Question

我在我的应用中使用过TabHost。它没有在每个选项卡上单击显示xml文件。仅显示白色屏幕。类和布局在下面发布。请帮忙

public class HelpScreen extends TabActivity {

TabHost host;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.inst_manual);

    host = getTabHost();

    TabSpec btnHelp = host.newTabSpec("Buttons Help");
    btnHelp.setIndicator("Buttons Help",getResources().getDrawable(R.drawable.brushes_help));
    Intent buttonsHelp = new Intent().setClass(this, ButtonsHelp.class);
    btnHelp.setContent(buttonsHelp);

    TabSpec drawHelp = host.newTabSpec("Drawing Help");
    drawHelp.setIndicator("Drawing Help",getResources().getDrawable(R.drawable.brushes_help));
    Intent drawingHelp = new Intent().setClass(this, DrawingHelp.class);
    drawHelp.setContent(drawingHelp);

    host.addTab(btnHelp);
    host.addTab(drawHelp);
}
}

按钮帮助类是，

public class ButtonsHelp extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.buttons_help); //THIS XML IS NOT SHOWN ON TAB CLICK
}
}

帮助屏幕布局

<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:id="@+id/tabLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    </TabWidget>

    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
    </FrameLayout>
</LinearLayout>

</TabHost>

TabHost没有显示布局

0 个答案: