Question

你好，我是Android中的菜鸟。

我正在使用appcompat支持库在ActionBarActivity中添加标签。我已经编写了要添加的代码但是顶部显示的标签在屏幕截图中看到了它。我想设置出现在底部的Tabs。

知道为什么会这样吗？

private ActionBar mActionBar;

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

    // find the action bar
    mActionBar = getSupportActionBar();

    // First Tab of the Activity
    ActionBar.Tab mTab = mActionBar.newTab().setText("First Tab").setTabListener(this);
    mActionBar.addTab(mTab);
    mActionBar.selectTab(mTab);

    // Second Tab of the Activity
    mTab = mActionBar.newTab().setText("Second Tab").setTabListener(this);
    mActionBar.addTab(mTab);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
    // TODO Auto-generated method stub

}

@Override
public void onTabSelected(Tab tab, FragmentTransaction fragmentTrasaction) {
    if(tab.getPosition() == 0) {
        fragmentTrasaction.replace(R.id.container, new FirstFragment());
    } else {
        fragmentTrasaction.replace(R.id.container, new SecondFragment());
    }
}

@Override
public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
    // TODO Auto-generated method stub

}

截图

enter image description here

Answer 1

您可以在屏幕的任何位置创建自己的TabView栏，例如在底部完美地为swiching片段工作 tags_icon.xml中的简单自定义视图

底部TabView

主要活动类

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;

public class TagsActivity extends Activity {
    public static final String M_CURRENT_TAB = "M_CURRENT_TAB";
    private TabHost mTabHost;
    private String mCurrentTab;

    public static final String TAB_TAGS = "TAB_TAGS";
    public static final String TAB_MAP = "TAB_MAP";
    public static final String TAB_SETTINGS = "TAB_SETTINGS";

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
        getActionBar().hide();
        setContentView(R.layout.tags_activity);

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

        mTabHost.setup();

        if (savedInstanceState != null) {
            mCurrentTab = savedInstanceState.getString(M_CURRENT_TAB);
            initializeTabs();
            mTabHost.setCurrentTabByTag(mCurrentTab);
            /*
            when resume state it's important to set listener after initializeTabs
            */
            mTabHost.setOnTabChangedListener(listener);
        } else {
            mTabHost.setOnTabChangedListener(listener);
            initializeTabs();
        }
    }

    private View createTabView(final int id, final String text) {
        View view = LayoutInflater.from(this).inflate(R.layout.tabs_icon, null);
        ImageView imageView = (ImageView) view.findViewById(R.id.tab_icon);
        imageView.setImageDrawable(getResources().getDrawable(id));
        TextView textView = (TextView) view.findViewById(R.id.tab_text);
        textView.setText(text);
        return view;
    }

    /*
    create 3 tabs with name and image
    and add it to TabHost
     */
    public void initializeTabs() {

        TabHost.TabSpec spec;

        spec = mTabHost.newTabSpec(TAB_TAGS);
        spec.setContent(new TabHost.TabContentFactory() {
            public View createTabContent(String tag) {
                return findViewById(R.id.realtabcontent);
            }
        });
        spec.setIndicator(createTabView(R.drawable.tab_tag_drawable, getString(R.string.tab_tags)));
        mTabHost.addTab(spec);

        spec = mTabHost.newTabSpec(TAB_MAP);
        spec.setContent(new TabHost.TabContentFactory() {
            public View createTabContent(String tag) {
                return findViewById(R.id.realtabcontent);
            }
        });
        spec.setIndicator(createTabView(R.drawable.tab_map_drawable, getString(R.string.tab_map)));
        mTabHost.addTab(spec);


        spec = mTabHost.newTabSpec(TAB_SETTINGS);
        spec.setContent(new TabHost.TabContentFactory() {
            public View createTabContent(String tag) {
                return findViewById(R.id.realtabcontent);
            }
        });
        spec.setIndicator(createTabView(R.drawable.tab_settings_drawable, getString(R.string.tab_settings)));
        mTabHost.addTab(spec);

    }

    /*
    first time listener will be trigered immediatelly after first: mTabHost.addTab(spec);
    for set correct Tab in setmTabHost.setCurrentTabByTag ignore first call of listener
    */
    TabHost.OnTabChangeListener listener = new TabHost.OnTabChangeListener() {
        public void onTabChanged(String tabId) {

            mCurrentTab = tabId;

            if (tabId.equals(TAB_TAGS)) {
                pushFragments(SearchFragment.getInstance(), false,
                        false, null);
            } else if (tabId.equals(TAB_MAP)) {
                pushFragments(MapContainerFragment.getInstance(), false,
                        false, null);
            } else if (tabId.equals(TAB_SETTINGS)) {
                pushFragments(SettingsFragment.getInstance(), false,
                        false, null);
            }

        }
    };

/*
Example of starting nested fragment from another fragment:

Fragment newFragment = ManagerTagFragment.newInstance(tag.getMac());
                TagsActivity tAct = (TagsActivity)getActivity();
                tAct.pushFragments(newFragment, true, true, null);
 */
    public void pushFragments(Fragment fragment,
                              boolean shouldAnimate, boolean shouldAdd, String tag) {
        FragmentManager manager = getFragmentManager();
        FragmentTransaction ft = manager.beginTransaction();
        if (shouldAnimate) {
            ft.setCustomAnimations(R.animator.fragment_slide_left_enter,
                    R.animator.fragment_slide_left_exit,
                    R.animator.fragment_slide_right_enter,
                    R.animator.fragment_slide_right_exit);
        }
        ft.replace(R.id.realtabcontent, fragment, tag);

        if (shouldAdd) {
            /*
            here you can create named backstack for realize another logic.
            ft.addToBackStack("name of your backstack");
             */
            ft.addToBackStack(null);
        } else {
            /*
            and remove named backstack:
            manager.popBackStack("name of your backstack", FragmentManager.POP_BACK_STACK_INCLUSIVE);
            or remove whole:
            manager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
             */
            manager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
        }
        ft.commit();
    }

    /*
    If you want to start this activity from another
     */
    public static void startUrself(Activity context) {
        Intent newActivity = new Intent(context, TagsActivity.class);
        newActivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(newActivity);
        context.finish();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putString(M_CURRENT_TAB, mCurrentTab);
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onBackPressed(){
        super.onBackPressed();
    }
}

<强> tags_activity.xml

<?xml version="1.0" encoding="utf-8"?>
    <TabHost
        xmlns:android="http://schemas.android.com/apk/res/android"
        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">

            <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:background="@drawable/bg_main_app_gradient"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"/>
            <TabWidget
                android:id="@android:id/tabs"
                android:background="#EAE7E1"
                android:orientation="horizontal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0"/>
        </LinearLayout>
    </TabHost>

<强> tags_icon.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/tabsLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/bg_tab_gradient"
    android:gravity="center"
    android:orientation="vertical"
    tools:ignore="contentDescription" >

    <ImageView
        android:id="@+id/tab_icon"
        android:layout_marginTop="4dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView 
        android:id="@+id/tab_text"
        android:layout_marginBottom="3dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/tab_text_color"/>

</LinearLayout>

enter image description here

在ActionBarActivity的底部设置ActionBar选项卡

1 个答案: