我正在尝试熟悉ViewPager。我的代码如下所示。问题在于onPageChangeListener方法没有被调用。可能的问题是什么?
public class TabsViewPagerFragmentActivity extends SherlockFragmentActivity implements ViewPager.OnPageChangeListener {
private ViewPager mViewPager;
private PagerAdapter mPagerAdapter;
private PageIndicator mIndicator;
private static final String[] CONTENT = new String[] { "Home", "Popular", "Chat", "Profile"};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar bar = getSupportActionBar();
View customview = LayoutInflater.from(this).inflate(R.layout.actionbar_custom_layout, null);
ImageView im = (ImageView)customview.findViewById(R.id.add);
/*im.getLayoutParams().height = h;
im.getLayoutParams().width = h;*/
bar.setCustomView(customview);
bar.setDisplayShowCustomEnabled(true);
bar.setDisplayShowTitleEnabled(false);
bar.setDisplayShowHomeEnabled(false);
// Inflate the layout
setContentView(R.layout.tabs_viewpager_layout);
// Intialise ViewPager
this.intialiseViewPager();
mIndicator = (TitlePageIndicator)findViewById(R.id.titles);
mIndicator.setViewPager(mViewPager);
TitlePageIndicator indicator = (TitlePageIndicator)findViewById(R.id.titles);
indicator.setTextColor(0xAAfb891e);
indicator.setSelectedColor(0xFFfb891e);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("Search")
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
return true;
}
public int getCount() {
return CONTENT.length;
}
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
private void intialiseViewPager() {
this.mPagerAdapter = new PagerAdapter(super.getSupportFragmentManager(),
fragments);
this.mViewPager = (ViewPager)super.findViewById(R.id.viewpager);
this.mViewPager.setAdapter(this.mPagerAdapter);
this.mViewPager.setOnPageChangeListener(this);
}
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
// TODO Auto-generated method stub
System.out.println(positionOffsetPixels);
}
public void onPageSelected(int position) {
// TODO Auto-generated method stub
System.out.println(position);
}
public void onPageScrollStateChanged(int state) {
// TODO Auto-generated method stub
System.out.println(state);
}
}
我的意思是,当我滚动页面时,在Logcat中没有任何输出。