项目添加到ListView控件 - 机器人 [英] Add Items to ListView - Android
问题描述
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<字符串> {
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<字符串> 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
< RelativeLayout的的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools
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_horizontal_margin
机器人:paddingRight =@扪/ activity_horizontal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
工具:上下文=MainActivity $ DummySectionFragment。>
<的ListView
机器人:ID =@ + ID / unitListView
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT>
< / ListView控件>
<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/>
< / RelativeLayout的>
Row.xml
< XML版本=1.0编码=UTF-8&GT?;
< RelativeLayout的的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent>
<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/>
<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>
<不是requestFocus />
< /的EditText>
<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/>
<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/>
< / RelativeLayout的>
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< 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<字符串> myStringArray1 =新的ArrayList<字符串>(); //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<字符串>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<字符串>(getActivity(),R.layout.row,R.id.textView1,myStringArray2);
unitListView.setAdapter(适配器);
打破;
案例3:
适配器=新的ArrayAdapter<字符串>(getActivity(),R.layout.row,R.id.textView1,myStringArray3);
unitListView.setAdapter(适配器);
打破;
壳体4:
适配器=新的ArrayAdapter<字符串>(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<>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<字符串> myStringArray1 =新的ArrayList<字符串>();
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();
}
};
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