public class FragAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments ;
public FragAdapter(FragmentManager fm){
super(fm);
}
public FragAdapter(FragmentManager fm,List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
@Override
public int getCount() {
return fragments.size();
}
/**
* add the fragment to the special position
* @param location the position be added to.
* @param fragment
*/
public void addFragment(int location,Fragment fragment){
this.fragments.add(location, fragment);
this.notifyDataSetChanged();
}
/**
* add the fragment to the default position.the end of the list.
* @param fragment
*/
public void addFragment(Fragment fragment){
this.fragments.add(fragment);
this.notifyDataSetChanged();
}
}
MyFragment.java:
public class MyFragment extends Fragment {
private static final String TEXT_CHAT = "CHAT";
/**
* Factory method to generate a new instance of the fragment given a string .
*
* @param char 主页面要传过来的信息
* @return A new instance of MyFragment with chat extras
*/
public static MyFragment newInstance(String chat) {
final MyFragment f = new MyFragment();
final Bundle args = new Bundle();
args.putString(TEXT_CHAT, chat);
f.setArguments(args);
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.myfragment, container, false);
TextView tv = (TextView) view.findViewById(R.id.tv_fragment_text);
String str = getArguments() != null ? getArguments().getString(TEXT_CHAT) : null;
if(str != null){
tv.setText(str);
}else{
tv.setText("获取字段出错了，求指导");
}
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
MainActivity.java:
public class MainActivity extends FragmentActivity implements OnClickListener {
private ViewPager vp;
private TextView tv_no1;
private TextView tv_no2;
private FragAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
vp = (ViewPager) findViewById(R.id.vp_main);
tv_no1 = (TextView) findViewById(R.id.tv_no1);
tv_no2 = (TextView) findViewById(R.id.tv_no2);
tv_no1.setOnClickListener(this);
tv_no2.setOnClickListener(this);
initViewPage();
}
/**
* 初始化 view page的相关数据
*/
private void initViewPage() {
List<Fragment> fragments = new ArrayList<Fragment>();
fragments.add(MyFragment.newInstance("我是第一个界面，看到我，看到我"));
fragments.add(MyFragment.newInstance("我是第二个界面，看到我，看到我"));
adapter = new FragAdapter(getSupportFragmentManager(), fragments);
vp.setAdapter(adapter);
vp.setCurrentItem();
changeTextColor();
vp.setOnPageChangeListener(new MyVPageChangeListener());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private class MyVPageChangeListener implements OnPageChangeListener {
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageSelected(int location) {
changeTextColor(location);
}
}
/**
* 设置下面文本的颜色。
* @param location
*/
private void changeTextColor(int location) {
switch (location) {
case :
tv_no1.setTextColor(Color.RED);
tv_no2.setTextColor(Color.CYAN);
break;
case :
tv_no2.setTextColor(Color.RED);
tv_no1.setTextColor(Color.CYAN);
break;
default:
break;
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tv_no1:
vp.setCurrentItem();
break;
case R.id.tv_no2:
vp.setCurrentItem();
break;
default:
break;
}
}
}
FragAdapter.java: