Lite gammal tråd men då det inte har kommit något svar så...
Ibland är ovanstående det enda vettiga sättet att lösa problemet på.
En bra lösning jag hittade någonstans (antagligen på stackoverflow):
TabGroupActivity.java
Kod:
package com.pajn.raxa.mobile.includes;
import java.util.ArrayList;
import com.pajn.raxa.mobile.R;
import com.pajn.raxa.mobile.TabLibrary;
import android.app.Activity;
import android.app.ActivityGroup;
import android.app.LocalActivityManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Window;
import android.widget.TabHost;
import android.widget.TextView;
/**
* The purpose of this Activity is to manage the activities in a tab.
* Note: Child Activities can handle Key Presses before they are seen here.
* @author Eric Harlow
*/
public class TabGroupActivity extends ActivityGroup {
private ArrayList<String> mIdList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (mIdList == null) mIdList = new ArrayList<String>();
}
/**
* This is called when a child activity of this one calls its finish method.
* This implementation calls {@link LocalActivityManager#destroyActivity} on the child activity
* and starts the previous activity.
* If the last child activity just called finish(),this activity (the parent),
* calls finish to finish the entire group.
*/
@Override
public void finishFromChild(Activity child) {
LocalActivityManager manager = getLocalActivityManager();
int index = mIdList.size()-1;
if (index < 1) {
finish();
return;
}
if (index == 1) {
TabLibrary.changeTitle(getString(R.string.rooms));
}
manager.destroyActivity(mIdList.get(index), true);
mIdList.remove(index);
index--;
String lastId = mIdList.get(index);
Intent lastIntent = manager.getActivity(lastId).getIntent();
Window newWindow = manager.startActivity(lastId, lastIntent);
setContentView(newWindow.getDecorView());
}
/**
* Starts an Activity as a child Activity to this.
* @param Id Unique identifier of the activity to be started.
* @param intent The Intent describing the activity to be started.
* @throws android.content.ActivityNotFoundException.
*/
public void startChildActivity(String Id, Intent intent) {
Window window = getLocalActivityManager().startActivity(Id,intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if (window != null) {
mIdList.add(Id);
setContentView(window.getDecorView());
}
}
/**
* The primary purpose is to prevent systems before android.os.Build.VERSION_CODES.ECLAIR
* from calling their default KeyEvent.KEYCODE_BACK during onKeyDown.
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
//preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* Overrides the default implementation for KeyEvent.KEYCODE_BACK
* so that all systems call onBackPressed().
*/
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
onBackPressed();
return true;
}
return super.onKeyUp(keyCode, event);
}
/**
* If a Child Activity handles KeyEvent.KEYCODE_BACK.
* Simply override and add this method.
*/
public void onBackPressed () {
int length = mIdList.size();
if ( length > 1) {
Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1));
current.finish();
}
}
}
DinTabGroup.java
Kod:
package com.pajn.raxa.mobile.includes;
import com.pajn.raxa.mobile.Rooms;
import android.content.Intent;
import android.os.Bundle;
public class RoomsTabGroup extends TabGroupActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
startChildActivity("rooms", new Intent(this, Rooms.class));
}
}
Låt TabHosten peka på DinTabGroup.java.
Klassen som intenten i DinTabGroup.java startar är sedan den tabben du ville visa från början. När du ska vidare till nästa activity i tabben använder du
Kod:
TabGroupActivity parentActivity = (TabGroupActivity) getParent();
parentActivity.startChildActivity("devicesRoom", intent);
Jag gillar lösningen då den låter koden i tabbarna som använder den vara nästan orörd.