Question

我正在尝试打开一个新片段，但收到错误：

无法解析getFragmentManager

我尝试了一些解决方案，但仍然遇到错误。我该如何解决？

这是我的适配器代码，我设置了OnClickListener：

public class RecyclerViewDataAdapter extends RecyclerView.Adapter<RecyclerViewDataAdapter.ViewHolder> {
private Context context;
public ImageLoader mImageLoader;

//List of superHeroes
List<ListOfData> superHeroes;

public RecyclerViewDataAdapter(List<ListOfData> superHeroes, Context context) {
    super();
    //Getting all the superheroes
    this.superHeroes = superHeroes;
    this.context = context;

}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.recyclerview_row, parent, false);
    ViewHolder viewHolder = new ViewHolder(v);
    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    ListOfData superHero = superHeroes.get(position);

    mImageLoader = MyApplication.getInstance().getImageLoader();
    mImageLoader.get(superHero.getImageUrl(), ImageLoader.getImageListener(holder.imageView1, R.mipmap.ic_launcher, android.R.drawable.ic_dialog_alert));
    holder.imageView1.setImageUrl(superHero.getImageUrl(), mImageLoader);
    holder.textViewName1.setText(superHero.getName());
    //holder.textViewName2.setText(superHero.getName());
    //holder.textViewRank.setText(String.valueOf(superHero.getRank()));
    //holder.textViewRealName.setText(superHero.getRealName());
    //holder.textViewCreatedBy.setText(superHero.getCreatedBy());
    //holder.textViewFirstAppearance.setText(superHero.getFirstAppearance());

    String powers = "";

   /* for(int i = 0; i<superHero.getPowers().size(); i++){
        powers+= superHero.getPowers().get(i);
    }*/

    //holder.textViewPowers.setText(powers);

    holder.imageView1.setOnClickListener(new View.OnClickListener() {
        public Activity context;
        @Override
        public void onClick(View v) {
            BehindTheLayoutFragment nextFrag= new BehindTheLayoutFragment();
            this.getFragmentManager().beginTransaction()
                    .replace(R.id.behind_the_layout_fragment, nextFrag)
                    .addToBackStack(null)
                    .commit();


        }
    });

}


@Override
public int getItemCount() {
    return superHeroes.size();
}

class ViewHolder extends RecyclerView.ViewHolder {
    public NetworkImageView imageView1;
    public TextView textViewName1;
    public TextView textViewName2;
    public TextView textViewRank;
    public TextView textViewRealName;
    public TextView textViewCreatedBy;
    public TextView textViewFirstAppearance;
    public TextView textViewPowers;

    public ViewHolder(View itemView) {
        super(itemView);
        imageView1 = (NetworkImageView) itemView.findViewById(R.id.thumbnail);
        textViewName1 = (TextView) itemView.findViewById(R.id.category_title_one);
        /* textViewRank= (TextView) itemView.findViewById(R.id.textViewRank);
        textViewRealName= (TextView) itemView.findViewById(R.id.textViewRealName);
        textViewCreatedBy= (TextView) itemView.findViewById(R.id.textViewCreatedBy);
        textViewFirstAppearance= (TextView) itemView.findViewById(R.id.textViewFirstAppearance);
        textViewPowers= (TextView) itemView.findViewById(R.id.textViewPowers);
        */
    }
}

Answer 1

必须在不在getFragmentManager上的activity实例上调用{p> RecyclerViewDataAdapter。

将此类用作Activity中的内部类，或使用您在RecyclerViewDataAdapter的构造函数中传递的引用来获取片段管理器

Answer 2

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

recycleListener mListener;
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.imageView1.setOnClickListener(new View.OnClickListener() {
    public Activity context;
    @Override
    public void onClick(View v) {
      mListener.onClick();

    }
});


 public interface recycleListener
 {
  void onClick();
 }


}




  public class MyActivity extends AppCompatActivity implements RecyclerViewDataAdapter.recycleListener
  {

  public void onClick()
  {
 BehindTheLayoutFragment nextFrag= new BehindTheLayoutFragment();
        this.getFragmentManager().beginTransaction()
                .replace(R.id.behind_the_layout_fragment, nextFrag)
                .addToBackStack(null)
                .commit();

  }

   }

Answer 3

注意事项!!

1。）在活动上下文中调用getFragment manager，而在片段上下文中调用getChildFragmentManager

2。）这是指父类。在适配器类中，这将引用适配器类，因此您无法执行

this.getFragmentManager().beginTransaction()
                .replace(R.id.behind_the_layout_fragment, nextFrag)
                .addToBackStack(null)
                .commit();

为什么呢？如第1点所述.getFragmentManager被称为onactivity context。但是，嘿，你已经在适配器中传递了上下文。所以简单地做

context.getFragmentManager().beginTransaction()
                    .replace(R.id.behind_the_layout_fragment, nextFrag)
                    .addToBackStack(null)
                    .commit();

如何打开片段OnClickListener

3 个答案: