在View Pager中的片段之间传递数据需要帮助！我们尝试在Fragments中将数据作为bundle传递。在Fragment.getInstance（）方法内部并尝试从其他Fragment.getArguments（）获取数据。
活动代码
package com.northerly.bumpr;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import com.northerly.bumpr.Fragment.EnterOtp;
import com.northerly.bumpr.Fragment.MobileNumber;
import com.northerly.bumpr.utils.NonSwipeableViewPager;
public class LoginActivity extends AppCompatActivity {
public static NonSwipeableViewPager mPager;
PagerAdapter mPagerAdapter;
private static final int NUM_PAGES = 2;
public static Bundle myBundle = new Bundle();
public static TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mPager = (NonSwipeableViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
mPager.setOffscreenPageLimit(0);
mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// When changing pages, reset the action bar actions since they are dependent
// on which page is currently active. An alternative approach is to have each
// fragment expose actions itself (rather than the activity exposing actions),
// but for simplicity, the activity provides the actions in this sample.
invalidateOptionsMenu();
}
});
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return MobileNumber.newInstance();
case 1:
return EnterOtp.newInstance();
}
return MobileNumber.newInstance();
}
@Override
public int getCount() {
return NUM_PAGES;
}
}
}
片段代码：
package com.northerly.bumpr.Fragment;
import android.app.Dialog;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.net.nsd.NsdManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.support.annotation.IntRange;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.Toast;
import com.northerly.bumpr.HomeActivity;
import com.northerly.bumpr.LoginActivity;
import com.northerly.bumpr.R;
import com.northerly.bumpr.common.ConnectionDetector;
import com.northerly.bumpr.common.OfferInfoChild;
import com.northerly.bumpr.common.OfferInfoGroup;
import com.northerly.bumpr.utils.DBHandler;
import com.northerly.bumpr.utils.GarageGetterSetter;
import com.northerly.bumpr.utils.GlobalData;
import com.northerly.bumpr.utils.PreferenceConnector;
import com.northerly.bumpr.utils.Webservice;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import static android.R.id.list;
public class MobileNumber extends Fragment {
Button cont;
EditText ph_no;
ConnectionDetector detector;
FrameLayout mobil_num_lay;
public static String mobile;
private OnFragmentInteractionListener mListener;
public MobileNumber() {
}
public static MobileNumber newInstance() {
MobileNumber fragment = new MobileNumber();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_mobile_number, container, false);
cont = (Button) rootView.findViewById(R.id.cont);
ph_no = (EditText) rootView.findViewById(R.id.s_ph);
mobil_num_lay=(FrameLayout)rootView.findViewById(R.id.mobile_number_lay);
detector=new ConnectionDetector(getActivity());
cont.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (ph_no.getText().toString().length()!=0 && ph_no.getText().toString().length()!=10)
{
final Snackbar snackbar = Snackbar.make(mobil_num_lay, "Please Enter a valid Mobile Number", Snackbar.LENGTH_SHORT);
snackbar.setAction("Dismiss", new View.OnClickListener() {
@Override
public void onClick(View view) {
snackbar.dismiss();
}
});
// Changing message text color
snackbar.setActionTextColor(getResources().getColor(R.color.colorAccent));
snackbar.show();
} else {
mobile="+91"+ph_no.getText().toString();
if (detector.isConnectingToInternet()) {
new AsyncLogin(getActivity()).execute();
} else {
Toast.makeText(getActivity(), getResources().getString(R.string.internet_connection_exception),
Toast.LENGTH_SHORT).show();
}
}
// GoSignUp.myBundle.putString("Timer","on");
}
});
return rootView;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
public void timerOn() {
new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
LoginActivity.tv.setText("0:" + millisUntilFinished / 1000);
}
public void onFinish() {
LoginActivity.tv.setText(getResources().getString(R.string.resend_otp));
}
}.start();
}
public class AsyncLogin extends AsyncTask<String, String, Void> {
String response;
Dialog dialog;
private final WeakReference<FragmentActivity> mainActivityWeakRef;
public AsyncLogin(FragmentActivity mainActivity) {
super();
this.mainActivityWeakRef = new WeakReference<>(mainActivity);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
if (mainActivityWeakRef.get() != null && !mainActivityWeakRef.get().isFinishing()) {
dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.custom_dialog);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.show();
}
}
protected Void doInBackground(String... args) {
try {
JSONStringer userJson = null;
// userJson = new JSONStringer().object().key(GlobalData.user_id)
// .value(PreferenceConnector.readString(getActivity(), PreferenceConnector.USER_ID, ""))
// .endObject();
userJson = new JSONStringer().object().key(GlobalData.username)
.value(mobile)
.endObject();
String url = GlobalData.serverName + GlobalData.user_status;
response = Webservice.PostDataAlter(url, userJson);
} catch (Exception e) {
e.getMessage();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
//Below code is added to avoid Fragment not attached to activity error
if(isAdded()){
getResources().getString(R.string.app_name);
}
Log.d((mainActivityWeakRef.get() != null) + "", "onPostexecute");
if (mainActivityWeakRef.get() != null && !mainActivityWeakRef.get().isFinishing()) {
if (dialog.isShowing()) {
/* Dismiss the progress dialog after sharing */
dialog.dismiss();
}
ArrayList<OfferInfoGroup> GrpList = new ArrayList<OfferInfoGroup>();
try {
System.out.println("response "+ response.toString());
JSONObject jsonobj = new JSONObject(response);
String UserDetails = jsonobj.getString(getResources().getString(R.string.response_status));
System.out.println("Hi"+UserDetails);
if (UserDetails.equals(getResources().getString(R.string.response_register)))
{
// String otp_verify=jsonobj.getString(getResources().getString(R.string.verify_otp));
// PreferenceConnector.writeString(getActivity(),PreferenceConnector.OTP_VERIFY,otp_verify);
String result1 = jsonobj.getString(getResources().getString(R.string.response_results));
JSONArray arr = new JSONArray(result1);
String result2 = jsonobj.getString(getResources().getString(R.string.response_results2));
JSONArray arr2 = new JSONArray(result2);
String result3 = jsonobj.getString(getResources().getString(R.string.response_results3));
JSONArray arr3 = new JSONArray(result3);
System.out.println("Hello"+arr);
for (int i=0;i<arr.length();i++)
{
String userid = arr.getJSONObject(i).getString(GlobalData.reg_id);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.USER_ID,userid);
String name=arr.getJSONObject(i).getString(GlobalData.name);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.USER_NAME,name);
String email =arr.getJSONObject(i).getString(GlobalData.email);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.USER_EMAIL,email);
String mobile=arr.getJSONObject(i).getString(GlobalData.username);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.USER_PHONE,mobile);
String city=arr.getJSONObject(i).getString(GlobalData.city);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.USER_CITY,city);
}
System.out.println("Results 2"+result2);
System.out.println("Array 2"+arr2);
for (int j=0;j<arr2.length();j++)
{
String id = arr2.getJSONObject(j).getString(GlobalData.Vehicle_id);
String user_id = arr2.getJSONObject(j).getString(GlobalData.user_id);
String brand = arr2.getJSONObject(j).getString(GlobalData.brand);
String model = arr2.getJSONObject(j).getString(GlobalData.model);
String type = arr2.getJSONObject(j).getString(GlobalData.type);
String fuel_type = arr2.getJSONObject(j).getString(GlobalData.fuel_type);
String reg_no = arr2.getJSONObject(j).getString(GlobalData.reg_no);
String year = arr2.getJSONObject(j).getString(GlobalData.year);
String km_driven = arr2.getJSONObject(j).getString(GlobalData.km_driven);
String variant = arr2.getJSONObject(j).getString(GlobalData.variant);
DBHandler db = new DBHandler(getActivity());
/* "user_id": "20666",
"vehicle_id": "170",
"brand": "Hero MotoCorp",
"model": "Xtreme (2014)",
"type": "2w",
"fuel_type": "PETROL",
"year": "2014",
"km_driven": "17240",
"variant": ""*/
db.insert_all(Integer.parseInt(user_id), Integer.parseInt(id),brand,model,type,fuel_type,reg_no,km_driven,year,variant);
ArrayList<GarageGetterSetter> lis = db.getAllVehicles();
System.out.println(lis);
}
for (int k=0;k<arr3.length();k++)
{
String otp_verify=arr3.getJSONObject(k).getString(GlobalData.verify_otp);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.OTP_VERIFY,otp_verify);
}
LoginActivity.mPager.setCurrentItem(LoginActivity.mPager.getCurrentItem() + 1);
}
else if (UserDetails.equals(getResources().getString(R.string.response_new_user))){
String result1 = jsonobj.getString(getResources().getString(R.string.response_results));
JSONArray arr = new JSONArray(result1);
String result2 = jsonobj.getString(getResources().getString(R.string.response_results2));
JSONArray arr2 = new JSONArray(result2);
String result3 = jsonobj.getString(getResources().getString(R.string.response_results3));
JSONArray arr3 = new JSONArray(result3);
for (int k=0;k<arr3.length();k++)
{
String otp_verify=arr3.getJSONObject(k).getString(GlobalData.verify_otp);
PreferenceConnector.writeString(getActivity(),PreferenceConnector.OTP_VERIFY,otp_verify);
}
LoginActivity.mPager.setCurrentItem(LoginActivity.mPager.getCurrentItem() + 1);
}
// JSONArray arr2=new JSONArray(result2);
// else if (UserDetails.equals(getResources().getString(R.string.response_register))){
// }
} catch (Exception e) {
if (e.getMessage() != null) {
Toast.makeText(getActivity(), getResources().getString(R.string.AsyncException),
Toast.LENGTH_SHORT).show();
}
e.printStackTrace();
}
}
}
}
}
需要帮助在片段之间传递数据
答案 0 :(得分：0)
创建界面
在片段事务的基本活动上实现该接口
通过回调片段事务从fragment1调用此接口
通过此界面传递值
有关详细信息，请查看此https://stackoverflow.com/a/32372333/5169060
答案 1 :(得分：0)
您可以尝试通过创建一个常见的单例类来在片段之间传递数据。根据您的要求，您可以创建一个类来设置和获取数据。 下面是单例类的一个示例，可用于在片段之间传递数据
public class DataClass {
private static DataClass dataObject = null;
private DataClass() {
}
public static DataClass getInstance() {
if (dataObject == null)
dataObject = new DataClass();
return dataObject;
}
private String distributor_id;;
public String getDistributor_id() {
return distributor_id;
}
public void setDistributor_id(String distributor_id) {
this.distributor_id = distributor_id;
}
}
在您移动到下一个屏幕之前设置数据。
DataHolderClass.getInstance().setDistributor_id("your data");
并获取数据
String data = DataClass.getInstance().getDistributor_id();