Develop Reference

how to toast message inside the filtering method?

Interface:-
I want to make a toast message, if user did not choose any subject, it will toast message "Please choose subject". There is no error, the issue was I dont know where to put the coding to display the toast message when needed.
Coding:-
#Override
public void onClick(View v) {
final MediaPlayer mediaPlayer = MediaPlayer.create(FilterTuitionCentreActivity.this, R.raw.soundeffect1);
if (v == filterButton) {
mediaPlayer.start();
filterBtnFlag = true;
if(spLocation.getSelectedItem() == null){
return;
}
/*if(!(spSubject.getSelectedItem().toString().equalsIgnoreCase("Subject")
|| spSubject.getSelectedItem().toString().equalsIgnoreCase("Choose Subject"))){
Toast.makeText(FilterTuitionCentreActivity.this, "Please choose subject.", Toast.LENGTH_SHORT).show();
}*/
else {
loadFilteredInstitutesList("Advertisement");
}
}
}

You need a move that validation logic up and return without go further if any validation fails.
#Override
public void onClick(View v) {
//add your spinner validity checking here
if(!(spSubject.getSelectedItem().toString().equalsIgnoreCase("Subject")
||
spSubject.getSelectedItem().toString().equalsIgnoreCase("Choose Subject"))){
Toast.makeText(FilterTuitionCentreActivity.this, "Please choose subject.", Toast.LENGTH_SHORT).show();
return;
}
final MediaPlayer mediaPlayer = MediaPlayer.create(FilterTuitionCentreActivity.
this, R.raw.soundeffect1);
if (v == filterButton) {
mediaPlayer.start();
filterBtnFlag = true;
if(spLocation.getSelectedItem() == null){
return;
}
loadFilteredInstitutesList("Advertisement");
}
}

How to change background of button on next click

Currently I have a list of TextViews whose background get changed when click for the first time. But I also want when user clicks on the second time its background should again change and vice versa.
With my existing code I am only able to change background for the first click, when I am clicking it again its background is not changing.
Here is my code:
public void onClick(View v) {
switch (v.getId()) {
case R.id.goalText1:
if (count <= 2) {
goals.add(mGoal1.getText().toString());
mGoal1.setTextColor(getResources().getColor(R.color.black));
mGoal1.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText2:
if (count <= 2) {
goals.add(mGoal2.getText().toString());
mGoal2.setTextColor(getResources().getColor(R.color.black));
mGoal2.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText3:
if (count <= 2) {
goals.add(mGoal3.getText().toString());
mGoal3.setTextColor(getResources().getColor(R.color.black));
mGoal3.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText4:
if (count <= 2) {
goals.add(mGoal4.getText().toString());
mGoal4.setTextColor(getResources().getColor(R.color.black));
mGoal4.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText5:
if (count <= 2) {
goals.add(mGoal5.getText().toString());
mGoal5.setTextColor(getResources().getColor(R.color.black));
mGoal5.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText6:
if (count <= 2) {
goals.add(mGoal6.getText().toString());
mGoal6.setTextColor(getResources().getColor(R.color.black));
mGoal6.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.goalText7:
if (count <= 2) {
goals.add(mGoal7.getText().toString());
mGoal7.setTextColor(getResources().getColor(R.color.black));
mGoal7.setBackgroundColor(getResources().getColor(R.color.white));
count++;
} else {
Toast.makeText(SelectGoal.this, "cant select more", Toast.LENGTH_SHORT).show();
}
break;
case R.id.btnGoal:
Intent intent = new Intent(this, fiteness_level_selection.class);
try {
obj.put("SelectedGoal", goals);
} catch (Exception e) {
e.printStackTrace();
}
intent.putExtra("GoalJson", obj.toString());
startActivity(intent);
break;
}
So can anybody suggest me any easy way to achieve it.

Set a boolean array in your activity.
//suppose you've 3 textviews within listview
public boolean isTransparent[] = {false,false,false};
And then do this in your onClick method.
public void onOnclick(View v){
switch (v.getId()) {
//foreach textview do this
case R.id.textView1 :
int color;
if (isTransparent[0])
color = getResources().getColor(android.R.color.transparent);
else
color = getResources().getColor(R.color.white);
isTransparent[0]=!isTransparent[0];
textview1.setBackgroundColor(color);
break;
case R.id.textView2:
// now check for isTransparent[1]
and so on ...
...
}
}

As What I am understand is you want Change background for that you have take bool variable and in Button click you have to check the bool value.
Boolean click_firsttime = false;
Inside your Button click
use this way
If(click_firsttime == false){
//perform task
// and set bool value to true
click_firsttime = true;
}else{
// perform task and set bool value
click_firsttime = false;
}

First create a boolean :
private boolean foo = true;
Then change your code like this :
public void onClick(View v) {
switch (v.getId()) {
case R.id.goalText1:
if (foo) {
goals.add(mGoal1.getText().toString());
mGoal1.setTextColor(getResources().getColor(R.color.black));
mGoal1.setBackgroundColor(getResources().getColor(R.color.white));
count++;
foo = false;
} else {
// set background to another color
foo = true;
}
break;

Android: Previous page button, without losing data

I have need some help to achieve the following:
When I click on my previous-button I want the application to go to the previous page without losing my data. I already added the previous-button to the application, but when I click it my application goes to the main page instead of the previous page.
My code:
Button next,previous;
next = (Button)findViewById(R.id.work_next);
previous = (Button)findViewById(R.id.work_previous);
previous.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intentSignUP = new Intent(getApplicationContext(), filldetails.class);
startActivity(intentSignUP);
finish();
}
});
next.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
boolean allValues = true;
String comp="",desg="",fromdate="",todate="",role_d="",technologies_used="";
if(companyName.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
else
{
comp= companyName.getText().toString();
//Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
if(designation.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
else
{
desg = designation.getText().toString();
//Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
if(fromDate.getText().toString().length()<8 || fromDate.getText().toString().length()>10 ||fromDate.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(),"Please enter valid Date",Toast.LENGTH_SHORT).show();
}
else
{
fromdate = fromDate.getText().toString();
}
if(toDate.getText().toString().length()<8 || toDate.getText().toString().length()>10 ||toDate.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(),"Please enter valid Date",Toast.LENGTH_SHORT).show();
}
else
{
todate = toDate.getText().toString();
}
if(role_desc.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
else
{
role_d = role_desc.getText().toString();
}
if(technologiesUsed.getText().toString().equals(""))
{
allValues = false;
Toast.makeText(getApplicationContext(), "Please enter all the fields",Toast.LENGTH_SHORT).show();
}
else
{
technologies_used = technologiesUsed.getText().toString();
}
if(allValues)
{
Intent moveToNext = new Intent(getApplicationContext(),skills.class);
moveToNext.putExtra("comp_name",comp);
moveToNext.putExtra("desc",desg);
moveToNext.putExtra("role_d",role_d);
moveToNext.putExtra("from_date",fromdate);
moveToNext.putExtra("to_date",todate);
moveToNext.putExtra("technologies_used",technologies_used);
moveToNext.putExtra("iscurrent",isCurrent.isChecked());
moveToNext.putExtra("aboutme",getIntent().getStringExtra("aboutme"));
moveToNext.putExtra("address",getIntent().getStringExtra("address"));
startActivity(moveToNext);
finish();
}
else
{
Toast.makeText(getApplicationContext(), "Please provide all values", Toast.LENGTH_SHORT).show();
}
}
});
}

You don't need to start the activity to go to previous activity (if you haven't called finish() on that), just close the current activity and it will go to previous activity and data will be intact.
Change your onClick method of previous button like this
#Override
public void onClick(View v) {
finish();
}
Note: If you have closed the previous activity by calling finish() then remove that code, otherwise data will not be intact without modifying your code in that activity.

Display toast for empty fields when user submits data

I have an activity in which there are three EditTexts: First Name, Middle Name, Last Name, and a Submit button. If the user submits with a field blank, a different toast appears for different field. Here's is an example when button will be clicked!:

I'll assume you can figure out how to use a button listener yourself. Inside that button listener, you can use this code:
// create EditText references
EditText etFirstName = (EditText)findViewById(R.id.firstName);
EditText etMiddleName = (EditText)findViewById(R.id.middleName);
EditText etLastName = (EditText)findViewById(R.id.lastName);
// boolean variables that each represent whether or not the each field is blank
// if the EditText length is 0, it's true (blank); otherwise, it's false (filled)
boolean firstNameBlank = etFirstName.length() == 0;
boolean middleNameBlank = etMiddleName.length() == 0;
boolean lastNameBlank = etLastName.length() == 0;
if (firstNameBlank && middleNameBlank && lastNameBlank) {
// toast all three blank
}
else if (firstNameBlank && middleNameBlank) {
// toast just first and middle are blank
}
else if (firstNameBlank && lastNameBlank) {
// toast just first and last are blank
}
else if (middleNameBlank && lastNameBlank) {
// toast just middle and last are blank
}
else if (firstNameBlank) {
// toast just first is blank
}
else if (middleNameBlank) {
// toast just middle is blank
}
else if (lastNameBlank) {
// toast just last is blank
}
else {
// none are blank
}

Try this way
EditText e = (EditText)findViewById(R.id.EDITTEXT));
if(e.getText().length == 0){
//Show Toast
}else{
//continue your code
}

implement onClick() event of your submit button as below:
#Override
public void onClick(View view) {
super.onClick(view);
switch (view.getId()) {
case R.id.btnSubmit:
if(edtFirstName.getText().toString().length() < 1){
Toast.makeText(this, "please fill all boxes.",Toast.LENGTH_LONG).show();
}else if(edtSecondName.getText().toString().length() < 1){
Toast.makeText(this, "please fill middle name and last name.",Toast.LENGTH_LONG).show();
} else if(edtLastName.getText().toString().length() < 1){
Toast.makeText(this, "please fill last name.",Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this, "please wait...processing.",Toast.LENGTH_LONG).show();
}
break;
default:
break;
}
}

Advice needed with edit text fields

Hey guys I have an Activity with some EditText fields.
The user needs to fill up all the text fields before pressing the save Button.
Here is what I thought would work. I checked the texts entered in the EditText fields, if the text is not null, then the respective data is saved in
the data base, but if the text is null, a Toast is displayed displaying a message to re enter the text. here's the code:
account_Number.setText(null);
customer_Number.setText(null);
account_Holder.setText(null);
bank_Name.setText(null);
branch_Name.setText(null);
branch_Address.setText(null);
Ifsc.setText(null);
Micr.setText(null);
current_Balance.setText(null);
AddAccount = (Button) findViewById(R.id.addAccount);
AddAccount.setOnClickListener(this);
}
// only after all the fields have been filled, should the message data added
// successfully be displayed.
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.addAccount:// try making the user enter in all the fields
boolean work = true;
if (account_Number.getText() != null
&& customer_Number.getText() != null
&& account_Holder.getText() != null
&& bank_Name.getText() != null
&& branch_Name.getText() != null
&& branch_Address.getText() != null
&& Ifsc.getText() != null && Micr.getText() != null
&& current_Balance.getText() != null) {
try {
String accountNumber = account_Number.getText().toString();
String customerNumber = customer_Number.getText()
.toString();
String accountHolder = account_Holder.getText().toString();
String bankName = bank_Name.getText().toString();
String branchName = branch_Name.getText().toString();
String branchAddress = branch_Address.getText().toString();
String ifsc = Ifsc.getText().toString();
String micr = Micr.getText().toString();
String currentBalance = current_Balance.getText()
.toString();
DatabaseClass entry = new DatabaseClass(AddnewAccount.this);
entry.open();
entry.createEntry(accountNumber, customerNumber,
accountHolder, bankName, branchName, branchAddress,
ifsc, micr, currentBalance);
} catch (Exception e) {
work = false;
Dialog message = new Dialog(this);
message.setTitle("Error");
String error = e.toString();
TextView tv = new TextView(this);
tv.setText(error);
message.setContentView(tv);
message.show();
} finally {
Toast message = Toast.makeText(AddnewAccount.this,
"Data Added Successfully", Toast.LENGTH_SHORT);
message.show();
Intent goBackHome = new Intent(AddnewAccount.this,
AccountManagerActivity.class);
startActivity(goBackHome);
finish();
}
} else {
Toast message = Toast.makeText(AddnewAccount.this, // not getting executed
"Please Fill All The Fields", Toast.LENGTH_LONG);
message.show();
Intent refill = new Intent(AddnewAccount.this,
AddnewAccount.class);
startActivity(refill);
finish();
}
break;
}
}

A blank EditText field does not return null for getText(), but rather returns "".
Just check if .getText().toString().trim().equals("") for each field.

check like,,,
String a_number = account_Number.getText().tostring().trim();
String c_number = customer_Number.getText().tostring().trim();
if(TextUtils.isEmpty(a_number) || TextUtils.isEmpty(c_number)){
Toast.makeText(AddnewAccount.this,
"Please Fill All The Fields", Toast.LENGTH_LONG).show();
}else{
//Nothing is empty...
}