Fragment之间的数据互传

2019-11-08 00:17:45

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public class LeftFragment extends Fragment { String[] menus = new String[]{"Android", "IOS", "WP"}; PRivate OnClickItem onClickItem; public LeftFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view= inflater.inflate(R.layout.fragment_left, container, false); ListView lv= (ListView) view.findViewById(R.id.lv_menu); ArrayAdapter adapter=new ArrayAdapter(getActivity(),android.R.layout.simple_list_item_1,menus); lv.setAdapter(adapter); lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) {// MainActivity activity= (MainActivity) getActivity();// activity.setContent(menus[position]); if (onClickItem != null) { onClickItem.setText(menus[position]); } } }); return view; } //自定义接口 public interface OnClickItem{ void setText(String msg); }public class RightFragment extends Fragment { private TextView tv_content; public RightFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view=inflater.inflate(R.layout.fragment_right, container, false); tv_content= (TextView) view.findViewById(R.id.tv_content); return view; } public void set_content(String msg){ tv_content.setText(msg); }public class MainActivity extends AppCompatActivity implements LeftFragment.OnClickItem{ private RightFragment rfg; private LeftFragment lfg; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); rfg= (RightFragment) getSupportFragmentManager().findFragmentById(R.id.fr_right); lfg = (LeftFragment) getSupportFragmentManager().findFragmentById(R.id.fr_left); //初始化LeftFragment 调用LeftFragment的set方法 }// public void setContent(String msg){// rfg.set_content(msg);// } @Override public void setText(String msg) { rfg.set_content(msg); }

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