Question

我有一个TabActivity，其中包含3个tabs。我将currentActivity设置为1而不是默认值0。当我启动TabActivity时，我发现Activity0也运行但Tabactivity显示了我设置为currentActivity的Activity1的界面。此外，当我单击tab2（包括Activity2）并再次单击tba1或tab0时，它们不再运行。我认为TabActivity只允许运行一次。每当我点击标签时，我想在标签中重新启动每个活动。我想保留这些内容，以便在点击后退按钮时它应该是可追踪的。

public class ActivityInTab extends TabActivity implements OnTabChangeListener{
TabHost tabHost;
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activityintab);

    tabHost = getTabHost();

    TabSpec meSpec = tabHost.newTabSpec("Ben");
    meSpec.setIndicator("Ben", getResources().getDrawable(R.drawable.icon_me));
    Intent meIntent = new Intent(this, MeActivity.class);
    meSpec.setContent(meIntent);

    TabSpec searchSpec = tabHost.newTabSpec("Arama");
    searchSpec.setIndicator("Çevrende Ara", getResources().getDrawable(R.drawable.icon_search));
//        Intent searchIntent = new Intent(this, SearchActivity.class);
//        searchSpec.setContent(searchIntent);

    TabSpec resultSpec = tabHost.newTabSpec("Aradıklarım");
    resultSpec.setIndicator("Arama  Sonuçlarım", getResources().getDrawable(R.drawable.icon_result));
//        Intent resultIntent = new Intent(this, ResultActivity.class);
//        resultSpec.setContent(resultIntent);       

    tabHost.addTab(searchSpec); 
    tabHost.addTab(meSpec);
    tabHost.addTab(resultSpec);
    tabHost.setCurrentTab(1);

    tabHost.setOnTabChangedListener(this);

}

@Override
public void onTabChanged(String tabId) {
    if(tabId.equals("Ben") && tabHost.getCurrentTab()==0){
        MeActivity meact = (MeActivity) getLocalActivityManager().getActivity(tabId);

    }

    if(tabId.equals("Arama") && tabHost.getCurrentTab()==1){
        SearchActivity sact= (SearchActivity) getLocalActivityManager().getActivity(tabId); 
    }
    if(tabId.equals("Aradıklarım") && tabHost.getCurrentTab()==2){
        ResultActivity ract = (ResultActivity) getLocalActivityManager().getActivity(tabId);
    }

}

}

Answer 1

为标签意图设置标记Intent.FLAG_ACTIVITY_CLEAR_TOP。

Intent meIntent = new Intent(this, MeActivity.class);
meIntent .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

还有像这样的评论标签

Intent searchIntent = new Intent(this, SearchActivity.class);
 searchIntent .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

第二次单击时，TabActivity中的活动不会在onCreate方法上运行

1 个答案: