onclick方法中引用外部其它元素需要final问题解决

造成原因：View.OnClickListener是一个内部匿名类。在内部匿名类中调用外部类元素需要final

解决办法：

class FollowOnClickListener implements ImageView.OnClickListener {
            private ImageView iconImageView;
            private TextView nameTextView;

            public FollowOnClickListener(ImageView iconIV, TextView nameTV) {
                iconImageView = iconIV;
                nameTextView = nameTV;

            }

            public void onClick(View v) {
                if (!mFollowFile.exists()) {
                    mHandler.sendEmptyMessage(12);
                    return;
                }
                flag[location] = !flag[location];
                if (flag[location]) {
                    ((ImageView) v).setImageResource(R.drawable.unfollow_icon);

                    // 取消关注 置灰
                    nameTextView.setTextColor(Color.parseColor(Constants.COLOR_LIGHT_GRAY));
                    iconImageView.setImageBitmap(BitmapUtils
                            .toGrayscale(contact.getContactPhotoBitmap()));
                } else {
                    ((ImageView) v).setImageResource(R.drawable.follow_icon);

                    nameTextView.setTextColor(Color.parseColor(Constants.COLOR_BLACK));
                    iconImageView.setImageBitmap(contact
                            .getContactPhotoBitmap());
                }

                Message msg = new Message();
                msg.what = 7;
                msg.arg1 = location;
                mHandler.sendMessage(msg);

            }

        }
        viewHolder.unFollowImageView
                .setOnClickListener(new FollowOnClickListener(
                        viewHolder.iconImageView, viewHolder.nameFollowTextView));

REFERENCES:http://stackoverflow.com/questions/11757306/android-setonclicklistener-onclick-method-non-final-variable

http://zhidao.baidu.com/question/289905031.html