Access ActionBar Title TextView For All Android, Setting Marquee To It And Also Detecting If Marquee Is Activated And Hence Shrinking(Customizing) TextView

custom_actionbar

This is about how to access action bar title for all versions, detecting if marquee is activated for the actionbar title and if it is then customizing the font. 
This mainly emphasizing on avoiding custom view as long as one can access actionbar title textview this way. 
Since there is no direct way to customize the title TextView in android, a way is :

	getResources().getIdentifier(String resId, String resType, String package);
	
So when it comes for actionbar in all versions of android we can access it as :
	
        int titleId = 0;
        if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB)
        {
            titleId = getResources().getIdentifier("action_bar_title", "id", "android");
        }
        else
        {
            titleId = R.id.action_bar_title;
        }
	
	And following is the code for detecting if marquee is activated or not and then changing the font style and shrinking it if marquee gets activated
	
    /**
     * This method adds the marquee effect to the textview in case its long enough to fit with in the screen
     * @param iTitle string defining content to set as title
     */
    private void createCustomTitleTxv(String iTitle)
    {
	    	// Spannable for customizing font
        SpannableString spannable = new SpannableString(iTitle);
        spannable.setSpan(new TypefaceSpan("Helvetica"), 0, spannable.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

		    int titleId = 0;
        if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB)
        {
            titleId = getResources().getIdentifier("action_bar_title", "id", "android");
        }
        else
        {
            titleId = R.id.action_bar_title;
        }

		// titleTxv : member reference to the action bar title textview
		// Setting Marquee here 
        titleTxv = (TextView) findViewById(titleId);
        titleTxv.setEllipsize(TextUtils.TruncateAt.MARQUEE);
        titleTxv.setMarqueeRepeatLimit(-1);
        titleTxv.setFocusable(true);
        titleTxv.setFocusableInTouchMode(true);
        titleTxv.setHorizontallyScrolling(true);
        titleTxv.setFreezesText(true);
        titleTxv.setSingleLine(true);
        titleTxv.setText(spannable);

        // Adding listener for listening changes in layout of textview
        titleTxv.getViewTreeObserver().addOnGlobalLayoutListener(mMarqueeListener);

        titleTxv.post(new Runnable() {
            @Override
            public void run() {
			
			// Final callback to check if marquee was activated or do the Shrinking text size
                if(mMarqueeActivated) {
                    float shrinkSize = getResources().getDimension(R.dimen.shrink_exc_name_size);                  
                    titleTxv.setTextSize(shrinkSize);
                }
            }
        });

    }

    /**
     * This listener (for listening layout changes in view tree) here will be used to detect if marquee is activated and hence allows to shrink the size of title TextView and customize it
     */
    private ViewTreeObserver.OnGlobalLayoutListener mMarqueeListener = new ViewTreeObserver.OnGlobalLayoutListener(){
        @Override
        public void onGlobalLayout() {
            if(titleTxv!=null)
            {
				// Reference to the layout on which text is drawn
                Layout titleLayout = titleTxv.getLayout();
                if ( titleLayout != null){
                    if(titleTxv.getWidth()<(int)titleLayout.getLineWidth(0))
                    {
                        // Marquee Effect. So Shrinked Customized TextView
                        mMarqueeActivated = true;
						
						// Remove listener
						titleTxv.getViewTreeObserver().removeGlobalOnLayoutListener(this)
                    }
                }
            }
        }
    };
	
	
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