我想移动名为DisplayItem
这是activity1代码：
package com.example.eranp.clientpage;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import java.io.Serializable;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
public class Main2Activity extends Activity implements Serializable{
private EditText pro_device_det;
private Button saveDataBase, btnViewAll ;
private DatabaseReference databaseCustomer, databaseDevice, databaseProblem, db;
private Spinner spinner;
private String option1, option2,option3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main3);
db = FirebaseDatabase.getInstance().getReference();
databaseCustomer = FirebaseDatabase.getInstance().getReference("customer");
databaseDevice = FirebaseDatabase.getInstance().getReference("device");
databaseProblem = FirebaseDatabase.getInstance().getReference("problem");
option1 = getResources().getString(R.string.option1u);
option2 = getResources().getString(R.string.option2u);
option3 = getResources().getString(R.string.option3u);
saveDataBase = (Button) findViewById(R.id.save_btn);
btnViewAll = (Button)findViewById(R.id.button_viewAll);
final List<String> list = new ArrayList<String>();
list.add(option1);
list.add(option2);
list.add(option3);
final ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
pro_device_det = (EditText) findViewById(R.id.pro_device_det);
final Intent intent = getIntent();
final String fName = intent.getStringExtra("fName");
final String lName = intent.getStringExtra("lName");
final String phone = intent.getStringExtra("phone");
final String email = intent.getStringExtra("email");
final String modelDevice = intent.getStringExtra("modelDevice");
final String nameDevice = intent.getStringExtra("nameDevice");
saveDataBase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String proDeviceDet = pro_device_det.getText().toString().trim();
String shortProDeviceDet = string3Words(proDeviceDet);
DateFormat df = new SimpleDateFormat("d MMM yyyy, HH:mm");
String date = df.format(Calendar.getInstance().getTime());
if (!TextUtils.isEmpty(proDeviceDet)) {
String id = databaseCustomer.push().getKey();
Customer customer = new Customer(id, fName, lName, email, phone);
databaseCustomer.child(id).setValue(customer);
Device device = new Device(id, nameDevice, modelDevice);
databaseDevice.child(id).setValue(device);
int urgency = spinnerUrgency(spinner);
Problem problem = new Problem(id, date, proDeviceDet, urgency, shortProDeviceDet);
databaseProblem.child(id).setValue(problem);
DisplayItem[] displayItem= new DisplayItem[]{customer, problem};
final int REQ_CODE = 1;
Intent intent2 = new Intent(Main2Activity.this, CustomersPage.class);
intent2.putExtra("DisplayItem",displayItem);
startActivity(intent2);
Toast.makeText(Main2Activity.this , "Customer added", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(Main2Activity.this, "Please write on an empty cell", Toast.LENGTH_LONG).show();
}
}
});
}
});
}
}
接口代码：
package com.example.eranp.clientpage;
import java.io.Serializable;
/**
* Created by Eran P on 15/04/2018.
*/
public interface DisplayItem extends Serializable {
}
这是我要移动界面的第二个活动代码：
package com.example.eranp.clientpage;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class CustomersPage extends Activity {
ListView listViewCustomers;
List<Customer> customers;
List<Problem> problems;
List<Device> devices;
DatabaseReference databaseCustomers, databaseProblem, databaseDevice,db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customers_page);
db = FirebaseDatabase.getInstance().getReference();
databaseCustomers = FirebaseDatabase.getInstance().getReference("customer");
databaseProblem = FirebaseDatabase.getInstance().getReference("problem");
databaseDevice = FirebaseDatabase.getInstance().getReference("device");
listViewCustomers = (ListView)findViewById(R.id.listViewCostumers);
customers = new ArrayList<>();
devices = new ArrayList<>();
problems = new ArrayList<>();
Intent intentl = getIntent();
listViewCustomers.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
Customer customer = customers.get(i);
showUpdateDeleteDialog(customer.getCustomerId(), customer.getfName() + " " + customer.getlName());
return true;
}
});
listViewCustomers.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Customer customer = customers.get(i);
Problem problem = problems.get(i);
Device device = devices.get(i);
Intent intent = new Intent(CustomersPage.this, ClientPageData.class);
intent.putExtra("fName", customer.getfName());
intent.putExtra("lName", customer.getlName());
intent.putExtra("phone", customer.getPhoneNum());
intent.putExtra("email", customer.geteMail());
intent.putExtra("problemShort", problem.getProDeviceDet());
intent.putExtra("nameDevice", device.getDeviceName());
intent.putExtra("modelDevice", device.getDeviceModel());
startActivity(intent);
}
});
}
private void showUpdateDeleteDialog(final String customerId, String customerName) {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.update_dialog, null);
dialogBuilder.setView(dialogView);
final EditText editTextFName = (EditText) dialogView.findViewById(R.id.ET_fName);
final EditText editTextLName = (EditText) dialogView.findViewById(R.id.ET_lName);
final EditText editTextPhone = (EditText) dialogView.findViewById(R.id.ET_phone);
final EditText editTextEmail = (EditText) dialogView.findViewById(R.id.ET_email);
final EditText editTextProDetDev = (EditText) dialogView.findViewById(R.id.ET_proDetDevice);
final Button buttonUpdate = (Button) dialogView.findViewById(R.id.buttonUpdateArtist);
final Button buttonDelete = (Button) dialogView.findViewById(R.id.buttonDeleteArtist);
dialogBuilder.setTitle(customerName);
final AlertDialog b = dialogBuilder.create();
b.show();
buttonUpdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String fName = editTextFName.getText().toString().trim();
String lName = editTextLName.getText().toString().trim();
String phone = editTextPhone.getText().toString().trim();
String email = editTextEmail.getText().toString().trim();
String proDetDevice = editTextProDetDev.getText().toString().trim();
if (!TextUtils.isEmpty(fName)) {
updateCustomer(customerId, fName, lName,phone,email, proDetDevice);
b.dismiss();
}
}
});
buttonDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
deleteCustomer(customerId);
}
});
}
private boolean deleteCustomer(String id) {
//getting the specified Customer reference
DatabaseReference dR = FirebaseDatabase.getInstance().getReference("customer").child(id);
DatabaseReference dRP = FirebaseDatabase.getInstance().getReference("device").child(id);
DatabaseReference dRD = FirebaseDatabase.getInstance().getReference("problem").child(id);
//removing Customer
dR.removeValue();
dRP.removeValue();
dRD.removeValue();
Toast.makeText(getApplicationContext(), "Customer Deleted", Toast.LENGTH_LONG).show();
return true;
}
private boolean updateCustomer(String id, String fName, String lName, String phone, String email, String proDetDevice) {
//getting the specified artist reference
DatabaseReference dR = FirebaseDatabase.getInstance().getReference("customer").child(id);
DatabaseReference dRp = FirebaseDatabase.getInstance().getReference("problem").child(id);
//updating artist
Customer customer= new Customer(id, fName, lName, email,phone);
dR.setValue(customer);
DateFormat df = new SimpleDateFormat("d MMM yyyy, HH:mm");
String date = df.format(Calendar.getInstance().getTime());
String shortProDeviceDet = string3Words(proDetDevice);
Problem problem= new Problem(id, date,proDetDevice,0, shortProDeviceDet );
dRp.setValue(problem);
Toast.makeText(getApplicationContext(), "Customer Updated", Toast.LENGTH_LONG).show();
return true;
}
//attaching value event listener
databaseCustomers.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
//clearing the previous artist list
customers.clear();
//iterating through all the nodes
for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
//getting customer
Customer customer = postSnapshot.getValue(Customer.class);
//adding customer to the list
customers.add(customer);
}
Intent intent2 = getIntent();
DisplayItem [] displayItem = (DisplayItem[]) intent2.getExtras().getSerializable("DisplayItem");
//creating adapter
CustomerAdapter customerAdapter = new CustomerAdapter(CustomersPage.this,displayItem );
//attaching adapter to the listview
listViewCustomers.setAdapter(customerAdapter);
}
}
当我试图运行应用程序时崩溃并在日志文件中他说错误在这一行：
DisplayItem [] displayItem = (DisplayItem[])
intent2.getExtras().getSerializable("DisplayItem");
非常感谢您的帮助！
答案 0 :(得分：0)
您的代码不太清楚，但请尝试使用以下格式：
//When you want to pass an array as intent:
private ArrayList<String> arrayList = new ArrayList<String>();
Intent intent = new Intent();
intent.putStringArrayListExtra("data", arrayList);
startActivity(intent);
// To receive intent in the second activity
private ArrayList<String> newArrayList = new ArrayList<String>();
newArrayList = getIntent.getStringArrayListExtra("data");
答案 1 :(得分：0)
检查您的类Device和Customer是否实现了可序列化