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