android - 如何在 bindView 方法的匿名内部类中获取 FragmentActivity 引用？

Question

我试图在 CursorAdapter 中的 bindView 方法的匿名内部类中获取 FragmentActivity 引用。实际上，当在我的 ListView 中单击 ImageView 时，我试图创建一个 DialogFragment，并与 SimpleCursorAdapter 连接。

@Override
    public void bindView(View view, Context context, Cursor c) {
        super.bindView(view, context, c);

        ImageView geoEditIcon = (ImageView)view.findViewById(R.id.li_cdf_icon_geoedit);
        geoEditIcon.setImageResource(R.drawable.geolist_edit);
        geoEditIcon.setTag(c.getString(c.getColumnIndex(DBConstants.ID)));

        geoEditIcon.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
              Log.i("geolist", "geoEditIcon clicked");
              String selectedGeoID = v.getTag().toString();
              Log.i("geolist", "geoEditIcon selected Id->"+selectedGeoID);

              EditGeofenceFragment editGeofenceFragment = new EditGeofenceFragment(v.getContext(),selectedGeoID);
              //what context i want to use in Show method
              editGeofenceFragment.show(getActivity().getSupportFragmentManager(), "editGeofenceFragment");
            }
        });
    }

更新:

我已将 getSupportFragmentManager 引用传递给 MySimpleCursorAdapter 的构造函数，并在我的匿名内部类中使用它。这是我的 Dialog fragment 显示方法。现在它工作正常。我在下面更新了我的代码。

public MySimpleCursorAdapter(Context context, FragmentManager fragmentManager, int layout, Cursor c,String[] from, int[] to, int flags) {
        super(context, layout, c, from, to, flags);
        this.context=context;
        this.fragmentManager=fragmentManager;
    }


    @Override
    public void bindView(View view, Context context, Cursor c) {
        super.bindView(view, context, c);

        ImageView geoEditIcon = (ImageView)view.findViewById(R.id.li_cdf_icon_geoedit);
        geoEditIcon.setImageResource(R.drawable.geolist_edit);
        geoEditIcon.setTag(c.getString(c.getColumnIndex(DBConstants.ID)));

        geoEditIcon.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
              Log.i("geolist", "geoEditIcon clicked");
              String selectedGeoID = v.getTag().toString();
              Log.i("geolist", "geoEditIcon selected Id->"+selectedGeoID);

              EditGeofenceFragment editGeofenceFragment = new EditGeofenceFragment(v.getContext(),selectedGeoID);
              // Put fragmentManager in first parameter to show method.
              editGeofenceFragment.show(fragmentManager, "editGeofenceFragment");
            }
        });
    }

Answer 1

由于您正在尝试获取对 FragmentManager 的引用，因此您可以在 中保存对 FragmentActivity 的 final 引用>SimpleCursorAdapter，并将其传递给 SimpleCursorAdapter 的构造函数。

private final FragmentActivity mFragmentActivity;

public YourSimpleCursorAdapter(Context context, FragmentActivity fragmentActivity) {
    // Deprecated in API 11, needed on < API 11 devices
    super(context, null);

    mFragmentActivity = fragmentActivity;
}

然后在您的匿名内部类中使用该引用来获取您的 FragmentManager。

editGeofenceFragment.show(mFragmentActivity.getSupportFragmentManager(), "editGeofenceFragment");