嗨，我将这段代码添加到我的 Android 应用程序中，它突然停止工作（它不会启动）。我正在尝试确保如果选择的返回日期小于出发日期，则不允许用户继续进行操作。
String departureDateTemp = dYear+ ""+ ""+dMonth + ""+dDay;
int departureDateTemp2 = Integer.parseInt(departureDateTemp);
String returnDateTemp = rYear+ ""+ ""+rMonth + ""+rDay;
int returnDateTemp2 = Integer.parseInt(returnDateTemp);
if(returnDateTemp2 >= departureDateTemp2){
//MESSAGE
if(buttonR.isChecked()){
String returnDate = txR.getText().toString();
basket.putString("returnDate", returnDate);
type = "Return";
}
else{
type = "Oneway";
}
}
else{
btnSubmit.setEnabled(false);
}
我的全部活动是这个
public class MainActivity extends FragmentActivity {
private int dYear;
private int dMonth;
private int dDay;
private int rYear;
private int rMonth;
private int rDay;
static final int dDATE_DIALOG_ID = 0;
static final int rDATE_DIALOG_ID = 1;
private RadioButton buttonO = null;
private RadioButton buttonR = null;
private TableRow tr;
TextView txD, txR;
private Button btnDepart,btnReturn, btnSubmit,btnClose;
private Spinner noOfPassengersSpinner,departureSpinner,returnSpinner;
private CheckBox tandCCB;
final Context context = this;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonO = (RadioButton) findViewById(R.id.radioO);
buttonR = (RadioButton) findViewById(R.id.radioR);
txD=(TextView)findViewById(R.id.tvDepartureDate);
txR=(TextView)findViewById(R.id.tvReturnDate);
btnDepart = (Button)findViewById(R.id.btnDepart);
btnReturn = (Button)findViewById(R.id.btnReturn);
tr = (TableRow)findViewById(R.id.tableRow5);
btnSubmit = (Button)findViewById(R.id.btnSubmit);
btnClose = (Button)findViewById(R.id.btnClose);
noOfPassengersSpinner = (Spinner)findViewById(R.id.noOfPassengersSpinner);
departureSpinner = (Spinner)findViewById(R.id.departureSpinner);
returnSpinner = (Spinner)findViewById(R.id.returnSpinner);
tandCCB = (CheckBox)findViewById(R.id.tandCCB);
final Calendar dC = Calendar.getInstance();
final Calendar rC = Calendar.getInstance();
dYear = dC.get(Calendar.YEAR);
dMonth = dC.get(Calendar.MONTH);
dDay = dC.get(Calendar.DAY_OF_MONTH);
rYear = rC.get(Calendar.YEAR);
rMonth = rC.get(Calendar.MONTH);
rDay = rC.get(Calendar.DAY_OF_MONTH);
updateDisplay();
tandCCB.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if(isChecked){
btnSubmit.setEnabled(true);
}
else{
btnSubmit.setEnabled(false);
}
}
});
this.btnClose.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
finish();
System.exit(0);
}
});
this.btnSubmit.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
String depAir = departureSpinner.getSelectedItem().toString();
String desAir = returnSpinner.getSelectedItem().toString();
int numOfPass = Integer.parseInt(noOfPassengersSpinner.getSelectedItem().toString());
Bundle basket = new Bundle();
basket.putString("departureAir", depAir);
basket.putString("destenationAir", desAir);
basket.putInt("numOfPass", numOfPass);
basket.putString("depDate", txD.getText().toString());
String type = "";
String departureDateTemp = dYear+ ""+ ""+dMonth + ""+dDay;
int departureDateTemp2 = Integer.parseInt(departureDateTemp);
String returnDateTemp = rYear+ ""+ ""+rMonth + ""+rDay;
int returnDateTemp2 = Integer.parseInt(returnDateTemp);
if(returnDateTemp2 >= departureDateTemp2){
//MESSAGE
if(buttonR.isChecked()){
String returnDate = txR.getText().toString();
basket.putString("returnDate", returnDate);
type = "Return";
}
else{
type = "Oneway";
}
}
else{
btnSubmit.setEnabled(false);
}
basket.putString("type", type);
Intent intent = new Intent(context, Second.class);
intent.putExtra("basket", basket);
startActivity(intent);
}
});
this.buttonO.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
tr.setVisibility(View.GONE);
}
});
this.buttonR.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
tr.setVisibility(View.VISIBLE);
}
});
this.btnDepart.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
showDialog(dDATE_DIALOG_ID);
}
});
this.btnReturn.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
showDialog(rDATE_DIALOG_ID);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private void updateDisplay() {
txD.setText(
new StringBuilder()
// Month is 0 based so add 1
.append(dYear).append("-")
.append(dMonth + 1).append("-")
.append(dDay).append(" ")
);
txR.setText(
new StringBuilder()
.append(rYear).append("-")
.append(rMonth + 1).append("-")
.append(rDay).append(" ")
);
}
private DatePickerDialog.OnDateSetListener dDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
dYear = year;
dMonth = monthOfYear;
dDay = dayOfMonth;
updateDisplay();
}
};
private DatePickerDialog.OnDateSetListener rDateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
rYear = year;
rMonth = monthOfYear;
rDay = dayOfMonth;
updateDisplay();
}
};
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case dDATE_DIALOG_ID:
return new DatePickerDialog(this,
dDateSetListener,
dYear, dMonth, dDay);
case rDATE_DIALOG_ID:
return new DatePickerDialog(this,
rDateSetListener,
rYear, dMonth, rDay);
}
return null;
}
}
这是我的控制台输出
[2013-04-26 13:37:44 - Assignment2] ------------------------------
[2013-04-26 13:37:44 - Assignment2] Android Launch!
[2013-04-26 13:37:44 - Assignment2] adb is running normally.
[2013-04-26 13:37:44 - Assignment2] Performing com.example.assignment2.MainActivity activity launch
[2013-04-26 13:37:44 - Assignment2] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'tester'
[2013-04-26 13:37:44 - Assignment2] Uploading Assignment2.apk onto device 'emulator-5554'
[2013-04-26 13:37:46 - Assignment2] Installing Assignment2.apk...
[2013-04-26 13:37:49 - Assignment2] Re-installation failed due to different application signatures.
[2013-04-26 13:37:49 - Assignment2] You must perform a full uninstall of the application. WARNING: This will remove the application data!
[2013-04-26 13:37:49 - Assignment2] Please execute 'adb uninstall com.example.assignment2' in a shell.
[2013-04-26 13:37:49 - Assignment2] Launch canceled!
提前致谢！