Performance issue on custom font TextView

android, performance, textview

Solution

Why don't you keep the created `typface` object in memory so that you don't create every time the text view is getting created.

Following is a sample class that creates and cache the typeface object:

public class TypeFaceProvider {

    public static final String TYPEFACE_FOLDER = "fonts";
    public static final String TYPEFACE_EXTENSION = ".ttf";

    private static Hashtable<String, Typeface> sTypeFaces = new Hashtable<String, Typeface>(
        4);

    public static Typeface getTypeFace(Context context, String fileName) {
    Typeface tempTypeface = sTypeFaces.get(fileName);

    if (tempTypeface == null) {
        String fontPath = new StringBuilder(TYPEFACE_FOLDER).append('/').append(fileName).append(TYPEFACE_EXTENSION).toString();
        tempTypeface = Typeface.createFromAsset(context.getAssets(), fontPath);
        sTypeFaces.put(fileName, tempTypeface);
    }

    return tempTypeface;
    }
}

Problem

I have a custom TextView, with a personalized font attribute: ``` public class TextViewPlus extends TextView { private static final String TAG = "TextViewPlus"; public TextViewPlus(Context context) { super(context); } public TextViewPlus(Context context, AttributeSet attrs) { // This is called all the time I scroll my ListView // and it make it very slow. super(context, attrs); setCustomFont(context, attrs); } public TextViewPlus(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); setCustomFont(context, attrs); } private void setCustomFont(Context ctx, AttributeSet attrs) { TypedArray a = ctx.obtainStyledAttributes(attrs, R.styleable.TextViewPlus); String customFont = a.getString(R.styleable.TextViewPlus_customFont); setCustomFont(ctx, customFont); a.recycle(); } public boolean setCustomFont(Context ctx, String asset) { Typeface tf = null; try { tf = Typeface.createFromAsset(ctx.getAssets(), asset); setTypeface(tf); } catch (Exception e) { Log.e(TAG, "Could not get typeface: "+e.getMessage()); return false; } return true; } } ``` I'm using it in my XML files with the attribute customFont="ArialRounded.ttf", and it is working quite well. I'm using this TextViewPlus in a ListView, populated with an ArrayAdapter. ``` TextViewPlus dataText = (TextViewPlus) itemView.findViewById(R.id.data_text); dataText.setText("My data String"); ``` My problem is that the performance, when I'm scrolling the ListView, are terrible! Very slow and full of lags. The TextViewPlus constructor n°2 it's called all the time i scroll the list. If I change TextViewPlus in a normal TextView, and use dataText.setTypeface(myFont), everything is smood and is working well. How can I use my TextViewPlus without performance issue?

Original source