FragmentActivity.java 文件源码

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.fragment_activity_layout);

    mViewPager = (ViewPager)findViewById(R.id.fragment_pager);

    imageFragment = Fragment.instantiate(this, ImageFragment.class.getName());
    textFragment = Fragment.instantiate(this, TextFragment.class.getName());
    image2Fragment = Fragment.instantiate(this, ImageFragment.class.getName());
    text2Fragment = Fragment.instantiate(this, TextFragment.class.getName());

    mViewPager.setOffscreenPageLimit(4);
    mViewPager.setCurrentItem(0);
    mViewPager.setAdapter(new FPagerAdapter(getSupportFragmentManager()));
}