需要专家的意见,我应该如何组织这个问题。我有一个自定义方法process_filter驻留在一个片段中,因为它需要访问这个片段的私有TextView
和List
。
在处理过程中,此片段将访问BaseAdapter
,并且在此BaseAdapter
中,我需要使用back process_filter方法
基本结构如下:
MyFragment.java
public class MyFragment extends Fragment {
private List<String> filter_list;
private TextView no_of_filter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.my_fragment_layout, container, false);
no_of_filter = (TextView) view.findViewById(R.id.no_of_filter_tv);
.
MyAdapter custom_adapter = new MyAdapter(context, "string 1", "string 2");
.
process_filter("string 1", "string 2");
.
}
public void process_filter(String in_preference, String current_value)
{
no_of_filter.setText(in_preference);
}
MyAdapter.java
class MyAdapter extends BaseAdapter {
public View getView( final int position, View convertView, ViewGroup parent)
{
holder.checkBox.setOnClickListener( new View.OnClickListener() {
public void onClick(View v) {
//Here I need to access back process_filter from fragment
process_filter ("string 1, string 2");
}
}
}
}
创建一个从适配器到片段的接口。
在适配器中创建接口并将其传递给适配器的构造函数
class MyAdapter extends BaseAdapter {
public interface IProcessFilter {
void onProcessFilter(String string1, String string2)
}
private IProcessFilter mCallback;
public MyAdapter(Context context, String string1, String string2, IProcessFilter callback) {
mCallback = callback;
}
public View getView( final int position, View convertView, ViewGroup parent)
{
holder.checkBox.setOnClickListener( new View.OnClickListener() {
public void onClick(View v) {
mCallback.onProcessFilter("string1", "string2");
}
}
}
}
最后,像这样在你的片段中实现它
public class MyFragment extends Fragment implements IProcessFilter {
...
...
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.my_fragment_layout, container, false);
no_of_filter = (TextView) view.findViewById(R.id.no_of_filter_tv);
MyAdapter custom_adapter = new MyAdapter(context, "string 1", "string 2", this);
}
@Override
public void onProcessFilter(String string1, String string2) {
// Process the filter
}
}
抱歉回复晚了,可能对新手有用
注: @Marko的答案是完美的,但它需要一个小的变化,在初始化适配器与参数。
步骤1:创建监听器接口
Public interface AdapterListener{
Public void myListener();
}
步骤2:在Fragment类中实现你的接口。
public class MyFragment extends Fragment implements AdapterListener{
@Override
public void myListener(){
//Do what you want
}
步骤3:初始化MyFragment
类中的适配器类
MyFragmentAdapter myfragmentAdapter=new MyFragmentAdapter(MyFragment.this);
步骤4:在适配器类中初始化侦听器。
public class MyFragmentAdapter extends Adapter<Your Code Related>{
private AdapterListener adapterListener;
public MyFragmentAdapter(AdapterListener adapterListener){
this.adapterListener=adapterListener;
}