[英]How to change multiple image at once in gridview in Android?
I'm working on AndroidStudio with Java.我正在使用 Java 开发 AndroidStudio。
I have many imageviews inside gridview.我在 gridview 中有很多图像视图。 and I'm trying to apply click event which affects multiple imageviews at the same time我正在尝试应用同时影响多个图像视图的点击事件
what I want to do is: when one imageview is clicked another imageview, which is not been clicked to change its image.我想要做的是:当单击一个 imageview 时,另一个 imageview 未被单击以更改其图像。
for example, there is two imageview A and B in same gridview.例如,在同一个 gridview 中有两个 imageview A 和 B。 if I click A imageview, both A and B imageview set to different imagesources.如果我单击 A imageview,A 和 B imageview 都设置为不同的图像源。
what I can do is change only clicked imageview.我能做的就是改变只点击imageview。 I want to know how to access the unclicked items in gridview.我想知道如何访问 gridview 中未点击的项目。 I made onclick listener inside adapter.我在适配器内部制作了 onclick 监听器。
public View getView(int position, View convertView, ViewGroup parent) {
convertView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.ingrid,parent,false);
ImageView blackorwhite = convertView.findViewById(R.id.blackOrWhite);
Integer val = mData.get(position);
blackorwhite.setImageResource(blockColor.get(val));
blackorwhite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
blackorwhite.setImageResource(R.color.white);
}
});
you can make an interface callback to know which item gets clicked for example this is ur interface您可以进行界面回调以了解单击了哪个项目,例如这是您的界面
interface OnClickListener {
void onClick(int position)
}
and pass this interface to ur Adapter, and in the getView method whenever a view get clicked u can call the onClick method of the interface并将此接口传递给您的适配器,并在 getView 方法中,每当单击视图时,您都可以调用该接口的 onClick 方法
this is example code这是示例代码
interface OnClickListener {
void onClick(int position);
}
public class GridViewAdapter extends BaseAdapter {
private List<String> list;
private OnClickListener listener;
private Context context;
public GridViewAdapter(Context context,List<String> list,OnClickListener listener){
this.listener = listener;
this.context = context;
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = LayoutInflater.from(context).inflate(ur layout);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
listener.onClick(position);
}
});
return view;
}
}
To initiate The adapter, u can use this code,要启动适配器,您可以使用此代码,
GridViewAdapter adapter = new GridViewAdapter(context, imageList, new OnClickListener() {
@Override
public void onClick(int position) {
// this method called every time an view get clicked
// and u can change the DataSet which now is imageList
// imageList.set(position,"something new ");
// after the change of DataSet u should cal the notifyDataSetChanged
adapter.notifyDataSetChanged();
}
});
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