Question

我正在开发一个应用程序，我必须在其中实现一个允许我使用Button更改Fragment而不是在屏幕上抓取网站的功能。

Tutorial.java

public class Tutorial extends AppCompatActivity {
    private SectionsPagerAdapter mSectionsPagerAdapter;
    private ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tutorial_main);
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
        mViewPager = (ViewPager) findViewById(R.id.container);
        mViewPager.setAdapter(mSectionsPagerAdapter);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        return super.onOptionsItemSelected(item);
    }

PlaceholderFragment.java

    public static class PlaceholderFragment extends Fragment {
        private static final String ARG_SECTION_NUMBER = "section_number";

        public PlaceholderFragment() {}

        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_tutorial, container, false);

            Button next = (Button) rootView.findViewById(R.id.next);
            Button previous = (Button) rootView.findViewById(R.id.previous);
            RelativeLayout rl = (RelativeLayout) rootView.findViewById(R.id.relative_tutorial);

            switch (getArguments().getInt(ARG_SECTION_NUMBER)){

                 case 1:
                     rl.setBackgroundResource(R.drawable.one);
                     previous.setText("ESCI");

                     previous.setOnClickListener(new View.OnClickListener() {
                         public void onClick(View v) {
                             getActivity().finish();
                         }
                     });

                     next.setOnClickListener(new View.OnClickListener() {
                         public void onClick(View v) {

                         }
                     });

                 break;

                 case 2:
                     rl.setBackgroundResource(R.drawable.two);

                     next.setOnClickListener(new View.OnClickListener() {
                         public void onClick(View v) {

                         }
                     });
                 break;

                 case 3:
                     rl.setBackgroundResource(R.drawable.three);
                     next.setText("HOME");

                     next.setOnClickListener(new View.OnClickListener() {
                         public void onClick(View v) {
                         getActivity().finish();
                         Intent intent = new Intent(getContext(), MainActivity.class);
                         startActivity(intent);
                         }
                     });
                 break;
             }
            return rootView;
        }
    }

SectionsPagerAdapter.java

    public class SectionsPagerAdapter extends FragmentPagerAdapter {

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

        @Override
        public Fragment getItem(int position) {
            return PlaceholderFragment.newInstance(position + 1);
        }

        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
                case 0:
                    return "SECTION 1";
                case 1:
                    return "SECTION 2";
                case 2:
                    return "SECTION 3";
            }
            return null;
        }
    }
}

如何通过点击我的按钮切换“页面”，而不是在屏幕上抓取网站？

Answer 1

这是显示另一个片段的方式。所以，只需将此代码放在按钮onclick方法中。

示例：

FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); fragmentTransaction.replace(android.R.id.content, new Fragment_1(), "frag1"); fragmentTransaction.commit();

使用按钮更改选项卡式活动中的片段

1 个答案: