Question

我在全屏模式下有活动。在活动中是一个带有4个标签的ActionBar。我的问题是我想在活动的顶部“模拟”我自己的状态栏。但我无法在状态栏上方添加视图。

当我将自定义视图设置为ActionBar（并设置.setDisplayShowHomeEnabled（true））时，它基本上可以工作 - 自定义视图位于ActionBar-Tabs之上。但是在这个解决方案中，我无法控制自定义视图的高度 - 它始终静态地保持相同的高度。

您有什么想法来解决这个问题吗？

非常感谢和最诚挚的问候托比

Answer 1

如果你想要，你可以做到这一点，避免采取行动吧

不要使用操作栏，而是像操作栏一样创建线性或相对布局。

为布局指定与操作栏完全相同的固定高度。您可以从zip中的模板找到不同场景的操作栏的确切高度。 http://developer.android.com/downloads/design/Android_Design_Downloads_20130814.zip

然后使用带有片段的Tabhost来显示选项卡，因为tabhost可以放置在您可以随意使用它们的任何位置。

如果你想继续这种方式让我知道我会帮助你使用tabhost代码来显示标签。

这是带有片段

的TAbhost示例代码

1.＆gt;将此添加到您的xml

<TabHost
      android:id="@android:id/tabhost"
      android:layout_width="match_parent"
      android:layout_height="match_parent">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TabWidget
        android:id="@android:id/tabs"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:layout_weight="0"
        android:background="@null"

        />

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="0"/>

    <FrameLayout
        android:id="@+android:id/realtabcontent"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

</LinearLayout>

您还可以使用viewpager替换第二个framelayout以提供可转换标签，如果您打算这样做，则不要更改ID，只需将viewLayout标签替换为viewpager

2＆GT;将此代码放在您的活动中

    mTabHost = (TabHost) findViewById(android.R.id.tabhost);
    mTabHost.setup();


    mTabManager = new TabManager(this, mTabHost, R.id.realtabcontent);

    mTabManager.addTab(
            mTabHost.newTabSpec("fragment1").setIndicator("Fragment1"), FragmentOne.class,
            null);
    mTabManager.addTab(
            mTabHost.newTabSpec("fragment2").setIndicator("Fragment2"),
            FragmentTwo.class, null);

    if (savedInstanceState != null) {
        mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
    }

}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString("tab", mTabHost.getCurrentTabTag());
}

/**
 * This is a helper class that implements a generic mechanism for
 * associating fragments with the tabs in a tab host. It relies on a trick.
 * Normally a tab host has a simple API for supplying a View or Intent that
 * each tab will show. This is not sufficient for switching between
 * fragments. So instead we make the content part of the tab host 0dp high
 * (it is not shown) and the TabManager supplies its own dummy view to show
 * as the tab content. It listens to changes in tabs, and takes care of
 * switch to the correct fragment shown in a separate content area whenever
 * the selected tab changes.
 */
public static class TabManager implements TabHost.OnTabChangeListener {
    private final FragmentActivity mActivity;
    private final TabHost mTabHost;
    private final int mContainerId;
    private final HashMap<String, TabInfo> mTabs = new HashMap<String, TabInfo>();
    TabInfo mLastTab;

    static final class TabInfo {
        private final String tag;
        private final Class<?> clss;
        private final Bundle args;
        private Fragment fragment;

        TabInfo(String _tag, Class<?> _class, Bundle _args) {
            tag = _tag;
            clss = _class;
            args = _args;
        }
    }

    static class DummyTabFactory implements TabHost.TabContentFactory {
        private final Context mContext;

        public DummyTabFactory(Context context) {
            mContext = context;
        }

        @Override
        public View createTabContent(String tag) {
            View v = new View(mContext);
            v.setMinimumWidth(0);
            v.setMinimumHeight(0);
            return v;
        }
    }

    public TabManager(FragmentActivity activity, TabHost tabHost,
            int containerId) {
        mActivity = activity;
        mTabHost = tabHost;
        mContainerId = containerId;
        mTabHost.setOnTabChangedListener(this);
    }

    public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
        tabSpec.setContent(new DummyTabFactory(mActivity));
        String tag = tabSpec.getTag();

        TabInfo info = new TabInfo(tag, clss, args);

        // Check to see if we already have a fragment for this tab, probably
        // from a previously saved state. If so, deactivate it, because our
        // initial state is that a tab isn't shown.
        info.fragment = mActivity.getSupportFragmentManager()
                .findFragmentByTag(tag);
        if (info.fragment != null && !info.fragment.isDetached()) {
            FragmentTransaction ft = mActivity.getSupportFragmentManager()
                    .beginTransaction();
            ft.detach(info.fragment);
            ft.commit();
        }

        mTabs.put(tag, info);
        mTabHost.addTab(tabSpec);
    }

    @Override
    public void onTabChanged(String tabId) {
        TabInfo newTab = mTabs.get(tabId);
        if (mLastTab != newTab) {
            FragmentTransaction ft = mActivity.getSupportFragmentManager()
                    .beginTransaction();
            if (mLastTab != null) {
                if (mLastTab.fragment != null) {
                    ft.detach(mLastTab.fragment);
                }
            }
            if (newTab != null) {
                if (newTab.fragment == null) {
                    newTab.fragment = Fragment.instantiate(mActivity,
                            newTab.clss.getName(), newTab.args);
                    ft.add(mContainerId, newTab.fragment, newTab.tag);
                } else {
                    ft.attach(newTab.fragment);
                }
            }

            mLastTab = newTab;
            ft.commit();
            mActivity.getFragmentManager().executePendingTransactions();
        }
    }

这是一个正在运行的代码，您无需在addTab方法中更改除Fragments之外的任何内容，将片段放在那里。

对于每个片段，您都调用了addTab方法。

android添加查看ActionBar上方

1 个答案: