1st version that works

libSafeMobile/src/main/java/com/safemobile/uicomponents/EnhancedTextView.java

@@ -0,0 +1,84 @@
+package com.safemobile.uicomponents;
+
+import java.util.Hashtable;
+
+import com.safemobile.lib.R;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Typeface;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+public class EnhancedTextView extends TextView {
+
+	private static final Hashtable<String, Typeface> cache = new Hashtable<String, Typeface>();
+
+	public EnhancedTextView(Context context) {
+		super(context);
+	}
+
+	public EnhancedTextView(Context context, AttributeSet attrs) {
+		super(context, attrs);
+		setCustomFont(context, attrs);
+	}
+
+	public EnhancedTextView(Context context, AttributeSet attrs, int defStyle) {
+		super(context, attrs, defStyle);
+		setCustomFont(context, attrs);
+	}
+
+	/**
+	 * Set a custom TypeFace that is specified in the XML attrs of the object 
+	 * @param ctx The context of the application
+	 * @param attrs The attributes which are passed from the XML
+	 */
+	private void setCustomFont(Context ctx, AttributeSet attrs) {
+		TypedArray a = ctx.obtainStyledAttributes(attrs, R.styleable.EnhancedTextView);
+		String customFont = a.getString(R.styleable.EnhancedTextView_setFont);
+		setCustomFont(ctx, customFont);
+		a.recycle();
+	}
+
+	/**
+	 * Function to change the TypeFace/Font of a textView
+	 * @param ctx The context of the application
+	 * @param fontName The name of the TypeFace which needs to be set
+	 * @return A boolean telling if the TypeFace was set, or false in case of error
+	 */
+	public boolean setCustomFont(Context ctx, String fontName) {
+		Typeface tf = getTypeFace(ctx, fontName);
+		if(tf == null)
+			return false;
+
+		setTypeface(tf);  
+		return true;
+	}
+
+
+	/**
+	 * In the Android versions previous than 4.0 there is a memory leak that won't free TypeFaces. 
+	 * In order to fix this issue, a HashMap (cache) of TypeFaces will be created that will fetch a TypeFace
+	 * if it exists, or it will create it and then return it. 
+	 * @param c The context of the application
+	 * @param fontName The name of the typeface which needs to be fetched
+	 * @return The desired Typeface object, or null if the typeface wasn't in the cache and could not be created
+	 */
+	public static Typeface getTypeFace(Context c, String fontName){
+		synchronized(cache){
+			if (cache == null || fontName == null) 
+				return null;
+			
+			if(!cache.containsKey(fontName)){
+				try {
+					Typeface t = Typeface.createFromAsset(c.getAssets(), fontName);
+					cache.put(fontName, t);
+				}
+				catch(Exception ex) {
+					return null;
+				}
+			}
+			return cache.get(fontName);
+		}
+	}
+}