所以我有这个节目基本上是一个生日提醒，虽然我得到了大部分的想法，但遗憾的是当我想要添加一个朋友而不是，例如，Rick J. 28,1,1980，它添加朋友[name = null，day = 0，month = 0，year = 0]
以下是添加假设的代码：
package com.example.birthdayminder;
import java.util.Date;
import java.util.GregorianCalendar;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Toast;
public class AddActivity extends ActionBarActivity {
private int year;
private int month;
private int day;
private String name;
private boolean isOK = false;
GregorianCalendar gregCal;
Date date;
FriendList friendlist;
Friend friend;
EditText text;
CharSequence charSequence;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add);
}
public void checkFriend(){
boolean duplicate = false;
for(int i = 0; i<friendlist.getList().size(); i++){
if(friendlist.getList().get(i).equals(friend) == true) {
duplicate = true;
}
}
if (name == null){
charSequence = (CharSequence)"Name is empty!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if(day == 0){
charSequence = (CharSequence)"Not a valid day!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if(month == 0){
charSequence = (CharSequence)"Not a valid month!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if(year == 0){
charSequence = (CharSequence)"Not a valid year!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
else if(duplicate==true){
Toast.makeText(this, "This person already added", Toast.LENGTH_SHORT).show();
isOK =false;
}
else {
isOK=true;
}
}
public void test(View view){
Toast.makeText(this, "testing",Toast.LENGTH_SHORT).show();
}
public void addClick(View view){
text = (EditText)findViewById(R.id.namefield);
name = findViewById(R.id.namefield).toString();
DatePicker datepick = (DatePicker)findViewById(R.id.datePicker1);
day = datepick.getDayOfMonth();
month = datepick.getMonth();
year = datepick.getYear();
friend = new Friend(name, day, month, year);
friendlist = FriendList.getInstance();
//the toast is to check if the object is added correctly
Toast.makeText(this, friend.toString(), 4).show();
checkFriend();
if(isOK==true){
friendlist.addFriend(new Friend(name, day, month, year));
finish();
}
}
// This is the original code of the adding process, i attempted to re-do it to try and see if that could help me solve the problem
// public void saveBirthday(View view){
// text = (EditText)findViewById(R.id.namefield);
//
// DatePicker datePick = (DatePicker)findViewById(R.id.datePicker1);
// name = findViewById(R.id.namefield).toString();
// day = datePick.getDayOfMonth();
// month = datePick.getMonth();
// year = datePick.getYear();
// fl = FriendList.getInstance();
// friend = new Friend(name,day,month,year);
// Toast.makeText(this, friend.toString(), 3).show();
// checkFriend();
// if(isOK==true){
// fl.addFriend(friend);
// finish();
// }
//
//
// }
}
对于应该存储对象的列表，可以在列表视图中查看它们：
package com.example.birthdayminder;
import java.util.ArrayList;
public class FriendList {
ArrayList<Friend> friendList = new ArrayList<Friend>();
private static FriendList instance = null;
protected FriendList(){
//prevents accidental creation of new instances
}
public static FriendList getInstance(){
if(instance == null){
instance = new FriendList();
}
return instance;
}
//Removes an entry and ads it to the end of the list
public void moveToEnd(int friendNo){
Friend chosenFriend =friendList.get(friendNo);
friendList.remove(friendNo);
friendList.add(chosenFriend);
}
public boolean addFriend(Friend friend){
return friendList.add(friend);
}
public ArrayList getList(){
return friendList;
}
@Override
public String toString() {
String name = friendList.get(0).getName();
String bDay = Integer.toString(friendList.get(0).getMonth());
String bMonth = Integer.toString(friendList.get(0).getMonth()+1);
String bYear = Integer.toString(friendList.get(0).getYear());
return name + "," + bDay + "," + bMonth + "," + bYear;
}
public void setList(ArrayList<Friend> friendArray) {
this.friendList = friendArray;
}
}
总的来说，我有10个班级，其中3个是不同的班级，列表视图的排序方法，如果问题似乎不在上述任何一个类中，我可以将它们全部发布
答案 0 :(得分：0)
不确定你要做什么 - 特别是addClick（我不确定这个onClick for DatePicker或任何其他按钮）。无论如何，请看以下两件事：
试试这段代码：
public class AddActivity extends ActionBarActivity {
private int year;
private int month;
private int day;
private String name;
private boolean isOK = false;
GregorianCalendar gregCal;
Date date;
FriendList friendlist;
Friend friend;
EditText text;
CharSequence charSequence;
DatePicker datepick;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add);
text = (EditText) findViewById(R.id.namefield);
datepick = (DatePicker) findViewById(R.id.datePicker1);
}
public void checkFriend() {
boolean duplicate = false;
for (int i = 0; i < friendlist.getList().size(); i++) {
if (friendlist.getList().get(i).equals(friend) == true) {
duplicate = true;
}
}
if (name == null) {
charSequence = (CharSequence) "Name is empty!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if (day == 0) {
charSequence = (CharSequence) "Not a valid day!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if (month == 0) {
charSequence = (CharSequence) "Not a valid month!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
}
if (year == 0) {
charSequence = (CharSequence) "Not a valid year!";
Toast.makeText(this, charSequence, Toast.LENGTH_SHORT);
} else if (duplicate == true) {
Toast.makeText(this, "This person already added",
Toast.LENGTH_SHORT).show();
isOK = false;
} else {
isOK = true;
}
}
public void test(View view) {
Toast.makeText(this, "testing", Toast.LENGTH_SHORT).show();
}
public void addClick(View view) {
name = text.getText().toString();
day = datepick.getDayOfMonth();
month = datepick.getMonth();
year = datepick.getYear();
friend = new Friend(name, day, month, year);
friendlist = FriendList.getInstance();
// the toast is to check if the object is added correctly
Toast.makeText(this, friend.toString(), Toast.LENGTH_LONG).show();
checkFriend();
if (isOK == true) {
friendlist.addFriend(new Friend(name, day, month, year));
finish();
}
}
// This is the original code of the adding process, i attempted to re-do it
// to try and see if that could help me solve the problem
// public void saveBirthday(View view){
// text = (EditText)findViewById(R.id.namefield);
//
// DatePicker datePick = (DatePicker)findViewById(R.id.datePicker1);
// name = findViewById(R.id.namefield).toString();
// day = datePick.getDayOfMonth();
// month = datePick.getMonth();
// year = datePick.getYear();
// fl = FriendList.getInstance();
// friend = new Friend(name,day,month,year);
// Toast.makeText(this, friend.toString(), 3).show();
// checkFriend();
// if(isOK==true){
// fl.addFriend(friend);
// finish();
// }
//
//
// }
}