Question

我是Android开发的新手，似乎没有其他人遇到这个问题，所以也许我只是密集了。

无论如何，我的问题是我的格式化viewPager每次更改屏幕时都会显示相同的字符串。我使用this教程来创建它，因此我的代码与示例代码相同。如何正确格式化代码/我应该添加什么代码以便在翻页时显示不同的屏幕？

编辑：我的代码

主

public class Home extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    mPager = (ViewPager) findViewById(R.id.pager);
    mPagerAdapter = new ScreenSlidePager.ScreenSlidePagerAdapter(getSupportFragmentManager());
    mPager.setAdapter(mPagerAdapter);

  }


  private static final int NUM_PAGES = 5;

  private ViewPager mPager;

  private PagerAdapter mPagerAdapter;

  @Override
  public void onBackPressed() {
      if (mPager.getCurrentItem() == 0) {
      }
      else {
        mPager.setCurrentItem(mPager.getCurrentItem() - 1);
      }
  }

public class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
    public ScreenSlidePagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        return new ScreenSlidePageFragment();
    }

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

ScreenSlidePageFragment

public class ScreenSlidePageFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    ViewGroup rootView = (ViewGroup)
            inflater.inflate(R.layout.fragment_screen_slide_page, container, false);

    return rootView;
}

}

fragment_screen_slide_page

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<TextView style="?android:textAppearanceMedium"
    android:padding="16dp"
    android:lineSpacingMultiplier="1.2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/lorem_ipsum" />

Home.xml

    <LinearLayout
android:layout_width="390dp"
android:layout_height="200dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:orientation="vertical"
app:layout_constraintBottom_toTopOf="@id/ffweButton"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/homeButton"
app:layout_constraintVertical_bias="0.6">

    <android.support.v4.view.ViewPager
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

Answer 1

尝试像这样添加片段到您的适配器

    adapter.addFragment(new Fragment1(), "FRAG1");
    adapter.addFragment(new Fragment2(), "FRAG2");
    adapter.addFragment(new Fragment3(), "FRAG3");

然后调用它

    viewPager.setAdapter(adapter);

你还可以发布活动home.xml吗？

viewPager每次都显示相同的页面

1 个答案: