Android应用程序崩溃，没有logcat错误
我正在为明天到期的移动应用程序开发最终项目开发一个android应用程序，但遇到了一个问题。直到昨天，我的应用程序在我的手机上还能正常运行，但从那以后我不知怎么搞砸了。这个程序运行得很好，在模拟器上完成了我需要的一切，甚至在我昨天添加了所有东西之后，所以我认为这个应用程序已经完全完成，可以演示了。然而，我今天在手机上运行了它，发现在启动以下活动时应用程序正在崩溃Android应用程序崩溃，没有logcat错误,android,crash,textwatcher,Android,Crash,Textwatcher,我正在为明天到期的移动应用程序开发最终项目开发一个android应用程序，但遇到了一个问题。直到昨天，我的应用程序在我的手机上还能正常运行，但从那以后我不知怎么搞砸了。这个程序运行得很好，在模拟器上完成了我需要的一切，甚至在我昨天添加了所有东西之后，所以我认为这个应用程序已经完全完成，可以演示了。然而，我今天在手机上运行了它，发现在启动以下活动时应用程序正在崩溃 public class OrderDetails extends AppCompatActivity { private
public class OrderDetails extends AppCompatActivity {
private List<PhoneBook> contactList;
private ListView listView;
private TextView name, number, address, orderTotal, amountReceived, tip, mileage, grandTotal;
private Button add;
private PhonebookAdapter adapter;
PhoneBookHandler db;
double dAmountReceived;
double dTotalCost;
double dSubtract;
double dMileage;
double dGrandTotal;
double dTip;
double dAdd;
double dMilesDriven;
double dMultiply;
double dRatePerMile;
String sAmountReceived;
String sTotalCost;
String sTip;
String sMileage;
String sGrandTotal;
String sAddress;
String ratePerDelivery;
String ratePerMile;
String milesDriven;
EditText eAmountReceived;
EditText eTotalCost;
EditText eTip;
EditText eMileage;
EditText eAddress;
EditText eGrandTotal;
EditText eMilesDriven;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.order_details);
listView = (ListView) findViewById(R.id.contactlist);
db = new PhoneBookHandler(this);
contactList = db.getAllContacts();
adapter = new PhonebookAdapter(this, contactList);
eAddress = (EditText) findViewById(R.id.address);
eTotalCost = (EditText) findViewById(R.id.orderTotal);
eAmountReceived = (EditText) findViewById(R.id.amountReceived);
eTip = (EditText) findViewById(R.id.tip);
eMileage = (EditText) findViewById(R.id.mileage);
eGrandTotal = (EditText) findViewById(R.id.grandTotal);
eMilesDriven = (EditText) findViewById(R.id.milesDriven);
// use shared preferences to inflate mileage edittext with data entered in settings menu
ratePerDelivery = PreferenceManager.getDefaultSharedPreferences(this).getString("ratePerDeliveryPref", null);
ratePerMile = PreferenceManager.getDefaultSharedPreferences(this).getString("ratePerMilePref", null);
eAmountReceived.addTextChangedListener(new TextWatcher()
{
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after){}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count){}
@Override
public void afterTextChanged(Editable s)
{
if (getCurrentFocus() == eAmountReceived)
{
sAmountReceived = eAmountReceived.getText().toString();
sTotalCost = eTotalCost.getText().toString();
sMileage = eMileage.getText().toString();
sTip = eTip.getText().toString();
try
{
dAmountReceived = Double.parseDouble(sAmountReceived);
dTotalCost = Double.parseDouble(sTotalCost);
dSubtract = dAmountReceived - dTotalCost;
dMileage = Double.parseDouble(sMileage);
dGrandTotal = dSubtract + dMileage;
} catch(NumberFormatException e){}
sTip = String.valueOf(dSubtract);
DecimalFormat df = new DecimalFormat("0.00");
sTip = df.format(dSubtract);
eTip.setText(sTip);
sGrandTotal = String.valueOf(dGrandTotal);
sGrandTotal = df.format(dGrandTotal);
eGrandTotal.setText(sGrandTotal);
}
}
});
eTip.addTextChangedListener(new TextWatcher()
{
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after){}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count){}
@Override
public void afterTextChanged(Editable s) {
if (getCurrentFocus() == eTip)
{
sAmountReceived = eAmountReceived.getText().toString();
sTotalCost = eTotalCost.getText().toString();
sMileage = eMileage.getText().toString();
sTip = eTip.getText().toString();
try {
dTip = Double.parseDouble(sTip);
dTotalCost = Double.parseDouble(sTotalCost);
dAdd = dTotalCost + dTip;
dMileage = Double.parseDouble(sMileage);
dGrandTotal = dTip + dMileage;
} catch (NumberFormatException e) {
}
sAmountReceived = String.valueOf(dAdd);
DecimalFormat df = new DecimalFormat("0.00");
sAmountReceived = df.format(dAdd);
eAmountReceived.setText(sAmountReceived);
sGrandTotal = String.valueOf(dGrandTotal);
sGrandTotal = df.format(dGrandTotal);
eGrandTotal.setText(sGrandTotal);
}
}
});
if (ratePerMile.equals("") && !ratePerDelivery.equals(""))
{
eMileage.setText(ratePerDelivery);
}
else
{
eMilesDriven.addTextChangedListener(new TextWatcher()
{
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after){}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count){}
@Override
public void afterTextChanged(Editable s)
{
if (getCurrentFocus() == eMilesDriven)
{
sAmountReceived = eAmountReceived.getText().toString();
sTotalCost = eTotalCost.getText().toString();
sMileage = eMileage.getText().toString();
sTip = eTip.getText().toString();
try
{
milesDriven = eMilesDriven.getText().toString();
dMilesDriven = Double.parseDouble(milesDriven);
dRatePerMile = Double.parseDouble(ratePerMile);
dMultiply = dRatePerMile * dMilesDriven;
dGrandTotal = dSubtract + dMultiply;
} catch(NumberFormatException e){}
sMileage = String.valueOf(dMultiply);
DecimalFormat df = new DecimalFormat("0.00");
sMileage = df.format(dMultiply);
eMileage.setText(sMileage);
sGrandTotal = String.valueOf(dGrandTotal);
sGrandTotal = df.format(dGrandTotal);
eGrandTotal.setText(sGrandTotal);
}
}
});
}
}
public void onClick(View view)
{
name = (EditText) findViewById(R.id.name);
number = (EditText) findViewById(R.id.number);
address = (EditText) findViewById(R.id.address);
orderTotal = (EditText) findViewById(R.id.orderTotal);
amountReceived = (EditText) findViewById(R.id.amountReceived);
tip = (EditText) findViewById(R.id.tip);
mileage = (EditText) findViewById(R.id.mileage);
grandTotal = (EditText) findViewById(R.id.grandTotal);
String cName = name.getText().toString();
String num = number.getText().toString();
String cAddress = address.getText().toString();
String cOrderTotal = orderTotal.getText().toString();
String cAmountReceived = amountReceived.getText().toString();
String cTip = tip.getText().toString();
String cMileage = mileage.getText().toString();
String cGrandTotal = grandTotal.getText().toString();
int id = db.addContact(new PhoneBook(cName, num, cAddress, cOrderTotal,
cAmountReceived, cTip, cMileage, cGrandTotal));
contactList.add(new PhoneBook(id, cName, num, cAddress, cOrderTotal,
cAmountReceived, cTip, cMileage, cGrandTotal));
adapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "Entry Successfully Created.", Toast.LENGTH_LONG).show();
}
public void buttonClickFunction(View v)
{
Intent intent = new Intent(getApplicationContext(), display_database.class);
startActivity(intent);
}
public void sendMessage(View v)
{
eAddress = (EditText) findViewById(R.id.address);
sAddress = eAddress.getText().toString();
String map = "http://maps.google.com/maps?q=" + sAddress;
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(map));
startActivity(intent);
}
}
后文本更改（可编辑的）if (ratePerMile.equals("") && !ratePerDelivery.equals(""))
if (ratePerMile == null && ratePerDelivery != null)
后文本更改（可编辑的）if (ratePerMile.equals("") && !ratePerDelivery.equals(""))
if (ratePerMile == null && ratePerDelivery != null)
将您的android监视器筛选器从“仅显示选定的应用程序”->“无筛选器”更改。。总有错误向你表示感谢。我不知道。我将使用stacktrace更新我的问题。将您的android监视器筛选器从“仅显示选定的应用程序”->“无筛选器”更改。。总有错误向你表示感谢。我不知道。我将用stacktrace更新我的问题。getCurrentFocus（）只是我区分其他两个TextWatcher的一种方法，以避免进入无限循环。但是使用你的第二个建议奏效了！我想让EditTextPreference等于一个空字符串是可以的，但我想不行。无论如何，非常感谢你！你真的保存了我的成绩。getCurrentFocus（）只是我区分其他两个TextWatcher的一种方法，以避免进入无限循环。但是使用你的第二个建议奏效了！我想让EditTextPreference等于一个空字符串是可以的，但我想不行。无论如何，非常感谢你！你真的救了我的分数。