的Android如何把列表视图鉴于寻呼机片段 [英] Android how to put listview in view pager fragments
问题描述
我已经实现了使用viewpager通过在Eclipse中使用该模板swipey标签应用
现在我得到延伸FragmentActivity这样一个活动。
包com.example.abcd2; 进口java.util.Locale中; 进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v4.app.FragmentActivity;
进口android.support.v4.app.FragmentManager;
进口android.support.v4.app.FragmentPagerAdapter;
进口android.support.v4.app.NavUtils;
进口android.support.v4.view.ViewPager;
进口android.view.Gravity;
进口android.view.LayoutInflater;
进口android.view.Menu;
进口android.view.MenuItem;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.TextView; 公共类MainActivity扩展FragmentActivity { / **
*本{@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,其
*将让每一个片段加载在内存中。如果这成为太内存
*密集,它可能是最好切换到
* {@link android.support.v4.app.FragmentStatePagerAdapter}。
* /
SectionsPagerAdapter mSectionsPagerAdapter; / **
*本{@link ViewPager}将承载部分内容。
* /
ViewPager mViewPager; @覆盖
保护无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main); //创建将返回一个片段为三个的适配器
//应用的主要部分。
mSectionsPagerAdapter =新SectionsPagerAdapter(
getSupportFragmentManager()); //设置的ViewPager与部分适配器。
mViewPager =(ViewPager)findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter); } @覆盖
公共布尔onCreateOptionsMenu(菜单菜单){
//充气菜单;如果是present这增加了项目操作栏。
。getMenuInflater()膨胀(R.menu.main,菜单);
返回true;
} / **
* A {@link FragmentPagerAdapter}返回对应片段
*章节/标签/页面。
* /
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被称为实例化片段为给定的页面。
//返回一个DummySectionFragment(定义为静态内部类
//下面)附页码为它的独立参数。
如果(位置== 0)
{
片段frag2 =新ShowFrag2();
返回frag2;}
其他
{
片段片段=新DummySectionFragment();
捆绑ARGS =新包();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER,位置+ 1);
fragment.setArguments(参数);
返回片段;}
} @覆盖
公众诠释的getCount(){
//显示3总页数。
返回3;
} @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);
}
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本节号
*片段。
* /
公共静态最后弦乐ARG_SECTION_NUMBER =SECTION_NUMBER; 公共DummySectionFragment(){
} @覆盖
公共查看onCreateView(LayoutInflater充气器,容器的ViewGroup,
捆绑savedInstanceState){
查看rootView = inflater.inflate(R.layout.fragment_main_dummy,
集装箱,FALSE);
TextView的dummyTextView =(TextView中)rootView
.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments()调用getInt(
ARG_SECTION_NUMBER)));
返回rootView;
}
} }
在此,打造一个选项卡中一个新的片段,我使用的if-else基于的getItem()方法的位置,如图所示。
片段showfrag2是这样
进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;公共类ShowFrag2扩展片段{
@覆盖
公共查看onCreateView(LayoutInflater充气器,容器的ViewGroup,
捆绑savedInstanceState){
//充气的布局该片段
返回inflater.inflate(R.layout.frag2,集装箱,FALSE);
}
}
我的问题是,如何在这个片段中的一个创建列表视图。我想只有以这种方式使用一个简单的列表视图
LevelAdapter适配器=新LevelAdapter(这一点,
R.layout.list_item,weather_data);
ListView1的=(的ListView)findViewById(R.id.listView1); listView1.setAdapter(适配器);
不过,这已经在活动完成。我如何使用像这样的片段以上。另外,我无法使用ListFragment作为getView()方法返回一个片段。
请帮忙关于如何实现这一点。
谢谢
编辑:
这里是我的适配器code:
包com.example.abcd3;进口android.app.Activity;
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;
进口android.widget.ImageView;
进口android.widget.TextView;公共类LevelAdapter扩展ArrayAdapter<平> { 静态上下文的背景下;
静态INT layoutResourceId;
静态层面的数据[] = NULL; / *公共LevelAdapter(上下文的背景下,INT layoutResourceId,级别[]数据){
超级(上下文,layoutResourceId,数据);
this.layoutResourceId = layoutResourceId;
this.context =背景;
this.data =数据;
} * / 公共LevelAdapter(ShowFrag1 showFrag1,INT的listItem,
级别[] weather_data){
超级(上下文,layoutResourceId,数据);
this.layoutResourceId = layoutResourceId;
this.context =背景;
this.data =数据; // TODO自动生成构造函数存根
} 众长getItemId(INT位置){
返回的位置;
} @覆盖
公共查看getView(INT位置,查看convertView,父母的ViewGroup){
查看排= convertView;
WeatherHolder支架=无效; 如果(行== NULL)
{
LayoutInflater充气=((活动)上下文).getLayoutInflater();
行= inflater.inflate(layoutResourceId,父母,假); 持有人=新WeatherHolder();
holder.imgIcon =(ImageView的)row.findViewById(R.id.imgIcon);
holder.txtTitle =(TextView中)row.findViewById(R.id.txtTitle);
// holder.imgIcon2 =(ImageView的)row.findViewById(R.id.imgIcon2);
row.setTag(保持器);
}
其他
{
支架=(WeatherHolder)row.getTag();
} 天气级数据= [位置]
holder.txtTitle.setText(weather.title);
holder.imgIcon.setImageResource(weather.icon); 返回行;
} 静态类WeatherHolder
{
ImageView的imgIcon;
TextView的txtTitle;
// ImageView的imgIcon2;
}}
请确保您有的ListView
在 R.layout.frag2 <定义/ code>并设置
>。 (类似其活动所做的那样) ShowFrag2
onCreateView
公开查看onCreateView(LayoutInflater充气器,容器的ViewGroup,
捆绑savedInstanceState){ 查看fragmentLayout = inflater.inflate(R.layout.frag2,集装箱,FALSE); ListView控件ListView1的= fragmentLayout.findViewById(R.id.mylistview); LevelAdapter适配器=新LevelAdapter(这一点,R.layout.list_item,weather_data);
ListView1的=(的ListView)findViewById(R.id.listView1);
listView1.setAdapter(适配器); 返回伏;}
I have implemented a swipey tabs app using viewpager by using this template in Eclipse
Now i get an activity which extends FragmentActivity like this
package com.example.abcd2;
import java.util.Locale;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends FragmentActivity {
/**
* 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);
// 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);
}
@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;
}
/**
* 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.
if(position==0)
{
Fragment frag2=new ShowFrag2();
return frag2;}
else
{
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 3 total pages.
return 3;
}
@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);
}
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.
*/
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)));
return rootView;
}
}
}
In this, to create a new fragment in one of the tabs, i use if-else based on position in the getItem() method as shown. The fragment showfrag2 is this
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class ShowFrag2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.frag2, container, false);
}
}
My question is, how do i create a listview in one of this fragments . I would like to use a simple listview only in this manner
LevelAdapter adapter = new LevelAdapter(this,
R.layout.list_item, weather_data);
listView1 = (ListView)findViewById(R.id.listView1);
listView1.setAdapter(adapter);
But this has been done in an activity. How can i use something like this in the fragment above. Also, i cannot use ListFragment as the getView() method is returning a fragment. Please help regarding how to implement this. Thanks EDIT: Here is my adapter code :
package com.example.abcd3;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class LevelAdapter extends ArrayAdapter<Level> {
static Context context;
static int layoutResourceId;
static Level data[] = null;
/* public LevelAdapter(Context context, int layoutResourceId, Level[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}*/
public LevelAdapter(ShowFrag1 showFrag1, int listItem,
Level[] weather_data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
// TODO Auto-generated constructor stub
}
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
WeatherHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new WeatherHolder();
holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
// holder.imgIcon2=(ImageView)row.findViewById(R.id.imgIcon2);
row.setTag(holder);
}
else
{
holder = (WeatherHolder)row.getTag();
}
Level weather = data[position];
holder.txtTitle.setText(weather.title);
holder.imgIcon.setImageResource(weather.icon);
return row;
}
static class WeatherHolder
{
ImageView imgIcon;
TextView txtTitle;
// ImageView imgIcon2;
}
}
Make sure you have ListView
defined in R.layout.frag2
and set the adapter to listview in onCreateView
of ShowFrag2
. (Similar to the way its done in activity)
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fragmentLayout = inflater.inflate(R.layout.frag2, container, false);
ListView listView1 = fragmentLayout.findViewById(R.id.mylistview);
LevelAdapter adapter = new LevelAdapter(this, R.layout.list_item, weather_data);
listView1 = (ListView)findViewById(R.id.listView1);
listView1.setAdapter(adapter);
return v;
}
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