Android Tab实现之ViewPager+FragmentActivity

1.界面需要extends FragmentActivity

2. 使用的是v4版本的Fragment

3.viewpager设置的adapter是FragmentPagerAdapter

<LinearLayout 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:orientation="vertical"
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">

<android.support.v4.view.ViewPager
android:id="@+id/vp"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />

<include layout="@layout/bottom_menu" />

</LinearLayout>

package com.example.baidu.mydemos.demo1;

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.widget.RadioGroup;

import com.example.baidu.mydemos.R;

import java.util.ArrayList;

/**
* Created by baidu on 15/12/31.
*/

//通过ViewPager和Fragment实现
public class DemoOneMenuThreeActivity extends FragmentActivity {
private ViewPager viewPager;
private FragmentPagerAdapter fragmentPagerAdapter;
private ArrayList<Fragment> arrayListFragments;
private RadioGroup rg_bottom;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demo1_3);
rg_bottom = (RadioGroup) findViewById(R.id.rg_bottom);
rg_bottom.check(R.id.rb_1);
initFragments();
viewPager = (ViewPager) findViewById(R.id.vp);
fragmentPagerAdapter = new MyFragmentPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(fragmentPagerAdapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
switch (position) {
case 0:
rg_bottom.check(R.id.rb_1);
break;
case 1:
rg_bottom.check(R.id.rb_2);
break;
case 2:
rg_bottom.check(R.id.rb_3);
break;
}

}

@Override
public void onPageScrollStateChanged(int state) {

}
});

rg_bottom.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.rb_1:
viewPager.setCurrentItem(0);
break;
case R.id.rb_2:
viewPager.setCurrentItem(1);
break;
case R.id.rb_3:
viewPager.setCurrentItem(2);
break;
}
}
});
}

class MyFragmentPagerAdapter extends FragmentPagerAdapter {

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

@Override
public Fragment getItem(int position) {
return arrayListFragments.get(position);
}

@Override
public int getCount() {
return arrayListFragments.size();
}
}

public void initFragments() {
arrayListFragments = new ArrayList<Fragment>();
arrayListFragments.add(new FragmentOneContent());
arrayListFragments.add(new FragmentTwoContent());
arrayListFragments.add(new FragmentThreeContent());
}
}