安卓：从处理器

Question

访问活动我有以下处理：

public class SiteListener implements OnItemClickListener{ 
    @Override 
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) { 
    } 
} 

我希望能够调用以下：

myActivity.getSupportFragmentManager() 
      .beginTransaction() 
      .add(R.id.site_info, siteInfoFragment) 
      .commit(); 

如何获得从SiteListener活动访问？有没有办法使用adapterView？

Answer 1

您可以投FragmentActivity与view得到FragmentActivity的实例。

FragmentActivity activity = ((FragmentActivity)view.getContext()); 
activity.getSupportFragmentManager() 
      .beginTransaction() 
      .add(R.id.site_info, siteInfoFragment) 
      .commit(); 

Answer 2

当您创建活动时，将活动的引用传递给SiteListener。

编辑添加的代码示例：

public class SiteListener implements OnItemClickListener{ 
    private MyActivity myActivity; 

    public SiteListener(MyActivity myActivity) { 
     this.myActivity = myActivity; 
    } 

    @Override 
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) { 
     myActivity.getSupportFragmentManager() 
      .beginTransaction() 
      .add(R.id.site_info, siteInfoFragment) 
      .commit(); 

    } 
}