So this has been bugging me for like a week and I haven't found the answer yet.
Basically I have this MainActivity which contains the main code and a fragment that work for the listview.
MainActivity.java
public class MainActivity extends AppCompatActivity {
private Handler handler = new Handler();
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private Button bNext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new RoomServer(), "Room Server");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
RoomServer.java
public class RoomServer extends ListFragment implements OnItemClickListener{
public RoomServer() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_rs, container, false);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
getListView().setChoiceMode(getListView().CHOICE_MODE_MULTIPLE);
getListView().setTextFilterEnabled(true);
ArrayAdapter adapter = ArrayAdapter.createFromResource(getActivity(), R.array.rs_list, android.R.layout.simple_list_item_checked);
setListAdapter(adapter);
getListView().setOnItemClickListener(this);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getActivity(), "Item: " + position, Toast.LENGTH_SHORT).show();
}
}
Fragment_rs.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragments.RoomServer">
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
<TextView
android:id="@android:id/empty"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</TextView>
<Button
android:id="@+id/bNext_rs"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/next"
android:layout_marginRight="39dp"
android:layout_marginEnd="39dp"
android:layout_marginBottom="60dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>
activity_main.xml
<android.support.design.widget.CoordinatorLayout 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">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" >
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="scrollable"
app:tabGravity="fill"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
The items of listview r declared inside strings.XML
As u can see I'm using CHOICE_MODE_MULTIPLE to create checkbox in the listview. And now I'm stuck at how to get the value of this checkbox. I'm planning to use Volley to send value to my database by a button click. Most of the answer I saw was using the isChecked and stuff but I dont really understand how to implement it in my array adapter.
You can either implement a custom array adapter yourself, or use this method in the ListView
class to get a SparseBooleanArray
of the indexes of the selected items:
//Submit button example
submitButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//Get base list
String[] items = getActivity().getResources().getStringArray(R.array.rs_list);
//Get selected items & set intent args
SparseBooleanArray selectedItems = getListView().getCheckedItemPositions();
ArrayList<String> argList = new ArrayList<>();
for (int i = 0; i < selectedItems.size(); i++) {
argList.add(items[selectedItems.keyAt(i)]);
}
//Start activity
Intent intent = new Intent();
intent.putStringArrayListExtra("SelectedItems", argList);
getActivity().startActivity(intent);
}
});
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