SkinCompatViewInflater.java 文件源码

/**
 * android:onClick doesn't handle views with a ContextWrapper context. This method
 * backports new framework functionality to traverse the Context wrappers to find a
 * suitable target.
 */
private void checkOnClickListener(View view, AttributeSet attrs) {
    final Context context = view.getContext();

    if (!(context instanceof ContextWrapper) ||
            (Build.VERSION.SDK_INT >= 15 && !ViewCompat.hasOnClickListeners(view))) {
        // Skip our compat functionality if: the Context isn't a ContextWrapper, or
        // the view doesn't have an OnClickListener (we can only rely on this on API 15+ so
        // always use our compat code on older devices)
        return;
    }

    final TypedArray a = context.obtainStyledAttributes(attrs, sOnClickAttrs);
    final String handlerName = a.getString(0);
    if (handlerName != null) {
        view.setOnClickListener(new DeclaredOnClickListener(view, handlerName));
    }
    a.recycle();
}