Develop Reference

Unable to navigate from app bar after setting focusable attribute

I am creating a very simple WebView app with a few useful links and I want the initial focus to be on the app bar with easy access to the menu. This works if I add focusable attributes to the layout in main.xml
android:focusable="true"
android:focusableInTouchMode="true"
However I'm unable to navigate away from the app bar to the WebView content below unless I add requestFocus to the menu actions:
case R.id.url:
webView.loadUrl("https://example.com");
webView.requestFocus();
Then I can navigate down to the WebView content below, but as soon as I return to the app bar navigation is lost again. How can I freely navigate away from the app bar?

So I added the following code to main.xml and it solves my issue
android:nextFocusDown="#+id/webview"

Hamburger to arrow animation not working programmatically

I have made a server directory browsing app which would change contents within the Activity itself. I have been adding a feature: Navigation Drawer and handling the Hamburger and Back icon on the Toolbar as follows:
Home directory:
Hamburger icon as the default state.
Would slide the navigation drawer on clicking the hamburger or at a sliding gesture.
No state-change or animation of the hamburger when the drawer is slided.
Animation of Hamburger to Back icon when a directory is chosen.
Any child directory:
Back button from the previous animation whose sole purpose is to go to a parent directory.
Would slide the navigation drawer at a sliding gesture.
No state-change or animation of the Back icon when the drawer is slided using gesture or when it goes into an another child directory of this directory.
Animation of Back Arrow to Hamburger icon when it comes back to Home directory using back icon or onBackPressed.
I am able to get the animation of Hamburger to Back icon using this answer (Code is used verbatim is as below) but wasn't able to get the Hamburger icon again when coming back into the home directory (didn't included that code and went for another approach which is the next part):
ValueAnimator anim = ValueAnimator.ofFloat(0f, 1f);
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
float slideOffset = (Float) valueAnimator.getAnimatedValue();
mDrawerToggle.onDrawerSlide(drawerLayout, slideOffset);
}
});
anim.setInterpolator(new DecelerateInterpolator());
// You can change this duration to more closely match that of the default animation.
anim.setDuration(500);
anim.start();
For appropriate switching between Hamburger and Back icons when browsing to and fro from home and child directories, I have used this answer (Code verbatim as below) as a reference and was able to successfully implement it for 1, 2 and 3 features of home and child directories.
private void enableViews(boolean enable) {
if(enable) {
mDrawerToggle.setDrawerIndicatorEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true); // comment this line of code
if(!mToolBarNavigationListenerIsRegistered) {
mDrawerToggle.setToolbarNavigationClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Doesn't have to be onBackPressed
onBackPressed();
}
});
mToolBarNavigationListenerIsRegistered = true;
}
}
else {
// Remove back button
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
getSupportActionBar().setHomeButtonEnabled(false); // comment this line of code
// Show hamburger
mDrawerToggle.setDrawerIndicatorEnabled(true);
// Remove the/any drawer toggle listener
mDrawerToggle.setToolbarNavigationClickListener(null);
mToolBarNavigationListenerIsRegistered = false;
}
}
Coming to the issue at hand which is: While browsing directories, of the switching to and fro from Hamburger to Back icon, the animation part is not working at all. But the states of both the icons are successfully changed along with their functionalities. Let me know if you need some more information for troubleshooting.

You can see a working example of navigation drawer activity if you just create a new project, add an activity and use template NavigationDrawer (if you use Android Studio. Otherwise download this repo)
When I want to learn a new layout I just load up the template and then change individual pieces of code until I have what I wanted. This way you can see what does what, what stops working when you delete some line and how things should be done.

I was finally able to solve it, came to know about the behaviour of the ActionBarDrawerToggle in a much deeper way after tinkering it with the default NavigationBarActivity from Android studio.
The overriding of onDrawerSlide of the mDrawerToggle to block the animation of hamburger by the sliding drawer was the cause of the same blocking of animation of hamburger to arrow in the animatior function in the first place. Notice these two lines from the two different pieces of code (didn't include it earlier, but you get the idea):
#Override
public void onDrawerSlide(View view, float slideOffset) {
// blocks the animation
super.onDrawerSlide(view, 0);
}
// from the animator function above
mDrawerToggle.onDrawerSlide(drawerLayout, slideOffset);
Solution: I removed the overrided onDrawerSlide function, but then, the sliding drawer hamburger to arrow animation would come back as well.
Counter-Solution: I also found out the sliding drawer animation of hamburger to arrow happens due to this line: mDrawerLayout.setDrawerListener(mDrawerToggle) which again is a deprecated function. So I just commented out this line and everything is working as expected.

Android tab bar with different fragments and different action bar icons

Problem Description and Question
I'm using tab activity with action bar. In the HOME tab I have GridView which contains some items, like it is shown in the image below (Hot Lines, Taxi, Restaurants etc)
Wen user click on the items in the grid view I want my application to take following actions:
Change icon of application to grid view item image on which I pressed.
Change the test near the icon
Add standard back button near icon, which will go back to grid view screen.
Change the tab fragment to the one which I specify.
Like it is shown in the image below:
As I never deal with this kind of problems can you please give me example or share some link with me of how I can do this? and can I do this at all?

This might help:
Android studio - is possible to add tabs pointing to fragments from designer?
It is not exactly what you want, but a good start. If you are willing to put a bit of work in it, you should be able to get what you want. If you have a basic Frame to work with and more specific problems with this matter I will gladly help you out ^^
John

The first link you can check is THIS.
And you should read more about ActionBar.
The last thing is it's better if you google it first and try to write a code and when you got stuck somewhere share your code with us and ask for help.

You have to use actionbarsherlock library for it.
use android.support.v4.app.FragmentTabHost and TabWidget in the xml as shown below :
<android.support.v4.app.FragmentTabHost
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
style="#style/yourstyle"/>
<FrameLayout
android:id="#+id/realtabcontent"
style="#style/realtabFrameContentStyle" />
<TabWidget
android:id="#android:id/tabs"
style="#style/yourtabstyle" />
</android.support.v4.app.FragmentTabHost>
Use SherlockFragmentActivity for showing the tabs.
In the activities code use following code (preferably in a function) to set the ctionbar icon and text :
activity.getSupportActionBar().setDisplayShowCustomEnabled(true);
activity.getSupportActionBar().setCustomView(R.layout.your_action_barlayout);
((TextView) (activity.getSupportActionBar().getCustomView().findViewById(R.id.action_bar_title))).setText("your title");
ImageView homeButton = ((ImageView) (activity.getSupportActionBar().getCustomView().findViewById(R.id.your_icon)));
homeButton.setVisibility(View.VISIBLE);
homeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, YourHOmeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
activity.startActivity(intent);
activity.finish();
}
});
ActionBar mActionBar = activity.getSupportActionBar();
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
mActionBar.show();
then call this function with your icon and your text in your fragments onResume() method.

How to DISABLE status bar in Android?

I want to disable status bar in my application.
link
with:
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
I still can activate status bar with fast swipe from top to bottom screen.
Is possible to fully deactivate it?

What API version are you using? Anyway in the dedicated android developers page (Hiding the Status Bar) there is a detailed explanation on how to do it with additional clarification for API<16. In particular if the status bar should always remain hidden in your app you should set the activity theme in your app's manifest file as follows:
<application
...
android:theme="#android:style/Theme.Holo.NoActionBar.Fullscreen" >
...
</application>

Displaying menu items in the Android ICS action bar

I've got an app that I've written targeting Android 2.1 which makes use of the menu button to expose some options. I'd like to have this menu available through the action bar overflow button in ICS, but I'm having trouble with getting it to show up.
If I change my target API to 15, the legacy menu button in the bottom bar disappears in ICS, but the icon in the top right of the action bar doesn't replace it, so there is no way to access the menu. I've tried adding the showAsAction attribute to the menu items, which did nothing. I'm definitely targeting 4.0.3 in my Eclipse build options.
All I want is for that menu to be accessible somewhere whilst using the ICS Holo theme, but still backwards compatible to older devices. How do I go about that?

Usually you add those Action Items simply by implementing the onCreateOptionsMenu(Menu menu) and adding the android:showAsAction="ifRoom" for the desired items in the menu's XML file.
e.g.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/menu_save"
android:icon="#drawable/ic_menu_save"
android:title="#string/menu_save"
android:showAsAction="ifRoom|withText" />
</menu>
Did you consider this fact?
Edit:
Here is a simple implemantation which worked for me a while ago:
#Override
public boolean onCreateOptionsMenu(Menu menu){
super.onCreateOptionsMenu(menu);
createMenu(menu);
return true;
}
private void createMenu(Menu menu){
MenuItem mnu1 = menu.add(0, 0, 0, "Logout");
{
mnu1.setAlphabeticShortcut('a');
mnu1.setIcon(R.drawable.icon);
mnu1.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
}
}

I was having this issue 5 minutes ago. Dont know if this can be still helpful, but this is how I got it solved:
Add super.setBooleanProperty("showTitle", true); to your onCreate method
#Override
public void onCreate(Bundle savedInstanceState) {
super.setBooleanProperty("showTitle", true);
super.onCreate(savedInstanceState);
//more code...
This will force the action bar to show and the menu button replacement will be there.
I am targeting android 4 in eclipse. Older devices show the bar as title only and of course are listening to default menu button action.