我是Android上的初学者，我已经阅读了有关此问题的几个主题，但我无法在我的应用上使用此功能。
我有两种布局：
我有两个活动：
HomeActivity，没什么特别的：
public class HomeActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
getSupportFragmentManager().beginTransaction()
.replace(R.id.home_container, new HomeFragment())
.commit();
}
}
SignsActivity，我想在旋转智能手机时保存我的值：
public class SignsActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signs);
if (savedInstanceState == null) {
SignsFragment signsFragment = new SignsFragment();
signsFragment.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction()
.replace(R.id.signs_container, signsFragment, "SIGNS_FRAGMENT_TAG")
.commit();
} else {
SignsFragment signsFragment =
(SignsFragment)getSupportFragmentManager()
.findFragmentByTag("SIGNS_FRAGMENT_TAG");
}
}
}
我有两个碎片：
HomeFragment，我想发送数据：
public class HomeFragment extends Fragment {
String language;
public HomeFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.activity_home,
container, false);
language = "french";
Button displayView = (Button) rootView.findViewById(R.id.display);
if (displayView != null) {
displayView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
EditText signView = (EditText)
rootView.findViewById(R.id.sign_number);
String signNumber = signView.getText().toString();
if (!signNumber.equals("")) {
int number = Integer.parseInt(signNumber);
Bundle bundle = new Bundle();
bundle.putString("language", language);
bundle.putInt("signNumber", number);
FragmentTransaction fragmentTransaction =
getActivity().getSupportFragmentManager()
.beginTransaction();
SignsFragment signsFragment = new SignsFragment();
signsFragment.setArguments(bundle);
fragmentTransaction.replace(R.id.signs_container,
signsFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
});
}
return rootView;
}
}
SignsFragment，我想要接收数据：
public class SignsFragment extends Fragment {
private String language;
private int signNumber;
private View rootView;
public SignsFragment() {
// Required empty public constructor
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("language", language);
outState.putInt("signNumber", signNumber);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Bundle bundle = getArguments();
if (bundle != null) {
language = bundle.getString("language");
signNumber = bundle.getInt("signNumber", 1);
} else {
if (savedInstanceState != null) {
// Restore last state
language = savedInstanceState.getString("language");
signNumber = savedInstanceState.getInt("signNumber");
} else {
language = "french";
signNumber = 1;
}
}
return inflater.inflate(R.layout.activity_signs, container,
false);
}
}
当我点击主页上的按钮时应用程序关闭，而我想要检查标志中的数据。任何人都可以帮我纠正错误吗？
提前感谢您的回答。
答案 0 :(得分：0)
我有一个片段，其中有两个Tabs，它们也是片段。所以我从一个标签移动到另一个标签并传递数据。这是代码。这完美地工作
Private Sub ShortenRepetitiveCode()
Dim Ws As Worksheet
Dim LookupRange As Range
Dim i As Integer
Set Ws = ActiveSheet
Set LookupRange = Worksheets(Ws.Cells(1, "R").Value & " Investments").Range("B58:F81")
For i = 9 To 19 Step 2 ' specify columns I to S
Ws.Cells(81, (i + 19)).Value = WorksheetFunction.VLookup(Ws.Cells(65, i).Value, LookupRange, 5, False)
Next i
End Sub
//在First Fragment中编写以下代码
// write below code in Second Fragment from where you want to pass the values to nextFragment(i-e FirstFragment)
// Write below code in OnClickListener of the button in secondFragment
if (tablayout.getTabAt(1).isSelected()) { // here one is the index number of second fragment i-e current fragment
LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getContext());
Intent i = new Intent("EDIT_TAG_REFRESH");
i.putExtra("Key1",value1);
i.putExtra("Key2",value2);
lbm.sendBroadcast(i);
}
tablayout.getTabAt(0).select(); // here 0 is the index number of first fragment i-e to whch fragment it has to move