should I still use app compat v7 if my app has minSdk = 14?
Is there any advantage with ActionBar in Android L ?
Should I use android.support.v4.app.FragmentActivity from support v4 or should I use the android.app.Activity class (which has support for fragments since honeycomb)?
Should I also use android.app.Fragment or android.support.v4.app.Fragment?
I guess that I should use support v4 FragmentActivity and Fragment, but there is no need for app compat v7, right?
What do you think?
If you want to use Material Design style for SDK 14+, you should also use AppCompat v7:21.0.+
You app can use Material as its main theme, and functional from API 7.
More info you can check this link
AppCompat is used for api level below 11. Since 11 you have action bar natively. So there is no need to use AppCompat on api levle 11 and above.
Extend Activtiy and use Fragment ( not android.support.v4.app.Fragment)
Related
Given the following:
Android documentation says :
AppCompatActivity - Adds an application activity class that can be used as a base class for activities that use the Support Library action bar implementation.
I'm not considering adding action bar to my activity
I need some material design widgets, which I can control only through AppCompat or material theme, but the latest need API >= 21, which is not my case.
I tested Theme.AppCompat.Light.NoActionBar with Activity class and it works well.
--
Is there an issue with using Activity class with AppCompat theme in my case?
The AppCompat library is intended to make compatibility with olders API, so the Theme and all components may work well in older systems.
I think the only concern is to always use the AppCompat elements and not the regular ones.
Example, use AppCompatEditText, AppCompatTextView, etc... And always refers to they with the AppCompat (AppCompatEditText editText;)
I have used a lot the support library and not have others issues, considering the visual elements may be a little different when using an API minor than 21
No.There is not issues with AppcompactActivity & support libaray. You can refere this link
To gain more rich & amazing look go with support library,Try to do material design
I am building app with the sdk levels (min 19- max 22), And i want to use material design in my app. Should i extend Activity or AppcompatActivity? What is the difference? I know AppcompatActivity is support library for backward compatability, Other than that is there any main difference between both?
Extending Activity is deprecated so you should use AppCompatActivity.
Ya we can.Just add the library in the Gradle file and use it in the activity.
I have a problem with ActionBar.
I set minsdk in AndroidManifest to 14. Next I create Activity (BlankActivity), thats create MyACtivity class which extend ActionBarActivity and import android.support.v7.app.ActionBarActivity. I think that this library need only if you use sdk level 7 or lower.
This import correctly? Or i need use another extend class?
And I try change extend class to Activity, but its does not create ActionBar on Activity.
How add ActionBar on this Activity?
P.S. I was misled, because on my sdk function getActionBar must work, its NullPointer, because my app use this strange import. A can use getSupportActionBar, but its strange use support library for sdk 7 to create Application for sdk 14 or higher.
P.S.S. Thanks!!
If anybody have same problen, there is some links about toolbar:
http://www.101apps.co.za/index.php/articles/using-toolbars-in-your-apps.html
Why was ActionBarActivity deprecated
I have a problem with ActionBar.
Who doesn't ;)
I think that this library need only if you use sdk level 7 or lower.
The appcompat-v7 library used to backport API 14 Action Bar to platforms below that. APIs 7 through 13 used this reimplementation, APIs from 14 used native Action Bar.
Since Lollipop the appcompat-v7 always uses it's own implementation of Action Bar and backports Material theme from Lollipop.
This import correctly? Or i need use another extend class?
To have the Action Bar with appcompat-v7 your activity class must extend AppCompatActivity (previously ActionBarActivity) and it's theme must descend from Theme.AppCompat.* family.
And I try change extend class to Activity, but its does not create ActionBar on Activity.
Native activities on Lollipop don't have any Action Bar by default. You would supply it by having a Toolbar widget in your layout and calling setActionBar(Toolbar). Similar approach can also be used with appcompat-v7 (if you use a theme without default action bar) by calling setSupportActionBar(Toolbar).
How add ActionBar on this Activity?
[...] but its strange use support library for sdk 7 to create Application for sdk 14 or higher.
It's perfectly OK, the goal is to make the app look the same from API 7 to API 22. Appcompat-v7 now backports not only the Action Bar but Material theme as well.
It's better you start with a working example. Just check in you android sdk installation for the folder \samples\android-21\ui\ActionBarCompat-Basic.
The use of the support library is correct, just follow the ActionBar Developer guide here.
In the support library appCompat v7 of the Android platform, there is a android.support.v7.widget.LinearLayoutCompat class.
Does someone know why this class exist? The original LinearLayout class exist since API level 1 so I don't understand why there is a compat version.
The class LinearLayout exists since API level 1, but some APIs were added after that, for example, setShowDividers introduced on API level 11.
So in this case setShowDividers (and it's parameters) should be invoked using LinearLayoutCompat instead LinearLayout if you are targeting a platform with API level below 11.
In my app I have a some fragments that I switch between manually in the phone version and I want to show the < arrow in the ActionBar. To do this I know I need to call actionBar.setDisplayHomeAsUpEnabled(true); but that breaks in lower api levels. I can check the api level and only call it in 3.0+ but LINT gives me an error. Is it alright to just suppress the error? What's the right way to do this?
First setup ActionBarSherlock for compatibility for Android 2.1+ for the ActionBar:
http://actionbarsherlock.com/
https://github.com/JakeWharton/ActionBarSherlock
One you have set up this great compatibility library, you can now use in your Fragment:
getSherlockActivity().getSupportActionBar().setDisplayShowTitleEnabled(true);
Make sure you extend your Fragments to SherlockFragments:
public class TestFragment extends SherlockFragment
If you need anymore help, let me know I have set this up many times!
Regards,
Use Jake Wharton's action bar sherlock library which is more flexible to support in all versions.
https://github.com/JakeWharton/ActionBarSherlock
If you need use the actionbar in android 3 and higher only, you can suppress warnings (be shure that min api level is set). But else you have to use SharlockActionBar library.