3

我创建了一个带有 TabHost 和 TabActivity 的 android 应用程序。在 Android 2.3.4 上，图标出现在我的选项卡上，但在 Android 4.2.2 上却没有。这是我的 TabHost 活动代码。所有的图标都在 res.drawable 文件夹中。

@SuppressWarnings("deprecation")
public class MainActivity extends TabActivity {
private static MainActivity instance = null;
/**
 * This is the IO Singleton Instance
 * 
 */
public static MainActivity sharedInstance(){
    if (instance == null){
        instance = new MainActivity();
    }
    return instance;
}

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


    tabHost = getTabHost();

    //Tab for Main Menu
    TabSpec menuSpec = tabHost.newTabSpec("Home");
    menuSpec.setIndicator("Home", getResources().getDrawable(R.drawable.main_menu));
    Intent menuIntent = new Intent(this, MenuActivity.class);
    menuSpec.setContent(menuIntent);

    //Tab for Evacuation Routes
    TabSpec evacSpec = tabHost.newTabSpec("Evacuation Routes");
    evacSpec.setIndicator("Evacuation Routes", getResources().getDrawable(R.drawable.icon29));
    Intent evacIntent = new Intent(this, EvacRouteTableActivity.class);
    evacSpec.setContent(evacIntent);

    //Tab for Shelters
    TabSpec shelterSpec = tabHost.newTabSpec("Shelter Routes");
    shelterSpec.setIndicator("Shelter Routes", getResources().getDrawable(R.drawable.shelter));
    Intent shelterIntent = new Intent(this, ShelterActivity.class);
    shelterSpec.setContent(shelterIntent);

    //Tab for Fueling Stations
    TabSpec fuelSpec = tabHost.newTabSpec("Refueling Routes");
    fuelSpec.setIndicator("Refueling Routes", getResources().getDrawable(R.drawable.fillingstation));
    Intent fuelIntent = new Intent(this, FuelStopActivity.class);
    fuelSpec.setContent(fuelIntent);

    //Tab for the Map
    TabSpec mapSpec = tabHost.newTabSpec("Map");
    mapSpec.setIndicator("Map", getResources().getDrawable(R.drawable.fillingstation));
    Intent mapIntent = new Intent(this, MapViewActivity.class);
    mapSpec.setContent(mapIntent);        

    tabHost.addTab(menuSpec);
    tabHost.addTab(evacSpec);
    tabHost.addTab(shelterSpec);
    tabHost.addTab(fuelSpec);
    tabHost.addTab(mapSpec);


}


@Override
public void onConfigurationChanged(Configuration newConfig)
{
    super.onConfigurationChanged(newConfig);
}

public void addTabs(TabHost tHost){



    //Tab for the Map
    TabSpec mapSpec = tHost.newTabSpec("Map");
    mapSpec.setIndicator("Map", getResources().getDrawable(R.drawable.fillingstation));
    Intent mapIntent = new Intent(this, MapViewActivity.class);
    mapSpec.setContent(mapIntent);        



    tHost.addTab(mapSpec);
}

@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;
}

}

我的 layout.xml 文件

<?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="fill_parent"
    android:layout_height="fill_parent">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
         android:padding="5dp">
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:padding="5dp"/>
    </LinearLayout>
</TabHost>
4

0 回答 0