Question

我搜索了高低，找到了答案。那里有一些很棒的资源，但没有一个我发现我现在可以加入到我的代码中。但是，我是一个初学者，在java / android编程中也是noob，所以这可能是问题哈哈。我有以下工作代码。每个选项卡都有一个与之关联的类。四个选项卡，四个类加上xml以及每个选项卡/类。我在这段代码中实现了actionbar，fragment。我想实现水平滑动动作。我还希望能够单击选项卡以及在它们之间滑动。有人可以帮助我在现有代码中完成这项工作吗？找一个很好的教程来帮忙吗？让我知道我的当前代码是否可以纠正或改进以实现这一目标？如果您需要更多信息，请告诉我。这是代码提前致谢！

MainActivity.java

public class MainActivity extends Activity {
private static final String TAB_KEY_INDEX = "tab_key";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ActionBar actionbar = getActionBar();
    actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    ActionBar.Tab mActivityATab = actionbar.newTab().setText(
            getString(R.string.ui_tabname_a));
    ActionBar.Tab mActivityBTab = actionbar.newTab().setText(
            getString(R.string.ui_tabname_b));
    ActionBar.Tab mActivityCTab = actionbar.newTab().setText(
            getString(R.string.ui_tabname_c));
    ActionBar.Tab mActivityDTab = actionbar.newTab().setText(
            getString(R.string.ui_tabname_d));

    Fragment mActivityA = new ActivityA();
    Fragment mActivityB = new ActivityB();
    Fragment mActivityC = new ActivityC();
    Fragment mActivityD = new ActivityD();

    mActivityATab.setTabListener(new MyTabsListener(mActivityA,
            getApplicationContext()));
    mActivityBTab.setTabListener(new MyTabsListener(mActivityB,
            getApplicationContext()));
    mActivityCTab.setTabListener(new MyTabsListener(mActivityC,
            getApplicationContext()));
    mActivityDTab.setTabListener(new MyTabsListener(mActivityD,
            getApplicationContext()));

    actionbar.addTab(mActivityATab);
    actionbar.addTab(mActivityBTab);
    actionbar.addTab(mActivityCTab);
    actionbar.addTab(mActivityDTab);

    if (savedInstanceState != null) {

        actionbar.setSelectedNavigationItem(savedInstanceState.getInt(
                TAB_KEY_INDEX, 0));
    }

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {

      case R.id.menuitem_quit:

            finish();
            return true;

    }

    return false;
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);

    outState.putInt(TAB_KEY_INDEX, getActionBar()
            .getSelectedNavigationIndex());

}

class MyTabsListener implements ActionBar.TabListener {
    public Fragment fragment;
    public Context context;

    public MyTabsListener(Fragment fragment, Context context) {
        this.fragment = fragment;
        this.context = context;

    }

    @Override
    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
        ft.replace(R.id.fragment_container, fragment);
    }
    @Override
    public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {

    }
    @Override
    public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {

    }

}

}

AcivityA（其余类别相同）

public class ActivityA extends Fragment{

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



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


}}

在当前操作栏选项卡，片段代码中实现滑动操作

0 个答案: