java - 使用 ViewPager 时如何运行按钮的正常功能

Question

今天是我使用ViewPager在我的活动中滑动屏幕的第一天。但是，添加ViewPager后，我在任何活动中的按钮似乎都不起作用。我只能在我的活动之间滑动。我不明白为什么会发生这种情况，所以任何帮助将不胜感激。谢谢！

这是 PageAdapter 类代码：

PageAdapter.java

public class PagerAdapter extends FragmentPagerAdapter {

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

    @Override
    public Fragment getItem(int position) {
        switch (position){
            case 0:
                return new FragmentOne();
                break;
            case 1:
                return new FragmentTwo();
                break;
            case 2:
                return new FragmentThree();
                break;
            default:
                break;
        }
        return null;
    }

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

这是片段代码：

FragmentOne.java

public class FragmentOne extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.activity_log,container,false);
    }
}

片段二.java

public class FragmentTwo extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.activity_remote_lock,container,false);
    }
}

片段三.java

public class FragmentThree extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.activity_my_keys,container,false);
    }
}

片段活动.java

public class FragmentActivity extends android.support.v4.app.FragmentActivity {

    ViewPager viewPager;

    @Override
    protected void onResume() {
        super.onResume();
        viewPager.setCurrentItem(1);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fragment);
        viewPager = (ViewPager) findViewById(R.id.damsara);
        PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);
    }
}

片段活动.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/damsara"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
</android.support.v4.view.ViewPager>

我添加到片段类的 xml 文件包含带有动画的按钮。但是它们都不起作用。

标签： javaandroidandroid-viewpagerfragment