In my application I use Sherlock actionbar with sliding menu.
I can use the sliding menu toggle from Sherlock Fragment activity like this:
switch (item.getItemId()) {
case android.R.id.home:
toggle();
break;}
but now I am trying to hide the actionbar and want to use the actionBar menu button from fragments.
I hide the actionbar, but how can I use the toggle() from fragments?
Can anyone give me an idea how can I use android.R.id.home action from fragment instead of fragmentActivity?
Two way to done this:
In your Activity override onOptionsItemSelected and handle home button clicked and call super for other options menu. (new for home the toggle() will be called and other menu options you can handle them in the Fragment)
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
toggle();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
define an interface in your Fragment and implements it on the Activity. Call the interface function on case android.R.id.home in the Fragment, then call toggle() in the Activity.
Related
I've a Preference activity for a options menu in my Android app.
I've enabled the Up \ Back navigation on the ActionBar and I need to come back to the previous activity that called the Options menu.
For the Preference activity, I could use in the manifest:
android:parentActivityName="mypackage.com.MainActivity"
but how come back to other activies ? The Options menu is called from 4 different activities.
public class Prefs extends PreferenceActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
ActionBar actionBar = getActionBar();
// Enabling Up / Back navigation
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
Make sure that you have declared the parent activity in the manifest like this...
<activity
android:name="com.myapp.SetPreferenceActivity"
android:parentActivityName="com.myapp.MainActivity"
>
and then make sure to add the case into your onOptionsItemSelected method...
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
//Take me back to the main activity
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
if you prefer to have the up button point to a custom activity, you can just use an intent.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
Intent changeActivity = new Intent(this,OtherActivity.class);
startActivity(changeActivity);
return true;
}
return super.onOptionsItemSelected(item);
}
The default behaviour of the Back button is that it will get you back to the calling activity. The system maintains a back stack of activities while the user navigates the application. Do you need to override this functionality? Please be more specific.
Solved in this way:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
}
return true;
}
I am using actionBar.setDisplayHomeAsUpEnabled(true); for back navigation functionality but it is not working as properly as i need it and when i am using back button of my phone it works properly.
Is there any way to code on a button such that it work same as back navigation button of phone?
Along with
actionBar.setDisplayHomeAsUpEnabled(true);
or
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
you can try using this in Activity, too:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
So your menu item "Home"'s click will be handled using that.
I know this has been answered, but i always do this in my method when having the same back-button-like capability in another ActionBarActivity.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case android.R.id.home:
finish();
break;
}
return super.onOptionsItemSelected(item);
}
and ofcourse:
actionBar.setDisplayHomeAsUpEnabled(true);
You may/may not used this, its up to you :)
I'm doing an app for Android. In the DetailActivity, there is the ActionBar with the Up Button. When I press it, it would return in the previous activity. But the DetailActivity can be launched from different activity.
Instead of using NavUtils.navigateUpTo(this, upIntent) , you can just use finish() or onBackPressed(). This would finish the activity, and go back to the previous one. So handling of the Up button being pressed would look like this:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
Is there any way to use the standard menu button in the action bar to do something? In my case a sliding menu, I already have code that works in the onClick of a normal button. I just want to use the menu button in the action bar instead. Is this possible? Or will I have to customize the action bar and not use the button that is already there?
I believe you mean the ActionBar Home icon.
First you have to enable it
getActionBar().setHomeButtonEnabled(true);
Then you have to handle the event
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
//do your work
return true;
default:
return super.onOptionsItemSelected(item);
}
}
FYI if you want to follow the Navigation drawer pattern you should read this tutorial.
Activity A ===click button===> Activity B
When press back button, Activity A is not recreated.
When press home as up button, Activity A is recreated.
So I save state when A.onSaveInstanceState(Bundle outState)
, and use state when A.onRestoreInstanceState(Bundle savedInstanceState).
Saving and Using works fine (except home as up button)
.
However,
When pressed home as up button,
system recreate Activity A, and savedInstanceState is gone.
How can I use Saved Instance State?
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// I do not want this...
// Home as up button is to navigate to Home-Activity not previous acitivity
super.onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
In the onCreate() enable the home button.
#Override
public void onCreate(Bundle savedInstanceState) {
...
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
In the onOptionItemSelected() method do this.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
This should enable Up navigation. If you want the parent activity to be restored with a savedInstanceState. You should set launchMode="singleTop" in the parent activity in Manifest file.
For more info check out http://developer.android.com/: Providing Up Navigation
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
I used finish() insteed of NavUtils;
As #Joachim mentioned in a comment, there is a difference between R.id.home and android.R.id.home. In my case, I have been using R.id.home, which did not work, and android.R.id.home did work.