单标签 Android 中的多个活动

Question

在我的应用程序中，我试图使用意图从选项卡中的按钮打开一个活动。但是，新活动不是在同一个选项卡中打开，而是覆盖整个屏幕，并且这些选项卡不可见。如何在同一个选项卡中打开多个活动。

以下代码属于我的主类：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    TabHost tabHost = getTabHost();
    tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("OPT").setContent(new Intent(this, TabGroup1Activity.class)));
    tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("EDIT").setContent(new Intent(this, TabGroup2Activity.class)));
    tabHost.setCurrentTab(1);
}

以下是TabGroupActivity的代码：

public class TabGroupActivity extends ActivityGroup{

ArrayList<String> list;
Window window;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    if(list.equals(null))
    {
        list = new ArrayList<String>();
    }
}

@Override
public void finishFromChild(Activity child)
{
    LocalActivityManager manager = getLocalActivityManager();
    int index = list.size() -1;
    if(index < 1)
    {
        finish();
        return;
    }
    manager.destroyActivity(list.get(index), true);
    list.remove(index);
    index--;
    String lastId = list.get(index);
    Intent in = manager.getActivity(lastId).getIntent();
    window = manager.startActivity(lastId, in);
    setContentView(window.getDecorView());
}

public void startChildActivity(String Id, Intent intent)
{
    window = getLocalActivityManager().startActivity(Id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
    if(window != null)
    {
        list.add(Id);
        setContentView(window.getDecorView());
    }
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
    if(keyCode == KeyEvent.KEYCODE_BACK)
        return true;
    return super.onKeyDown(keyCode, event);
}

@Override
public boolean onKeyUp(int keyCode, KeyEvent event)
{
    if(keyCode == KeyEvent.KEYCODE_BACK)
    {
        onBackPressed();
        return true;
    }
    return super.onKeyUp(keyCode, event);
}

@Override
public void onBackPressed()
{
    int length = list.size();
    if(length > 1)
    {
        Activity current = getLocalActivityManager().getActivity(list.get(length - 1));
        current.finish();
    }
}
}

TabGroup1Activity 的代码 TabGroup2Activity 也有相同的代码：

public class TabGroup1Activity extends TabGroupActivity{
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    startChildActivity("TestClass", new Intent(this,TestClass.class));
}
}

TestClass 活动的代码：

public class TestClass extends Activity {

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

请帮我解决我的问题..

提前谢谢...

Answer 1

您可以使用fragments..check http://mobile.tutsplus.com/tutorials/android/android-compatibility-working-with-fragments/ 来做到这一点