这是我与Android第一次经历。我试图将项目添加到我的ListView。 我使用的标签，而只有这样，才能看到加入该项目是改变选项卡，然后再回到第一个标签。

我，四处搜寻，我总是发现

  adapter.notifyDataSetChanged（）;
 

但对我不起作用。

我创建的项目，正如我所说的，固定选项卡+刷卡。 我只是想有列表视图该行有一个EditText，一个微调和一个按钮。 在使用该选项卡的片段的底部，我有一个ImageButton的。我想一下就可以了，并有一个新行。

我的自定义适配器：

 包com.andreapivetta.uconverter;

进口的java.util.ArrayList;

进口android.content.Context;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.ArrayAdapter;

公共类CustomAdapter扩展ArrayAdapter＆LT;字符串＆GT; {
私人最终上下文的背景下;
私人最终诠释RESOURCEID;

    公共CustomAdapter（上下文的背景下，INT资源的ArrayList＆LT;字符串＆GT; BAH）{
        超（背景下，资源，呸）;

        this.context =背景;
        this.resourceID =资源;
    }

    @覆盖
    公共查看getView（INT位置，查看convertView，ViewGroup中父）{
        LayoutInflater充气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        查看rowView = inflater.inflate（RESOURCEID，父母，假）;

        返回rowView;
    }
}
 

fragment_main_dummy.xml

 ＆LT; RelativeLayout的的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
的xmlns：工具=htt​​p://schemas.android.com/tool​​s
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：paddingBottom会=@扪/ activity_vertical_margin
机器人：以下属性来=@扪/ activity_horizo​​ntal_margin
机器人：paddingRight =@扪/ activity_horizo​​ntal_margin
机器人：paddingTop =@扪/ activity_vertical_margin
工具：上下文=MainActivity $ DummySectionFragment。＆GT;

＆LT;的ListView
    机器人：ID =@ + ID / unitListView
    机器人：layout_width =match_parent
    机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; / ListView控件＆GT;

＆LT;的ImageButton
    机器人：ID =@ + ID / moreImageButton
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT

    机器人：layout_alignParentBottom =真
    机器人：layout_alignParentRight =真

    机器人：contentDescription =@字符串/ image_button_delete
    机器人：SRC =@机器人：可绘制/ ic_input_add/＆GT;

＆LT; / RelativeLayout的＆GT;
 

Row.xml

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; RelativeLayout的的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
            机器人：layout_width =match_parent
            机器人：layout_height =match_parent＆GT;

＆LT;的TextView
    机器人：ID =@ + ID / textView1
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_alignParentLeft =真
    机器人：layout_alignParentTop =真/＆GT;

＆LT;的EditText
    机器人：ID =@ + ID / unitEditText
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_alignParentLeft =真
    机器人：layout_below =@ + ID / textView1
    机器人：EMS =10
    机器人：inputType =numberDecimal＆GT;

    ＆LT;不是requestFocus /＆GT;
＆LT; /的EditText＆GT;

＆LT;微调
    机器人：ID =@ + ID / unitSpinner
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_alignBottom =@ + ID / imageButton1
    机器人：layout_marginBottom =15dp
    机器人：layout_toRightOf =@ + ID / unitEditText/＆GT;

＆LT;的ImageButton
    机器人：ID =@ + ID / imageButton1
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_alignBottom =@ + ID / unitEditText
    机器人：layout_alignParentRight =真

    机器人：的onClick =为removeItem

    机器人：contentDescription =@字符串/ image_button_delete
    机器人：SRC =@机器人：可绘制/ ic_menu_delete/＆GT;

＆LT; / RelativeLayout的＆GT;
 

MainActivity ...

 公共类MainActivity扩展FragmentActivity工具
    ActionBar.TabListener {

/ **
 *在{@link android.support.v4.view.PagerAdapter}，将提供
 *对于每个部分的片段。我们使用
 * {@link android.support.v4.app.FragmentPagerAdapter}衍生物，它
 *将让每一个加载的片段记忆。如果这成为过记忆
 *密集，它可能是最好切换到
 * {@link android.support.v4.app.FragmentStatePagerAdapter}。
 * /
SectionsPagerAdapter mSectionsPagerAdapter;

/ **
 *在{@link ViewPager}将承载部分内容。
 * /
ViewPager mViewPager;


@覆盖
保护无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;

    //设置操作栏。
    最后的动作条动作条= getActionBar（）;
    actionBar.setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）;

    //创建将返回一个片段为三个的适配器
    //应用程序的主要部分。
    mSectionsPagerAdapter =新SectionsPagerAdapter（getSupportFragmentManager（））;

    //设置的ViewPager与部分适配器。
    mViewPager =（ViewPager）findViewById（R.id.pager）;
    mViewPager.setAdapter（mSectionsPagerAdapter）;

    //当不同部分之间的刷卡，选择相应的
    //标签。我们也可以使用ActionBar.Tab＃选择（）要做到这一点，如果我们有
    //引用的标签。
    mViewPager
            .setOnPageChangeListener（新ViewPager.SimpleOnPageChangeListener（）{
                @覆盖
                公共无效onPageSelected（INT位置）{
                    actionBar.setSelectedNavigationItem（位置）;
                }
            }）;

    //对于每个应用程序的章节中，添加一个标签，操作栏。
    的for（int i = 0; I＆LT; mSectionsPagerAdapter.getCount（）;我++）{
        //创建与对应于由所定义的页标题文本标签
        //适配器。同时，指定此活动的对象，它实现
        //该TabListener界面，回调（监听程序）进行时
        //这个选项卡中选择。
        actionBar.addTab（actionBar.newTab（）
                .setText（mSectionsPagerAdapter.getPageTitle（I））
                .setTabListener（本））;
    }
}

@覆盖
公共布尔onCreateOptionsMenu（功能菜单）{
    //充气菜单;这增加了项目操作栏，如果它是present。
    。getMenuInflater（）膨胀（R.menu.main，菜单）;
    返回true;
}

@覆盖
公共无效onTabSelected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
    //当选择给定的标签，切换到对应页面
    //该ViewPager。
    mViewPager.setCurrentItem（tab.getPosition（））;
}

@覆盖
公共无效onTabUnselected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
}

@覆盖
公共无效onTabReselected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
}

/ **
 * A {@link FragmentPagerAdapter}返回对应的片段
 *章节/标签/页之一。
 * /
公共类SectionsPagerAdapter扩展FragmentPagerAdapter {

    公共SectionsPagerAdapter（FragmentManager FM）{
        超（FM）;
    }

    @覆盖
    公共片段的getItem（INT位置）{
        //的getItem被称为实例化片段给定的页面。
        //返回一个DummySectionFragment（定义为静态内部类
        下图）与页面数量作为其唯一的参数//。
        片段片段=新DummySectionFragment（）;
        捆绑的args =新包（）;
        args.putInt（DummySectionFragment.ARG_SECTION_NUMBER，位置+ 1）;
        fragment.setArguments（参数）;
        返回片段;
    }

    @覆盖
    公众诠释getCount将（）{
        //显示4总页数。
        返回4;
    }

    @覆盖
    公共CharSequence的getPageTitle（INT位置）{
        区域设置L = Locale.getDefault（）;
        开关（位置）{
        情况下0：
            返回的getString（R.string.title_section1）.toUpperCase（升）;
        情况1：
            返回的getString（R.string.title_section2）.toUpperCase（升）;
        案例2：
            返回的getString（R.string.title_section3）.toUpperCase（升）;
        案例3：
            返回的getString（R.string.title_section4）.toUpperCase（升）;
        }
        返回null;
    }
}

/ **
 *一个虚拟片段重新presenting应用程序的一部分，但只是
 *显示虚拟文本。
 * /
公共静态类DummySectionFragment扩展片段{
    / **
     *片段参数重新presenting本章节号
     * 分段。
     * /
    ArrayList的＆LT;字符串＆GT; myStringArray1 =新的ArrayList＆LT;字符串＆GT;（）; //新的String [] {Egzo，例如，Egzona};
    的String [] myStringArray2 =新的String [] {AAA，BBB，CCC};
    的String [] myStringArray3 =新的String [] {DDD，EEEE};
    的String [] myStringArray4 =新的String [] {CIA，词，侨};
    公共静态ArrayAdapter＆LT;字符串＆GT;适配器;

    公共静态最后弦乐ARG_SECTION_NUMBER =section_number标;

    公共DummySectionFragment（）{
    }

    @覆盖
    公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
        查看rootView = inflater.inflate（R.layout.fragment_main_dummy，集装箱，假）;
        // TextView的dummyTextView =（TextView中）rootView.findViewById（R.id.section_label）;
        //dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER）））;

        // 列表显示
        ListView控件unitListView =（ListView控件）rootView.findViewById（R.id.unitListView）;

        开关（getArguments（）。调用getInt（ARG_SECTION_NUMBER））{
        情况1：
            myStringArray1.add（MMM）;

            适配器=新CustomAdapter（getActivity（），R.layout.row，myStringArray1）;
            unitListView.setAdapter（适配器）;
            打破;
        案例2：
            适配器=新的ArrayAdapter＆LT;字符串＆GT;（getActivity（），R.layout.row，R.id.textView1，myStringArray2）;
            unitListView.setAdapter（适配器）;
            打破;
        案例3：
            适配器=新的ArrayAdapter＆LT;字符串＆GT;（getActivity（），R.layout.row，R.id.textView1，myStringArray3）;
            unitListView.setAdapter（适配器）;
            打破;
        壳体4：
            适配器=新的ArrayAdapter＆LT;字符串＆GT;（getActivity（），R.layout.row，R.id.textView1，myStringArray4）;
            unitListView.setAdapter（适配器）;
            打破;
        }
        unitListView.setOnItemClickListener（listViewOnClickListener）;

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


        返回rootView;
    }

    公共OnClickListener moreListener =新OnClickListener（）{

        @覆盖
        公共无效的onClick（视图v）{
            // TODO自动生成方法存根

            myStringArray1.add（安德烈）;
            adapter.clear（）;
            adapter.addAll（myStringArray1）;
            adapter.notifyDataSetChanged（）;
        }

    };

    公共OnItemClickListener listViewOnClickListener =新OnItemClickListener（）{

        @覆盖
        公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，查看ARG1，INT ARG2，
                长ARG3）{
            // TODO自动生成方法存根

        }

    };
}

}
 

请注意，我只涉及到了第一个选项卡，现在...

我是什么做错了吗？ ：）

 的ListView myListView =（ListView控件）rootView.findViewById（R.id.myListView）;
ArrayList的＆LT;字符串＆GT; myStringArray1 =新的ArrayList＆LT;字符串＆GT;（）;
myStringArray1.add（东西）;
适配器=新CustomAdapter（getActivity（），R.layout.row，myStringArray1）;
myListView.setAdapter（适配器）;
 

试试这样

 公共OnClickListener moreListener =新OnClickListener（）{

    @覆盖
    公共无效的onClick（视图v）{
        适配器= NULL;
        myStringArray1.add（安德烈）;
        适配器=新CustomAdapter（getActivity（），R.layout.row，myStringArray1）;
        myListView.setAdapter（适配器）;
        adapter.notifyDataSetChanged（）;
    }
};
 

This is my first experience with android. I'm trying to add items to my ListView. I use Tabs, and the only way to see that the item was added is to change tab and then come back to the first tab.

I searched around, and I've always found

adapter.notifyDataSetChanged();

but doesn't work for me.

I have created the project with, as I said, Fixed Tabs + Swipe. I simply want to have listviews which rows have an EditText, a Spinner and a Button. On the bottom of the Fragment used for the tab, I have an ImageButton. I want to click on it and have a new Row.

my custom Adapter:

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>

MainActivity...

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

        }

    };
}

}

Note that I'm working only with the first tab right now...

What am I doing wrong? :)

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);

Try it like this

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();
    }       
};