[英]How can pass data from Adapter to Fragment?
如何在adapter
和fragment
之间传递数据?
我的适配器:
finalHolder.spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
finalHolder.spinner.setSelection(position);
selState = finalHolder.spinner.getSelectedItem().toString();
System.out.println(selState);
Toast.makeText(getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();
Fragment fragment = new Fragment();
Bundle bundle = new Bundle();
bundle.putString("key", selState);
Log.i("BUNDLE", bundle.toString());
fragment.setArguments(bundle);
}
});
我的片段:
public class MyListFragment extends Fragment{
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list2, container, false);
/*Bundle bundle = this.getArguments();
String strtext = bundle.getString("key", " ");
System.out.println(strtext);*/
System.out.println("prima ancora");
Bundle arguments = this.getArguments();
System.out.println("prima");
if (arguments != null) {
System.out.println("dopo");
//String userId = arguments.getString("key");
//System.out.println("finalmente:"+userId);
user = getArguments().getString("Key");
}
}
您可以使用接口将数据从适配器传递到片段,通常,您可以在这里找到它: Java - 接口
在您的情况下,您可以实现这样的接口:
Public Interface YourInterfaceName{
void onItemSelected(String key, String Value);
}
在您的片段中,您必须实现您的接口:
public class YourFragment extends Fragment implements YourInterface
{
YourAdapter.setOnItemSelected(this);
}
和适配器中的 finlay 执行以下操作:
public class Adapter
{
public void setOnItemSelected(YourInterface yourIntrface)
{
this.yourIntrface = yourIntrface;
}
.......
finalHolder.spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
.....
//instead of creating instance of fragment do this:
yourInterface.onItemSelected(yourKey, value);
}
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