在我的代码中，我为两个数据选择器设置了监听器，并为提交设置了监听器。当我运行应用程序时，第一次我可以使用数据选择器分配值，但是当我第二次设置尝试时，值分配不会发生。我的代码有什么问题吗？
public class MainActivity extends Activity {
private GraphicalView mChart;
// private DatePicker dpResult;
private Button submit;
private Button btnChangeDate;
private Button btnChangeDatetwo;
static final int DATE_DIALOG_ID = 100;
static final int DATE_DIALOG_ID_TWO = 101;
private int year;
private int month;
private int day;
private int year_end;
private int month_end;
private int day_end;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// requestWindowFeature(Window.FEATURE_NO_TITLE);
// getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
// openChart();
// openCharttwo();
//openChartthree();
addListenerOnButton();// listeners for calender events
addListenerOnButtontwo();
addListnerOnSubmitButton();
}
private void openChartthree(Date startdateValue,Date enddateValue) {
String val;
// Date[] val2 = null;//this holds dates
String val3;
String val32;
String val33;
String val34;
// Date[] date;
// Date[] datearray = null;
/*
* GregorianCalendar startdate = new GregorianCalendar(2011,11,28,
* 0,00); GregorianCalendar enddate = new GregorianCalendar(2012,3,4,
* 0,00);
*/
val = this.getString(R.string.dateCollection);
val3 = this.getString(R.string.values);
val32 = this.getString(R.string.values2);// second graph
val33 = this.getString(R.string.values3);// third graph
val34 = this.getString(R.string.values4);// fourth chart
String[] newdate = val.split(",");
String[] values = val3.split(",");
String[] values2 = val32.split(",");// spliting second values
String[] values3 = val33.split(",");// spliting third values
String[] values4 = val34.split(",");// spliting fourth values
Double[] results = new Double[values.length];
Double[] results2 = new Double[values.length];// saving second values
// array in int array
Double[] results3 = new Double[values.length];// saving third values
// array in int array
Double[] results4 = new Double[values.length];// saving third values
// array in int array
// converting string to integers
// int[] results2 = results;
for (int i = 0; i < values.length; i++) {
try {
// String temp = values[0];
// int itest = Integer.parseInt(temp);
results[i] = Double.parseDouble(values[i]);
results2[i] = Double.parseDouble(values2[i]);
results3[i] = Double.parseDouble(values3[i]);
results4[i] = Double.parseDouble(values4[i]);
} catch (NumberFormatException nfe) {
}
;
}
// Creating TimeSeries for Visits
TimeSeries visitsSeries = new TimeSeries("Upper band");
// Creating TimeSeries for Views
TimeSeries viewsSeries = new TimeSeries("Price");
// Creating TimeSeries for Views2
TimeSeries viewsSeries2 = new TimeSeries("Lower band");
// Creating TimeSeries for products
TimeSeries products = new TimeSeries("Moving Average");
// Adding data to Visits and Views Series
for (int i = 0; i < newdate.length; i++) {
try {
// String dt = newdate[i];
// Date datePointer = new SimpleDateFormat("yyyy/MM/dd",
// Locale.ENGLISH).parse(dt);
SimpleDateFormat formatter = new SimpleDateFormat(
"MM/dd/yyyy k:mm");
Date datePointer = formatter.parse(newdate[i]);
if (startdateValue.before(datePointer)
&& enddateValue.after(datePointer)) {
visitsSeries.add(datePointer, results[i]);
viewsSeries.add(datePointer, results2[i]);
viewsSeries2.add(datePointer, results3[i]);
products.add(datePointer, results4[i]);
}
} catch (Exception e) {
}
}
// Creating a dataset to hold each series
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
// Adding Visits Series to the dataset
dataset.addSeries(visitsSeries);
// Adding Visits Series to dataset
dataset.addSeries(viewsSeries);
// Adding Visits Series to dataset
dataset.addSeries(viewsSeries2);
// Adding products Series to dataset
dataset.addSeries(products);
// Creating XYSeriesRenderer to customize productsSeries
XYSeriesRenderer productsRenderer = new XYSeriesRenderer();
productsRenderer.setColor(Color.GREEN);
productsRenderer.setPointStyle(PointStyle.POINT);
productsRenderer.setFillPoints(true);
productsRenderer.setLineWidth(1);
productsRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize visitsSeries
XYSeriesRenderer visitsRenderer = new XYSeriesRenderer();
visitsRenderer.setColor(Color.RED);
// visitsRenderer.setPointStyle(PointStyle.);
visitsRenderer.setFillPoints(true);
visitsRenderer.setLineWidth(1);
visitsRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize viewsSeries
XYSeriesRenderer viewsRenderer = new XYSeriesRenderer();
viewsRenderer.setColor(Color.WHITE);
// viewsRenderer.setPointStyle(PointStyle.CIRCLE);
viewsRenderer.setFillPoints(true);
viewsRenderer.setLineWidth(1);
viewsRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize viewsSeries
XYSeriesRenderer viewsRenderer2 = new XYSeriesRenderer();
viewsRenderer2.setColor(Color.BLUE);
// viewsRenderer2.setPointStyle(PointStyle.CIRCLE);
viewsRenderer2.setFillPoints(true);
viewsRenderer2.setLineWidth(1);
viewsRenderer2.setDisplayChartValues(true);
// Creating a XYMultipleSeriesRenderer to customize the whole chart
XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
// multiRenderer.setChartTitle("Visits vs Views Chart");
multiRenderer.setXTitle("Days");
multiRenderer.setYTitle("Count");
multiRenderer.setZoomButtonsVisible(true);
// Adding visitsRenderer and viewsRenderer to multipleRenderer
// Note: The order of adding dataseries to dataset and renderers to
// multipleRenderer
// should be same
multiRenderer.addSeriesRenderer(visitsRenderer);
multiRenderer.addSeriesRenderer(viewsRenderer);
multiRenderer.addSeriesRenderer(viewsRenderer2);
multiRenderer.addSeriesRenderer(productsRenderer);
// Getting a reference to LinearLayout of the MainActivity Layout
LinearLayout chartContainer = (LinearLayout) findViewById(R.id.chart_container);
// Creating a Time Chart
mChart = (GraphicalView) ChartFactory.getTimeChartView(
getBaseContext(), dataset, multiRenderer, "dd-MMM-yyyy");
multiRenderer.setClickEnabled(true);
multiRenderer.setSelectableBuffer(10);
// Setting a click event listener for the graph
mChart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Format formatter = new SimpleDateFormat("dd-MMM-yyyy");
SeriesSelection seriesSelection = mChart
.getCurrentSeriesAndPoint();
if (seriesSelection != null) {
int seriesIndex = seriesSelection.getSeriesIndex();
String selectedSeries = "Visits";
if (seriesIndex == 0)
selectedSeries = "Lower bound ";
else if (seriesIndex == 1)
selectedSeries = "Upperbound";
else
selectedSeries = "Price";
// Getting the clicked Date ( x value )
long clickedDateSeconds = (long) seriesSelection
.getXValue();
Date clickedDate = new Date(clickedDateSeconds);
String strDate = formatter.format(clickedDate);
// Getting the y value
int amount = (int) seriesSelection.getValue();
// Displaying Toast Message
Toast.makeText(getBaseContext(),
selectedSeries + " on " + strDate + " : " + amount,
Toast.LENGTH_SHORT).show();
}
}
});
// Adding the Line Chart to the LinearLayout
chartContainer.addView(mChart);
// Toast.makeText(getApplicationContext(), "msg"+newdate,
// Toast.LENGTH_LONG).show();
}
// //////////////////////////////////////////////////////////opencart two
// ////////////////////////////////
// ////////////////////////////////////////date selecting code starts from
// here/////////////////////////////////////////////////////////////////////
// user can select start and end date via dialog box calender view
public void addListenerOnButtontwo() {
final Calendar c = Calendar.getInstance();
year_end = c.get(Calendar.YEAR);
month_end = c.get(Calendar.MONTH);
day_end = c.get(Calendar.DAY_OF_MONTH);
btnChangeDatetwo = (Button) findViewById(R.id.endate);
btnChangeDatetwo.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog(DATE_DIALOG_ID_TWO);
}
});
}
public void addListenerOnButton() {
final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
btnChangeDate = (Button) findViewById(R.id.startdate);
btnChangeDate.setOnClickListener(new OnClickListener() {
@SuppressWarnings("deprecation")
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
showDialog(DATE_DIALOG_ID);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
// set date picker as current date
return new DatePickerDialog(this, datePickerListener, year, month,day);
case DATE_DIALOG_ID_TWO:
return new DatePickerDialog(this, datePickerListener_end, year_end, month_end, day_end);
}
return null;
}
private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
year = selectedYear;
month = selectedMonth +1;
day = selectedDay;
// set selected date into textview
// tvDisplayDate.setText(new StringBuilder().append(month + 1)
// .append("-").append(day).append("-").append(year)
// .append(" "));
Toast.makeText(getApplicationContext(),
"msg " + year + "-" + month + "-" + day,
Toast.LENGTH_SHORT).show();
}
};
private DatePickerDialog.OnDateSetListener datePickerListener_end = new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
year_end = selectedYear;
month_end = selectedMonth+1;
day_end = selectedDay;
// set selected date into textview
// tvDisplayDate.setText(new StringBuilder().append(month + 1)
// .append("-").append(day).append("-").append(year)
// .append(" "));
// set selected date into datepicker also
// dpResult.init(year, month, day, null);
Toast.makeText(getApplicationContext(),
"msg" + year_end + "-" + month_end + "-" + day_end,
Toast.LENGTH_SHORT).show();
}
};
public void addListnerOnSubmitButton() {
addListenerOnButton();// listeners for calender events
addListenerOnButtontwo();
submit = (Button) findViewById(R.id.button1);
submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
StringBuilder sb = new StringBuilder();
sb.append(year);
sb.append("/");
sb.append(month);
sb.append("/");
sb.append(day);
String start=sb.toString();
StringBuilder sb2 = new StringBuilder();
sb.append(year_end);
sb.append("/");
sb.append(month_end);
sb.append("/");
sb.append(day_end);
String end=sb2.toString();
Date startdateValue = new Date();
Date enddateValue = new Date();
try {
// if(year == 0 || year_end == 0){
// start="11/2/2011";
// end="1/7/2013";
// }
startdateValue = new SimpleDateFormat("yyyy/MM/dd", Locale.ENGLISH)
.parse(start);
enddateValue = new SimpleDateFormat("yyyy/MM/dd", Locale.ENGLISH)
.parse(end);
} catch (Exception e) {
}
openChartthree(startdateValue, enddateValue);//calling charting method to render, passing start and end dates
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
请帮我更正代码。
month_end = selectedMonth+1;
我必须向month_end变量添加1，因为它总是在month_end变量中显示(month-1)。
最佳答案
尝试更改为此 -
public void addButtonListenerOnBothButtons(){
btnChangeDatetwo = (Button) findViewById(R.id.endate);
btnChangeDate = (Button) findViewById(R.id.startdate);
submit = (Button) findViewById(R.id.button1);
btnChangeDatetwo.setOnClickListener(this);
btnChangeDate.setOnClickListener(this);
submit.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
switch(arg0.getId()){
case R.id.endate:
final Calendar c = Calendar.getInstance();
year_end = c.get(Calendar.YEAR);
month_end = c.get(Calendar.MONTH);
day_end = c.get(Calendar.DAY_OF_MONTH);
showDialog(DATE_DIALOG_ID_TWO);
break;
case R.id.startdate:
final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
showDialog(DATE_DIALOG_ID);
break;
case R.id.button1:
// do something when submit button pressed
break;
}
}
只需从 onCreate 调用 addButtonListenerOnBothButtons 方法，并将事件处理程序附加到所有三个按钮一次，而无需使用单独的函数和匿名类。
关于java - 仅在 onCreate 值分配时发生，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15871561/