Android使用Fragment嵌套Fragment的模式实现界面滑动

Android使用Fragment嵌套Fragment的方式实现界面滑动
// 主Activity
public class HomeActivity extends FragmentActivity implements OnClickListener {
private TextView footerLeft;
private TextView footerMiddle;
private TextView footerRight;

private Context context;
private FragmentManager fragmentManager;

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

initArgs();

getView2Init();

initFragment(new Fragment1());

}

/**
* 初始化变量
*/
private void initArgs() {
context = HomeActivity.this;
fragmentManager = getSupportFragmentManager();

}

/**
* 获得布局文件上的控件并初始化
*/
private void getView2Init() {
// 获得控件View
footerLeft = (TextView) findViewById(R.id.tv_footer_left);
footerMiddle = (TextView) findViewById(R.id.tv_footer_middle);
footerRight = (TextView) findViewById(R.id.tv_footer_right);
// 初始化控件View
footerLeft.setOnClickListener(this);
footerMiddle.setOnClickListener(this);
footerRight.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// 当footer中的三个文本控件被点击时，作出回应
if (v == footerLeft) {
Toast.makeText(context, "点击了底栏left左边按钮", Toast.LENGTH_SHORT).show();
updateFragment(new Fragment1(), false);
} else if (v == footerMiddle) {
Toast.makeText(context, "点击了底栏middle中间按钮", Toast.LENGTH_SHORT).show();
updateFragment(new Fragment2(), false);
} else if (v == footerRight) {
Toast.makeText(context, "点击了底栏Right右边按钮", Toast.LENGTH_SHORT).show();
updateFragment(new Fragment3(), false);
}
}

/**
* 初始化Fragment
*
* @param f
*/
private void initFragment(Fragment f) {
updateFragment(f, true);
}

/**
* 更新Fragment
*
* @param f
* @param isInit
*/
private void updateFragment(Fragment f, boolean isInit) {
FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.id.content, f);
ft.commit();
}

}
// 用来实现切换的Adapter
public class MyPagerAdapter1 extends FragmentStatePagerAdapter {
protected static final String[] SUB_FRAGMENT = new String[] { "Fragment1_1", "Fragment1_2",
"Fragment1_3" }; // 对应于每个大Fragment的小Fragment

private int mCount = SUB_FRAGMENT.length;

public MyPagerAdapter1(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int position) {
if (0 == position) {
return new Fragment1_1();
} else if (1 == position) {
return new Fragment1_2();
} else if (2 == position) {
return new Fragment1_3();
} else {
System.out.println("创建子Fragment1_" + position + "失败");
return null;
}
}

@Override
public int getCount() {
return mCount;
}

@Override
public CharSequence getPageTitle(int position) {
return SUB_FRAGMENT[position % mCount];
}

}
// 主Activity下有三个一级Fragment，这是其中之一
public class Fragment1 extends Fragment {
private MyPagerAdapter1 mAdapter;
private ViewPager mPager;
private TitlePageIndicator mIndicator;
private static int mCurrentSubFragmentSeq = 0;

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

setRetainInstance(true);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View v = inflater.inflate(R.layout.fragment1, container, false);
System.out.println("F1:onCreateView");
mAdapter = new MyPagerAdapter1(getFragmentManager());
mPager = (ViewPager) v.findViewById(R.id.pager);
mPager.setAdapter(mAdapter);

mIndicator = (TitlePageIndicator) v.findViewById(R.id.titles);
mIndicator.setViewPager(mPager, mCurrentSubFragmentSeq);
System.out.println("2、mCurrent Sub Fragment Sequence: " + mCurrentSubFragmentSeq);
mIndicator.setFooterIndicatorStyle(IndicatorStyle.Triangle);

mIndicator.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
System.out.println("Changed to page " + position);
mCurrentSubFragmentSeq = position;
}

@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}

@Override
public void onPageScrollStateChanged(int state) {
}
});
return v;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);

}

}
// 每个一级Framgment下面有三个二级Fragment，这是其中之一
public class Fragment1_1 extends Fragment {
private static final String KEY_CONTENT = "Fragment1:Content";
private Bundle bundle;

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

if ((savedInstanceState != null) && savedInstanceState.containsKey(KEY_CONTENT)) {
bundle = savedInstanceState.getBundle(KEY_CONTENT);
}
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment1_1, container, false);
return v;
}

@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBundle(KEY_CONTENT, bundle);
}

}

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