接口回调

来源：互联网发布：crossover破解版mac 编辑：程序博客网时间：2024/05/20 04:10

布局

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:orientation="horizontal"    android:layout_height="match_parent">    <fragment        android:id="@+id/fragment1"        android:name="zhengshuai.baway.com.myapplicationabc.Fragment1"        android:layout_width="0dp"        android:layout_height="match_parent"        android:layout_weight="1"        android:background="@android:color/holo_red_light"></fragment>    <fragment        android:id="@+id/fragment2"        android:name="zhengshuai.baway.com.myapplicationabc.Fragment2"        android:layout_width="0dp"        android:layout_height="match_parent"        android:layout_weight="1"        android:background="@android:color/holo_green_light"></fragment></LinearLayout>

<ListView    android:id="@+id/lv"    android:layout_width="match_parent"    android:layout_height="match_parent"></ListView>

<TextView    android:id="@+id/tv"    android:layout_width="wrap_content"    android:layout_height="wrap_content"/>

public class Fragment1 extends Fragment {    private ListView lv;    private List<String> list = new ArrayList<>();    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.fragment1, null);        getData();        //找控件        initView(view);        return view;    }    private void getData() {        for (int i = 0; i < 10; i++) {            list.add("条目：" + i);        }    }    private void initView(View view) {        lv = (ListView) view.findViewById(R.id.lv);        ArrayAdapter adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, list);        lv.setAdapter(adapter);        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                if (listener != null) {                    listener.onFragmentClick(list.get(position));                }            }        });    }    //声明一个接口    private OnFragmentClickListener listener;        //定义接口 方法    public interface OnFragmentClickListener {        void onFragmentClick(String item);    }    //对外提供一个访问的方法    public void setOnFragmentClickListener(OnFragmentClickListener listener) {        this.listener = listener;    }}

public class Fragment2 extends Fragment {    private TextView tv;    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.fragment2, null);        //找控件        initView(view);        return view;    }    private void initView(View view) {        tv = (TextView) view.findViewById(R.id.tv);        //fragment管理器        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();        //得到Fragment1        Fragment1 fragment1 = (Fragment1) fragmentManager.findFragmentById(R.id.fragment1);        //实现点击事件        fragment1.setOnFragmentClickListener(new Fragment1.OnFragmentClickListener() {            @Override            public void onFragmentClick(String item) {                tv.setText("接口回调：" + item);            }        });    }}

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