讀取4個微調器項目到另一個4個微調器
[英]Read 4 spinner item to another 4 spinner
問題描述
有人可以幫我檢查我的代碼有什么問題嗎？ 我在WorkDetails有4個spinner ，分別命名為spinner1,2,3 and 4 ，它們的值已插入到SQLite 。現在，我想在project1,project2,project3,project4微調器中顯示在spinner1,2,3,4中選擇的project1,project2,project3,project4但沒有這樣做。
我已經檢查了每個步驟，但仍然無法找出問題所在。
更新.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dbHelper = new MyDatabaseHelper(this);
setContentView(R.layout.updatepage);
final String name = getIntent().getExtras().getString("name1");
final String date=getIntent().getExtras().getString("date1");
final String ID = getIntent().getExtras().getString("ID");
RetrievePage(name,date,ID);
}
public void addProject1(String c)
{
project1=(Spinner)findViewById(R.id.spinner8);
String[] arr = new String[]{"Pro-XXX-XXX","TRN-XXX-XXX","SRV-XXX-XXX","PRO-REE-BERGARDING","PRO-SKM-SSS","PRO-SKM-DI","PRO-SKM-PACKING","PRO-SIE-AVAGO_S110",
"PRO-SIE-BIOCON","PRO-BCM-T13/T17","TRIN-IN_HOUSE","TRIN-EXTERNAL","SRIV-SIE-LEMONGRASS","SRV-PW-SIMOCODE","SRV-REE-SIMOCODE","PRO-SKM-D5","PRO-SKM-DRIOU","PRO-BKI-DESMET",
"PRO-BKI-INFINEON","PRO-INH-ANDROID","PRO-BCM-S120","PRO-GAW-OP"};
List<String> list = new ArrayList<String>();
String project11 = c;
list.add(project11);
for(String s:arr){
if(!list.contains(s)){
list.add(s);
}
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(UpdatePage.this, android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
project1.setAdapter(adapter);
}
public void addProject2(String d)
{
project2=(Spinner)findViewById(R.id.spinner9);
String[] arr = new String[]{"Pro-XXX-XXX","TRN-XXX-XXX","SRV-XXX-XXX","PRO-REE-BERGARDING","PRO-SKM-SSS","PRO-SKM-DI","PRO-SKM-PACKING","PRO-SIE-AVAGO_S110",
"PRO-SIE-BIOCON","PRO-BCM-T13/T17","TRIN-IN_HOUSE","TRIN-EXTERNAL","SRIV-SIE-LEMONGRASS","SRV-PW-SIMOCODE","SRV-REE-SIMOCODE","PRO-SKM-D5","PRO-SKM-DRIOU","PRO-BKI-DESMET",
"PRO-BKI-INFINEON","PRO-INH-ANDROID","PRO-BCM-S120","PRO-GAW-OP"};
List<String> list = new ArrayList<String>();
String project22 = d;
list.add(project22);
for(String s:arr){
if(!list.contains(s)){
list.add(s);
}
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(UpdatePage.this, android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
project2.setAdapter(adapter);
}
public void addProject3(String e)
{
project3=(Spinner)findViewById(R.id.spinner13);
String[] arr = new String[]{"Pro-XXX-XXX","TRN-XXX-XXX","SRV-XXX-XXX","PRO-REE-BERGARDING","PRO-SKM-SSS","PRO-SKM-DI","PRO-SKM-PACKING","PRO-SIE-AVAGO_S110",
"PRO-SIE-BIOCON","PRO-BCM-T13/T17","TRIN-IN_HOUSE","TRIN-EXTERNAL","SRIV-SIE-LEMONGRASS","SRV-PW-SIMOCODE","SRV-REE-SIMOCODE","PRO-SKM-D5","PRO-SKM-DRIOU","PRO-BKI-DESMET",
"PRO-BKI-INFINEON","PRO-INH-ANDROID","PRO-BCM-S120","PRO-GAW-OP"};
List<String> list = new ArrayList<String>();
String project33 = e;
list.add(project33);
for(String s:arr){
if(!list.contains(s)){
list.add(s);
}
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(UpdatePage.this, android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
project3.setAdapter(adapter);
}
public void addProject4(String f)
{
project4=(Spinner)findViewById(R.id.spinner14);
String[] arr = new String[]{"Pro-XXX-XXX","TRN-XXX-XXX","SRV-XXX-XXX","PRO-REE-BERGARDING","PRO-SKM-SSS","PRO-SKM-DI","PRO-SKM-PACKING","PRO-SIE-AVAGO_S110",
"PRO-SIE-BIOCON","PRO-BCM-T13/T17","TRIN-IN_HOUSE","TRIN-EXTERNAL","SRIV-SIE-LEMONGRASS","SRV-PW-SIMOCODE","SRV-REE-SIMOCODE","PRO-SKM-D5","PRO-SKM-DRIOU","PRO-BKI-DESMET",
"PRO-BKI-INFINEON","PRO-INH-ANDROID","PRO-BCM-S120","PRO-GAW-OP"};
List<String> list = new ArrayList<String>();
String project44 = f;
list.add(project44);
for(String s:arr){
if(!list.contains(s)){
list.add(s);
}
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(UpdatePage.this, android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
project4.setAdapter(adapter);
}
public void RetrievePage(String name,String date, String id) {
final String name2 = name;
final String date2=date;
final String id2 = id;
final EditText name3 = (EditText) findViewById(R.id.editText9);
final EditText date3 = (EditText) findViewById(R.id.editText12);
final EditText per1=(EditText) findViewById(R.id.editText20);
final EditText per2=(EditText) findViewById(R.id.editText24);
final EditText per3=(EditText) findViewById(R.id.editText28);
final EditText per4=(EditText) findViewById(R.id.editText32);
database = dbHelper.getWritableDatabase();
c = database.rawQuery("SELECT i.Weather, i.Status,w.Subcontractors, w.NumberOfPerson, w.NumberOfHours, wd.Project, wd.WorkDescription, wd.Per, wd.TimeIn, wd.TimeOut FROM Information i LEFT JOIN WorkForce w ON w.TInfo_id = i._id LEFT JOIN WorkDetails wd ON wd.Twf_id=w._id WHERE i.Name = ? AND i._id= ? ",
new String[]{String.valueOf(name2),String.valueOf(id2)}, null);
if (c != null) {
while (c.moveToNext()) {
Details WD = new Details();
String Weather = c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Weather));
String Project11=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Project));
String Project22=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Project));
String
Project33=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Project));
String Project44=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Project));
String Per1=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Per));
String Per2=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Per));
String Per3=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Per));
String Per4=c.getString(c.getColumnIndexOrThrow(MyDatabaseHelper.Per));
addProject1(Project11);
addProject2(Project22);
addProject3(Project33);
addProject4(Project44);
addWeather(Weather);
WD.setProject(Project11);
WD.setProject(Project22);
WD.setProject(Project33);
WD.setProject(Project44);
WD.setPer(Per1);
WD.setPer(Per2);
WD.setPer(Per3);
WD.setPer(Per4);
per1.setText(Per1);
per2.setText(Per2);
per3.setText(Per3);
per4.setText(Per4);
}
}
c.close();
}
錯誤的LogCat
Process: com.example.project.project, PID: 2364
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:401)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:194)
at android.widget.Spinner.onMeasure(Spinner.java:580)
at android.support.v7.widget.AppCompatSpinner.onMeasure(AppCompatSpinner.java:410)
at android.view.View.measure(View.java:18788)
at android.view.ViewGroup.measureChild(ViewGroup.java:5922)
at android.view.ViewGroup.measureChildren(ViewGroup.java:5899)
at android.widget.AbsoluteLayout.onMeasure(AbsoluteLayout.java:66)
我有一個活動，其中有一個微調器，下面的代碼對我來說很好用。
public void addWeather(String a) {
weather3 = (Spinner) findViewById(R.id.spinner5);
String[] arr = new String[]{"Sunny","Cloudy","Rainy","Thunderstorm"};
List<String> list = new ArrayList<String>();
String weather = a;
list.add(weather);
for(String s:arr){
if(!list.contains(s)){
list.add(s);
}
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(UpdatePage.this, android.R.layout.simple_spinner_dropdown_item, list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
weather3.setAdapter(adapter);
}
1 個解決方案
解決方案1
0 已采納 2015-10-19 04:21:29
由於異常似乎發生在代碼之外（但與代碼有些相關），因此您可能希望在每個方法的開頭放置斷點，並查看應用程序崩潰的確切位置，以幫助您弄清問題所在。 或者，將日志打印放在每個方法的開始和結尾處，以查看哪個方法開始和失敗，並幫助檢測問題出在哪里。
我的猜測是，您要將null作為參數傳遞給您的addProject（）方法之一，這將導致列表包含一個null對象，然后，當適配器嘗試在該null對象上調用toString（）方法時，您將獲得錯誤。 該對象也可以隱式傳遞，例如，作為您忘記初始化的變量。 您可以做的是檢查參數是否為null，只有在參數不是null時，才將其添加到列表中，或者如果參數為null則在其開始時退出該方法或實現所需的任何邏輯。
將微調器項目讀取到另一個微調器
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