使用要显示最后一个活动的活动组在选项卡之间切换 - Tab ActivityGroup

我已经为我的 Android 应用程序编写了选项卡。

我的问题是使用它想要显示最后一个活动的活动组在选项卡之间切换。我想在导航选项卡时显示上次打开/访问的屏幕。我的方法是转到第一个屏幕：

我需要在浏览选项卡时显示上次打开的屏幕

选项卡 1 -> 销售。这里面包含10个屏幕（活动） 选项卡 2 -> 管理。这包含 5 个屏幕（活动） 选项卡 3 -> 设置。里面包含 8 个屏幕。 （活动）

我单击选项卡 1，它加载选项卡 1 的屏幕，其中包含销售路线列表。然后我单击一个销售路线，它会转到第一个选项卡中的零售商列表。然后我单击选项卡 3“设置”完成一些工作并返回对于销售，此时它应该在“销售”选项卡中显示最后打开的屏幕。

当我单击选项卡时，它应该显示上次打开的活动怎么做？

我确实喜欢这样。请指出我想根据我的要求更改代码的位置。

MainActivity.登录后会调用

  public class MainActivity extends TabActivity {
int selectedTab;
TabHost tabHost ;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tabview);

    TabHost t = getTabHost();
    tabHost = (TabHost)findViewById(android.R.id.tabhost);

    TabSpec firstTabSpec = tabHost.newTabSpec("tid1");
    TabSpec secondTabSpec = tabHost.newTabSpec("tid1");
    TabSpec thirdTabSpec = tabHost.newTabSpec("tid1");
    /** TabSpec setIndicator() is used to set name for the tab. */
    /** TabSpec setContent() is used to set content for a particular tab. */
    firstTabSpec.setIndicator("Sales").setContent(new Intent(this,SalesActivityGroup.class));
    secondTabSpec.setIndicator("Admin").setContent(new Intent(this,SettingActivityGroup.class));
    thirdTabSpec.setIndicator("Setting").setContent(new Intent(this,SettingActivityGroup.class));


    tabHost.addTab(firstTabSpec);
    tabHost.addTab(secondTabSpec);
    tabHost.addTab(thirdTabSpec);
    tabHost.setCurrentTab(0);
    tabHost.setMinimumHeight(25);
}

public void onTabChanged(String arg0) {
        selectedTab = tabHost.getCurrentTab();

}

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

}

第一个 Tab1（销售）的 SalesGroupActivity

 public class SalesActivityGroup extends ActivityGroup {

public static SalesActivityGroup group;
private ArrayList<View> history;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.history = new ArrayList<View>();
    group = this;

    View view = getLocalActivityManager().startActivity("Sales",
            new Intent(this, SalesRouteActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
            .getDecorView();

    replaceView(view);

}

public void replaceView(View v) {
    history.add(v);
    setContentView(v);

}

public void back() {
    if (history.size() > 0) {
        history.remove(history.size() - 1);
        if (history.size() > 0) {
            setContentView(history.get(history.size() - 1));
        } else {
            finish();
        }
    } else {
        finish();
    }
}

@Override
public void onBackPressed() {
    SalesActivityGroup.group.back();
    return;
}

Edited这是 FirstTab 的第一个活动 - SalesRouteActivity

    public class SalesRouteActivity extends ListActivity{
     TableLayout tl;
     static int positions = 0;
     static String keyword ="";
     int uploadSize = 0;
     private NotificationManager mNotificationManager;
     private int SIMPLE_NOTFICATION_ID;
     String strBusinessUnit = "";   
     String strExecutive = "";
     String strTerritoryCode = "";
     SimpleAdapter sd;
     View row = null;
     View selectRow = null;

     @Override
     public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);
         setContentView(R.layout.sales_routes);

         SharedPreferences myPrefs = this.getSharedPreferences("myLogedPrefs",MODE_WORLD_READABLE);
         strBusinessUnit = myPrefs.getString("BusinessUnit", "");
         strExecutive = myPrefs.getString("Executive", "");
         strTerritoryCode = myPrefs.getString("TerritoryCode", "");

         ArrayList<SalesRoutes> routeList = getSalesRoute();

         ArrayList<HashMap<String, String>> routhPath = new ArrayList<HashMap<String, String>>();
         for (int i = 0; i < routeList.size(); i++) {
            if(Integer.parseInt(routeList.get(i).getOutlets()) >0){
                HashMap<String, String> map = new HashMap<String, String>();
                map.put("routeCode",((SalesRoutes) routeList.get(i)).getRouteCode());
                map.put("routeName",((SalesRoutes) routeList.get(i)).getDescription());
                map.put("outlets", ((SalesRoutes) routeList.get(i)).getOutlets());
                routhPath.add(map);
             }
         }

         ListView list = getListView();
         sd = new SimpleAdapter(this, routhPath, R.layout.route_path,new String[] {"routeCode","routeName","outlets" },new int[] { R.id.routeCode,R.id.routeName,R.id.outlets});
         row = getLayoutInflater().inflate(R.layout.route_path_row, null, false);
         getListView().addHeaderView(row);
         list.setAdapter(sd);
         list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        list.setSelected(true);
        list.setTextFilterEnabled(true);
        list.setItemsCanFocus(true);
        list.setItemChecked(positions, true);
        list.setSelectionAfterHeaderView();

        if (routeList.size() > 0) {
            keyword = routeList.get(0).getRouteCode();
        }

        uploadSize = new UploadActivity().getUploadTable();

        if (uploadSize > 0) {
            mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            final Notification notifyDetails = new Notification(R.drawable.icon, "New Alert, Click Me!",System.currentTimeMillis());
            Context context = getApplicationContext();
            CharSequence contentTitle = "Upload Available...";
            CharSequence contentText = "Browse Android Official Site by clicking me";
            Intent notifyIntent = new Intent(android.content.Intent.ACTION_VIEW,Uri.parse("http://www.android.com"));
            PendingIntent intent = PendingIntent.getActivity(SalesRouteActivity.this, 0, notifyIntent,android.content.Intent.FLAG_ACTIVITY_NEW_TASK);
            notifyDetails.setLatestEventInfo(context, contentTitle,contentText, intent);
            mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);
        }
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        HashMap<String, String> hashMap = (HashMap<String, String>) l.getItemAtPosition(position);
        keyword = hashMap.get("routeCode");

        positions = position;
        if(position == 0 ){


        }else if(position != 1){
            Intent showContent = new Intent(v.getContext(),SalesRouteDevitionActivity.class);
            Bundle bundle = new Bundle();
            bundle.putString("RouteCode", keyword);
            showContent.putExtras(bundle);
            getParent().startActivityForResult(showContent, 5);
        }else{
            Intent intent = new Intent(SalesRouteActivity.this, ListRetailerActivity.class);
            Bundle bundle = new Bundle();
            bundle.putString("RouteName", keyword);
            intent.putExtras(bundle);
            View view = SalesActivityGroup.group.getLocalActivityManager().startActivity("", intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView();  
            SalesActivityGroup.group.replaceView(view);

        }
    }

    @Override  
    public void onBackPressed() {  
        SalesActivityGroup.group.back();  
    } 

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public ArrayList<SalesRoutes> getSalesRoute(){
         DBAdapter dbAdapter = DBAdapter.getDBAdapterInstance(this);
          try {
              dbAdapter.createDataBase();
         } catch (IOException e) {
              Log.i("*** select ",e.getMessage());
         }
         dbAdapter.openDataBase();       
         String sql = "SELECT RouteCode, Description, OutletsAttached  " +
                       "FROM WMRoute  " +
                       "WHERE ActiveStatus = '1' AND  RouteDefaultExecutive = ? AND  BusinessUnit = ? AND TerritoryCode = ?  " +
                       "ORDER BY RouteCode  ";

         String[]d = new String[]{strExecutive,strBusinessUnit,strTerritoryCode};
         ArrayList stringList = dbAdapter.selectRecordsFromDBList(sql, d);
         dbAdapter.close();
         ArrayList<SalesRoutes> salesRoutesList = new ArrayList<SalesRoutes>();
         for (int i = 0; i < stringList.size(); i++) {
            ArrayList<Object> arrayList = (ArrayList<Object>) stringList.get(i);
            ArrayList<Object> list = arrayList;
            SalesRoutes salesRoutes = new SalesRoutes();
            try {
                salesRoutes.setRouteCode((String) list.get(0));
                salesRoutes.setDescription((String) list.get(1));
                salesRoutes.setOutlets((String)list.get(2));

            } catch (Exception e) {
                Log.i("***" + SalesRouteActivity.class.toString(), e.getMessage());
            }
            salesRoutesList.add(salesRoutes);
        }
        return salesRoutesList;
    }
}

当您在选项卡之间切换时，可能会一次又一次地创建我的活动组 因此，组只想创建一次，并在我在选项卡之间切换时恢复

每个屏幕的详细信息/内容都从数据库获取。

我面临这个问题超过两天了......请帮助我。 请帮助我解决这个问题......

提前致谢.....

我认为你必须覆盖onBackPressed()您正在打开的内部活动activity-group

在下面写一段代码每项活动您在活动组中打开的

@Override  
public void onBackPressed() {  
       SalesActivityGroup.group.back();  
} 

并且还替换了onBackPressed()与以下代码TABHOST

@Override
public void onBackPressed() {
    super.onBackPressed();
}

祝你好运