SuggestionsAdapter.java 文件源码

private Drawable getActivityIconWithCache(ComponentName component) {
    String componentIconKey = component.flattenToShortString();
    if (this.mOutsideDrawablesCache.containsKey(componentIconKey)) {
        ConstantState cached = (ConstantState) this.mOutsideDrawablesCache.get(componentIconKey);
        if (cached == null) {
            return null;
        }
        return cached.newDrawable(this.mProviderContext.getResources());
    }
    Drawable drawable = getActivityIcon(component);
    this.mOutsideDrawablesCache.put(componentIconKey, drawable == null ? null : drawable.getConstantState());
    return drawable;
}