Android - 无法解析getSupportFragmentManager的符号

Question

这是我的ItemAdapter的代码,我以这种方式用作列表的适配器.

list.setAdapter(new ItemAdapter(thisContext,imageUrl));

我正在尝试为按钮添加onclick侦听器,该按钮将向ListFragment添加项目.当我编译时,它说"无法解析符号getSupportFragmentManager".见下面的粗体.但我很确定我导入了android.support.v4.app.FragmentActivity(见下文).我在我的主要活动中使用了相同的getSupportFragmentManager,它可以工作.我不明白为什么不在这里.如果不是,我应该如何获取HeadlinesFragment以便我可以添加到该片段中的列表？

感谢我能得到的任何帮助.

码头.

package com.suite.android.menu;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
**import android.support.v4.app.FragmentActivity;**


public class ItemAdapter extends BaseAdapter {

private Context itemPageContext;
private String imagesUrl[];
private static final String TAG = "ItemAdapter" ;

public ItemAdapter(Context c, String[] imageUrl)
{
   super();
   itemPageContext = c;
   imagesUrl = imageUrl.clone();  // copy over


}

private LayoutInflater getLayoutInflater()
{
    return (LayoutInflater) itemPageContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

public View getView(final int position, View convertView, ViewGroup parent)
{
    // all this is for 1 item in the list

    View theView = convertView;
    final ViewHolder holder;
    if (convertView == null) {
        theView = getLayoutInflater().inflate(R.layout.item_list_image, null);
        holder = new ViewHolder();
        holder.text = (TextView) theView.findViewById(R.id.foodTitle);
        holder.image = (ImageView) theView.findViewById(R.id.foodImage);
        holder.button = (Button) theView.findViewById(R.id.addOrderButton);
        theView.setTag(holder);
    } else
        holder = (ViewHolder) theView.getTag();

    holder.text.setText("Item " + position);
    holder.image.setImageResource(R.drawable.ic_launcher);

    holder.button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            **HeadlinesFragment headFragment = (HeadlinesFragment) getSupportFragmentManager().findFragmentById(R.id.headlines_fragment);**
            headFragment.AddItem("One");
            Log.d(TAG, "Added Item!");
        }
    });

    return theView;
}

private class ViewHolder {
    public TextView text;
    public ImageView image;
    public Button button;
}

@Override
public int getCount() {
    return imagesUrl.length;
}

@Override
public Object getItem(int position) {
    return position;
}

@Override
public long getItemId(int position) {
    return position;
}

}

Answer 1

自从我玩碎片以来已经有一段时间了.但我相信你只能从FragmentActivity类访问getSupportedFragmentManager.

试试这个

public ItemAdapter(Context c,FragmentActivity activity, String[] imageUrl)
{
   super();
   itemPageContext = c;
   this.activity = activity;
   imagesUrl = imageUrl.clone();  // copy over
}

然后在扩展FragmentActivity的类中执行此操作:

list.setAdapter(new ItemAdapter(thisContext,thisActivity, imageUrl));

然后在适配器内执行此操作

activity.getSupportedFragmentManager...

希望这可以帮助