Android:tabhost比tabs更具意图
以下是我的问题: 我有一个正常的tabactivity,我的三个选项卡定义如下:Android:tabhost比tabs更具意图,android,android-intent,tabs,Android,Android Intent,Tabs,以下是我的问题: 我有一个正常的tabactivity,我的三个选项卡定义如下: TabSpec listatabs= tabHost.newTabSpec("App"); listatabs.setIndicator("Lista", getResources().getDrawable(R.drawable.mia_lista)); Intent listaIntent = new Intent(this, MIALISTA.class); listaInte
TabSpec listatabs= tabHost.newTabSpec("App");
listatabs.setIndicator("Lista", getResources().getDrawable(R.drawable.mia_lista));
Intent listaIntent = new Intent(this, MIALISTA.class);
listaIntent .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
listatabs.setContent(listaIntent );
// Aggiungo i tabs
tabHost.addTab(listatabs);
问题是:如果用户进入这个选项卡(有一个项目列表),并单击一个项目,我必须调用一个新的意图来显示内容(当然还有一个新的.class)。。。但我必须继续留在感兴趣的账单上。
如何实现此想法?使用自定义活动组: 创建一个类选项卡GroupActivity:
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;
}
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.
*/
@Override
public void onBackPressed() {
int length = mIdList.size();
if ( length > 1) {
Activity current = getLocalActivityManager().getActivity(mIdList.get(length-1));
current.finish();
}
}
在活动A中,使用此按钮转到活动B:
Intent i = new Intent(getParent(),ActivityB.class);
TabGroupActivity parentActivity = (TabGroupActivity)getParent();
parentActivity.startChildActivity("ActivityB", i);
并让选项卡将您带到“HomeTabGroupActivity”
如果您想在tabgroup中使用startActivityForResult,请告诉我,我将为此发布一个小补丁。您提到的这些项目是Tab吗?或者是您希望在当前选项卡下看到的其他活动?其他活动。。。我认为这是一个这样的想法,但我不确定,因为这对我来说是一个新事物:我正在尝试实现这一点,我会让你知道的
Intent i = new Intent(getParent(),ActivityB.class);
TabGroupActivity parentActivity = (TabGroupActivity)getParent();
parentActivity.startChildActivity("ActivityB", i);