Android 如何在现有FragmentTabHost中添加滑动选项卡功能?
我正在我的应用程序中使用FragmentTabHost。它工作得非常好。我有两个选项卡,通过单击顶部打开。现在,我想在这里添加滑动功能。我想知道我是否应该为同样的问题使用不同的方法 主要活动:Android 如何在现有FragmentTabHost中添加滑动选项卡功能?,android,Android,我正在我的应用程序中使用FragmentTabHost。它工作得非常好。我有两个选项卡,通过单击顶部打开。现在,我想在这里添加滑动功能。我想知道我是否应该为同样的问题使用不同的方法 主要活动: package com.example.shiza.callhistorycontrol; import android.os.Bundle; import android.support.v4.app.FragmentTabHost; import android.support.v7.app.App
package com.example.shiza.callhistorycontrol;
import android.os.Bundle;
import android.support.v4.app.FragmentTabHost;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
public class MainActivity extends AppCompatActivity {
private FragmentTabHost mTabHost;
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Setting up a toolbar for the navigation purpose.
toolbar = (Toolbar)findViewById(R.id.app_bar);
toolbar.setTitle(" Call History Control");
toolbar.setLogo(R.mipmap.ic_launcher);
setSupportActionBar(toolbar);
// The fragments management is done here
mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("HOME"),
Home.class, null);
mTabHost.addTab(mTabHost.newTabSpec("contacts").setIndicator("ABOUT APP"),
Home.class, null);
}
}
主xml:
<android.support.v4.app.FragmentTabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- the app bar customized-->
<include
android:id="@+id/app_bar"
layout="@layout/app_bar"
/>
<TabWidget
android:id="@android:id/tabs"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="0"/>
<FrameLayout
android:id="@+id/realtabcontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</android.support.v4.app.FragmentTabHost>
请给我提供任何链接或建议?以下是我编写的一个示例,它使用滑动功能创建了
TabHost
:
首先是保存适配器的主片段,并添加带有(两个子片段)的选项卡。
public class MyFragment extends Fragment
{
private TabHost mTabHost;
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
public MyFragment() {
}
@Override
public void onCreate(Bundle instance)
{
super.onCreate(instance);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_main, container, false);
mTabHost = (TabHost) v.findViewById(android.R.id.tabhost);
mTabHost.setup();
mViewPager = (ViewPager) v.findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(getActivity(), mTabHost, mViewPager);
// Here we load the content for each tab.
mTabsAdapter.addTab(mTabHost.newTabSpec("simple").setIndicator("HOME"), FirstPage.class, null);
mTabsAdapter.addTab(mTabHost.newTabSpec("simple").setIndicator("HOME"), SecondPage.class, null);
return v;
}
@Override
public void onResume() {
super.onResume();
}
public static class TabsAdapter extends FragmentStatePagerAdapter implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener
{
private final Context mContext;
private final TabHost mTabHost;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo
{
private final String tag;
private final Class<?> clss;
private final Bundle args;
TabInfo(String _tag, Class<?> _class, Bundle _args)
{
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory
{
private final Context mContext;
public DummyTabFactory(Context context)
{
mContext = context;
}
public View createTabContent(String tag)
{
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public TabsAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager)
{
super(activity.getSupportFragmentManager());
mContext = activity;
mTabHost = tabHost;
mViewPager = pager;
mTabHost.setOnTabChangedListener(this);
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args)
{
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
mTabs.add(info);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
@Override
public int getCount()
{
return mTabs.size();
}
@Override
public Fragment getItem(int position)
{
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
public void onTabChanged(String tabId)
{
int position = mTabHost.getCurrentTab();
mViewPager.setCurrentItem(position);
}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
{
}
public void onPageSelected(int position)
{
// Unfortunately when TabHost changes the current tab, it kindly
// also takes care of putting focus on it when not in touch mode.
// The jerk.
// This hack tries to prevent this from pulling focus out of our
// ViewPager.
TabWidget widget = mTabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mTabHost.setCurrentTab(position);
widget.setDescendantFocusability(oldFocusability);
}
public void onPageScrollStateChanged(int state)
{
}
}
公共类MyFragment扩展了片段
{
私有TabHost-mTabHost;
私有视图寻呼机mViewPager;
私有TabsAdapter mtabsapter;
公共MyFragment(){
}
@凌驾
创建公共void(捆绑包实例)
{
super.onCreate(实例);
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图v=充气机。充气(右布局图。主容器碎片,假);
mTabHost=(TabHost)v.findviewbyd(android.R.id.TabHost);
mTabHost.setup();
mViewPager=(ViewPager)v.findViewById(R.id.pager);
MTABAdapter=new TabsAdapter(getActivity()、mTabHost、mViewPager);
//这里我们加载每个选项卡的内容。
mtabAdapter.addTab(mTabHost.newTabSpec(“简单”).setIndicator(“主页”),FirstPage.class,null);
mtabAdapter.addTab(mTabHost.newTabSpec(“简单”).setIndicator(“主页”),SecondPage.class,null);
返回v;
}
@凌驾
恢复时公开作废(){
super.onResume();
}
公共静态类TabsAdapter扩展了FragmentStatePagerAdapter,实现了TabHost.OnTabChangeListener、ViewPager.OnPageChangeListener
{
私有最终上下文mContext;
私有最终选项卡主机mTabHost;
专用最终查看页面mViewPager;
private final ArrayList mtab=new ArrayList();
静态最终类TabInfo
{
私有最终字符串标签;
私人期末班;
私有最终包args;
TabInfo(字符串标记、类、绑定参数)
{
标签=_标签;
clss=_类;
args=_args;
}
}
静态类DummyTabFactory实现TabHost.TabContentFactory
{
私有最终上下文mContext;
公共DummyTabFactory(上下文)
{
mContext=上下文;
}
公共视图createTabContent(字符串标记)
{
视图v=新视图(mContext);
v、 设置最小宽度(0);
v、 设置最小高度(0);
返回v;
}
}
公共TabsAdapter(FragmentActivity活动、TabHost TabHost、ViewPager寻呼机)
{
super(activity.getSupportFragmentManager());
mContext=活动;
mTabHost=tabHost;
mViewPager=寻呼机;
mTabHost.setOnTabChangedListener(此);
mViewPager.setAdapter(此);
mViewPager.setOnPageChangeListener(此);
}
public void addTab(TabHost.TabSpec TabSpec,类cls,Bundle args)
{
tabSpec.setContent(新的DummyTabFactory(mContext));
String tag=tabSpec.getTag();
TabInfo=新TabInfo(标签、clss、参数);
添加(信息);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
@凌驾
public int getCount()
{
返回mTabs.size();
}
@凌驾
公共片段getItem(int位置)
{
TabInfo=mTabs.get(位置);
返回Fragment.instantiate(mContext,info.clss.getName(),info.args);
}
已更改的公共无效项(字符串选项卡ID)
{
int position=mTabHost.getCurrentTab();
mViewPager.setCurrentItem(位置);
}
已滚动页面上的公共无效(int-position、float-positionOffset、int-positionOffsetPixels)
{
}
已选择页面上的公共无效(内部位置)
{
//不幸的是,当TabHost更改当前选项卡时,它会
//当不在触摸模式下时,也会注意聚焦。
//那个混蛋。
//这个黑客试图阻止它把我们的注意力从我们的
//寻呼机。
TabWidget widget=mTabHost.getTabWidget();
int oldFocusability=widget.getDegenantFocusability();
widget.setDegenantFocusability(ViewGroup.FOCUS\u BLOCK\u子体);
mTabHost.setCurrentTab(位置);
widget.setDegenantFocusability(oldFocusability);
}
公共无效onPageScrollStateChanged(int状态)
{
}
}
然后创建另外两个表示每个选项卡的片段并调用它们:
首页
第二页
将这些链接到
xml
文件,调用newmyfragment
,就可以开始了。下面是我编写的一个示例,它使用滑动功能创建TabHost
:
首先是保存适配器的主片段,并添加带有(两个子片段)的选项卡。
public class MyFragment extends Fragment
{
private TabHost mTabHost;
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
public MyFragment() {
}
@Override
public void onCreate(Bundle instance)
{
super.onCreate(instance);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_main, container, false);
mTabHost = (TabHost) v.findViewById(android.R.id.tabhost);
mTabHost.setup();
mViewPager = (ViewPager) v.findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(getActivity(), mTabHost, mViewPager);
// Here we load the content for each tab.
mTabsAdapter.addTab(mTabHost.newTabSpec("simple").setIndicator("HOME"), FirstPage.class, null);
mTabsAdapter.addTab(mTabHost.newTabSpec("simple").setIndicator("HOME"), SecondPage.class, null);
return v;
}
@Override
public void onResume() {
super.onResume();
}
public static class TabsAdapter extends FragmentStatePagerAdapter implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener
{
private final Context mContext;
private final TabHost mTabHost;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo
{
private final String tag;
private final Class<?> clss;
private final Bundle args;
TabInfo(String _tag, Class<?> _class, Bundle _args)
{
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory
{
private final Context mContext;
public DummyTabFactory(Context context)
{
mContext = context;
}
public View createTabContent(String tag)
{
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public TabsAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager)
{
super(activity.getSupportFragmentManager());
mContext = activity;
mTabHost = tabHost;
mViewPager = pager;
mTabHost.setOnTabChangedListener(this);
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args)
{
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
mTabs.add(info);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
@Override
public int getCount()
{
return mTabs.size();
}
@Override
public Fragment getItem(int position)
{
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
public void onTabChanged(String tabId)
{
int position = mTabHost.getCurrentTab();
mViewPager.setCurrentItem(position);
}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
{
}
public void onPageSelected(int position)
{
// Unfortunately when TabHost changes the current tab, it kindly
// also takes care of putting focus on it when not in touch mode.
// The jerk.
// This hack tries to prevent this from pulling focus out of our
// ViewPager.
TabWidget widget = mTabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mTabHost.setCurrentTab(position);
widget.setDescendantFocusability(oldFocusability);
}
public void onPageScrollStateChanged(int state)
{
}
}
公共类MyFragment扩展了片段
{
私有TabHost-mTabHost;
私有视图寻呼机mViewPager;
私有TabsAdapter mtabsapter;
公共MyFragment(){
}
@凌驾
创建公共void(捆绑包实例)
{
super.onCreate(实例);
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图v=充气机。充气(右布局。主,