在寻找解决方案3天后，我希望有人可以在这里帮助我，我是Android开发的新手，我试图将我的datepicker对话框或我的datepicker小部件的日期保存到我的sqlite数据库，我没有错误，但它保存我的日期为12/31/1969无论我做什么这是我的DatePickerFragment类
//add content to table
public void addProduct(MyProduct product){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(PRODUCT_NAME, product.getproductName());
values.put(PRODUCT_NUMBER, product.getproductNumber());
values.put(PRODUCT_WEIGHT, product.getproductWeight());
values.put(PRODUCT_QTY, product.getproductQTY());
values.put(DATE_NAME, product.getproductDate());
db.insert(TABLE_NAME, null, values);
Log.v("Wish successfully!", "yeah!!");
db.close();
}
你可以看到我有一个textview显示选择日期没问题。 这是我添加到表格的DataBaseHelper代码。
private void saveProductDB() {
Intent intent = getIntent();
final Double myLabelResults = intent.getDoubleExtra("totalQTY", 0.0);
final MyProduct product = new MyProduct();
product.setproductName(saveproductNameText.getText().toString().trim());
product.setproductNumber(Integer.valueOf(saveproductNumberText.getText().toString().trim()));
product.setproductWeight(myLabelResults);
product.setproductQTY(myLabelResults / 14);
product.getproductPavingOnLabel();
saveProductDate = (DatePicker)findViewById(R.id.saveProductDatePicker);
Calendar calendar = Calendar.getInstance();
int day = saveProductDate.getDayOfMonth();
int month = saveProductDate.getMonth();
int year = saveProductDate.getYear();
calendar.set(day, month, year);
long myLongDate = calendar.getTimeInMillis();
product.setProductDate(myLongDate);
dba.Product(product);
dba.close();
saveproductNameText.setText("");
saveproductNumberText.setText("");
Intent i = new Intent(SaveProduct.this, MyProductActivity.class);
startActivity(i);
//Toast.makeText(getApplicationContext(),"Product Saved", Toast.LENGTH_LONG).show();
}
这就是我试图保存日期的方式。
@Override
public void onCreate(SQLiteDatabase db) {
//create our table
db.execSQL("CREATE TABLE " + TABLE_NAME+ "(ID INTEGER PRIMARY KEY AUTOINCREMENT, PRODUCTNAME TEXT, PRODUCTNUMBER INTEGER, PRODUCTQTY REAL, PRODUCTWEIGHT REAL, PRODUCTDATE LONG, PRODUCTCOMPLETED INTEGER)");
}
我的数据库表就是这样生成的
long dateFromProductDate = holder.myProduct.getProductDate();
String dateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(dateFromProductDate));
holder.mJobsDate.setText(dateString);
在我的getView方法中我试图将我的long格式化为像这样的字符串
count_odd_digits(n):
有人可以帮我弄清楚我在哪里犯了错误。
答案 0 :(得分：1)
发现问题，非常感谢@Nolly j的帮助，在我的产品活动中，我有一个refreshData方法，将日期设置为字符串用于测试目的，忘记将其更改为long，这里是。< / p>
String inserttable = (
"insert into slam(mobileno , fname , sname , nname , telephone, address, email, bornon, crush, hm, fp, fa, fas, fs, ff, ambition, ayif, impbo, date)" +
"values ('" + st + "' , '" + a + "' , '" + b + "' , '" + c + "' , " + d + " , '" + e + "' , '" + f + "' , '" + g + "' , '" + h + "' , '" + i + "' , '" + j + "' , '" + k + "' , '" + l + "' , '" + m + "' , '"+ o + "' , '"+ p + "' , '"+ q + "' , '"+ r + "');");
注释掉的陈述是问题所在。
答案 1 :(得分：0)
我写了一个简单的代码，可以帮助你找到正确的方向。选定的日期时间是全局的，可以访问。
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AppCompatActivity;
import android.widget.DatePicker;
import android.widget.TextView;
import java.util.Calendar;
public class MainActivity extends AppCompatActivity {
private static TextView chooseDateLabel;
private DatePickerFragment datePickerFragment;
private static Calendar dateTime = Calendar.getInstance();
protected static int mYear;
protected static int mMonth;
protected static int mDay;
private static long dateInMilliSeconds;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
chooseDateLabel = (TextView)findViewById(R.id.chooseDateLabel);
datePickerFragment = new DatePickerFragment();
datePickerFragment.show(getSupportFragmentManager(), "My Date Picker");
}
public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Using current date as start Date
final Calendar c = Calendar.getInstance();
mYear = c.get(Calendar.YEAR);
mMonth = c.get(Calendar.MONTH);
mDay = c.get(Calendar.DAY_OF_MONTH);
// Get DatePicker Dialog
return new DatePickerDialog(getActivity(), this, mYear, mMonth, mDay);
}
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
mYear = year;
mMonth = monthOfYear;
mDay = dayOfMonth;
chooseDateLabel.setText(String.valueOf(mDay) + "/" + String.valueOf(mMonth) + "/" + String.valueOf(mYear));
dateTime.set(mYear, monthOfYear, dayOfMonth);
dateInMilliSeconds = dateTime.getTimeInMillis();
}
}
private void saveProductDB(){
Intent intent = getIntent();
final Double myLabelResults = intent.getDoubleExtra("totalQTY", 0.0);
final MyProduct product = new MyProduct();
product.setproductName(saveproductNameText.getText().toString().trim());
product.setproductNumber(Integer.valueOf(saveproductNumberText.getText().toString().trim()));
product.setproductWeight(myLabelResults);
product.setproductQTY(myLabelResults / 14);
product.setProductDate(dateInMilliSeconds);
product.getproductPavingOnLabel();
dba.Product(product);
dba.close();
saveproductNameText.setText("");
saveproductNumberText.setText("");
Intent i = new Intent(SaveProduct.this, MyProductActivity.class);
startActivity(i);
}
}
这是我的列表视图的getView代码
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
//ViewHolder holder = null;
if(row == null || (row.getTag()) == null){
LayoutInflater inflater = LayoutInflater.from(activity);
row = inflater.inflate(layoutResorce, null);
holder = new ViewHolder();
holder.mProductName = (TextView) row.findViewById(R.id.ProductNameLabel);
holder.mProductNumber = (TextView) row.findViewById(R.id.ProductNumberLabel);
holder.mProductWeight = (TextView) row.findViewById(R.id.WeightLabel);
holder.mProductQTY = (TextView) row.findViewById(R.id.QTYLable);
holder.mProductDate = (TextView) row.findViewById(R.id.dateLabel);
row.setTag(holder);
}else{
holder = (ViewHolder) row.getTag();
}
holder.myProduct = getItem(position);
holder.mProductName.setText(holder.myProduct.getProductName());
holder.mProductNumber.setText(String.valueOf(holder.myProduct.getProductNumber()));
holder.mProductWeight.setText(String.format("%.1f", holder.myProduct.getProductWeight()) + " Weight");
holder.mProductQTY.setText(String.format("%.1f", holder.myProduct.getProductQTY()) + " QTY");
long dateFromProductDate = holder.myProduct.getProductDate();
String dateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(dateFromProductDate));
holder.mProductDate.setText(dateString);
return row;
}
//get all products
public ArrayList<MyProduct> getProducts(){
//String selectQuery = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME, new String[]{ PRODUCT_NAME, PRODUCT_NUMBER, PRODUCT_QTY,
PRODUCT_WEIGHT, DATE_NAME}, null, null, null, null, "PRODUCTDATE DESC");
//loop through cursor
if(cursor.moveToFirst()){
do{
MyProduct job = new MyProduct();
product.setProductName(cursor.getString(cursor.getColumnIndex(PRODUCT_NAME)));
product.setProductNumber(cursor.getInt(cursor.getColumnIndex(PRODUCT_NUMBER)));
product.setProductWeight(cursor.getDouble(cursor.getColumnIndex(PRODUCT_WEIGHT)));
product.setProductQTY(cursor.getDouble(cursor.getColumnIndex(PRODUCT_QTY)));
//product.setProductDate(cursor.getLong(cursor.getColumnIndex(DATE_NAME)));
long milliSeconds = product.setProductDate(cursor.getLong(product.getProductDate()));
DateFormat df = new SimpleFormat("MM/dd/yyyy");
String dateString = df.format(new Date(milliSeconds)).toString();
//java.text.DateFormat dateFormat = java.text.DateFormat.getDateInstance();
//String dateData = dateFormat.format(new Date(cursor.getLong(cursor.getColumnIndex(DATE_NAME))).getTime());
product.setProductDate(dateString);
productList.add(product);
}while(cursor.moveToNext());
}
cursor.close();
db.close();
return productList;
}