I am trying to implement a simple ListView into a Fragment. I have seen many tutorials on how to do so but for some reason my adaptation does not work and I cannot figure out why.
the goal: to have a fragment with one listview.
I understand there are many questions about this and I have seen most of them but mine does not work and I have tried many variations with no success.
From what I have gathered ListFragment and AppCompatActivity are the most appropiate:
//code for fragment.
package com.example.student.hwapp;
import android.support.v4.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
public class TasksFragment extends ListFragment {
public TasksFragment(){}
public String[] list = {"1","2","3","4","5","6"};
ListAdapter theAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView = inflater.inflate(R.layout.tasks_fragment,container,false);
theAdapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, list);
setListAdapter(theAdapter);
return rootView;
}
public static TasksFragment newInstance() {
TasksFragment fragment = new TasksFragment();
return fragment;
}
}
the XML for tasks_fragment (as you can see the list id is list) :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent" android:layout_height="match_parent">
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/list"
tools:listitem="@android:layout/simple_list_item_2"
android:choiceMode="multipleChoice"
android:footerDividersEnabled="false"
android:clickable="false" />
</RelativeLayout>
and finally the Activity that holds the fragment:
package com.example.student.hwapp;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainMenu extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch(position){
case 0:
return TasksFragment.newInstance();
case 1:
return ClassFragment.newInstance();
}
return null;
}
@Override
public int getCount() {
// Show 2 total pages.
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
}
return null;
}
}
When I test the TasksFragment as a normal activity, it actually works but when I make it a fragment it doesn't.
Thank you for your help, sorry for the very specific and repetitive question but I really could not find a solution, I'm probably missing something very simple.
EDIT: 14203/com.example.student.hwapp E/AndroidRuntime: FATAL EXCEPTION: main java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
But I DO have a ListView and its id IS list as I showed in the code.
