1
I have a fragment that has a listview inside it and inside lisview has a button.
The button has to delete the listview item
I have already made a method within onactivitycreated, but gives error "Java lang null Pointer"
Fragment code
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
minha_view = inflater.inflate(R.layout.lista_notificacoes, container, false);
return minha_view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
recupera_tarefa();
botao_deletar = (ImageView) getView().findViewById(R.id.botao_deletar);
botao_deletar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getContext(),"teste de mensagem",Toast.LENGTH_SHORT).show();
}
});
}
layout code - list notifications.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#000000"
android:dividerHeight="2dp"
android:id="@+id/list_notify"
>
</ListView>
</FrameLayout
code of Listview items being added at runtime after the user registers an item.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/numero_notificacao"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_gravity="center"
android:background="@drawable/circle"
android:fontFamily="sans-serif"
android:gravity="center"
android:textColor="@android:color/white"
android:textSize="16sp"
android:text="texto"
android:layout_marginTop="4dp"
android:layout_marginLeft="4dp"
android:layout_marginBottom="4dp"
/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/texto_notificacao_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:textColor="#000000"
android:text="fedsfse"
android:maxLines="1"
android:ellipsize="end"
android:layout_marginTop="8dp"
android:layout_marginLeft="8dp"/>
<TextView
android:id="@+id/texto_hora_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:text="TextVie"
android:layout_marginLeft="8dp" />
</LinearLayout>
<ImageView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/delete"
android:id="@+id/botao_deletar"
android:layout_gravity="center"
android:layout_marginRight="8dp"/>
</LinearLayout>