将android:fontFamily传入Android中的自定义视图

public class CustomView extends View {
    private Typeface typeface;

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomView);
        String fontPath = a.getString(R.styleable.CustomView_android_fontFamily);
        a.recycle();

        if (fontPath != null) {
            typeface = Typeface.createFromAsset(context.getAssets(), fontPath);
        } else {
            // 默认字体
            typeface = Typeface.DEFAULT;
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        // 应用字体样式
        if (typeface != null) {
            Paint paint = new Paint();
            paint.setTypeface(typeface);
            // 绘制文本
            canvas.drawText("Hello, Custom View!", 0, 0, paint);
        }
    }
}