In main.xml I made a row containing a TextView, an EditText and a "+" and "-" button.
Underneath that I made an "Add" button that will help you create a new row When you click the add button, you get an EditText and a Submit and Cancel button.
On "Submit" it outputs the EditText value to the TextView and creates the same row as the first one.
The numeric value "NewValueBox" should +1 when the "+" button is pressed.
But because I call it in another function it is not recognized by createNewAddButton() function in which the button is set up.
So in short:
"How do I change the value of NewValueBox when I click NewAddButton?"
Here's the code:
package com.lars.MyApp;
import com.google.ads.*;
import com.lars.MyApp.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.text.InputType;
import android.view.View;
import android.view.View.OnClickListener;
public class DrinkRecOrderActivity extends Activity {
int currentValue1 = 0;
int currentValueNew = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText firstValue = (EditText) findViewById(R.id.firstValue);
Button valuePlus = (Button) findViewById(R.id.valuePlus);
Button valueMinus = (Button) findViewById(R.id.valueMinus);
final Button addValue = (Button) findViewById(R.id.add);
final TableLayout tableLayout1 = (TableLayout) findViewById(R.id.tableLayout1);
final LinearLayout addValueRow = (LinearLayout) findViewById(R.id.addValueRow);
final EditText addNewValue = (EditText) findViewById(R.id.addNewValue);
final Button submitNewValue = (Button) findViewById(R.id.submitNewValue);
final Button cancelNewValue = (Button) findViewById(R.id.cancelNewValue);
// BEGIN ONCLICKLISTENERS
valuePlus.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
plusValue();
firstValue.setText("" + currentValue1);
}
});
valueMinus.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
minValue();
firstValue.setText("" + currentValue1);
}
});
addValue.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
addValueRow.setVisibility(View.VISIBLE);
addValue.setVisibility(View.GONE);
}
});
cancelNewValue.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
addValueRow.setVisibility(View.GONE);
addValue.setVisibility(View.VISIBLE);
}
});
submitNewValue.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
tableLayout1.addView(createnewRow());
addValueRow.setVisibility(View.GONE);
addValue.setVisibility(View.VISIBLE);
addNewValue.setText("");
}
});
// END ONCLICKLISTENERS
// Look up the AdView as a resource and load a request.
AdView adView = (AdView) this.findViewById(R.id.adView);
adView.loadAd(new AdRequest());
}
public TableRow createNewRow() {
final TableRow newRow = new TableRow(this);
final EditText addNewValue = (EditText) findViewById(R.id.addNewValue);
newRow.addView(createNewTextView(addNewValue.getText().toString()));
newRow.addView(createNewValueBox());
newRow.addView(createNewAddButton());
newRow.addView(createNewMinusButton());
return newRow;
}
public TextView createNewTextView(String text) {
final TextView textView = new TextView(this);
textView.setText(text);
return textView;
}
public EditText createNewValueBox() {
EditText NewValueBox = new EditText(this);
NewValueBox.setHint("0");
NewValueBox.setInputType(InputType.TYPE_CLASS_NUMBER);
return NewValueBox;
}
public Button createNewAddButton() {
final Button NewAddButton = new Button(this);
NewAddButton.setText("+");
NewAddButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
plusNew();
//NewValueBox.setText("" + currentValueNew);
}
});
return NewAddButton;
}
public Button createNewMinusButton() {
final Button NewMinusButton = new Button(this);
NewMinusButton.setText("-");
return NewMinusButton;
}
// BEGIN PLUS AND MIN FUNCTIONS
public void plusNew() {
if (currentValueNew <= 999) {
currentValueNew = currentValueNew + 1;
}
}
public void plusValue() {
if (currentValue1 <= 999) {
currentValue1 = currentValue1 + 1;
}
}
public void minValue() {
if (currentValue1 >= 1) {
currentValue1 = currentValue1 - 1;
}
}
// END PLUS AND MIN FUNCTIONS
}
Add IDs for your Views so you can later reference them. Make 3 private static int field in your activity(the ID for NewValueBox, NewAddButton and NewMinusButton):
private static int edt = 1;
private static int add = 1001;
private static int minus = 2001;
Then in your createNewValueBox() method set the ID:
NewValueBox.setId(edt);
edt++;
Do the same for the NewAddButton and the NewMinusButton:
NewAddButton.setId(add);
add++;
NewMinusButton.setId(minus);
minus++;
Then in your listener for the buttons find out exactly which add button has been clicked and set the text in the corresponding EditText:
NewAddButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
plusNew();
int tmp = v.getId();
EditText temp = (EditText) findViewById(1 + (tmp - 1001));
temp.setText("" + currentValueNew);
}
Kind of hackish method.
Related
I have an app where I would like to be able to click on a button, A, and show a certain set of information. Then click the back button and click on button B and show a different set of information. I have coded a test TextView into the Drinks.java file in order to begin the process by confirming what is being passed along. Currently whatever button I push first is getting stuck in the variable. So for example if I push button A, then push the back arrow and push button B, button A is still showing up in the textView. I tried making the Strings empty within the on click listener, to "clear them out" as it were, but that isn't working. Is there a way to wipe out what is in the variable and reassign something else? Or does my problem lie elsewhere?
Bar.java
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class Bar extends Activity{
String setBarTest = MainActivity.setBar;
String barNameHolder, picHolder, barContactHolder, barPhoneHolder;
int imageInt, textInt1,textInt2, textInt3;
TextView setBarName, setBarContact,setBarPhone;
ImageView barPic;
Button viewAll, beer, wine, mixedDrinks, other, getTaxi;
static String setDrinkType = "";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bar);
Button viewAll = (Button)findViewById(R.id.btnviewAll);
Button beer = (Button)findViewById(R.id.btnBeer);
Button wine = (Button)findViewById(R.id.btnWine);
Button mixedDrinks = (Button)findViewById(R.id.btnMixedDrinks);
Button other = (Button)findViewById(R.id.btnOther);
Button getTaxi = (Button)findViewById(R.id.btnTaxi);
barPic = (ImageView) findViewById(R.id.barPic);
String picHolder = "drawable/"+setBarTest;
int imageInt = getResources().getIdentifier(picHolder, null, getPackageName());
barPic.setImageResource(imageInt);
setBarName = (TextView)findViewById(R.id.barName);
String barNameHolder = "#string/"+setBarTest;
int textInt1 = getResources().getIdentifier(barNameHolder, null, getPackageName());
setBarName.setText(textInt1);
setBarContact = (TextView)findViewById(R.id.barContact);
String barContactHolder = "#string/"+setBarTest+"Contact";
int textInt2 = getResources().getIdentifier(barContactHolder, null, getPackageName());
setBarContact.setText(textInt2);
setBarPhone = (TextView)findViewById(R.id.barPhone);
String barPhoneHolder = "#string/"+setBarTest+"Phone";
int textInt3 = getResources().getIdentifier(barPhoneHolder, null, getPackageName());
setBarPhone.setText(textInt3);
viewAll.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = (new Intent(Bar.this, Drinks.class));
startActivity(i);
}
});
beer.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
setDrinkType = "";
setDrinkType = "Beer";
Intent i = (new Intent(Bar.this, Drinks.class));
startActivity(i);
}
});
wine.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
setDrinkType = "";
setDrinkType = "Wine";
Intent i = (new Intent(Bar.this, Drinks.class));
startActivity(i);
}
});
mixedDrinks.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
setDrinkType = "";
setDrinkType = "Mixed Drink";
Intent i = (new Intent(Bar.this, Drinks.class));
startActivity(i);
}
});
other.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
setDrinkType = "";
setDrinkType = "Other";
Intent i = (new Intent(Bar.this, Drinks.class));
startActivity(i);
}
});
getTaxi.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = (new Intent(Bar.this, Taxi.class));
startActivity(i);
}
});
}
}
Drinks.java
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class Drinks extends Activity{
TextView drinkHolder;
public static String drinkType = Bar.setDrinkType;
String drinkTestHolder="";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drinks);
drinkTestHolder = drinkType;
drinkHolder = (TextView)findViewById(R.id.drinkTest);
//String barNameHolder = "#string/"+drinkType;
//int textInt1 = getResources().getIdentifier(barNameHolder, null, getPackageName());
drinkHolder.setText(drinkTestHolder);
}
}
Please, use instead for instance the intent sent to the launching Activity:
How do I get extra data from intent on Android?
I have a question, as I can get all the data that has been inserted into the edit text? the edit text is on a loop, I need a way to get those values and work with them, try using an array but I get errors. could help me? any idea? Help!
package com.example.test;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
public class MainActivity extends Activity {
public static final String TAG = MainActivity.class.getSimpleName();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText count = (EditText) findViewById(R.id.count);
final Button generate = (Button) findViewById(R.id.generate);
final LinearLayout container = (LinearLayout) findViewById(R.id.container);
generate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int numberOfControlsToGenerate = 0;
try {
numberOfControlsToGenerate = Integer.parseInt(count.getText().toString().trim());
} catch (NumberFormatException e) {
Log.e(TAG, e.getMessage(), e);
}
if (numberOfControlsToGenerate > 0) {
if (container.getChildCount() > 0) {
container.removeAllViews();
}
for (int counter = 0; counter < numberOfControlsToGenerate; counter++) {
addEditText(container);
}
}
}
});
}
private void addEditText(LinearLayout container) {
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
EditText editTextToAdd = new EditText(this);
editTextToAdd.setLayoutParams(params);
container.addView(editTextToAdd);
}
}
You can create multiple edittext by using array.
public class MainActivity extends Activity{
EditText[] sample_et;
int numberOfControlsToGenerate = 10;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
LinearLayout root_layout = (LinearLayout)findViewById(R.id.root);
sample_et = new EditText[numberOfControlsToGenerate];
//numberOfControlsToGenerate is decleres statically you can get the count from edit text
for(int i = 0; i < count; i++ ){
sample_et[i] = new EditText(this);
root_layout.addView(sample_et[i]);
}
}
}
Add setTag when you create dynamic EditText
add line in addEditText(LinearLayout container) method
private void addEditText(LinearLayout container) {
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
EditText editTextToAdd = new EditText(this);
editTextToAdd.setLayoutParams(params);
editTextToAdd.setTag(editTextToAdd); //Add this Line
container.addView(editTextToAdd);
}
Write code onClick listener on any Button
getvalue.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
for (int i = 0; i < container.getChildCount(); i++) {
if(container.getChildAt(i) instanceof EditText) {
EditText et = (EditText) container.getChildAt(i).getTag();
if(et != null) {
Log.i("<Tag Name>", et.getText().toString());
}
}
}
}
});
Im having problem sharing a global variable that I need to retain across multiple activities. This variable is created in TextPlay class and copied onto DailyDataEntry class. I have done some research sharing variables between two activities using Intent but Im looking to share that variable to multiple classes. I think I will have to extends Application but all my other classes are extending Activity already. How am I supposed to extend Application while extending Activity? Thanks a million
///TextPlay Class///
package com.armstrong.y.android.app;
import java.util.Random;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.text.InputType;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ToggleButton;
public class TextPlay extends Activity implements View.OnClickListener {
Button chkCmd;
ToggleButton passTog;
EditText input;
TextView display;
EditText etUserId;
Button btnUserId;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
baconAndEggs();
passTog.setOnClickListener(this);
chkCmd.setOnClickListener(this);
// Share variables between classes controls
etUserId = (EditText) findViewById(R.id.etUserId);
btnUserId = (Button) findViewById(R.id.btnUserId);
}
private void baconAndEggs() {
// TODO Auto-generated method stub
chkCmd = (Button) findViewById(R.id.bResults);
passTog = (ToggleButton) findViewById(R.id.tbPassword);
input = (EditText) findViewById(R.id.etCommands);
display = (TextView) findViewById(R.id.tvResults);
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bResults:
// get the text from the command box then convert it to string
String check = input.getText().toString();
display.setText(check);
if (check.contentEquals("left")) {
display.setGravity(Gravity.LEFT);
} else if (check.contentEquals("center")) {
display.setGravity(Gravity.CENTER);
} else if (check.contentEquals("right")) {
display.setGravity(Gravity.RIGHT);
} else if (check.contentEquals("blue")) {
display.setTextColor(Color.BLUE);
display.setText("blue");
} else if (check.contains("hellow")) {
Random crazy = new Random();
display.setText("hello!!!!");
display.setTextSize(crazy.nextInt(75));
display.setTextColor(Color.rgb(crazy.nextInt(255),
crazy.nextInt(255), crazy.nextInt(255)));
switch (crazy.nextInt(3)) {
case 0:
display.setGravity(Gravity.LEFT);
break;
case 1:
display.setGravity(Gravity.CENTER);
break;
case 2:
display.setGravity(Gravity.RIGHT);
break;
}
} else {
display.setText("invalid");
display.setGravity(Gravity.CENTER);
display.setTextColor(Color.BLACK);
}
break;
case R.id.tbPassword:
// If toggle button is set to ON, password will be ***
if (passTog.isChecked()) {
input.setInputType(InputType.TYPE_CLASS_TEXT
| InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
// if toggle is off, its going be plain text
input.setInputType(InputType.TYPE_CLASS_TEXT);
}
break;
}
}
}
///DailyDataEntry Class///
package com.armstrong.y.android.app;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class DailyDataEntry extends Activity {
String strdate;
EditText etGetDate;
Calendar calendarDateToday = Calendar.getInstance();
Calendar calendarDateNext = Calendar.getInstance();
Calendar calendarDatePrevious = Calendar.getInstance();
int counterNext = 0;
int counterPrevious = 0;
Button btnTodayDate;
Button btnPreviousDate;
Button btnGetNextDate;
EditText etDailyCaloriesIn;
EditText etDailyCaloriesOut;
EditText etDailyAnxietyLevel;
EditText etDailySleepQuality;
TextView tvUserId;
Button btnSubmit;
Button btnReset;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.daily_data_entry);
// Toast Message Warning
Toast.makeText(getApplicationContext(),
"DO NOT LEAVE FIELD BLANK OR CRASH IS ON YOU!",
Toast.LENGTH_LONG).show();
btnTodayDate = (Button) findViewById(R.id.btnGetTodayDate);
btnPreviousDate = (Button) findViewById(R.id.btnGetPreviousDate);
btnGetNextDate = (Button) findViewById(R.id.btnGetNextDate);
etGetDate = (EditText) findViewById(R.id.etGetDate);
btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnReset = (Button) findViewById(R.id.btnReset);
etDailyCaloriesIn = (EditText) findViewById(R.id.etDailyCaloriesIn);
etDailyCaloriesOut = (EditText) findViewById(R.id.etDailyCaloriesOut);
etDailyAnxietyLevel = (EditText) findViewById(R.id.etDailyAnxietyLevel);
etDailySleepQuality = (EditText) findViewById(R.id.etDailySleepQuality);
tvUserId = (TextView) findViewById(R.id.tvUserId);
// When Submit Button is clicked
btnSubmit.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Grab User Input from EditText and Convert input String to
// Integer
int check1 = Integer.parseInt(etDailyCaloriesIn.getText()
.toString());
int check2 = Integer.parseInt(etDailyCaloriesOut.getText()
.toString());
int check4 = Integer.parseInt(etDailyAnxietyLevel.getText()
.toString());
int check5 = Integer.parseInt(etDailySleepQuality.getText()
.toString());
strdate = etGetDate.getText().toString();
// Run Legal Value Integrity Check
if (strdate.length() != 8) {
etGetDate.setText("Please enter in the correct format.");
} else if (strdate.equals("")) {
etGetDate.setText("Please enter a date.");
} else if (check1 > 10 || check1 < 1) {
etDailyCaloriesIn.setText("Incorrect Value!");
} else if (check2 > 10 || check2 < 1) {
etDailyCaloriesOut.setText("Incorrect Value!");
} else if (check4 > 10 || check4 < 1) {
etDailyAnxietyLevel.setText("Incorrect Value!");
} else if (check5 > 10 || check5 < 1) {
etDailySleepQuality.setText("Incorrect Value!");
} else {
etGetDate.setText("Submited!");
etDailyCaloriesIn.setText("Submited!");
etDailyCaloriesOut.setText("Submited!");
etDailyAnxietyLevel.setText("Submited!");
etDailySleepQuality.setText("Submited!");
}
}
});
// When Reset Button is Clicked
btnReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String empty = "";
etDailyCaloriesIn.setText(empty);
etDailyCaloriesOut.setText(empty);
etDailyAnxietyLevel.setText(empty);
etDailySleepQuality.setText(empty);
etGetDate.setText(empty);
}
});
// Capture Today's Date
btnTodayDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
strdate = sdf.format(calendarDateToday.getTime());
etGetDate.setText(strdate);
}
});
// Capture Previous's Date
btnPreviousDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
if (counterPrevious == 0) {
calendarDatePrevious.add(Calendar.DATE, -1);
}
strdate = sdf.format(calendarDatePrevious.getTime());
etGetDate.setText(strdate);
counterPrevious++;
}
});
// Capture Next's Date
btnGetNextDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
if (counterNext == 0) {
calendarDateNext.add(Calendar.DATE, +1);
}
strdate = sdf.format(calendarDateNext.getTime());
etGetDate.setText(strdate);
counterNext++;
}
});
}
}
Create class that will extends to Application and use it in the following manner whenever you need it:
MyApplication myAppHelper = (MyApplication) context.getApplication();
myAppHelper.setWhatever(whatever);
Whatever whatever = myAppHelper.getWhatever();
I am getting zero as the output. I couldnt find any errors in it
any help would be great.
full code:
package com.equbez.resistor_decoder;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Second extends Activity {
int i,b1,b2,b3,result,four;
String one,two,three;
String arr[]={"black","brown","red","orange","yellow","green","blue","violet","grey","white"};
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
EditText etone=(EditText) findViewById(R.id.editText1);
one=etone.getText().toString();
for(i=0;i<9;i++) {
if(one.equalsIgnoreCase(arr[i])) {
b1=i;
}
}
EditText ettwo=(EditText) findViewById(R.id.editText2);
two=ettwo.getText().toString();
for(i=0;i<9;i++) {
if(two.equalsIgnoreCase(arr[i])) {
b2=i;
}
}
EditText etthree=(EditText) findViewById(R.id.editText3);
three=etthree.getText().toString();
for(i=0;i<9;i++) {
if(three.equalsIgnoreCase(arr[i])) {
b3=i;
}
}
result=b2+b2+b3;
Button bfour=(Button) findViewById(R.id.button4);
bfour.setOnClickListener( new OnClickListener() {
#Override
public void onClick(View V) {
TextView tv=(TextView) findViewById(R.id.textView4);
tv.setText(""+result);
}
});
}
}
any help would be great.
initially the EditTextView will be empty when the activity is called. so you always get an empty string which you are comparing to the Strings in arr[].
b1, b2, b3 are initialized to default values ie.,, '0' hence result is always '0'
write all the getText code in the bfour.setOnClickListener()
or else implement TextWatcher and use onTextChanged method
use
for(i = 0 ; i< arr.length ;i++)
do something
In your code if you are inputting white its not getting compared
Are you giving any spaces while inputing the string at the end? once check the length of the string that you give as input whether its exact or not
Here i have re-coded with the changes, try out this code,
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Second extends Activity
{
private static int b1,b2,b3,result,four;
private String one,two,three;
private String arr[]={"black","brown","red","orange","yellow","green","blue","violet","grey","white"};
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
EditText etone=(EditText) findViewById(R.id.editText1);
one=etone.getText().toString();
for( int i = 0 ; i < 10; i++ )
{
if(one.trim().equalsIgnoreCase(arr[i].trim()))
{
b1=i;
break;
}
}
EditText ettwo=(EditText) findViewById(R.id.editText2);
two=ettwo.getText().toString();
for( int i = 0 ; i < 10; i++ )
{
if(two.trim().equalsIgnoreCase(arr[i].trim()))
{
b2=i;
break;
}
}
EditText etthree=(EditText) findViewById(R.id.editText3);
three=etthree.getText().toString();
for( int i = 0 ; i < 10; i++ )
{
if(three.trim().equalsIgnoreCase(arr[i].trim()))
{
b3=i;
break;
}
}
result=b2+b2+b3;
Button bfour=(Button) findViewById(R.id.button4);
bfour.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View V)
{
TextView tv=(TextView) findViewById(R.id.textView4);
tv.setText( String.valueOf(result));
}
});
}
}
I got the problem. You have to run your all 3 loops after clicking the button. you have done that on Oncreate(). So you always get 0.
see below:
int i, b1, b2, b3, result, four;
String one, two, three;
String arr[] = { "black", "brown", "red", "orange", "yellow", "green", "blue", "violet", "grey", "white" };
EditText etone, ettwo, etthree;
Button bfour;
TextView tv;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
etone = (EditText) findViewById(R.id.editText1);
ettwo = (EditText) findViewById(R.id.editText2);
etthree = (EditText) findViewById(R.id.editText3);
bfour = (Button) findViewById(R.id.button4);
bfour.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View V) {
one = etone.getText().toString();
for (i = 0; i < arr.length; i++) {
if (one.equals(arr[i])) {
b1 = i;
System.out.println("dhrupal one="+b1);
}
}
two = ettwo.getText().toString();
for (i = 0; i < arr.length; i++) {
if (two.equals(arr[i])) {
System.out.println("dhrupal one="+two);
b2 = i;
}
}
three = etthree.getText().toString();
for (i = 0; i < arr.length; i++) {
if (three.equals(arr[i])) {
System.out.println("dhrupal one="+three);
b3 = i;
}
}
result = b1 + b2 + b3;
tv = (TextView) findViewById(R.id.textView4);
tv.setText("result=" + result);
}
});
}
i want to set a "0" in each "empyt" TextBoxes if the user clicks one button, to avoid an error in the app, any help? i dont know what to do
package com.doko.most;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Button;
import android.view.View;
public class doko extends Activity {
private EditText bx1;
private EditText bx2;
private TextView txt3;
private Button btncalcular;
private Button btnreset;
private double variable1 = 0;
private double variable2 = 0;
private double variable3 = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initControls();
}
private void initControls()
{
bx1 = (EditText)findViewById(R.id.bx1);
bx2 = (EditText)findViewById(R.id.bx2);
txt3 = (TextView)findViewById(R.id.txt3);
btncalcular = (Button)findViewById(R.id.btncalcular);
btnreset = (Button)findViewById(R.id.btnreset);
btncalcular.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ calcular(); }});
btnreset.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ reset(); }});
}
private void calcular()
{
variable1 = Double.parseDouble(bx1.getText().toString());
variable2 = Double.parseDouble(bx2.getText().toString());
variable3 = Math.sqrt(1*2/3600);
txt3.setText(Double.toString(variable3));
}
private void reset(){
bx1.setText("");
bx2.setText("");
}
}
try something like this, quick and dirty:
private void calcular() {
try {
variable1 = Double.parseDouble(bx1.getText().toString());
}
catch(NumberFormatException e) {
bx1.setText("0");
}
try {
variable2 = Double.parseDouble(bx2.getText().toString());
}
catch(NumberFormatException e) {
bx2.setText("0");
}
variable3 = Math.sqrt(1*2/3600);
txt3.setText(Double.toString(3));
}
set up Hint property at your EditText
Ex.
and check it when you getText()
use str.isEmpty() and str.length to check user's inpupt
another way :
set up inputType for the EditText to number and setup Input filter
ex.
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(4);
input.setFilters(FilterArray);