Develop Reference

NumberFormatException For Input String "4018.B"

The following code comes from a Android App for Handheld Scanner Device; the Device should scan different Barcodes and QR codes, different digit ranges, numbers and digits;
that´s why I decided to go with .matcher instead of Regular Expressions; The following code works fine when it comes to parse combinations like "1367+700" etc.:
editBarcode.setOnClickListener(new View.OnClickListener() { //tv is the TextView.
public void onClick(View v) {
code = editBarcode.getText().toString();
XXXStorageApp.getInstance().setScannedCode(code);
editBarcode.setText("");
if (ScanService.checkEnteredCode(code, basic, content, MainDetailActivity.this) == true) {
return;
}
else {
Pattern p = Pattern.compile(code);
Matcher matcher = p.matcher(Pattern.quote("\\+"));
if (matcher.find()){
retrievedItemNo = String.valueOf(matcher);
}
String intermediateItemNo = code;
String[] splitString = intermediateItemNo.split(Pattern.quote("+"));
retrievedItemNo = splitString [0];
String intermediateString = code.substring(code.indexOf("+") + 1);
retrievedQuantity = intermediateString.split("\\+")[0];
if(XXXStorageApp.getInstance().NoList.contains(retrievedItemNo) || XXXStorageApp.getInstance().EanList.contains(scannedCode)){
Log.d(String.valueOf(XXXStorageApp.getInstance().NoList),"NoList");
Log.d(String.valueOf(XXXStorageApp.getInstance().EanList),"EanList");
}
else {
Log.d(String.valueOf(XXXStorageApp.getInstance().NoList),"NoList");
Log.d(String.valueOf(XXXStorageApp.getInstance().EanList),"EanList");
Vibrator vibrator;
vibrator = (Vibrator) getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(3000);
Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), notification);
r.play();
Toast.makeText(getApplicationContext(), R.string.not_in_database, Toast.LENGTH_LONG).show();
return;
}
if (!addBooking.isEnabled() == true && removeBooking.isEnabled())
{
AddBookingMessage message = new AddBookingMessage();
message.setType("add-item-to-pallet");
message.setPalNo(receivedPalNo);
message.setItem(retrievedItemNo);
if (String.valueOf(retrievedQuantity).matches("") ||
retrievedQuantity == null ||
retrievedQuantity.trim().isEmpty()) {
final Dialog dialog = new Dialog(MainDetailActivity.this, 0);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setCancelable(true);
dialog.setContentView(R.layout.sortiment_layout);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
TextView textView = dialog.findViewById(R.id.textView4);
Button okButton = dialog.findViewById(R.id.ok);
okButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
retrievedQuantity = textView.getText().toString();
message.setQuantity(Integer.valueOf(retrievedQuantity));
message.setSource(source);
message.setTime(time);
RestClient.putBookingOnPallet(basic, message, MainDetailActivity.this);
dialog.dismiss();
}
});
Button cancelButton = dialog.findViewById(R.id.cancel);
cancelButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
else
{
message.setQuantity(Integer.valueOf(retrievedQuantity));
message.setSource(source);
message.setTime(time);
RestClient.putBookingOnPallet(basic, message, MainDetailActivity.this);
}
}
if (addBooking.isEnabled() && !removeBooking.isEnabled() == true)
{
AddBookingMessage message = new AddBookingMessage();
message.setType("remove-item-from-pallet");
message.setPalNo(receivedPalNo);
message.setItem(retrievedItemNo);
message.setEan(scannedCode);
if (spinner != null && spinner.getSelectedItem() != null) {
source = spinner.getSelectedItem().toString();
}
if (String.valueOf(retrievedQuantity).matches("") || retrievedQuantity == null
|| retrievedQuantity.trim().isEmpty())
{
final Dialog enterDialog = new Dialog(MainDetailActivity.this, 0);
enterDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
enterDialog.setCancelable(true);
enterDialog.setContentView(R.layout.sortiment_layout);
enterDialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
TextView enterQuantityView = enterDialog.findViewById(R.id.textView4);
Button okQuantityButton = enterDialog.findViewById(R.id.ok);
okQuantityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
retrievedQuantity = enterQuantityView.getText().toString();
message.setQuantity(Integer.valueOf(retrievedQuantity));
message.setSource(source);
message.setTime(time);
RestClient.removeItemFromPallet(basic, message, MainDetailActivity.this);
enterDialog.dismiss();
}
});
Button cancelQuantityButton = enterDialog.findViewById(R.id.cancel);
cancelQuantityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
enterDialog.dismiss();
}
});
enterDialog.show();
}
else {
message.setQuantity(Integer.valueOf(retrievedQuantity));
message.setSource(source);
message.setTime(time);
RestClient.removeItemFromPallet(basic, message, MainDetailActivity.this);
}
}
editBarcode.setText("");
}}
however the App crashes with a
java.lang.NumberFormatException: For input string: "4018.B"
So, the problem here is to parse a string like "4018.B+95".
I don´t know how to handle this mixed input String with .matcher and definitely don´t want to use a Regular Expression; so basically, all of the following Input Strings - including Type conversion - should be handled correctly:
1256+70
1235.B+70
1256+70+DB
1235.B+70+DB
1256+70+DB2020-123
1235.B+70+DB2020-123
1256+0+DB2020-123
1235.B+0+DB2020-123
So, basically I need a condition for .matcher() that handles input like
"1235.B"
a mixed Integer and String; I need to store it in one variable which is of type String;
the problem here is that the "." in "1235.B" is not recognized and the App crashes hence, because the Number contains a string (".B")
So, two questions here:
How can I use .matcher() to recognize if a String contains ".B" or ".C" or anything similar?
How do I handle the different Types correctly in one Variable type?
As I am stuck with this, I would appreciate any hints or help.

getIntent(), getStringExtra() are deprecated

I'm trying to pass strings from one activity to another.
googleMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
#Override
public void onInfoWindowClick(Marker marker) {
String m = markerMap.get(marker.getId());
for(int i = 0; i < 8; i++) {
if(m.equals(name[i])) {
Intent intent = new Intent(MapsActivity.this, CustomInfoWindowAdapter.class);
intent.putExtra("FOOD_BANK",name[i]);
intent.putExtra("STREET_ADDRESS",address[i]);
intent.putExtra("WEBSITE",website[i]);
startActivity(intent);
}
}
}
});
That's the chunk of code that is supposed to send the strings to the other activity.
private void rendowWindowText(Marker marker, View view) {
Intent intent = getIntent();
String foodBank = getStringExtra("FOOD_BANK");
TextView tvTitle = (TextView) view.findViewById(R.id.title);
tvTitle.setText(foodBank);
String snippet = marker.getSnippet();
TextView tvSnippet = (TextView) view.findViewById(R.id.snippet);
String address = getStringExtra("STREET_ADDRESS");
tvSnippet.setText(address);
/*if(!title.equals("")) {
tvTitle.setText(title);
}*/
}
This bit is what should be receiving the data but getIntent() and getStringExtra() are deprecated. I've tried surpressing the deprecation with #SuppressWarnings("deprecation") before the method. I've tried restarting Android Studio and my computer with no avail. I've tried getActivity().getIntent(); and no luck either.
The message when I hover my cursor over the deprecated getIntent() is:
Cannot resolve method 'getIntent' in 'CustomInfoWindowAdapter'
Would really appreciate any ideas on how to fix this because I'm very new to Android Studio and Java in general.

To get the data which u sent, use the following code :
Bundle extras = getIntent().getExtras();
if (extras != null) {
String foodBank = extras.getString("FOOD_BANK");
String address = extras.getString("STREET_ADDRESS");
}

Pass information between activities

I am doing a project where I have to program a pedometer. The pedometer will work using a button and you have to tell the length of your steps. I made a main activity that let you choose between go anonymous an another one that let you register. The aplication works when I register or when I go anonymous, and the step length is passed well to the third activity, an activity where you can press a button and increase the number of steps done and the meters done. In this activity there is another button to configure the length of your steps and I want to pass all the info to the anonymous activity to change only the length of the steps and I pass all the info. I used the method putExtra() and getIntent().getExtra().getString(), but only works going to the main activity to the registe/anonymous activity and then going to the pedometer activity, but when i want to configure the length of the steps the aplications stops.
This is my code for the anonymous activity:
if(this.getIntent().hasExtra("name")){
names=this.getIntent().getExtras().getString("name");
}else{
names="";
}
if(this.getIntent().hasExtra("user")){
userName=this.getIntent().getExtras().getString("user");
}else{
userName="";
}
if(this.getIntent().hasExtra("pass")){
password=this.getIntent().getExtras().getString("pass");
}else{
password="";
}
if(this.getIntent().hasExtra("feetBefore")){
footBefore=this.getIntent().getExtras().getString("feetBefore");
}else{
footBefore="0";
}
if(this.getIntent().hasExtra("steps")){
stepsDone=this.getIntent().getExtras().getString("steps");
}else{
stepsDone="0";
}
Button continueBtn = findViewById(R.id.continueAnonymous);
foot = findViewById(R.id.lengthFeetAnonymous);
continueBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String footSize = String.valueOf(foot.getText());
if(!footSize.equals("")) {
Intent mainAnonymous = new Intent(getApplicationContext(), Main5Activity.class);
mainAnonymous.putExtra("name", names);
mainAnonymous.putExtra("user", userName);
mainAnonymous.putExtra("pass", password);
mainAnonymous.putExtra("feet", footSize);
mainAnonymous.putExtra("steps", stepsDone);
mainAnonymous.putExtra("feetBefore", footBefore);
startActivity(mainAnonymous);
finish() ;
}else{
Toast.makeText(Main4Activity.this, "You have to complete all the backets.",
Toast.LENGTH_SHORT).show();
}
}
});
This is the code of my pedometer activity:
Bundle parameters = this.getIntent().getExtras();
if(parameters != null){
name = parameters.getString("name");
username = parameters.getString("user");
password = parameters.getString("pass");
String foot = parameters.getString("feet");
String footBefore = parameters.getString("feetBefore");
String stepsDone = parameters.getString("steps");
if(stepsDone!=null) cont = Integer.parseInt(stepsDone);
else cont =0;
if(footBefore!=null)feetBefore = Integer.parseInt(footBefore);
else feetBefore =0;
if(foot !=null)feet = Float.parseFloat(foot)/100;
else feet = (float) 0.43;
cont2 = cont*feetBefore;
}else {
name = "";
username = "";
password = "";
feet = (float) 0.43;
}
increase = findViewById(R.id.increaseStep);
configuration = findViewById(R.id.confBtn);
saveMain = findViewById(R.id.saveBtnMain);
resume = findViewById(R.id.resumBtn);
final TextView steps = findViewById(R.id.stepCounter);
final TextView km = findViewById(R.id.kilometerCounter);
steps.setText(String.format(Locale.ENGLISH,"%d Steps",cont));
String aux =String.format(Locale.ENGLISH,"%.2f Meters", cont2);
km.setText(aux);
increase.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
cont++;
steps.setText(String.format(Locale.ENGLISH,"%d Steps",cont));
cont2 += feet;
String aux =String.format(Locale.ENGLISH,"%.2f Meters", cont2);
km.setText(aux);
}
});
configuration.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent conf = new Intent(getApplicationContext(), Main4Activity.class);
conf.putExtra("name", name);
conf.putExtra("user", username);
conf.putExtra("pass", password);
String aux2 = String.valueOf(cont);
conf.putExtra("steps", aux2);
float aux4 =feet*100;
String aux3 = String.valueOf(aux4);
conf.putExtra("feetBefore", aux3);
startActivity(conf);
finish() ;
}
});
}
I started to learn android yesterday so I don't know what I am doing wrong. If you can help me I would apreciate it. In addition, I think it's something about the bundle.

Add all data in a bundle and check only if bundle!=null –by Milan Pansuriya
I don't know the difference between using a bundle to pass al the data and putExtra to my intent but this works for me. Thank you Milan Pansuriya.

Android Studio - Voice search - Crashing on saying number 2 and 4

I have an activity that has voice function. which lets you say 4 words and these words are added into an array. I am want only the second and the last word.
I am converting the second word into a string and the last word into an int (last word is always a number from 1-5).
The code is working fine as long as I don't say 2 or 4. as soon I say those two numbers the app crashes.
how can I fix this?
I tried of thinking of inserting an if statement. for example - if string contains word for, four then it = 4. (rough code).
I have posted the code and stack trace below.
public class Report extends AppCompatActivity {
private static final int REQ_CODE_SPEECH_INPUT = 100;
private TextView mVoiceInputTv;
private ImageButton mSpeakBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.report);
mVoiceInputTv = (TextView) findViewById(R.id.voiceInput);
mSpeakBtn = (ImageButton) findViewById(R.id.btnSpeak);
mSpeakBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startVoiceInput();
}
});
final String carreg = mVoiceInputTv.getText().toString();
}
private void startVoiceInput() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "e.g- Report fpg563 rating 3");
try {
startActivityForResult(intent, REQ_CODE_SPEECH_INPUT);
} catch (ActivityNotFoundException a) {
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQ_CODE_SPEECH_INPUT: {
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
mVoiceInputTv.setText(result.get(0));
}
break;
}
}
if(mVoiceInputTv.getText().toString().contains("report")) {
input();
}
}
public void input() {
String test = mVoiceInputTv.getText().toString();
String[] ms = test.split(" ");
List<String> selectedWords = new ArrayList<>();
for (int i = 0; i < ms.length; i++) {
selectedWords.add(ms[i]);
final String carreg = ms[1];
final String newrating = ms[3];
final int rating = Integer.parseInt(newrating);
Response.Listener<String> responseListener = new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if (success) {
Intent intent = new Intent(Report.this, Report.class);
Report.this.startActivity(intent);
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(Report.this);
builder.setMessage("Reporting Failed")
.setNegativeButton("Retry", null)
.create()
.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
Report_request registerRequest = new Report_request(carreg, rating, responseListener);
RequestQueue queue = Volley.newRequestQueue(Report.this);
queue.add(registerRequest);
}
}
}
Stack Trace:
10-25 17:45:41.449 32501-32501/com.example.naveen.loginregister E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.naveen.loginregister, PID: 32501
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=Intent { launchParam=MultiScreenLaunchParams { mDisplayId=0 mFlags=0 }(has extras) }} to activity {com.example.naveen.loginregister/com.example.naveen.loginregister.Report}: java.lang.NumberFormatException: For input string: "for"
at android.app.ActivityThread.deliverResults(ActivityThread.java:4472)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4515)
at android.app.ActivityThread.-wrap22(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1687)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: java.lang.NumberFormatException: For input string: "for"
at java.lang.Integer.parseInt(Integer.java:521)
at java.lang.Integer.parseInt(Integer.java:556)
at com.example.naveen.loginregister.Report.input(Report.java:103)
at com.example.naveen.loginregister.Report.onActivityResult(Report.java:85)
at android.app.Activity.dispatchActivityResult(Activity.java:7256)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4468)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4515) 
at android.app.ActivityThread.-wrap22(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1687) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6682) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410) 
whats up with this downvotes? im asking an honest question. ofcourse the grammer might be bad. but im still learning english. u want me to go to a english classs before i post a question?

This is must be happening because 2 is also the word "to" or "too" which is not going to be convertable into an int unless you are catching those cases. Similarly, as you pointed out 4 is probably being converted to the word "for" which again won't convert to an int unless you specifically catch that case.
I think you're on the right track, catching those cases where the voice to text is going to hand you a word that sounds like a number but isn't one.
BUT if you want your code to not crash you need to prepare for any possible input. So you should be catching the exception if it is thrown and then doing the right thing.
try {
final int rating = Integer.parseInt(newrating);
} catch ( NumberFormatException e ) {
//uhoh couldn't get the number
//prompt the user to try again or
//do something else that makes sense
}

How to start an activity which calls a method from a different class?

I have an activity which transfer a string datatype to another activity which then uses that string and calls a method from another class which returns a string. I want to use that method to display the string in the current activity.
So visually it goes (activity 1) -- string--> (activity 2). Activity 2 uses that string to call a method in a different java class which returns a type string which i want to display on the screen along with a few buttons.
So some pseudo code:
say The method in a different java class is:
public static String getStringexample(String n) {
return "hello" + " " + n;
}
and my activity class is:
public class manage extends Activity {
protected void onCreate(bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContainerView(R.layout.activity_manage);
Intent intent = getIntent();
String example = intent.getExtras().getString("intentid");
i'm lost after this..not sure how to use what i got from the intent to display it on the screen in java code.

Information between activities is passed in 'extras'. That is just a collection of string keys and values.
Both sides need to use the same keys, so define static final strings with they keys that your destination activity expects.
Then read the values from the extras using the key and go from there:
public class DestinationActivity extends Activity {
// let your callers know how to pass you the information you need
public static final String EXTRA_N = "n";
private TextView resultText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_destination);
resultText = (TextView) findViewById(R.id.resultText);
// get the information you was passed
Intent intent = getIntent();
String n = intent.getStringExtra(EXTRA_N);
// do your transformation using the other class
String example = DifferentClass.getStringexample(n);
// display the transformed string
resultText.setText(example);
}
// ...
}
The calling activity sends the information like this:
Intent intent = new Intent(this, DestinationActivity.class);
intent.putExtra(DestinationActivity.EXTRA_N, "foo");
startActivity(intent);
Good luck

You can start activity as
Intent i = new Intent(this, SecondActivity.class);
startActivityForResult(i, 1);
Then return to first activity from second activity
Intent returnIntent = new Intent();
returnIntent.putExtra("result",yourdata);
setResult(RESULT_OK,returnIntent);
finish();
In your first activity you will get result by using below code
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if(resultCode == RESULT_OK){
String result=data.getStringExtra("result");
}
if (resultCode == RESULT_CANCELED) {
//Write your code if there's no result
}
}
}