改变图像的背景颜色中选择的GridView [英] Change background colour of image on selection in GridView
本文介绍了改变图像的背景颜色中选择的GridView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我创建images.i的一个GridView我试图c.But上选择图像不发生变化来改变图像的背景色上选择在以下$ C $。
的GridView =（GridView控件）rootView.findViewById（R.id.gridView）;
customGridAdapter =新GridViewAdapter（getActivity（），R.layout.row_grid，的getData（））;
gridView.setAdapter（customGridAdapter）;
gridView.setOnItemClickListener（新OnItemClickListener（）{
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V，
INT位置，长的id）{
//Toast.makeText(TeamFragment.this，位置+#Selected
// Toast.LENGTH_SHORT）.show（）;
数=位置;
gridView.setBackgroundColor（Color.argb（125,75,236,90））;
/ * INT currentPic =位置;
意向意图=新的Intent（）;
intent.setType（图像/ *）;
intent.setAction（Intent.ACTION_GET_CONTENT）;
startActivityForResult（Intent.createChooser（意向，选择图片），1）; * / } }）;
GridViewAdapter
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
查看排= convertView;
ViewHolder支架=无效; 如果（行== NULL）{
LayoutInflater充气=（（活动）上下文）.getLayoutInflater（）;
行= inflater.inflate（layoutResourceId，父母，假）;
持有人=新ViewHolder（）;
holder.imageTitle =（TextView中）row.findViewById（R.id.text）;
holder.image =（ImageView的）row.findViewById（R.id.image）;
row.setTag（保持器）;
}其他{
支架=（ViewHolder）row.getTag（）;
} row.setBackgroundColor（Color.RED）;
的ImageItem项= data.get（位置）;
holder.imageTitle.setText（item.getTitle（））;
holder.image.setImageBitmap（item.getImage（））;
返回行;
}
解决方案
在里面你GridViewAdapter getView（...）方法，您可以设置ImageView的OnClickListener如下，
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
ViewHolder支架=无效; 如果（convertView == NULL）{
LayoutInflater充气=（（活动）上下文）.getLayoutInflater（）;
convertView = inflater.inflate（layoutResourceId，父母，假）;
持有人=新ViewHolder（）;
holder.imageTitle =（TextView中）convertView.findViewById（R.id.text）;
holder.image =（ImageView的）convertView.findViewById（R.id.image）;
convertView.setTag（保持器）;
}其他{
支架=（ViewHolder）convertView.getTag（）;
} convertView.setBackgroundColor（Color.RED）;
的ImageItem项= data.get（位置）;
holder.imageTitle.setText（item.getTitle（））;
holder.image.setImageBitmap（item.getImage（））; 最终视图行= convertView; holder.image.setOnClickListener（新View.OnClickListener（）{ @覆盖
公共无效的onClick（查看为arg0）{
// TODO自动生成方法存根
row.setBackgroundColor（Color.yourColor）;
}
}）; 返回行;
}
不要忘了声明变量行作为最后的，因此可以在匿名内部类View.OnclickListener访问。
I have created a gridView of images.i am trying to change background colour of image on selection in the following code.But no change occurs on selecting an image.
gridView = (GridView)rootView.findViewById(R.id.gridView);
customGridAdapter = new GridViewAdapter(getActivity(), R.layout.row_grid, getData());
gridView.setAdapter(customGridAdapter);
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
//Toast.makeText(TeamFragment.this, position + "#Selected",
// Toast.LENGTH_SHORT).show();
count=position;
gridView.setBackgroundColor(Color.argb(125,75,236,90));
/*int currentPic = position;
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,"Select Picture"), 1);*/
}
});
GridViewAdapter
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.imageTitle = (TextView) row.findViewById(R.id.text);
holder.image = (ImageView) row.findViewById(R.id.image);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
row.setBackgroundColor(Color.RED);
ImageItem item = data.get(position);
holder.imageTitle.setText(item.getTitle());
holder.image.setImageBitmap(item.getImage());
return row;
}
解决方案
Inside getView(...) method in your GridViewAdapter, you can set OnClickListener for ImageView as follows,
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView== null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
convertView= inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.imageTitle = (TextView) convertView.findViewById(R.id.text);
holder.image = (ImageView) convertView.findViewById(R.id.image);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
convertView.setBackgroundColor(Color.RED);
ImageItem item = data.get(position);
holder.imageTitle.setText(item.getTitle());
holder.image.setImageBitmap(item.getImage());
final View row = convertView;
holder.image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
row.setBackgroundColor(Color.yourColor);
}
});
return row;
}
Don't forget to declare variable row as final so it can be accessed in anonymous inner class View.OnclickListener.
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