英文:
Not being able to place an onClickListener on the Grid Items provided by a custom BaseAdapter
问题
I currently have a grid view using a base adapter inside a fragment, and I am trying to transfer to a different fragment when one of the items is clicked but none of the solutions I found on stack overflow has worked. I might miss something.
Adapter
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.licenta.joberfrontend.R;
import com.licenta.joberfrontend.rest.backend_entieties.Category;
import java.util.ArrayList;
import java.util.List;
public class CategoriesAdapter extends BaseAdapter {
public class ViewHolder {
TextView textName;
ImageView imageView;
}
private ArrayList<Category> categoryList;
public Context context;
public CategoriesAdapter(List<Category> apps, Context context) {
this.context = context;
this.categoryList = (ArrayList<Category>) apps;
}
@Override
public int getCount() {
return categoryList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View view, ViewGroup parent) // inflating the layout and initializing widgets
{
ViewHolder viewHolder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.category_list_content, parent, false);
viewHolder = new ViewHolder();
viewHolder.textName = view.findViewById(R.id.textName);
viewHolder.imageView = view.findViewById(R.id.iconView);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
// here we are setting up the names and images
viewHolder.textName.setText(categoryList.get(position).getName());
viewHolder.imageView.setImageResource(this.context.getResources().getIdentifier(categoryList.get(position).getCategoryIconId(), "mipmap", this.context.getPackageName()));
return view;
}
}
Fragment's OnCreate
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final LocalStorageSaver localStorageSaver = new LocalStorageSaver(Objects.requireNonNull(getContext()));
final ToastShower toastShower = new ToastShower();
//REST services creation
final RetrofitCreator retrofitCreator = new RetrofitCreator();
final Retrofit retrofit = retrofitCreator.getRetrofit();
final CategoryService categoryService = retrofit.create(CategoryService.class);
final Call<List<Category>> getCategoriesRequest = categoryService.getAllCategoriesAndTheirJobs(localStorageSaver.getValueFromStorage(Constants.TOKEN));
getCategoriesRequest.enqueue(
new Callback<List<Category>>() {
@Override
public void onResponse(Call<List<Category>> call, Response<List<Category>> response) {
toastShower.showToast("Categories succesfully retrieved from backend.", getContext());
final GridView gridView = Objects.requireNonNull(getView()).findViewById(R.id.gridViewNewContract);
gridView.setAdapter(new CategoriesAdapter(response.body(), getActivity()));
}
@Override
public void onFailure(Call<List<Category>> call, Throwable t) {
toastShower.showToast("There has been a problem with retrieving the categories data!", getContext());
}
}
);
}
Items inside the grid view
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:layout_width="100dp"
android:layout_height="100dp"
app:cardCornerRadius="15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginTop="15dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="15dp"
android:orientation="vertical">
<ImageView
android:id="@+id/iconView"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center_horizontal"
android:src="@mipmap/ic_list"
android:tint="@color/colorAccent" />
<TextView
android:id="@+id/textName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:fontFamily="sans-serif"
android:maxLength="12"
android:text="@string/appName"
android:textColor="@color/colorAccent"
android:textSize="13sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</RelativeLayout>
If you need any more information, I will gladly provide it. I can mention that I've tried placing listeners both in the adapter and in the fragment directly on the grid.
英文:
I currently have a grid view using a base adapter inside a fragment and I am trying to transfer to a different fragment when one of the items is clicked but none of the solutions I found on stack overflow has worked. I might miss something.
Adapter
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.licenta.joberfrontend.R;
import com.licenta.joberfrontend.rest.backend_entieties.Category;
import java.util.ArrayList;
import java.util.List;
public class CategoriesAdapter extends BaseAdapter {
public class ViewHolder {
TextView textName;
ImageView imageView;
}
private ArrayList<Category> categoryList;
public Context context;
public CategoriesAdapter(List<Category> apps, Context context) {
this.context = context;
this.categoryList = (ArrayList<Category>) apps;
}
@Override
public int getCount() {
return categoryList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View view, ViewGroup parent) // inflating the layout and initializing widgets
{
ViewHolder viewHolder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.category_list_content, parent, false);
viewHolder = new ViewHolder();
viewHolder.textName = view.findViewById(R.id.textName);
viewHolder.imageView = view.findViewById(R.id.iconView);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
// here we are setting up the names and images
viewHolder.textName.setText(categoryList.get(position).getName());
viewHolder.imageView.setImageResource(this.context.getResources().getIdentifier(categoryList.get(position).getCategoryIconId(), "mipmap", this.context.getPackageName()));
return view;
}
}
Fragment's OnCreate
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final LocalStorageSaver localStorageSaver = new LocalStorageSaver(Objects.requireNonNull(getContext()));
final ToastShower toastShower = new ToastShower();
//REST services creation
final RetrofitCreator retrofitCreator = new RetrofitCreator();
final Retrofit retrofit = retrofitCreator.getRetrofit();
final CategoryService categoryService = retrofit.create(CategoryService.class);
final Call<List<Category>> getCategoriesRequest = categoryService.getAllCategoriesAndTheirJobs(localStorageSaver.getValueFromStorage(Constants.TOKEN));
getCategoriesRequest.enqueue(
new Callback<List<Category>>() {
@Override
public void onResponse(Call<List<Category>> call, Response<List<Category>> response) {
toastShower.showToast("Categories succesfully retrieved from backend.", getContext());
final GridView gridView = Objects.requireNonNull(getView()).findViewById(R.id.gridViewNewContract);
gridView.setAdapter(new CategoriesAdapter(response.body(), getActivity()));
}
@Override
public void onFailure(Call<List<Category>> call, Throwable t) {
toastShower.showToast("There has been a problem with retrieving the categories data!", getContext());
}
}
);
}
Items inside the grid view
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:layout_width="100dp"
android:layout_height="100dp"
app:cardCornerRadius="15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginTop="15dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="15dp"
android:orientation="vertical">
<ImageView
android:id="@+id/iconView"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center_horizontal"
android:src="@mipmap/ic_list"
android:tint="@color/colorAccent" />
<TextView
android:id="@+id/textName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:fontFamily="sans-serif"
android:maxLength="12"
android:text="@string/appName"
android:textColor="@color/colorAccent"
android:textSize="13sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</RelativeLayout>
If you need any more information I will gladly provided.
I can mention that I've tried placing listeners both in the adapter and in the fragment directly on the grid.
答案1
得分: 0
viewHolder.imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//进行操作
}
});
英文:
please try this
viewHolder.imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//do stuff
}
});
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