我正在关注此示例.. https://bitbucket.org/owentech/abstabsviewpager/src
我尝试在setOnClickListener
方法中为Button
实施OnCreate
并将其强制关闭。
注意:没有实施Button
工作正常..
代码:
public class ABSTabsViewPagerActivity extends SherlockFragmentActivity {
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
Button b;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
b = (Button) findViewById(R.id.buttonA);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Button Clicked",
Toast.LENGTH_SHORT).show();
}
});
ActionBar bar = getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText("Fragment 1"),
FragmentOne.class, null);
mTabsAdapter.addTab(bar.newTab().setText("Fragment 2"),
FragmentTwo.class, null);
mTabsAdapter.addTab(bar.newTab().setText("Fragment 3"),
FragmentThree.class, null);
}
public static class TabsAdapter extends FragmentPagerAdapter implements
ActionBar.TabListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = activity.getSupportActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
@Override
public int getCount() {
return mTabs.size();
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(),
info.args);
}
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
}
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
public void onPageScrollStateChanged(int state) {
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Object tag = tab.getTag();
for (int i = 0; i < mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
}
答案 0 :(得分:1)
您的setContentView(mViewPager)
只有viewpager。所以目前的布局中没有按钮。你不能得到这样的按钮b = (Button) findViewById(R.id.buttonA);
设置完整的布局,其中也包含xml中的按钮。
答案 1 :(得分:1)
很明显,您尝试通过调用Button
引用的findViewById()
不在根布局中,因为根View
是ViewPager
。您应该创建一个ViewPager
和Button
都存在的布局。希望这会有所帮助。