项目中需要横向滚动效果,按照以前的思路,我会写一个ScrollView,里边加一个LinearLayout,在代码中动态加入控件,然后动态删除或者改变颜色,现在android有了新控件RecyclerView,可以方便的实现这样的功能,具体使用方法请参考这篇文章:Android 自定义RecyclerView 实现真正的Gallery效果
主要问题在于,我点击一个item,改变颜色,点击其他项,改变颜色,上一次点击的变回原来的颜色,刚开始实现的方法是在控件上直接修改,发现滑动的时候,颜色会乱掉,所以在adapter里边加入一个list进行标记,根据标记改变控件颜色
相应的adapter
public class AddDeviceAdapter extends RecyclerView.Adapter<AddDeviceAdapter.ViewHolder> /*implements View.OnClickListener*/{
private OnItemClickListener mOnItemClickListener = null;
private LayoutInflater mInflater;
private List<AddDevice> mDatas;
private AddDevice addDevice;
private List<Boolean> isClicks;//控件是否被点击,默认为false,如果被点击,改变值,控件根据值改变自身颜色
public AddDeviceAdapter(Context context, List<AddDevice> datas) {
mInflater = LayoutInflater.from(context);
mDatas = datas;
isClicks = new ArrayList<>();
for(int i = 0;i<mDatas.size();i++){
isClicks.add(false);
}
}
public void setDatas(List<AddDevice> datas) {
mDatas = datas;
L.e("AddDeviceAdapter's mDatas===" + new Gson().toJson(mDatas));
}
public void setOnItemClickLitener(OnItemClickListener mOnItemClickListener) {
this.mOnItemClickListener = mOnItemClickListener;
}
@Override
public int getItemCount() {
return mDatas.size();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = mInflater.inflate(R.layout.item_add_device, viewGroup, false);
ViewHolder viewHolder = new ViewHolder(view);
viewHolder.viewSpace = view.findViewById(R.id.viewSpace);
viewHolder.ivAddDevice = (ImageView) view.findViewById(R.id.ivAddDevice);
viewHolder.tvAddDevice = (TextView) view.findViewById(R.id.tvAddDevice);
//将创建的View注册点击事件
// view.setOnClickListener(this);
return viewHolder;
}
@Override
public void onBindViewHolder(final ViewHolder viewHolder, final int i) {
addDevice = mDatas.get(i);
viewHolder.ivAddDevice.setImageResource(addDevice.getResId());
viewHolder.tvAddDevice.setText(addDevice.getItemText());
//将数据保存在itemView的Tag中,以便点击时进行获取
viewHolder.itemView.setTag(viewHolder.tvAddDevice);
if(isClicks.get(i)){
viewHolder.tvAddDevice.setTextColor(Color.parseColor("#00a0e9"));
}else{
viewHolder.tvAddDevice.setTextColor(Color.parseColor("#ffffff"));
}
// if(addDevice.isFirst()) {
// viewHolder.viewSpace.setVisibility(View.GONE);
// }
// 如果设置了回调,则设置点击事件
if (mOnItemClickListener != null) {
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int i = 0; i <isClicks.size();i++){
isClicks.set(i,false);
}
isClicks.set(i,true);
notifyDataSetChanged();
mOnItemClickListener.onItemClick(viewHolder.itemView,viewHolder.tvAddDevice, i);
}
});
}
}
/* @Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
//注意这里使用getTag方法获取数据
mOnItemClickListener.onItemClick(, textView,(int)v.getTag());
}
}*/
public static class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View arg0) {
super(arg0);
}
View viewSpace;
ImageView ivAddDevice;
TextView tvAddDevice;
}
public interface OnItemClickListener {
void onItemClick(View view, TextView textView,int position);
}
}