これはAndroidでの初めての経験です。 ListViewにアイテムを追加しようとしています。私はタブを使用しますが、アイテムが追加されたことを確認する唯一の方法は、タブを変更してから最初のタブに戻ることです。
私はあちこち探しましたが、いつも見つけました
adapter.notifyDataSetChanged();
しかし、私にはうまくいきません。
先ほど言ったように、固定タブ+スワイプでプロジェクトを作成しました。行にEditText、Spinner、およびButtonがあるリストビューが必要です。タブに使用されるフラグメントの下部に、ImageButtonがあります。クリックして、新しい行を作成します。
私のカスタムアダプタ:
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>
主な活動...
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
}
};
}
}
現在、最初のタブでのみ作業していることに注意してください...
何が間違っていますか? :)
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);
このようにしてみてください
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();
}
};
これを試してみてください
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();
}
}