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Ajouter des éléments à ListView - Android

C'est ma première expérience avec Android. J'essaie d'ajouter des éléments à mon ListView. J'utilise des onglets, et la seule façon de voir que l'élément a été ajouté est de changer d'onglet, puis de revenir au premier onglet.

J'ai cherché autour, et j'ai toujours trouvé

adapter.notifyDataSetChanged();

mais ne fonctionne pas pour moi.

J'ai créé le projet avec, comme je l'ai dit, des onglets fixes + glisser. Je veux simplement avoir des listviews dont les lignes ont un EditText, un Spinner et un Button. Sur le bas du fragment utilisé pour l'onglet, j'ai un ImageButton. Je veux cliquer dessus et avoir une nouvelle rangée.

mon adaptateur personnalisé:

package com.andreapivetta.uconverter;

import Java.util.ArrayList;

import Android.content.Context;
import Android.view.LayoutInflater;
import Android.view.View;
import Android.view.ViewGroup;
import Android.widget.ArrayAdapter;

public class CustomAdapter extends ArrayAdapter<String> {
private final Context context;
private final int resourceID;

    public CustomAdapter(Context context, int resource, ArrayList<String> bah) {
        super(context, resource, bah);

        this.context = context;
        this.resourceID = resource;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(resourceID, parent, false);

        return rowView;
    }
}

fragment_main_dummy.xml

<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"
Android:paddingBottom="@dimen/activity_vertical_margin"
Android:paddingLeft="@dimen/activity_horizontal_margin"
Android:paddingRight="@dimen/activity_horizontal_margin"
Android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity$DummySectionFragment" >

<ListView
    Android:id="@+id/unitListView"
    Android:layout_width="match_parent"
    Android:layout_height="wrap_content" >
</ListView>

<ImageButton
    Android:id="@+id/moreImageButton"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"

    Android:layout_alignParentBottom="true"
    Android:layout_alignParentRight="true"

    Android:contentDescription="@string/image_button_delete"
    Android:src="@Android:drawable/ic_input_add" />

</RelativeLayout>

Row.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
            Android:layout_width="match_parent"
            Android:layout_height="match_parent">

<TextView
    Android:id="@+id/textView1"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_alignParentLeft="true"
    Android:layout_alignParentTop="true" />

<EditText
    Android:id="@+id/unitEditText"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_alignParentLeft="true"
    Android:layout_below="@+id/textView1"
    Android:ems="10"
    Android:inputType="numberDecimal" >

    <requestFocus />
</EditText>

<Spinner
    Android:id="@+id/unitSpinner"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_alignBottom="@+id/imageButton1"
    Android:layout_marginBottom="15dp"
    Android:layout_toRightOf="@+id/unitEditText" />

<ImageButton
    Android:id="@+id/imageButton1"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_alignBottom="@+id/unitEditText"
    Android:layout_alignParentRight="true"

    Android:onClick="removeItem"

    Android:contentDescription="@string/image_button_delete"
    Android:src="@Android:drawable/ic_menu_delete" />

</RelativeLayout>

Activité principale...

public class MainActivity extends FragmentActivity implements
    ActionBar.TabListener {

/**
 * The {@link Android.support.v4.view.PagerAdapter} that will provide
 * fragments for each of the sections. We use a
 * {@link Android.support.v4.app.FragmentPagerAdapter} derivative, which
 * will keep every loaded fragment in memory. If this becomes too memory
 * intensive, it may be best to switch to a
 * {@link Android.support.v4.app.FragmentStatePagerAdapter}.
 */
SectionsPagerAdapter mSectionsPagerAdapter;

/**
 * The {@link ViewPager} that will Host the section contents.
 */
ViewPager mViewPager;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Set up the action bar.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the app.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections, select the corresponding
    // tab. We can also use ActionBar.Tab#select() to do this if we have
    // a reference to the Tab.
    mViewPager
            .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                @Override
                public void onPageSelected(int position) {
                    actionBar.setSelectedNavigationItem(position);
                }
            });

    // For each of the sections in the app, add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
        // Create a tab with text corresponding to the page title defined by
        // the adapter. Also specify this Activity object, which implements
        // the TabListener interface, as the callback (listener) for when
        // this tab is selected.
        actionBar.addTab(actionBar.newTab()
                .setText(mSectionsPagerAdapter.getPageTitle(i))
                .setTabListener(this));
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public void onTabSelected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

@Override
public void onTabReselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a DummySectionFragment (defined as a static inner class
        // below) with the page number as its lone argument.
        Fragment fragment = new DummySectionFragment();
        Bundle args = new Bundle();
        args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public int getCount() {
        // Show 4 total pages.
        return 4;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        Locale l = Locale.getDefault();
        switch (position) {
        case 0:
            return getString(R.string.title_section1).toUpperCase(l);
        case 1:
            return getString(R.string.title_section2).toUpperCase(l);
        case 2:
            return getString(R.string.title_section3).toUpperCase(l);
        case 3:
            return getString(R.string.title_section4).toUpperCase(l);
        }
        return null;
    }
}

/**
 * A dummy fragment representing a section of the app, but that simply
 * displays dummy text.
 */
public static class DummySectionFragment extends Fragment {
    /**
     * The fragment argument representing the section number for this
     * fragment.
     */
    ArrayList<String> myStringArray1 =  new ArrayList<String>();//new String[]{"Egzo","Eg","Egzona"};
    String[] myStringArray2 = new String[]{"aaa","bbb","ccc"};
    String[] myStringArray3 = new String[]{"ddd","eeee"};
    String[] myStringArray4 = new String[]{"Cia","ci","Ciao"};
    public static ArrayAdapter<String> adapter;

    public static final String ARG_SECTION_NUMBER = "section_number";

    public DummySectionFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main_dummy,container, false);
        //TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
        //dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));

        // ListView
        ListView unitListView = (ListView) rootView.findViewById(R.id.unitListView);

        switch(getArguments().getInt(ARG_SECTION_NUMBER)) {
        case 1:
            myStringArray1.add("mmm");

            adapter = new CustomAdapter(getActivity(), R.layout.row, myStringArray1);
            unitListView.setAdapter(adapter);
            break;
        case 2:
            adapter = new ArrayAdapter<String>(getActivity(), R.layout.row, R.id.textView1, myStringArray2);
            unitListView.setAdapter(adapter);
            break;
        case 3:
            adapter = new ArrayAdapter<String>(getActivity(), R.layout.row, R.id.textView1, myStringArray3);
            unitListView.setAdapter(adapter);
            break;
        case 4:
            adapter = new ArrayAdapter<String>(getActivity(), R.layout.row, R.id.textView1, myStringArray4);
            unitListView.setAdapter(adapter);
            break;
        }
        unitListView.setOnItemClickListener(listViewOnClickListener);

        // ImageButton
        ImageButton moreImageButton = (ImageButton) rootView.findViewById(R.id.moreImageButton);
        moreImageButton.setOnClickListener(moreListener);


        return rootView;
    }

    public OnClickListener moreListener = new OnClickListener(){

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            myStringArray1.add("Andrea");
            adapter.clear();
            adapter.addAll(myStringArray1);
            adapter.notifyDataSetChanged();
        }

    };

    public OnItemClickListener listViewOnClickListener = new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub

        }

    };
}

}

Notez que je travaille uniquement avec le premier onglet en ce moment ...

Qu'est-ce que je fais mal? :)

javaandroidlistviewandroid-listviewfragment
17
andrew
ListView myListView = (ListView) rootView.findViewById(R.id.myListView);
ArrayList<String> myStringArray1 = new ArrayList<String>();
myStringArray1.add("something");
adapter = new CustomAdapter(getActivity(), R.layout.row, myStringArray1);
myListView.setAdapter(adapter);

Essayez comme ça

public OnClickListener moreListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
        adapter = null;
        myStringArray1.add("Andrea");
        adapter = new CustomAdapter(getActivity(), R.layout.row, myStringArray1);
        myListView.setAdapter(adapter);
        adapter.notifyDataSetChanged();
    }       
};
27
Amit Gupta

Essayez celui-ci ça va marcher

public class Third extends ListActivity {
private ArrayAdapter<String> adapter;
private List<String> liste;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_third);
     String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
                "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
                "Linux", "OS/2" };
     liste = new ArrayList<String>();
     Collections.addAll(liste, values);
     adapter = new ArrayAdapter<String>(this,
                Android.R.layout.simple_list_item_1, liste);
     setListAdapter(adapter);
}
 @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
     liste.add("Nokia");
     adapter.notifyDataSetChanged();
  }
}
3
Nadhir Titaouine