Question

我正在使用nav drawer。所以我需要从Fragment开始Activity我开始另一个Activity，其中我有ListView，点击我必须保存数据。

保存后，我需要返回保存数据必须显示的Fragment。这是我的Fragment

public class ArmoryFragment extends Fragment {

public ArmoryFragment(){}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_armory, container, false);
    Button button = (Button) rootView.findViewById(R.id.button_rifles);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(getActivity(), Rifles.class);
            startActivity(intent);
        }
    });
    return rootView;
}
}

这是我需要返回的活动

public class Rifles extends Activity implements View.OnClickListener, OnItemSelectedListener {
DatabaseHelper db;
String BrandModel;
private RifleDAO rifleDAO;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.rifles);
    initList();
    this.rifleDAO = new RifleDAO(this);

    ListView listView = (ListView) findViewById(R.id.listView1);
    SimpleAdapter simpleAdapter = new SimpleAdapter(this, riflesList, android.R.layout.simple_list_item_1, new String[] {"rifle"}, new int[] {android.R.id.text1});
    listView.setAdapter(simpleAdapter);

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                                long id) {
            String item = ((TextView)view).getText().toString();
            Toast.makeText(getBaseContext(), item, Toast.LENGTH_LONG).show();
            BrandModel= ((TextView)view).getText().toString();
            String[] parts=BrandModel.split(" ");
            String Brand=parts[0];
            String Model = parts[1];
     // need to return from somewhere here

        }

    });
} next is parser code... supose it is not needed

那么如何从Activity返回Fragment？

Answer 1

好吧，如果你想保存数据，我更喜欢将数据添加到数据库中的表中（显然你有一个databaseHelper类，所以让你拥有自己的表），当你从你的活动回来时，你需要额外的位置和打电话：

selectItem(mCurrentSelectedPosition);

所以mCurrentSelectedPosition是您想要选择的片段的位置。

从Activity启动片段或保存数据并返回上一个片段

1 个答案: