I have a problem, been searching since yesterday, I post the code:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_wishes);
mListView = (ListView) findViewById(R.id.listId);
refreshData();
}
private void refreshData() {
wishes.clear();
dbHandler = new DatabaseHandler(getApplicationContext());
ArrayList<MyWishes> wishesFromDB = dbHandler.getWishes();
for (int i = 0; i < wishesFromDB.size(); i++){
String title = wishesFromDB.get(i).getTitle();
String content = wishesFromDB.get(i).getContent();
String date = wishesFromDB.get(i).getRecordDate();
MyWishes myWishes = new MyWishes();
myWishes.setTitle(title);
myWishes.setContent(content);
myWishes.setRecordDate(date);
wishes.add(myWishes);
}
dbHandler.close();
mWishAdapter = new WishAdapter(showWishesActivity.this, R.layout.list_row, wishes);
mListView.setAdapter(mWishAdapter);
mWishAdapter.notifyDataSetChanged();
}
public class WishAdapter extends ArrayAdapter<MyWishes>{
Activity activity;
MyWishes wish;
ArrayList<MyWishes> mData = new ArrayList<>();
int layoutRessource;
public WishAdapter(Activity act, int resource, ArrayList<MyWishes> data) {
super(act, resource, data);
activity = act;
layoutRessource = resource;
mData = data;
notifyDataSetChanged();
}
@Override
public int getCount() {
return mData.size();
}
@Override
public int getPosition(MyWishes item) {
return super.getPosition(item);
}
@Nullable
@Override
public MyWishes getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return super.getItemId(position);
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if (row == null || (row.getTag()) == null){
LayoutInflater inflater = LayoutInflater.from(activity);
row = inflater.inflate(layoutRessource, null);
holder = new ViewHolder();
holder.mTitle = (TextView) findViewById(R.id.titre);
holder.mDate = (TextView) findViewById(R.id.date);
row.setTag(holder);
}else {
holder = (ViewHolder) row.getTag();
}
holder.mMyWishes = getItem(position);
holder.mTitle.setText(holder.mMyWishes.getTitle());
holder.mDate.setText(holder.mMyWishes.getRecordDate());
return row;
}
class ViewHolder{
MyWishes mMyWishes;
TextView mTitle;
TextView mContent;
TextView mDate;
TextView mId;
}
}
on the getView method, I get a NullPointerException on holder.setText.`
I post the xml too:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="12dp"
android:background="#90f96666">
<ImageView
android:id="@+id/imageViewDatabaseId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@android:drawable/ic_menu_agenda"/>
<TextView
android:id="@+id/titre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="The title"
android:textStyle="bold"
android:layout_toRightOf="@+id/imageViewDatabaseId"
android:layout_marginLeft="20dp"/>
<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="The detail"
android:layout_toRightOf="@+id/imageViewDatabaseId"
android:layout_below="@+id/titleId"
android:layout_marginTop="3dp"
android:layout_marginLeft="40dp"
android:textStyle="italic"/>
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at wishlist.yassine.com.mywishlist.showWishesActivity$WishAdapter.getView(showWishesActivity.java:133)
I dont understand the problem, anyone can help me please, thank you for your time.
