With no problem, connected my app to firebase and I can test realtime database and other features, but when it comes to Phone Authentication, I am having problems. The problem is when Edittext is left empty and Button is clicked the app gets crashed. Don't know which code should be responsible for this problem.
Please help me to define it.
If you have carefully read the documentation of phone auth in firebase you will have below code:
private boolean validatePhoneNumber() {
String phoneNumber = mPhoneNumberField.getText().toString();
if (TextUtils.isEmpty(phoneNumber)) {
mPhoneNumberField.setError("Invalid phone number.");
return false;
}
return true;
Then either with if-else or switch-case
You should call this method
NOTE: onCLick method comes after btn.setOnClickListener depending upon your button id.
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button_start_verification:
if (!validatePhoneNumber()) {
return;
}
startPhoneNumberVerification(mPhoneNumberField.getText().toString());
break;
case R.id.button_verify_phone:
String code = mVerificationField.getText().toString();
if (TextUtils.isEmpty(code)) {
mVerificationField.setError("Cannot be empty.");
return;
}
verifyPhoneNumberWithCode(mVerificationId, code);
break;
case R.id.button_resend:
resendVerificationCode(mPhoneNumberField.getText().toString(), mResendToken);
break;
case R.id.sign_out_button:
signOut();
break;
}
}
Due to the codes which were not provided by you, I have written some references based on my own app. Please consider changing those and probably you wont get further crashes.
Related
I am making a chat application where I want the a user to get a notification when the other user sends a message. I've heard you can do it with a js script and followed the google guidelines but I'm confused where am I actually writing the script? Do I have to do the free trial for the google firebase environment?
You can do like this:-
DatabaseReference ref = FirebaseDatabase.getInstance().getReference(reference)
FirebaseArray snapshots = new FirebaseArray(ref);
snapshots.setOnChangedListener(new FirebaseArray.OnChangedListener() {
#Override
public void onChanged(EventType type, int index, int oldIndex) {
switch (type) {
case Added:
break;
case Changed:
break;
case Removed:
break;
case Moved:
break;
}
}
});
I have an application about pmt function. However there are so many conditions that need to be handled. Somehow the app will not work with having more than 12 if-else. I want to use switch case, but i still not really understand how to use switch case(been 1 and half month since my 1st try using eclipse).Any example will be highly appreciated.
here is my example code:
if(String1.toString().equals("condition1")){
//do something
if(String2.toString().equals("condition1.1")&& String3.toString().equals("condition1.2")){
//do something else
}
.
.
.
.
.
if(String2.toString().equals("condition1.##")&& String3.toString().equals("condition1.##")){
//do something else
}
}
else if(String1.toString().equals("condition2")){
//do something
if(String2.toString().equals("condition2.1")&& String3.toString().equals("condition2.2")){
//do something else
}
.
.
.
.
.
if(String2.toString().equals("condition2.##")&& String3.toString().equals("condition2.##")){
//do something else
}
}
if(String1.toString().equals("condition3")){
//do something
if(String2.toString().equals("condition3.1")&& String3.toString().equals("condition3.2")){
//do something else
}
.
.
.
.
.
if(String2.toString().equals("condition3.##")&& String3.toString().equals("condition3.##")){
//do something else
}
}
and still keep going....to handle all possibilities .I am wondering, How to do this in switch case . Or a better implementation if we have 3 times 3 conditions. For example a,b,c(suppose these three conditions can only be used once) and d,e,f and g,h,i then condition 1 is a,d,g ; condition 2 is a,d,h condition 3 is a,d,i ; condition 4 a,e,g........on so on
Note:Suppose that the API version is 8-11 (old android)
thanks
The answer is dependent on your target version of android. From KitKat and upwards (API Level 19+), Java 7's switch (String) is available. I'd also strongly suggest trying to group the subcases (condition n.x) into different methods. It just gets very unwieldly quickly, otherwise:
switch (String1.toString) {
case "condition1":
handleCase1(String2, String3);
break;
case "condition2":
handleCase2(String2, String3);
break;
}
If that still results in too complex code, you can try a lookup table together with a command pattern:
class ConditionKey {
final String String1;
final String String2;
final String String3;
public int hashCode(); // hash strings
public boolean equals(); // compare strings
}
interface ConditionCommand {
// use whatever arguments the operation needs, you can also
// add fields and initialize in the constructor
void perform(final ConditionKey key, /* [...] */);
}
Map<ConditionKey, ConditionCommand> actionMap = new HashMap<>();
actionMap.put(
new ConditionKey("condition1", "condition1.1", "condition1.2"),
new ConditionCommand() {
void perform(final ConditionKey key) {
// perform actions that need to be done
}
}
);
And then instead of the if-else or switch-case:
[...]
ConditionKey key = new ConditionKey(string1, string2, string3);
// get the action from the map
ConditionCommand command = actionMap.get(key);
// perform the command
command.perform(key);
since java 1.7 switch on string is supported.
you could annidate two switch:
switch(String1) {
case "condition1": {
switch(String2) {
case "condition1.1":
break;
// ... other cases
default:
break;
}
}
break;
// ... other cases
default break;
}
Previously i am using if else condition for checking the edit text field its working but i need to change into switch case.I am not getting to implement switch case inside my code.please tell me how to implement that in switch case.
btnSave.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
/**
* Validation
*/
if(tvStartLocation.getText().toString().equalsIgnoreCase(""))
{
Toast.makeText(getActivity(),"Please enter start location", Toast.LENGTH_SHORT).show();
}
else if(tvEndLocation.getText().toString().equalsIgnoreCase(""))
{
Toast.makeText(getActivity(),"Please enter end location", Toast.LENGTH_SHORT).show();
}
else if(etStartOdometer.getText().toString().equalsIgnoreCase(""))
{
Toast.makeText(getActivity(),"Please enter Trip Start Odometer reading", Toast.LENGTH_SHORT).show();
}
else
{
gotonextfraggment();
}
You cannot use a switch-case construct in your case. In a switch-case, only one argument is matched with the case labels and if there is a match, that label is executed.
switch(arg) {
case "label1":
case "label2":
.
.
.
default:
}
arg is tested with label1, label2 and so on.
In your case, in every else-if, you are trying to test the equality of the text in different EditTexts with "". So your arg changes in every else-if. Even if you try to implement switch-case, the arg of your switch-case will change continuously and you'll not be able to go any further. You cannot even do this:
switch("") {
case edittext1.getText():
case edittext2.getText();
.
.
.
default:
}
Because the case labels must be literals not variable values.
So it is impossible to implement switch-case for the problem that you are facing
In fact what you've done right now is the perfect way to do it.
I am using quickblox api for 1 to 1 videochat but I dont know the usage OnVideoChatChangeState() of OnQBVideoChatListener() class and with what changes the event is invoked. I have modified the code but the video doesnt start the click functions but doesn't go to:
` public void onVideoChatStateChange(CallState state, VideoChatConfig receivedVideoChatConfig) {
videoChatConfig = receivedVideoChatConfig;
isCanceledVideoCall = false;
Toast.makeText(getApplicationContext(), "switch", Toast.LENGTH_LONG).show();
switch (state)
{
case ON_CALLING:
Toast.makeText(getApplicationContext(), "After this the showCallDialog() will be called.", Toast.LENGTH_LONG).show();
showCallDialog();
break;
case ON_ACCEPT_BY_USER:
progressDialog.dismiss();
startVideoChatActivity();
break;
case ON_REJECTED_BY_USER:
progressDialog.dismiss();
break;
case ON_DID_NOT_ANSWERED:
progressDialog.dismiss();
break;
case ON_CANCELED_CALL:
isCanceledVideoCall = true;
videoChatConfig = null;
break;
case ON_START_CONNECTING:
progressDialog.dismiss();
startVideoChatActivity();
break;
default:
break;
}
}
};
`
and the showCallDialog(); method is not called this shows the events doesn't occur here.
So I want to know can the event occurs so that the methods are called.
This has been fixed. Master branch is updated. Please try download and use the sample once again.
I am trying to make a donation menu for my app. I have figured out the part that when a user clicks donate, more buttons come up saying how much. Now, I want to be able to have the amount buttons go away if they click the same button again. I want the regular DonateButton to remain. How would I come about doing that?
I have already set it as invisible using purchaseButton.setVisibility(View.GONE);
Here is the code for clicking the button and the other buttons appearing:
public void onClick(View v) {
switch (v.getId()) {
case R.id.DonateButton:
purchaseButton.setVisibility(View.VISIBLE);
purchaseButton2.setVisibility(View.VISIBLE);
purchaseButton3.setVisibility(View.VISIBLE);
case R.id.Donate:
if(BillingHelper.isBillingSupported()){
BillingHelper.requestPurchase(mContext, "donate");
// android.test.purchased or android.test.canceled or android.test.refunded
} else {
Log.i(TAG,"Can't purchase on this device");
}
break;
default:
// nada
Log.i(TAG,"default. ID: "+v.getId());
break;
case R.id.Donatetwo:
if(BillingHelper.isBillingSupported()){
BillingHelper.requestPurchase(mContext, "donate2");
// android.test.purchased or android.test.canceled or android.test.refunded
} else {
Log.i(TAG,"Can't purchase on this device");
}
break;
case R.id.Donatethree:
if(BillingHelper.isBillingSupported()){
BillingHelper.requestPurchase(mContext, "donate3");
// android.test.purchased or android.test.canceled or android.test.refunded
} else {
Log.i(TAG,"Can't purchase on this device");
}
break;
}
}
Screenshot of what I mean:
IMAGE URL (DON'T HAVE 10 REPUTATION YET):
http://i.stack.imgur.com/AMdhS.png
What I am trying to say is.
The app comes up just showing the "Donate!" Button. =>
The user clicks the "Donate!" Button. =>
The buttons "Donate $1", "Donate $3", and "Donate $5" appear. =>
I NEED HELP FROM HERE
A user wants to close the "Donate $1", "Donate $3", and "Donate $5" Buttons. =>
To close them, they click the "Donate!" which was the button they used to open it all. =>
The "Donate $1", "Donate $3", and "Donate $5" go away.
I want it to still allow them to open and close those buttons more than once though.
a simple state variable should do.
put this in your field definition area:
boolean areButtonAmountVisible = false;
and this code as your onClick():
case R.id.DonateButton:
if( areButtonAmountVisible )
{
areButtonAmountVisible = false;
purchaseButton.setVisibility(View.GONE);
purchaseButton2.setVisibility(View.GONE);
purchaseButton3.setVisibility(View.FONE);
}
else
{
areButtonAmountVisible = true;
purchaseButton.setVisibility(View.VISIBLE);
purchaseButton2.setVisibility(View.VISIBLE);
purchaseButton3.setVisibility(View.VISIBLE);
}
Try this.
Use getVisibility() method to know the visible state of button.
int visibility;
visibility = button.getVisibility();
if(visibility == View.VISIBLE) {
button.setVisibility(View.INVISIBLE);
} else {
button.setVisibility(View.VISIBLE);
}
You have to check like this for every button.
I will suggest one more thing.
Take a global variable and use it as notifier, use below code in all button click functions.
boolean again = false;
if (again) {
// make all invisible
again = false;
} else {
// make all visible
again = true;
}