How to acknowledge a message on WhatsApp

Whatsapp is the one of most popular messaging App. Many android applications need the functionality to share some messages directly from their app to WhatsApp. For example, if a user wants to share the app or share a message from the app then this functionality comes in use. Either user can send a text or a predefined text can also be sent through this. This article demonstrates how an android application can send messages on WhatsApp. Whatsapp must be installed on the user’s device.

Approach

Step 1:Open the activity_main.xml file and add the layout code. A message input container as EditText and a Button to send this message is added.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<xml0

xml1xml2=xml4

xml1xml6=xml8

xml1version0=version2

xml1version4=version6

xml1version8=version6

xml1=2==4

xml1=6==8=9

"1.0"0 

"1.0"1"1.0"2

"1.0"1<"1.0"5

"1.0"6"1.0"7="1.0"9

"1.0"6version4=version6

"1.0"6version8=encoding7

"1.0"6encoding9==1

"1.0"6=3==5

"1.0"6=7==9

"1.0"6"utf-8"1="utf-8"3

"1.0"6"utf-8"5="utf-8"7

"1.0"6"utf-8"9

"1.0"0 

"1.0"1?>2

"1.0"1<?>5

"1.0"6"1.0"7=?>9

"1.0"6version4=encoding7

"1.0"6version8=encoding7

"1.0"6<9=xml01

"1.0"6xml03=xml05

"1.0"6xml07=xml09

"1.0"6xml11=xml13"utf-8"9

"1.0"0 

xml16xml0=9

Step 2: Take the reference of EditText and Button in Java file. References are taken using the ids with the help of findViewById() method.

• Taking reference to EditText
  

  EditText messageEditText = findViewById(R.id.message);

• Taking reference to Button
  

  Button submit = findViewById(R.id.submit);

Step 3: Write function to send message to whatsapp. Create an intent with ACTION_SEND and specify the whatsapp package name to this so that it opens whatsapp directly.

com.whatsapp is the package name for official whatsapp application.

xml19 xml20 xml21

xml22

"1.0"0 

xml1xml25

xml1xml27

xml28=xml30 xml31

"1.0"0 

xml1xml34xml35xml36

xml1xml38xml39xml36

"1.0"0 

xml1xml43

xml1xml45

xml28xml47

xml28xml49

"1.0"0 

xml1xml52

xml1xml54

xml1xml56 xml57

xml58xml59

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xml68xml72xml70

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xml1xml82

"1.0"0 

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Step 4: Set onClickListener to the button. It takes the text entered by the user and calls the function sendMessage in which the text message is sent as a parameter.