安卓：從處理器

Question

訪問活動我有以下處理：

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

我希望能夠調用以下：

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

如何獲得從SiteListener活動訪問？有沒有辦法使用adapterView？

Answer 1

您可以投FragmentActivity與view得到FragmentActivity的實例。

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

Answer 2

當您創建活動時，將活動的引用傳遞給SiteListener。

編輯添加的代碼示例：

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(); 

    } 
}