Question

我想使用RecyclerView在滑动标签中显示文字和图像。我认为我已经正确设置了这一点，我认为拼图的最后一部分是LayoutManager，但它在onCreateView下给了我一个错误我已经为它做了一个变量所以我不知道如何继续下去。 / p>

这就是它必须看到的结尾

enter image description here

主要活动

public class MainActivity extends AppCompatActivity {

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

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    ViewPager pager = (ViewPager) findViewById(R.id.viewPager);
    pager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
    PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) findViewById(R.id.tabs);
    tabs.setBackgroundColor(getResources().getColor(R.color.colorPrimaryDark));
    tabs.setIndicatorColor(getResources().getColor(R.color.colorAccent));
    tabs.setDividerColor(getResources().getColor(R.color.colorPrimary));
    tabs.setTextColor(getResources().getColor(R.color.colorTest));
    tabs.setViewPager(pager);


}

class MyPagerAdapter extends FragmentPagerAdapter {

    String[] adapter_one_tabs;


    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
        adapter_one_tabs = getResources().getStringArray(R.array.adapter_one_tabs);
    }

    @Override
    public Fragment getItem(int position) {

        return MyFragment.getInstance(position);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return adapter_one_tabs[position];
    }

    @Override
    public int getCount() {
        return 4;
    }
}


public static class MyFragment extends Fragment {
    public static final String TAB_POSITION_KEY = "TAB_POSITION_KEY";
    private RecyclerView mRecyclerView;
    private RecyclerView.LayoutManager mLayoutManager;
    private RecyclerView.Adapter mAdapter;


    public static MyFragment getInstance(int position) {

        MyFragment myFragment = new MyFragment();
        Bundle args = new Bundle();
        args.putInt(TAB_POSITION_KEY, position);
        myFragment.setArguments(args);
        return myFragment;
    }

    @Override

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View layout = inflater.inflate(R.layout.recyclerview_fragment, container, false);

        Bundle bundle = getArguments();

        int position = bundle.getInt(TAB_POSITION_KEY);

        mRecyclerView = (RecyclerView) layout.findViewById(R.id.recycler_view);

        switch (position) {

            case 0:

                mAdapter = new AdapterOne();
                mRecyclerView.setAdapter(mAdapter);


                break;

            case 1:

                mAdapter = new AdapterTwo();
                mRecyclerView.setAdapter(mAdapter);


                break;

            case 2:

                mAdapter = new AdapterThree();
                mRecyclerView.setAdapter(mAdapter);


                break;

            case 3:

                mAdapter = new AdapterFour();
                mRecyclerView.setAdapter(mAdapter);


                break;

        }

        return layout;
    }

}

}

AdapterOne

public class AdapterOne extends RecyclerView.Adapter<AdapterOne.ViewHolder> {

List<AdapterData> mItems;

public AdapterOne() {
    super();
    mItems = new ArrayList<AdapterData>();
    AdapterData data = new AdapterData();
    data.setThumbnail(R.drawable.afghanistan);
    data.setName("Afghanistan");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.albania);
    data.setName("Albania");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.algeria);
    data.setName("Algeria");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.american_samoa);
    data.setName("American Samoa");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.andorra);
    data.setName("Andorra");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.angola);
    data.setName("Angola");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.anguilla);
    data.setName("Anguilla");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.antigua_and_barbuda);
    data.setName("Antigua and Barbuda");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.argentina);
    data.setName("Argentina");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.armenia);
    data.setName("Armenia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.aruba);
    data.setName("Aruba");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.australia);
    data.setName("Australia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.austria);
    data.setName("Austria");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.azerbaijan);
    data.setName("Azerbaijan");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bahamas);
    data.setName("Bahamas");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bahrain);
    data.setName("Bahrain");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bangladesh);
    data.setName("Bangladesh");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.barbados);
    data.setName("Barbados");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.belarus);
    data.setName("Belarus");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.belgium);
    data.setName("Belgium");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.belize);
    data.setName("Belize");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.benin);
    data.setName("Benin");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bermuda);
    data.setName("Bermuda");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bhutan);
    data.setName("Bhutan");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bolivia);
    data.setName("Bolivia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bosnia_and_herzegovina);
    data.setName("Bosnia and Herzegovina");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.botswana);
    data.setName("Botswana");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.brazil);
    data.setName("Brazil");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.british_virgin_islands);
    data.setName("British Virgin Islands");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.brunei);
    data.setName("Brunei");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.bulgaria);
    data.setName("Bulgaria");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.burkina_faso);
    data.setName("Burkina Faso");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.burundi);
    data.setName("Burundi");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cambodia);
    data.setName("Cambodia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cameroon);
    data.setName("Cameroon");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.canada);
    data.setName("Canada");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cape_verde);
    data.setName("Cape Verde");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cayman_islands);
    data.setName("Cayman Islands");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.central_african_republic);
    data.setName("Central African Republic");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.chad);
    data.setName("Chad");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.chile);
    data.setName("Chile");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.china);
    data.setName("China");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.colombia);
    data.setName("Colombia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.comoros);
    data.setName("Comoros");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cook_islands);
    data.setName("Cook Islands");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.costa_rica);
    data.setName("Costa Rica");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cote_divoire);
    data.setName("Cote d'Ivoire");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.croatia);
    data.setName("Croatia");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cuba);
    data.setName("Cuba");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cayman_islands);
    data.setName("Cayman Island");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.curacao);
    data.setName("Curacao");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.cyprus);
    data.setName("Cyprus");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.czech_republic);
    data.setName("Czech Republic");
    mItems.add(data);

    data = new AdapterData();
    data.setThumbnail(R.drawable.democratic_republic_of_the_congo);
    data.setName("Democratic Republic of the Congo");
    mItems.add(data);


}

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View v = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.recycler_view_card_item, viewGroup, false);
    return new ViewHolder(v);
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
    AdapterData movie = mItems.get(i);
    viewHolder.natThumbnail.setImageResource(movie.getThumbnail());
    viewHolder.natName.setText(movie.getName());
}

@Override
public int getItemCount() {

    return mItems.size();
}

class ViewHolder extends RecyclerView.ViewHolder{

    public ImageView natThumbnail;
    public TextView natName;


    public ViewHolder(View itemView) {
        super(itemView);
        natThumbnail = (ImageView)itemView.findViewById(R.id.layoutThumbnail);
        natName = (TextView)itemView.findViewById(R.id.layoutName);
    }
}
}

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="@color/colorBackground"
android:orientation="vertical"
tools:context=".MainActivity">

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:background="@color/colorPrimary"
    android:minHeight="?attr/actionBarSize" >
</android.support.v7.widget.Toolbar>

<com.astuetz.PagerSlidingTabStrip
    android:id="@+id/tabs"
    android:layout_width="match_parent"
    android:layout_height="48dip" />

<android.support.v4.view.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="0dp" />


</LinearLayout>

recyclerview_fragment.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</LinearLayout>

recycler_view_card_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:foreground="?android:attr/selectableItemBackground"
    card_view:cardCornerRadius="3dp"
    card_view:cardUseCompatPadding="true">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#DDD">

        <ImageView
            android:id="@+id/layoutThumbnail"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:src="@drawable/afghanistan"
            android:gravity="center_vertical"
            android:layout_centerHorizontal="true"
            />
        <TextView

            android:id="@+id/layoutName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Country Name"
            android:textSize="@dimen/abc_text_size_body_1_material"
            android:layout_below="@id/layoutThumbnail"
            android:layout_centerInParent="true"

            />
    </RelativeLayout>

</android.support.v7.widget.CardView>

</LinearLayout>

Answer 1

好吧，我得到你的错误：

日志说no suitable constructor found for GridLayoutManager(MyFragment, int)。

GridLayoutManager的可用构造函数是：

// Constructor used when layout manager is set in XML by RecyclerView attribute "layoutManager".
GridLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) 

// Creates a vertical GridLayoutManager
GridLayoutManager(Context context, int spanCount)

GridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout)

正如您所看到的，第一个参数是Context而不是Fragment：）

只需将this更改为上下文：

mLayoutManager = new GridLayoutManager(getActivity(), 3); 
mRecyclerView.setLayoutManager(mLayoutManager);

它通常会起作用：）

修改

我把代码放在了可以放行的地方：

public static class MyFragment extends Fragment {

    ...

    @override
    public void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // HERE YOU INITIALIZE THE GRID LAYOUT MANAGER
        mLayoutManager = new GridLayoutManager(getActivity(), 3); 
    }

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View layout = inflater.inflate(R.layout.recyclerview_fragment, container, false);
        Bundle bundle = getArguments();
        int position = bundle.getInt(TAB_POSITION_KEY);

        mRecyclerView = (RecyclerView) layout.findViewById(R.id.recycler_view);

        switch (position) {
            ...
        }

       // HERE YOU SET THE RECYCLER VIEW
       mRecyclerView.setLayoutManager(mLayoutManager); 

       return layout;
    }

}

使用RecyclerView滑动标签

1 个答案:

修改