"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="top"
    android:background="#33b5e5"
    android:paddingBottom="4dp"
    android:paddingTop="4dp"
    android:textColor="#fff" />

创建寻呼机的片段资源：

<TextView
    android:id="@+id/section_label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

创建片段的片段类：

public static class DummySectionFragment extends Fragment { /** * 表示此片段的节号的片段参数。*/ public static final String ARG_SECTION_NUMBER = "section_number";

    public DummySectionFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main_dummy,
                container, false);
        TextView dummyTextView = (TextView) rootView
                .findViewById(R.id.section_label);
        dummyTextView.setText(Integer.toString(getArguments().getInt(
                ARG_SECTION_NUMBER)));
        return rootView;
    }
}

创建寻呼机的适配器类：

公共类 SectionsPagerAdapter 扩展 FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a DummySectionFragment (defined as a static inner class
        // below) with the page number as its lone argument.
        Fragment fragment = new DummySectionFragment();
        Bundle args = new Bundle();
        args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 3;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        Locale l = Locale.getDefault();
        switch (position) {
        case 0:
            return getString(R.string.title_section1).toUpperCase(l);
        case 1:
            return getString(R.string.title_section2).toUpperCase(l);
        case 2:
            return getString(R.string.title_section3).toUpperCase(l);
        }
        return null;
    }
}

在您的活动中使用寻呼机（您的活动必须扩展 FragmentActivity）：

SectionsPagerAdapter mSectionsPagerAdapter; ViewPager mViewPager; mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); // 使用部分适配器设置 ViewPager。mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter);

android - 将 ViewPager 添加到现有 TabHost

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