从扩展RecyclerView.ViewHolder的类启动DialogFragment

Question

我在recyelerview.viewholder类的onClick()方法中尝试了如下.

示例中使用的SampleDialogFragment扩展了DialogFragment.

@Override
public void onClick(View v)
{
SampleDialogFragment df= new SampleDialogFragment();
df.show(v.getContext().getSupportFragmentManager(), "Dialog");
}

我正面临着问题v.getContext().getSupportFragmentManager().我无法调用getSupportFragmentManager().

我也试过如下.

@Override
public void onClick(View v)
{
SampleDialogFragment df= new SampleDialogFragment();
SampleActivity activity = new SampleActivity();
df.show(activity.getSupportFragmentManager(), "Dialog");
}

SampleActivity是回收器视图附加的活动.它没有显示错误.当我运行应用程序并崩溃.

日志显示活动已经破坏.

有解决方案吗

Answer 1

正确的方法是使用接口.

public interface OnItemClickListener {
    void onItemClicked(View v);
}

并在触发onClick方法时调用接口方法.

public class YourListAdapter extends RecyclerView.Adapter<...>

//your code
private OnItemClickListener listener;

public YourListAdapter(OnItemClickListener listener /*your additional parameters*/) {
    this.listener = listener;
    //...
}

@Override
public void onClick(View v){    
    listener.onItemClicked(View v);
}
}

您必须从中传递OnItemClickListener接口实例SampleActivity

并让它在你的实现它 SampleActivity

public class SampleActivity extends FragmentActivity implements OnItemClickListener {

    @Override
    public void onItemClicked(View v) {
        SampleDialogFragment df= new SampleDialogFragment();
        df.show(getSupportFragmentManager(), "Dialog");
    }
}