Android中实现可滑动的Tab的3种方式

1. 第一种，使用 TabHost + ViewPager 实现

该方法会有一个Bug，当设置tabHost.setCurrentTab()为0时，ViewPager不显示（准确的说是加载），只有点击其他任意一个tab后才会加载。

有解的同学吼一声~~~~~~~

Activity:

复制代码 代码如下:

package com.swordy.demo.android.fragment;

import java.util.Random;

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.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabWidget;
import android.widget.TextView;

import com.swordy.demo.android.R;
import com.swordy.library.android.util.ELog;

/**
* 1. 使用TabHost和ViewPager组合实现一个可以滑动的tab
* 2. bug：如果当前页为0，则ViewPager第一次不加载。
*
* @author swordy
* @email [email protected]
* @since Jan 20, 2014
* @version 1.0
*/
public class SlideTabs1 extends FragmentActivity
{
private static final String TAG = "AndroidDemos.SlideTabs1";

private TabHost mTabHost;

private ViewPager mViewPager;

private PagerAdapter mPagerAdapter;

private String[] addresses = { "first", "second", "third" };

@Override
protected void onCreate(Bundle arg0)
{
super.onCreate(arg0);
setContentView(R.layout.fragment_slidetabs1);

mViewPager = (ViewPager) findViewById(R.id.viewPager1);
mPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(mPagerAdapter);

mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
mTabHost.addTab(mTabHost.newTabSpec("one").setIndicator("one-1")
.setContent(R.id.viewPager1));
mTabHost.addTab(mTabHost.newTabSpec("two").setIndicator("two-2")
.setContent(R.id.viewPager1));
mTabHost.addTab(mTabHost.newTabSpec("three").setIndicator("three-3")
.setContent(R.id.viewPager1));

TabWidget tabWidget = mTabHost.getTabWidget();
int count = tabWidget.getChildCount();
for (int i = 0; i != count; i++)
{
final int index = i;
tabWidget.getChildAt(i).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v)
{
mTabHost.setCurrentTab(index);
mViewPager.setCurrentItem(index);
}
});
}
mTabHost.setOnTabChangedListener(new OnTabChangeListener() {

@Override
public void onTabChanged(String tabId)
{
ELog.i(TAG, "@--> onTabChanged by tabId: " + tabId);
}
});

mViewPager.setOnPageChangeListener(new OnPageChangeListener() {

@Override
public void onPageSelected(int arg0)
{
ELog.i(TAG, "@--> onPageSelected: " + arg0);
mTabHost.setCurrentTab(arg0);
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2)
{

}

@Override
public void onPageScrollStateChanged(int arg0)
{

}
});
}

private class MyPagerAdapter extends FragmentStatePagerAdapter
{

public MyPagerAdapter(FragmentManager fm)
{
super(fm);
}

@Override
public Fragment getItem(int position)
{
ELog.i(TAG, "@--> getItem by position" + position);
ELog.i(TAG, "@--> getItem by position" + position);
return MyFragment.create(addresses[position]);
}

@Override
public int getCount()
{
return addresses.length;
}

}

public static class MyFragment extends Fragment
{
public static MyFragment create(String address)
{
ELog.i(TAG, "@--> MyFragment.create()");
MyFragment f = new MyFragment();
Bundle b = new Bundle();
b.putString("address", address);
f.setArguments(b);
return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
Random r = new Random(System.currentTimeMillis());

Bundle b = getArguments();

View v = inflater.inflate(R.layout.fragment_viewpager1_layout1, null);
v.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

TextView txvAddress = (TextView) v.findViewById(R.id.textView1);
txvAddress.setTextColor(r.nextInt() >> 8 | 0xFF << 24);
txvAddress.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

txvAddress.setText(b.getString("address", ""));
return v;
}

}
}

布局：

复制代码 代码如下:

android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >

android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right|center_vertical" />

android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >

android:id="@+id/viewPager1"
android:layout_width="match_parent"
android:layout_height="match_parent" />

2. 第二种，使用官方提供的方法 ActionBar + ViewPager 实现

该方法有两个缺陷，或者说不是缺陷，只是我没有找到解决的办法。

第一，tab点上不是很灵敏，可能就是这么设定的，为了防止频繁加载吧，但是体验稍稍不爽；

第二，ActionBar在最顶部，如果我的布局是：顶部一个带返回按钮的标题栏，中间是tab，底部是tabcontent，怎么搞？

Activity：

复制代码 代码如下:

package com.swordy.demo.android.fragment;

import java.util.Random;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
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.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.swordy.demo.android.R;

/**
* 1. 使用ActionBar和ViewPager实现可以滑动的Tab
*
* @author swordy
* @email [email protected]
* @since Jan 20, 2014
* @version 1.0
*/
public class SlideTabs2 extends FragmentActivity
{
private static final String TAG = "AndroidDemos.SlideTabs2";

private ViewPager mViewPager;

private ActionBar mActionBar;

private MyPagerAdapter mPagerAdapter;

private String[] addresses = { "first", "second", "third" };

private Tab[] mTabs = new Tab[addresses.length];

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_viewpager1);
mViewPager = (ViewPager) findViewById(R.id.viewPager1);
mPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(mPagerAdapter);
mViewPager.setOnPageChangeListener(mPageChangeListener);

mActionBar = getActionBar();
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mActionBar.setDisplayShowTitleEnabled(false);
mActionBar.setDisplayShowHomeEnabled(false);

for (int i = 0; i != addresses.length; i++)
{
mTabs[i] = mActionBar.newTab().setText(addresses[i]).setTabListener(mTabListener);
mActionBar.addTab(mTabs[i]);
}

}

private OnPageChangeListener mPageChangeListener = new OnPageChangeListener() {

@Override
public void onPageSelected(int arg0)
{
mActionBar.setSelectedNavigationItem(arg0);
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2)
{

}

@Override
public void onPageScrollStateChanged(int arg0)
{

}
};

private TabListener mTabListener = new TabListener() {

@Override
public void onTabSelected(Tab tab, android.app.FragmentTransaction ft)
{
if (tab == mTabs[0])
{
mViewPager.setCurrentItem(0);
} else if (tab == mTabs[1])
{
mViewPager.setCurrentItem(1);
} else if (tab == mTabs[2])
{
mViewPager.setCurrentItem(2);
}

}

@Override
public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft)
{
// TODO Auto-generated method stub

}

@Override
public void onTabReselected(Tab tab, android.app.FragmentTransaction ft)
{
// TODO Auto-generated method stub

}
};

public class MyPagerAdapter extends FragmentPagerAdapter
{

public MyPagerAdapter(FragmentManager fm)
{
super(fm);
}

@Override
public Fragment getItem(int position)
{
return MyFragment.create(addresses[position]);
}

@Override
public int getCount()
{
return addresses.length;
}
}

public static class MyFragment extends Fragment
{
public static MyFragment create(String address)
{
MyFragment f = new MyFragment();
Bundle b = new Bundle();
b.putString("address", address);
f.setArguments(b);
return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
Random r = new Random(System.currentTimeMillis());

Bundle b = getArguments();

View v = inflater.inflate(R.layout.fragment_viewpager1_layout1, null);
v.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

TextView txvAddress = (TextView) v.findViewById(R.id.textView1);
txvAddress.setTextColor(r.nextInt() >> 8 | 0xFF << 24);
txvAddress.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

txvAddress.setText(b.getString("address", ""));
return v;
}

}
}

布局：

复制代码 代码如下:

android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

android:id="@+id/viewPager1"
android:layout_width="match_parent"
android:layout_height="match_parent" />

3. 【推荐】第三种，使用 TabWidget + ViewPager 实现
该方法不错，推荐使用。

Activity：

复制代码 代码如下:

package com.swordy.demo.android.fragment;

import java.util.Random;

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.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TabWidget;
import android.widget.TextView;

import com.swordy.demo.android.R;

/**
* 1. 使用TabWidget和ViewPager实现可滑动的Tab
*
* @author swordy
* @email [email protected]
* @since Jan 20, 2014
* @version 1.0
*/
public class SlideTabs3 extends FragmentActivity
{
private static final String TAG = "AndroidDemos.SlideTabs3";

private ViewPager mViewPager;

private PagerAdapter mPagerAdapter;

private TabWidget mTabWidget;

private String[] addresses = { "first", "second", "third" };

private Button[] mBtnTabs = new Button[addresses.length];

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_slidetabs3);

mTabWidget = (TabWidget) findViewById(R.id.tabWidget1);
mTabWidget.setStripEnabled(false);
mBtnTabs[0] = new Button(this);
mBtnTabs[0].setFocusable(true);
mBtnTabs[0].setText(addresses[0]);
mBtnTabs[0].setTextColor(getResources().getColorStateList(R.color.button_bg_color_selector));
mTabWidget.addView(mBtnTabs[0]);
/*
* Listener必须在mTabWidget.addView()之后再加入，用于覆盖默认的Listener，
* mTabWidget.addView()中默认的Listener没有NullPointer检测。
*/
mBtnTabs[0].setOnClickListener(mTabClickListener);

mBtnTabs[1] = new Button(this);
mBtnTabs[1].setFocusable(true);
mBtnTabs[1].setText(addresses[1]);
mBtnTabs[1].setTextColor(getResources().getColorStateList(R.color.button_bg_color_selector));
mTabWidget.addView(mBtnTabs[1]);
mBtnTabs[1].setOnClickListener(mTabClickListener);

mBtnTabs[2] = new Button(this);
mBtnTabs[2].setFocusable(true);
mBtnTabs[2].setText(addresses[2]);
mBtnTabs[2].setTextColor(getResources().getColorStateList(R.color.button_bg_color_selector));
mTabWidget.addView(mBtnTabs[2]);
mBtnTabs[2].setOnClickListener(mTabClickListener);

mViewPager = (ViewPager) findViewById(R.id.viewPager1);
mPagerAdapter = new MyPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(mPagerAdapter);
mViewPager.setOnPageChangeListener(mPageChangeListener);

mTabWidget.setCurrentTab(0);
}

private OnClickListener mTabClickListener = new OnClickListener() {

@Override
public void onClick(View v)
{
if (v == mBtnTabs[0])
{
mViewPager.setCurrentItem(0);
} else if (v == mBtnTabs[1])
{
mViewPager.setCurrentItem(1);

} else if (v == mBtnTabs[2])
{
mViewPager.setCurrentItem(2);

}
}
};

private OnPageChangeListener mPageChangeListener = new OnPageChangeListener() {

@Override
public void onPageSelected(int arg0)
{
mTabWidget.setCurrentTab(arg0);
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2)
{

}

@Override
public void onPageScrollStateChanged(int arg0)
{

}
};

private class MyPagerAdapter extends FragmentStatePagerAdapter
{

public MyPagerAdapter(FragmentManager fm)
{
super(fm);
}

@Override
public Fragment getItem(int position)
{
return MyFragment.create(addresses[position]);
}

@Override
public int getCount()
{
return addresses.length;
}

}

public static class MyFragment extends Fragment
{
public static MyFragment create(String address)
{
MyFragment f = new MyFragment();
Bundle b = new Bundle();
b.putString("address", address);
f.setArguments(b);
return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
Random r = new Random(System.currentTimeMillis());

Bundle b = getArguments();

View v = inflater.inflate(R.layout.fragment_viewpager1_layout1, null);
v.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

TextView txvAddress = (TextView) v.findViewById(R.id.textView1);
txvAddress.setTextColor(r.nextInt() >> 8 | 0xFF << 24);
txvAddress.setBackgroundColor(r.nextInt() >> 8 | 0xFF << 24);

txvAddress.setText(b.getString("address", ""));
return v;
}

}
}

布局：

复制代码 代码如下:

android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

android:id="@+id/tabWidget1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right|center_vertical" />

android:id="@+id/viewPager1"
android:layout_width="match_parent"
android:layout_height="match_parent" />