每当我开始活动时突然出现以下错误。 这是完整的logcat：http://pastebin.com/Qdz2BCp4
这是我发生错误的MainActivity：
public class MainActivity extends FragmentActivity {
private DataSource _dataSource;
private Spinner _spinner1, _spinner2;
private int _category;
private double _inch;
private List<String> _categoryList = new ArrayList<String>();
private List<String> _sizes = new ArrayList<String>();
private ArrayAdapter<String> _dataAdapter;
private ArrayAdapter<String> _sizesAdapter;
private String _size;
public static User _user = null;
private boolean _inAccountDetails = false;
public final static String EXTRA_MESSAGE = "com.OBO.Bandenanalyse.Soort";
public final static String EXTRA_MESSAGE2 = "com.OBO.Bandenanalyse.Inch";
public final static String EXTRA_MESSAGE3 = "com.OBO.Bandenanalyse.Maat";
public final static String EXTRA_MESSAGE5 = "com.OBO.Bandenanalyse.User";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(savedInstanceState != null && savedInstanceState.getBoolean("Layout")){
setContentView(R.layout.registration_edit);
initializeAccountDetails((User) savedInstanceState.getSerializable(EXTRA_MESSAGE5));
_inAccountDetails = true;
}else{
String sql = "SELECT * FROM User";
createFile();
if(_dataSource.DbHelper._database != null){
_dataSource.open();
Cursor cursor = _dataSource.DbHelper._database.rawQuery(sql,null);
cursor.moveToFirst();
_dataSource.close();
if(cursor.getCount() == 0){
setContentView(R.layout.registration);
createFile();
} else {
setContentView(R.layout.activity_main);
addListenerOnSpinnerItemSelection();
addListenerOnSpinner2ItemSelection();
createFile();
_user = getUser();
}
cursor.close();
}
}
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putBoolean("Layout", _inAccountDetails);
savedInstanceState.putSerializable(EXTRA_MESSAGE5, (Serializable) _user);
}
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
savedInstanceState.getBoolean("Layout");
_user = (User) savedInstanceState.getSerializable(EXTRA_MESSAGE5);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.account_manager:
setContentView(R.layout.registration_edit);
initializeAccountDetails(_user);
_inAccountDetails = true;
return true;
case R.id.delete_account:
new DeleteDialogFragment().show(getSupportFragmentManager(), "Dialog");
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void initializeAccountDetails(User user){
try{
EditText editText1 = (EditText) findViewById(R.id.editText1);
editText1.setText(user.getFirstName());
EditText editText2 = (EditText) findViewById(R.id.EditText01);
editText2.setText(user.getSurname());
EditText editText3 = (EditText) findViewById(R.id.EditText02);
editText3.setText(user.getEmail());
EditText editText4 = (EditText) findViewById(R.id.EditText03);
editText4.setText(user.getPostalCode());
EditText editText5 = (EditText) findViewById(R.id.EditText04);
editText5.setText(user.getHouseNumber());
} catch(NullPointerException e){
Toast.makeText(this, getString(R.string.noAccountRegistered), Toast.LENGTH_LONG).show();
}
}
private boolean RetrieveInfo(){
String email, voornaam, achternaam, postalCode, housenumber;
EditText emailTxt = (EditText) findViewById(R.id.EditText02);
EditText voornaamTxt = (EditText) findViewById(R.id.editText1);
EditText achternaamTxt = (EditText) findViewById(R.id.EditText01);
EditText postalCodeTxt = (EditText) findViewById(R.id.EditText03);
EditText housenumberTxt = (EditText) findViewById(R.id.EditText04);
if(!emailTxt.getText().toString().matches("") && !voornaamTxt.getText().toString().matches("")
&& !achternaamTxt.getText().toString().matches("") && !postalCodeTxt.getText().toString().matches("")
&& !housenumberTxt.getText().toString().matches("")){
email = emailTxt.getText().toString();
voornaam = voornaamTxt.getText().toString();
achternaam = achternaamTxt.getText().toString();
postalCode = postalCodeTxt.getText().toString();
housenumber = housenumberTxt.getText().toString();
_user = null;
_user = new User(email,voornaam,achternaam,postalCode,housenumber);
return true;
} else {
return false;
}
}
private static final String EMAIL_PATTERN =
"^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
private boolean CheckInfo(){
Pattern pattern = Pattern.compile(EMAIL_PATTERN);
EditText emailTxt = (EditText) findViewById(R.id.EditText02);
Debug.out(emailTxt.getText().toString());
if(pattern.matcher(emailTxt.getText().toString()).matches()){
return true;
} else {
Toast.makeText(getApplicationContext(), getString(R.string.noValidEmail), Toast.LENGTH_LONG).show();
return false;
}
}
public void toApplicationEdit(View view){
if(CheckInfo()){
if(RetrieveInfo()){
Intent intent = new Intent(this,this.getClass());
String sql = "UPDATE User SET Email='"+_user.getEmail()+
"', Voornaam='"+_user.getFirstName()+
"', Achternaam='"+_user.getSurname()+
"', PostalCode='"+_user.getPostalCode()+
"', Housenumber='"+_user.getHouseNumber()+
"' WHERE User_ID="+1+";";
if(_dataSource.DbHelper._database != null){
_dataSource.open();
_dataSource.DbHelper._database.execSQL(sql);
_dataSource.close();
}
startActivity(intent);
} else {
Toast.makeText(this, getString(R.string.everyFieldIsMandatory), Toast.LENGTH_LONG).show();
}
}
}
public void cancelToApplication(View view){
Intent intent = new Intent(this, this.getClass());
startActivity(intent);
}
public void toApplication(View view){
if(CheckInfo()){
if(RetrieveInfo()){
Intent intent = new Intent(this, this.getClass());
String sql = "INSERT INTO User(Email, Voornaam, Achternaam, PostalCode, Housenumber)" +
" VALUES('"+_user.getEmail()+"'," +
"'"+_user.getFirstName()+"','"+_user.getSurname()+"'," +
"'"+_user.getPostalCode()+"','"+_user.getHouseNumber()+"');";
String sql2 = "SELECT User_ID From User WHERE Email = '"+_user.getEmail()+"';";
_dataSource = new DataSource(this);
if(_dataSource.DbHelper._database != null){
_dataSource.open();
_dataSource.DbHelper._database.execSQL(sql);
Cursor cursor = _dataSource.DbHelper._database.rawQuery(sql2,null);
cursor.moveToFirst();
_dataSource.close();
while (!cursor.isAfterLast()) {
cursor.moveToNext();
}
cursor.close();
}
startActivity(intent);
} else {
Toast.makeText(this, getString(R.string.everyFieldIsMandatory), Toast.LENGTH_LONG).show();
}
}
}
private User getUser(){
String sql = "SELECT * FROM User";
String email = "", voornaam = "", achternaam = "", postalCode = "", housenumber = "";
if(_dataSource.DbHelper._database != null){
_dataSource.open();
Cursor cursor = _dataSource.DbHelper._database.rawQuery(sql,null);
cursor.moveToFirst();
_dataSource.close();
while (!cursor.isAfterLast()) {
email = cursor.getString(1);
voornaam = cursor.getString(2);
achternaam = cursor.getString(3);
postalCode = cursor.getString(4);
housenumber = cursor.getString(5);
cursor.moveToNext();
}
cursor.close();
}
return new User(email,voornaam,achternaam,postalCode,housenumber);
}
public void createFile(){
_dataSource = new DataSource(this);
}
public void addItemsOnSpinner2(List<String> list) {
_spinner2 = (Spinner) findViewById(R.id.spinner2);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
_spinner2.setAdapter(dataAdapter);
_sizesAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, list);
}
public void addItemsToAdapter(List<String> list){
_dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list);
}
public void addListenerOnSpinnerItemSelection() {
_spinner1 = (Spinner) findViewById(R.id.spinner1);
_spinner1.setOnItemSelectedListener(
new OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> parent, View view, int position, long id) {
_inch = Double.parseDouble(parent.getItemAtPosition(position).toString());
String sql = "SELECT Maat, Category FROM Band Where Inch = "+_inch;
_spinner2 = (Spinner) findViewById(R.id.spinner2);
if(_dataSource.DbHelper._database != null){
_dataSource.open();
Cursor cursor = _dataSource.DbHelper._database.rawQuery(sql,null);
cursor.moveToFirst();
_dataSource.close();
if(_categoryList.size() != 0){
_categoryList.clear();
}
if(_sizes.size() != 0){
_sizes.clear();
}
while (!cursor.isAfterLast()) {
_sizes.add(cursor.getString(0));
if(cursor.getString(1) !=null){
_categoryList.add(cursor.getString(1));
}
cursor.moveToNext();
}
cursor.close();
}
addItemsOnSpinner2(_sizes);
addItemsToAdapter(_categoryList);
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
public void addListenerOnSpinner2ItemSelection() {
_spinner2 = (Spinner) findViewById(R.id.spinner2);
_spinner2.setOnItemSelectedListener(
new OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> parent, View view, int position, long id) {
if(_categoryList != null){
_category = Integer.parseInt(_dataAdapter.getItem(position));
}
if(_sizes != null){
_size = _sizesAdapter.getItem(position);
}
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
public void next(View view) {
Intent intent = new Intent(this, Step2.class);
intent.putExtra(EXTRA_MESSAGE, _category);
intent.putExtra(EXTRA_MESSAGE2, _inch);
intent.putExtra(EXTRA_MESSAGE3, _size);
intent.putExtra(EXTRA_MESSAGE5, (Serializable) _user);
startActivity(intent);
}
}
据我所知，我没有做任何与在内存上创建文件有关的事情。我在createFile方法中唯一做的就是检查内存中是否存在数据库（如果我相信我的文件浏览器，它确实存在）。如果数据库不存在，它将创建数据库。