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我很新的Android,学习了一下,我遇到了一个高于我的谷歌搜索技巧的问题。在片段中创建一个片段onClick
我有这样的:用工具栏和viewPager
fragment_main与按钮
主要活动
activity_main布局这一点,主要是剥离的问题:
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
private FragmentManager supportFragmentManager;
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
//TextView textView = (TextView) rootView.findViewById(R.id.section_label);
//textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
Button newFragmentBtn = (Button) rootView.findViewById(R.id.cameraBtn);
newFragmentBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// create new fragment with same layout on right so I can swipe to it
}
});
return rootView;
}
public FragmentManager getSupportFragmentManager() {
return supportFragmentManager;
}
}
/**
* returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
return 3;
}
}
}
所以我有现在3个片段(可能是任何数字),但我想这不是一个固定的数字,而是增加当我点击按钮时是在一个片段,所以,当我点击newFragmentBtn,它创建4个片段之间滑动,再次点击,5个片段等...
谢谢你的帮助。
[我如何将一个片段添加到ViewPager? addView崩溃我的应用程序](http://stackoverflow.com/questions/16232224/how-can-i-add-a-fragment-to-a-viewpager-addview-crashes-my-app) –
关键是' getCount'方法必须是动态的。让'getItem'从列表中拉出来 –