CalligraphyUtils.java 文件源码

/**
 * Tries to pull the Font Path from the Text Appearance.
 *
 * @param context     Activity Context
 * @param attrs       View Attributes
 * @param attributeId if -1 returns null.
 * @return returns null if attribute is not defined or if no TextAppearance is found.
 */
@FontRes
static int pullFontPathFromTextAppearance(final Context context, AttributeSet attrs, int[] attributeId) {
    if (attributeId == null || attrs == null)
        return 0;
    int textAppearanceId = -1;
    // For prevent using default component font
    final ContextThemeWrapper contextThemeWrapper = new ContextThemeWrapper(context, android.R.style.Theme_NoDisplay);
    final TypedArray typedArrayAttr = contextThemeWrapper.obtainStyledAttributes(attrs, ANDROID_ATTR_TEXT_APPEARANCE);
    if (typedArrayAttr != null) {
        try {
            textAppearanceId = typedArrayAttr.getResourceId(0, 0);
        } catch (Exception ignored) {
            // Failed for some reason
            return 0;
        } finally {
            typedArrayAttr.recycle();
        }
    }

    final Integer textAppearanceAttrs = getFontFromTextAppearance(context, attributeId, textAppearanceId);
    if (textAppearanceAttrs != null) return textAppearanceAttrs;
    return 0;
}