I get no compilation errors or even significant warnings, yet when I run the program, it force closes and the log tells me there's some kind of error on a line. It succeeded once, but I don't know how or when.
onClick method:
public TextView equation;
public TextView answer11;
public TextView answer12;
public TextView or1;
public TextView or2;
public void SolveOnClick(View view){
EditText a = (EditText)findViewById(R.id.aValue);
EditText b = (EditText)findViewById(R.id.bValue); //screws up somewhere here
EditText c = (EditText)findViewById(R.id.cValue);
equation = (TextView)findViewById(R.id.equationText);
answer11 = (TextView)findViewById(R.id.answer1);
answer12 = (TextView)findViewById(R.id.answer2);
or1 = (TextView)findViewById(R.id.or1);
or2 = (TextView)findViewById(R.id.or2);
double A = Double.parseDouble(a.getText().toString());
double B = Double.parseDouble(b.getText().toString());
double C = Double.parseDouble(c.getText().toString());
Formula(A,B,C);
}
My main graphical layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:onClick="SolveOnClick"
android:text="#string/solveButtonText" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="#string/quadFormText"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView4"
android:layout_marginTop="17dp"
android:layout_toLeftOf="#+id/textView4"
android:text="#string/A"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="#+id/aValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView4"
android:layout_alignTop="#+id/textView1"
android:layout_marginLeft="15dp"
android:ems="10"
android:inputType="numberDecimal" >
<requestFocus />
</EditText>
<EditText
android:id="#+id/bValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/aValue"
android:layout_below="#+id/aValue"
android:layout_marginTop="14dp"
android:ems="10"
android:inputType="numberDecimal" />
<EditText
android:id="#+id/cValue"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/bValue"
android:layout_below="#+id/bValue"
android:layout_marginTop="14dp"
android:ems="10"
android:inputType="numberDecimal" />
<TextView
android:id="#+id/answer1Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="#string/equals1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/answer2Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/answer1Text"
android:layout_below="#+id/answer1Text"
android:layout_marginTop="88dp"
android:text="#string/equals2"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/answer1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/answer1Text"
android:layout_toRightOf="#+id/answer1Text"
android:text="#string/answer11"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/or1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/answer1Text"
android:layout_below="#+id/answer1Text"
android:layout_marginTop="25dp"
android:text="#string/or1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/answer2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/answer2Text"
android:layout_toRightOf="#+id/answer1Text"
android:text="#string/answer12"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/or2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/answer2Text"
android:layout_below="#+id/answer2Text"
android:layout_marginTop="24dp"
android:text="#string/or2"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/equationText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_below="#+id/cValue"
android:layout_marginTop="14dp"
android:text="#string/equation"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/cValue"
android:layout_toLeftOf="#+id/textView4"
android:text="#string/C"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/bValue"
android:layout_alignLeft="#+id/textView3"
android:text="#string/B"
android:textAppearance="?android:attr/textAppearanceLarge" />
onCreate method:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
One of the logs when the program fails:
04-26 20:39:33.174: E/AndroidRuntime(16092): Caused by: java.lang.ClassCastException: android.widget.TextView
04-26 20:39:33.174: E/AndroidRuntime(16092): at calc.ulater.QuadCalcActivity.SolveOnClick(QuadCalcActivity.java:31)
I believe this has something to do with the decimal text boxes. The program worked well before I made them only take decimal numbers, but it also worked a time or two after. I'd rather not show the rest of my code, unless you guys are sure the problem lies there.
If this is the line that's screwing up:
EditText b = (EditText)findViewById(R.id.bValue);
Then its saying you're trying to cast a TextView to an EditText.
What's line 31? That one?
EditText a = (EditText)findViewById(R.id.aValue);
EditText b = (EditText)findViewById(R.id.bValue); //screws up somewhere here
EditText c = (EditText)findViewById(R.id.cValue);
equation = (TextView)findViewById(R.id.equationText);
answer11 = (TextView)findViewById(R.id.answer1);
answer12 = (TextView)findViewById(R.id.answer2);
or1 = (TextView)findViewById(R.id.or1);
or2 = (TextView)findViewById(R.id.or2);
all the initialization must be done in onCreate() and not in the constructor
Updated::
EditText a = (EditText)view.findViewById(R.id.aValue);
EditText b = (EditText)view.findViewById(R.id.bValue); //screws up somewhere here
EditText c = (EditText)view.findViewById(R.id.cValue);
equation = (TextView)view.findViewById(R.id.equationText);
answer11 = (TextView)view.findViewById(R.id.answer1);
answer12 = (TextView)view.findViewById(R.id.answer2);
or1 = (TextView)view.findViewById(R.id.or1);
or2 = (TextView)view.findViewById(R.id.or2);
if view is your parent view
Related
My project won't open on my device, it say's "Unfortunately,myApp has stopped".
this is my manifest:
this is my activity java :
package bismillah.project;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.content.Intent;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
public class Project2Activity extends Activity {
public static int a,b,c;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//coding start here!!
//input data
EditText pek=(EditText)findViewById(R.id.editText1);
String value=pek.getText().toString();
final int pekerja=Integer.parseInt(value);
EditText lam=(EditText)findViewById(R.id.editText2);
String value1=lam.getText().toString();
final int lama=Integer.parseInt(value1);
EditText up=(EditText)findViewById(R.id.editText3);
String value2=up.getText().toString();
final int upah=Integer.parseInt(value2);
EditText jum=(EditText)findViewById(R.id.editText4);
String value3=jum.getText().toString();
final int jumlah=Integer.parseInt(value3);
//button proses
Button button1=(Button)findViewById(R.id.Button1);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Spinner bibit = (Spinner)findViewById(R.id.spinner1);
TextView biaya = (TextView)findViewById(R.id.textView6);
if(bibit.getSelectedItem().toString().equals("Cabai Rp.100")){
a=pekerja*(lama*upah)+(jumlah*100);
biaya.setText("Biaya Rp." + a);
if(bibit.getSelectedItem().toString().equals("Tomat Rp.150")){
a=pekerja*(lama*upah)+(jumlah*150);
biaya.setText("Biaya Rp." + a);
if(bibit.getSelectedItem().toString().equals("Timun Rp.200")){
a=pekerja*(lama*upah)+(jumlah*200);
biaya.setText("Biaya Rp." + a);
}
}
}
}
});
//button reset
Button button2=(Button)findViewById(R.id.Button2);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
TextView biaya = (TextView)findViewById(R.id.textView6);
EditText pek=(EditText)findViewById(R.id.editText1);
EditText lam=(EditText)findViewById(R.id.editText2);
EditText up=(EditText)findViewById(R.id.editText3);
EditText jum=(EditText)findViewById(R.id.editText4);
pek.setText("");
lam.setText("");
up.setText("");
jum.setText("");
biaya.setText("");
}
});
//button pindah activity
Button button3=(Button)findViewById(R.id.Button3);
button3.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent i =new Intent(getApplicationContext(),activity2.class);
startActivity(i);
}
});
}
}
and this is my main.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/bg"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="#string/hello"
android:textColor="#color/warna"
android:textSize="20dp" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:text="Jumlah Pekerja :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" >
<requestFocus />
</EditText>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Lama Kerja :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Upah :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Jenis Bibit :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:entries="#array/list" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Jumlah Bibit :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="Large Text"
android:textColor="#color/warna2"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="20dp"
android:text="Proses" />
<Button
android:id="#+id/Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Reset" />
<Button
android:id="#+id/Button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Hasil Panen" />
</LinearLayout>
</LinearLayout>
I tried your code and I had to delete some stuff from your XML file because it was creating some bugs. It might be related to me but here's your XML I was able to use:
But please do not change your XML file before trying the solution below. If it still doesn't work, you should consider the elements I removed.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="hello"
android:textSize="20dp" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:text="Jumlah Pekerja :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" >
<requestFocus />
</EditText>
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Lama Kerja :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Upah :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Jenis Bibit :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Jumlah Bibit :"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/editText4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="20dp"
android:text="Proses" />
<Button
android:id="#+id/Button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Reset" />
<Button
android:id="#+id/Button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Hasil Panen" />
</LinearLayout>
</LinearLayout>
Next I created your Project2Activity java class and activity2 (pretty much empty since you gave no info about it).
So when trying to run your application you get the following error:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.application.so/com.example.application.so.Project2Activity}: java.lang.NumberFormatException: For input string: ""
and it is at :
at com.example.application.so.Project2Activity.onCreate(Project2Activity.java:24)
now if we consider this lines 23 and 24:
String value=pek.getText().toString(); // line 23
final int pekerja=Integer.parseInt(value); // line 24
The error is that you are trying to read (line 23) your editText Value at the creation of the activity, at that time, your editText is still blank which means value will be equal to "" (empty string).
What you want to do instead is to put your lines from 22 to 33 (the ones below) in a button click event, I tried putting them in your button 1 click event and your app doesn't crash any more:
EditText pek=(EditText)findViewById(R.id.editText1);
String value=pek.getText().toString();
final int pekerja=Integer.parseInt(value);
EditText lam=(EditText)findViewById(R.id.editText2);
String value1=lam.getText().toString();
final int lama=Integer.parseInt(value1);
EditText up=(EditText)findViewById(R.id.editText3);
String value2=up.getText().toString();
final int upah=Integer.parseInt(value2);
EditText jum=(EditText)findViewById(R.id.editText4);
String value3=jum.getText().toString();
final int jumlah=Integer.parseInt(value3);
So to summarize, the problem is that you are extracting empty strings from your editTexts and trying to make integers out of them. Instead try making that all reading and integer extracting process on the click of a button where your really need these inputs. just like get the inputs and the final moment.
You should pay attention to your logcat (error messages), it is quite helpful.
What you can also do is to verify that your editTexts are not empty while trying to extract strings from them and raise exception or Toast if they are empty. Nothing too complicated just something like:
if (value.equals("")):
// editText is empty so do something
You can refer to this link for further understanding of how to know when an editText is empty.
I have a slight problem that I have been stuck on. I have narrowed it down and it seems that my application is crashing on create when i am trying to find a text view. I do not understand why, maybe i have been looking at this to long and dont see the obvious.
Any help would be appreciated.
Thanks.
public class FinalActivity extends Activity {
EditText fullName;
EditText serialNumber;
EditText numberOfTicket;
EditText fullCost;
EditText discount;
EditText totalCostOfTickets;
EditText dinnerYesNo;
EditText numberForDinner;
EditText dinnerCost;
EditText vatTv;
EditText totalCost;
SharedPreferences thePrefs;// Shared preferences variable
SharedPreferences.Editor editor;// New editor to add to shared preferences
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_final);
thePrefs = getSharedPreferences(LoginActivity.FIRSTTIMEPREFS, 0);
editor = thePrefs.edit();
fullName = (EditText)findViewById(R.id.personsNameTv);
/*serialNumber = (EditText)findViewById(R.id.serialNumberTv);
numberOfTicket = (EditText)findViewById(R.id.numberOfTicketTv);
fullCost = (EditText)findViewById(R.id.fullCostBeforeTv);
discount = (EditText)findViewById(R.id.discountAmountTV);
totalCostOfTickets = (EditText)findViewById(R.id.totalTicketCostEt);
dinnerYesNo = (EditText)findViewById(R.id.dinnerAvailedTv);
numberForDinner = (EditText)findViewById(R.id.numberForDinnerTv);
dinnerCost = (EditText)findViewById(R.id.dinnerCostTv);
vatTv = (EditText)findViewById(R.id.vatTv);
totalCost = (EditText)findViewById(R.id.totalCostTv);*/
//fullName.setText (thePrefs.getString(PersonalInfoActivity.FULLNAME, ""));
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#404040"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="#+id/mainTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="15dp"
android:text="#string/ticketSummary"
android:textColor="#FFFFFF"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:id="#+id/promptTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:text="#string/confirmCorrectDetails"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<ScrollView
android:id="#+id/containerLayout"
android:layout_width="200dp"
android:layout_height="300dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_marginTop="15dp"
android:background="#drawable/redborder" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:paddingBottom="30dp"
android:paddingLeft="15dp"
android:paddingRight="10dp"
android:paddingTop="15dp" >
<TextView
android:id="#+id/personsNameTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/fullName"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/serialNumberTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/personsNameTv"
android:layout_marginTop="10dp"
android:text="#string/serialNumber"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/numberOfTicketTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/serialNumberTv"
android:layout_marginTop="10dp"
android:text="#string/numberOfTickets"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/fullCostBeforeTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/numberOfTicketTv"
android:layout_marginTop="10dp"
android:text="#string/fullCostBeforeDiscount"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/discountAmountTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/fullCostBeforeTv"
android:layout_marginTop="10dp"
android:text="#string/amountOfDisount"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/totalTicketCostEt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/discountAmountTV"
android:layout_marginTop="10dp"
android:text="#string/totalTicketCost"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/dinnerAvailedTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/totalTicketCostEt"
android:layout_marginTop="10dp"
android:text="#string/dinnerAvailed"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/numberForDinnerTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/dinnerAvailedTv"
android:layout_marginTop="10dp"
android:text="#string/numberForDinner"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/dinnerCostTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/numberForDinnerTv"
android:layout_marginTop="10dp"
android:text="#string/dinnerCost"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/vatTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/dinnerCostTv"
android:layout_marginTop="10dp"
android:text="#string/vat"
android:textColor="#FFFFFF"
android:textSize="15sp" />
<TextView
android:id="#+id/totalCostTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/vatTv"
android:layout_marginTop="10dp"
android:text="#string/totalCost"
android:textStyle="bold"
android:textColor="#FFFFFF"
android:textSize="15sp" />
</RelativeLayout>
</ScrollView>
<Button
android:id="#+id/confirmBtn"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_below="#+id/containerLayout"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:layout_marginTop="15dp"
android:background="#drawable/buttonshape"
android:onClick="confirmTicketOptions"
android:text="#string/confirm"
android:textStyle="bold" />
</LinearLayout>
There are two possible things possible. Either you want all Textviews or all EditText.
If you want all Textview then replace all your EditTextin java file with Textview.
Textview fullName;
fullName = (Textview )findViewById(R.id.personsNameTv);
If you want all EditText then replace all Textview in xml with EditText.
<EditText
android:id="#+id/personsNameTv"
.../>
In XML you are using Text-view and in java file you define it Edit-text
<TextView
android:id="#+id/personsNameTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/fullName"
android:textColor="#FFFFFF"
android:textSize="15sp" />
Replace with
<EditText
android:id="#+id/personsNameTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/fullName"
android:textColor="#FFFFFF"
android:textSize="15sp" />
My name is Marek.
I'm from Poland.
I have problem with my project.
java.lang.ClassCastException: android.widget.TextView cannot be cast andoid.widget.EditView
It's not working on Virtual Device and my devices
It's simple project for my learning development.
Sorry for my english.
java:
cylindr = (TextView)findViewById(R.id.cylindr);
na = (TextView)findViewById(R.id.na);
litry = (TextView)findViewById(R.id.litry);
spalanie = (TextView)findViewById(R.id.spalanie);
obrot = (TextView)findViewById(R.id.obrot);
ok = (Button)findViewById(R.id.ok);
cylindr = (EditText)findViewById(R.id.cylindr);
obroty = (EditText)findViewById(R.id.obroty);
paliwo = (EditText)findViewById(R.id.paliwo);
xml:
<TextView
android:id="#+id/spalanie"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/paliwo"
android:layout_alignParentTop="true"
android:layout_marginTop="24dp"
android:text="#string/Spalanie" />
<EditText
android:id="#+id/paliwo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/spalanie"
android:layout_marginLeft="18dp"
android:layout_marginTop="22dp"
android:ems="10"
android:inputType="number"
android:labelFor="#+id/paliwo"
android:singleLine="true" />
<TextView
android:id="#+id/litry"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/paliwo"
android:layout_alignBottom="#+id/paliwo"
android:layout_toRightOf="#+id/paliwo"
android:text="#string/litrow" />
<TextView
android:id="#+id/obrot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/paliwo"
android:layout_below="#+id/paliwo"
android:layout_marginTop="28dp"
android:text="#string/obroty" />
<EditText
android:id="#+id/obroty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/obrot"
android:layout_marginTop="24dp"
android:layout_toLeftOf="#+id/litry"
android:ems="10"
android:inputType="number"
android:labelFor="#id/obroty" />
<TextView
android:id="#+id/na"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/obroty"
android:layout_alignBottom="#+id/obroty"
android:layout_toRightOf="#+id/obroty"
android:text="#string/na" />
<TextView
android:id="#+id/cylindr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/obrot"
android:layout_below="#+id/obroty"
android:layout_marginTop="36dp"
android:text="#string/cylindry" />
<EditText
android:id="#+id/cylindry"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/cylindr"
android:layout_below="#+id/obroty"
android:layout_marginTop="65dp"
android:ems="10"
android:inputType="number"
android:labelFor="#id/cylindry" />
<Button
android:id="#+id/dalej"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/cylindry"
android:layout_marginTop="31dp"
android:layout_toRightOf="#+id/spalanie"
android:text="#string/ok" />
</RelativeLayout>
Please help me!
cylindr = (EditText)findViewById(R.id.cylindr);
Should be:
cylindr = (EditText)findViewById(R.id.cylindry);
You're currently using R.id.cylindr twice, along with a duplicate variable. You should use:
cylindr = (TextView)findViewById(R.id.cylindr);
na = (TextView)findViewById(R.id.na);
litry = (TextView)findViewById(R.id.litry);
spalanie = (TextView)findViewById(R.id.spalanie);
obrot = (TextView)findViewById(R.id.obrot);
ok = (Button)findViewById(R.id.ok);
cylindry = (EditText)findViewById(R.id.cylindry); //this is the line that was wrong
obroty = (EditText)findViewById(R.id.obroty);
paliwo = (EditText)findViewById(R.id.paliwo);
I'm trying to generate form elements from a template when the user clicks on a button. I created the template and the container layout for the new forms with XML. Its successfully generating the first form where I'm telling it to generate, but when I try to generate more forms beyond the first one its giving me an error: "the specified child already has a parent. You must call removeView() on the child's first parent". Any clue as to what I should do so as to generate more than one element? I've tried changing the id of the newly created forms but that's giving me a null pointer exception and crashing. Thank you.
public class MakeQuestion extends Activity implements OnClickListener{
private static final int MY_BUTTON = 9000;
int templateID = 1;
Button b;
Button target;
View insertPoint;
Button testTemplate;
View v1;
RelativeLayout.LayoutParams templateParams;
LayoutInflater vi;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.make_question);
Initialize();
}
public void Initialize(){
//button for adding new forms
b = (Button) findViewById(R.id.makeLayoutButton);
b.setOnClickListener(this);
//get the template form to be duplicated
vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v1 = vi.inflate(R.layout.form_template, null);
//set the params for the element that will have dynamically generated content below it
templateParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//container where forms will be contained in
insertPoint = findViewById(R.id.questionsContainer);
//view where new form will go below
View belowContainer = findViewById(R.id.questionTemplateFake);
//set id for layout params of view
belowContainer.setId(1);
//set rule for new forms to go below view 'belowContainer'
templateParams.addRule(RelativeLayout.BELOW, belowContainer.getId());
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.makeLayoutButton:
v1 = vi.inflate(R.layout.form_template, null);
//add view to the insertPoint
((LinearLayout) insertPoint).addView(v1);
break;
}
}
}
Added forms should go in "questionsContainer" which is set to be below "questionTemplateFake"
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:android1="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/grey_background" >
<RelativeLayout
android:id="#+id/relativeLayout1"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#8B459A"
android:baselineAligned="false"
android:clipToPadding="false" >
<ImageView
android:id="#+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/logo_small" />
<ImageView
android:id="#+id/imageView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="15dp"
android:src="#drawable/settings" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="15dp"
android:src="#drawable/search" />
</RelativeLayout>
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/relativeLayout1" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/relative12"
android:layout_width="270dp"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="WHAT IS YOUR QUESTION?" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/save_button"
android:layout_alignBottom="#+id/save_button"
android:layout_alignRight="#+id/textView1"
android:text="ADD PICTURE OR VIDEO"
android:textSize="10sp" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="25dp"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView1"
android:layout_marginTop="14dp"
android:background="#drawable/textlines"
android:ems="10"
android:hint="50 WORDS OR LESS"
android:inputType="textMultiLine"
android:paddingLeft="5dp" />
<Button
android:id="#+id/save_button"
android:layout_width="75dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_below="#+id/editText1"
android:layout_marginTop="16dp"
android:background="#drawable/purplebutton"
android:text="BROWSE"
android:textColor="#drawable/button_text_color"
android:textSize="10sp" />
<TextView
android:id="#+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/save_button"
android:layout_marginTop="25dp"
android:text="CREATE AN ANSWER" />
<RelativeLayout
android:id="#+id/questionTemplateFake"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:layout_alignParentLeft="true"
android:layout_below="#+id/TextView01" >
<Button
android:id="#+id/Button02eew"
android:layout_width="75dp"
android:layout_height="20dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/purplebutton"
android:text="BROWSE"
android:textColor="#drawable/button_text_color"
android:textSize="10sp" />
<EditText
android:id="#+id/EditText02"
android:layout_width="match_parent"
android:layout_height="25dp"
android:layout_above="#+id/Button02"
android:layout_alignParentLeft="true"
android:background="#drawable/textlines"
android:ems="10"
android:hint="50 WORDS OR LESS"
android:inputType="textMultiLine"
android:paddingLeft="5dp" >
<requestFocus />
</EditText>
<TextView
android:id="#+id/TextView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginRight="19dp"
android:layout_toLeftOf="#+id/Button02"
android:text="ADD PICTURE OR VIDEO"
android:textSize="10sp" />
</RelativeLayout>
<LinearLayout
android:id="#+id/questionsContainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="80dp"
android:layout_marginTop="20dp"
android:orientation="vertical"
android:layout_below="#+id/questionTemplateFake"
>
</LinearLayout>
</RelativeLayout>
</LinearLayout>
</ScrollView>
<Button
android:id="#+id/makeLayoutButton"
android:layout_width="100dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_below="#+id/scrollView1"
android:layout_marginRight="17dp"
android:layout_marginTop="79dp"
android:background="#drawable/purplebutton"
android:text="MORE OPTIONS"
android:textColor="#drawable/button_text_color"
android:textSize="10sp" />
</RelativeLayout>
You are trying to add the same instance over and over again. Thus the message that "specific child already exists". You would have to create a new template layout instance with different ID (I suppose) and then try to add it in.
So rather than:
((RelativeLayout) insertPoint).addView(v1, templateParams);
and adding v1 again. Create a new instance
v1 = vi.inflate(R.layout.form_template, null);
set the id for good measures and then add it again in view.
I suppose you don't need to set the id, but you can read more about how id's work here
In the onCreate() method I am updating 2 TextViews to be blank. For some reason it is setting two other TextViews to be blank. I have followed my logic and can not see what is going wrong.
here is my onCreate() method.
import android.widget.TextView;
public class MainActivity extends Activity {
private int purpleDrinks; //number of purple drinks
private int greenDrinks; //number of green drinks
private int redDrinks; //number of red drinks
private int blueDrinks; //number of blue drinks
private TextView purpleCount; //number of purple drinks display
private TextView greenCount; //number of green drinks display
private TextView redCount; //number of red drinks display
private TextView blueCount; //number of blue drinks display
private TextView purchaseConfirm; //displays what the user bought
private TextView outOfStock; //lets the user know when the item is out of stock.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if ( savedInstanceState == null ) // the app just started running
{
purpleDrinks = 10;
greenDrinks = 10;
redDrinks = 10;
blueDrinks = 10;
} // end if
purpleCount = (TextView) findViewById(R.id.purpleCount);
greenCount = (TextView) findViewById(R.id.greenCount);
redCount = (TextView) findViewById(R.id.redCount);
blueCount = (TextView) findViewById(R.id.blueCount);
purchaseConfirm = (TextView) findViewById(R.id.purchaseConfirm);
outOfStock = (TextView) findViewById(R.id.outOfStock);
purchaseConfirm.setText("");
outOfStock.setText("");
purpleCount.setText(purpleDrinks + "");
greenCount.setText(greenDrinks + "");
redCount.setText(redDrinks + "");
blueCount.setText(blueDrinks + "");
}
here is the xml code: the ids are correct.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background= "#D5E3EA"
tools:context=".MainActivity" >
<ImageButton
android:id="#+id/greenCann"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="25dp"
android:layout_marginTop="26dp"
android:src="#drawable/greencan" />
<ImageButton
android:id="#+id/redCann"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/greenCann"
android:layout_marginRight="25dp"
android:src="#drawable/redcan" />
<ImageButton
android:id="#+id/purpleCann"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/redCann"
android:layout_marginRight="25dp"
android:src="#drawable/purplecan" />
<ImageButton
android:id="#+id/blueCann"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/purpleCann"
android:layout_marginRight="25dp"
android:src="#drawable/bluecan" />
<Button
android:id="#+id/restockButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="54dp"
android:text="#string/restock" />
<TextView
android:id="#+id/purpleCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/purpleCann"
android:layout_marginBottom="18dp"
android:layout_toLeftOf="#+id/purpleCann"
android:text="TextView" />
<TextView
android:id="#+id/redCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/redCann"
android:layout_marginBottom="20dp"
android:layout_toLeftOf="#+id/redCann"
android:text="TextView" />
<TextView
android:id="#+id/greenCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/greenCann"
android:layout_marginBottom="20dp"
android:layout_toLeftOf="#+id/greenCann"
android:text="TextView" />
<TextView
android:id="#+id/blueCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/blueCann"
android:layout_marginBottom="20dp"
android:layout_toLeftOf="#+id/blueCann"
android:text="TextView" />
<TextView
android:id="#+id/outOfStock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/restockButton"
android:layout_centerHorizontal="true"
android:layout_marginBottom="14dp"
android:text="TextView" />
<TextView
android:id="#+id/purchaseConfirm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/outOfStock"
android:layout_alignBottom="#+id/outOfStock"
android:layout_alignLeft="#+id/outOfStock"
android:text="TextView" />
<TextView
android:id="#+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/greenCount"
android:layout_toLeftOf="#+id/restockButton"
android:text="#string/greenSoda2"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/redCount"
android:layout_alignBottom="#+id/redCount"
android:layout_alignLeft="#+id/textView5"
android:text="#string/redSoda"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/purpleCount"
android:layout_alignBottom="#+id/purpleCount"
android:layout_alignLeft="#+id/textView6"
android:text="#string/purpleSoda"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/blueCount"
android:layout_alignBottom="#+id/blueCount"
android:layout_alignLeft="#+id/textView7"
android:text="#string/blueSoda"
android:textAppearance="?android:attr/textAppearanceMedium" />
here is a screenshot of the app:
does anybody know what is going on?