Android如何更改选项卡上的选项卡图标

Question

Android：

我是Android新手，我想在标签点击时更改标签图标。 我遵循了可能指导如何通过选择器xml文件更改标签图标的教程，例如

http://developer.android.com/resources/tutorials/views/hello-tabwidget.html http://www.androidhive.info/2011/08/android-tab-layout-tutorial/

但是，由于我的原因，所有这些都不起作用，因此它仅将第一个选项卡图标更改为未选择，未更改为已选择，但不适用于所有其他选项卡，这是我的代码中的问题，请帮助我。

我的代码如下

我的可绘制图标设置文件如下，名称为

可绘制文件夹下的becel_setting.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- When selected, -->
    <item android:drawable="@drawable/menu_promenera_selected"
          android:state_selected="true"
          android:state_pressed="false" />

    <!-- When not selected, -->
    <item android:drawable="@drawable/menu_promenera"
         />

    <!-- When selected, -->
    <item android:drawable="@drawable/menu_varaframsteg_selected"
          android:state_selected="true"
          android:state_pressed="false" />
    <!-- When not selected, -->
    <item android:drawable="@drawable/menu_varaframsteg"
         />

    <!-- When selected,  -->
    <item android:drawable="@drawable/menu_minapromenader_selected"
          android:state_selected="true"
          android:state_pressed="false" />
    <!-- When not selected,-->
    <item android:drawable="@drawable/menu_minapromenader"
         />

    <!-- When selected,  -->
    <item android:drawable="@drawable/menu_information_selected"
          android:state_selected="true"
          android:state_pressed="false" />
    <!-- When not selected, -->
    <item android:drawable="@drawable/menu_information"
         />

</selector>

和我的选项卡主机主机类如下

public class BECEL extends TabActivity{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        try{
            setMenuTabs();
        }catch(Exception ex){
            String message = ex.getMessage();
        }
    }

    private void setMenuTabs() {
        Resources res = getResources(); // Resource object to get Drawables
        TabHost tabHost = getTabHost();  // The activity TabHost

        TabHost.TabSpec spec;  // Resusable TabSpec for each tab
        Intent intent;  // Reusable Intent for each tab

        /*******************************************/

        intent = new Intent(this, BecelFacebookConnection.class);

        spec = tabHost.newTabSpec("").setIndicator("",
        res.getDrawable(R.drawable.becel_setting)).setContent(intent);  /**** xml file name becel_setting ******/
        tabHost.addTab(spec);        



        intent = new Intent(this, OurProgress.class);
        Drawable mySelector = getResources().getDrawable(R.drawable.menu_varaframsteg);
        spec = tabHost.newTabSpec("").setIndicator("",mySelector).setContent(intent);
        tabHost.addTab(spec);



        intent = new Intent(this, MyWalks.class);

        spec = tabHost.newTabSpec("").setIndicator("",
        res.getDrawable(R.drawable.menu_minapromenader)).setContent(intent);
        tabHost.addTab(spec);



        intent = new Intent(this, WalkInformations.class);

        spec = tabHost.newTabSpec("").setIndicator("",
        res.getDrawable(R.drawable.menu_information)).setContent(intent);
        tabHost.addTab(spec);

        tabHost.setCurrentTab(0);

    }
}

请帮助我代码中的问题

Answer 1

您需要为每个newTabSpec（“”）提供唯一的字符串值。 在以下示例中，例如tab1 ， tab2 ， tab3和tab4 ：

public class BECEL extends TabActivity{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        try{
            setMenuTabs();
        }catch(Exception ex){
            String message = ex.getMessage();
        }
    }

    private void setMenuTabs() {
        Resources res = getResources(); // Resource object to get Drawables
        TabHost tabHost = getTabHost();  // The activity TabHost

        TabHost.TabSpec spec;  // Resusable TabSpec for each tab
        Intent intent;  // Reusable Intent for each tab

        /*******************************************/

        intent = new Intent(this, BecelFacebookConnection.class);

        spec = tabHost.newTabSpec("tab1").setIndicator("tab1",
        res.getDrawable(R.drawable.becel_setting)).setContent(intent);  /**** xml file name becel_setting ******/
        tabHost.addTab(spec);        



        intent = new Intent(this, OurProgress.class);
        Drawable mySelector = getResources().getDrawable(R.drawable.menu_varaframsteg);
        spec = tabHost.newTabSpec("tab2").setIndicator("tab2",mySelector).setContent(intent);
        tabHost.addTab(spec);



        intent = new Intent(this, MyWalks.class);

        spec = tabHost.newTabSpec("tab3").setIndicator("tab3",
        res.getDrawable(R.drawable.menu_minapromenader)).setContent(intent);
        tabHost.addTab(spec);



        intent = new Intent(this, WalkInformations.class);

        spec = tabHost.newTabSpec("tab4").setIndicator("tab4",
        res.getDrawable(R.drawable.menu_information)).setContent(intent);
        tabHost.addTab(spec);

        tabHost.setCurrentTab(0);

    }
}