我gridview有3个单元格，每个单元格都有ImageView和ImageButton来添加图库或相机中的图像。
但是当我试图在gridview的点击单元格中设置所选图像时，它会替换所有单元格，而不是单击一个单元格。
这是gridview的适配器
public class Adapter_For_GridView extends RecyclerView.Adapter<Adapter_For_GridView.ViewHolder>{
public static final String TAG="===GridView Pics===";
ViewClickCallback viewClickCallback;
Context context;
List<UserGrid> userGridList;
UserGrid userGridWrapper;
String ImageData;
public Adapter_For_GridView(ViewClickCallback viewClickCallback,Context context) {
this.viewClickCallback=viewClickCallback;
this.context=context;
}
@Override
public Adapter_For_GridView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.user_profile_photo_single_item,parent,false);
ViewHolder viewHolder=new ViewHolder(view);
Log.d(TAG,"On Create View Holder ");
return viewHolder;
}
@Override
public void onBindViewHolder(Adapter_For_GridView.ViewHolder holder, int position) {
userGridWrapper=userGridList.get(position);
Log.d(TAG,"On Bind View Holder- Value of isUpload "+userGridWrapper.isUpload());
Log.d(TAG,"On Bind View Holder Image Data "+ImageData);
Log.d(TAG,"On Bind View Holder Position "+position+" "+"User Grid Wrapper "+userGridWrapper);
Log.d(TAG,"On Bind View Holder User Grid Wrapper Get Image Path "+userGridWrapper.getImagePath());
if (ImageData!=null){
Log.d(TAG,"Image Data is Not Null "+ImageData);
userGridWrapper.setUpload(true);
if (userGridWrapper.isUpload()){
holder.imageButton.setImageResource(R.drawable.ic_clear_black_24dp);
Picasso.with(context).load(ImageData)
.into(holder.imageView);
}
}
else{
holder.imageButton.setImageResource(R.drawable.ic_add_black_24dp);
}
}
@Override
public int getItemCount() {
Log.d(TAG,"Value at GetItemCount of GridList "+userGridList.size());
if (userGridList!=null){
return userGridList.size();
}
return 2;
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView imageView;
ImageButton imageButton;
public ViewHolder(View itemView) {
super(itemView);
Log.d(TAG,"On View Holder");
itemView.setOnClickListener(this);
imageView= (ImageView) itemView.findViewById(R.id.User_Pics);
imageButton= (ImageButton) itemView.findViewById(R.id.imageButton);
imageButton.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Log.d(TAG,"Image Button Clicked "+getAdapterPosition()+" Get Layout Position "+getLayoutPosition());
if (viewClickCallback!=null){
Log.d(TAG,"ViewClickcalleback is not null ");
viewClickCallback.viewClicked(getAdapterPosition()+1);
}
}
}
public void setUserGridList(List<UserGrid> userList ){
this.userGridList=userList;
}
public void setImagePath(String path,int position){ //GETTING IMAGE HERE FROM ONACTIVITYRESULT TO THIS ADAPTER
this.ImageData=path;
Log.d(TAG,"Position of Grid "+position); //POSITION OF CLICKED ITEM
Log.d(TAG,"Set Image Path "+path); //IMAGE PATH OF SELECTED IMAGE
notifyDataSetChanged();
}
}
来自onactivityresult的LogCat
01-31 18:13:47.917 9146-9146/com.example.com.pro_working1 D/===User Profile===: User Profile On Activity Result Calling 25 -1
01-31 18:13:47.927 9146-9146/com.example.com.pro_working1 D/===User Profile===: On Activity Result Calling--Request Code 25
01-31 18:13:47.927 9146-9146/com.example.com.pro_working1 D/===User Profile===: Intent Data Intent { dat=content://media/external/images/media/19276 typ=image/jpeg flg=0x1 }
01-31 18:13:47.927 9146-9146/com.example.com.pro_working1 D/===User Profile===: On Activity Result Position 0
01-31 18:13:48.687 9146-9146/com.example.com.pro_working1 D/===User Profile===: Image Name content://media/external/images/media/19276
01-31 18:13:48.687 9146-9146/com.example.com.pro_working1 D/===User Profile===: Image /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:48.687 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Position of Grid 0
01-31 18:13:48.687 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Set Image Path /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:48.777 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Value at GetItemCount of GridList 3
01-31 18:13:48.777 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Value at GetItemCount of GridList 3
01-31 18:13:48.777 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Value at GetItemCount of GridList 3
01-31 18:13:48.787 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder- Value of isUpload false
01-31 18:13:48.787 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Image Data /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:48.787 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Position 0 User Grid Wrapper com.example.com.pro_working1.User_Gallery.UserGrid@41c239c8
01-31 18:13:48.787 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder User Grid Wrapper Get Image Path null
01-31 18:13:48.787 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Image Data is Not Null /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Value at GetItemCount of GridList 3
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder- Value of isUpload false
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Image Data /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Position 1 User Grid Wrapper com.example.com.pro_working1.User_Gallery.UserGrid@41c23e88
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder User Grid Wrapper Get Image Path null
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Image Data is Not Null /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Value at GetItemCount of GridList 3
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder- Value of isUpload false
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Image Data /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder Position 2 User Grid Wrapper com.example.com.pro_working1.User_Gallery.UserGrid@41c241a8
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: On Bind View Holder User Grid Wrapper Get Image Path null
01-31 18:13:49.557 9146-9146/com.example.com.pro_working1 D/===GridView Pics===: Image Data is Not Null /storage/sdcard0/pictures/Social/1/Spread-Unconditional-Love_www.example.com-101.jpg
答案 0 :(得分：0)
这种情况正在发生，因为您使用单个varibale ImageData 来存储所选图像的路径。因此，当在gridview中重新创建视图时，此varibale值将相同，这将使下面的代码片段中的第一个条件为真。
if (ImageData!=null){
Log.d(TAG,"Image Data is Not Null "+ImageData);
userGridWrapper.setUpload(true);
if (userGridWrapper.isUpload()){
holder.imageButton.setImageResource(R.drawable.ic_clear_black_24dp);
Picasso.with(context).load(ImageData)
.into(holder.imageView);
}
}
else{
holder.imageButton.setImageResource(R.drawable.ic_add_black_24dp);
}
现在它已进入第一个if条件，您在检查其值之前将上传值设置为true。这将再次重新开始真实。因此，它使用相同的数据填充所有视图。
<强>解决方案
将以下方法更改为：
public void setImagePath(String path,int position){ //GETTING IMAGE HERE FROM ONACTIVITYRESULT TO THIS ADAPTER
this.ImageData=path;
userGridList.get(position).setUpload(true);
Log.d(TAG,"Position of Grid "+position); //POSITION OF CLICKED ITEM
Log.d(TAG,"Set Image Path "+path); //IMAGE PATH OF SELECTED IMAGE
notifyDataSetChanged();
}
同时更改填充图像的条件检查：
if (userGridWrapper.isUpload()){
holder.imageButton.setImageResource(R.drawable.ic_clear_black_24dp);
Picasso.with(context).load(ImageData)
.into(holder.imageView);
}
else{
holder.imageButton.setImageResource(R.drawable.ic_add_black_24dp);
}
答案 1 :(得分：0)
问题是你只有一个路径作为一个字段。您使用this.ImageData=path;分配新值。致电notifyDataSetChanged();后，您的适配器将刷新其数据，并为每个可见项目调用onBindViewHolder()。然后它将为每个调用加载ImageData路径的新图像。
您需要的是路径列表。您还应该检查是否已经加载了图像。如果它是相同的图像，您将不必再次加载它。也许你可以为此实现一个小缓存。