If you are developing and Android Application wherein you want to integrate WhatsApp App to send messages to your contacts, you can achieve it simply by explicit Intents.

Sending WhatsApp Message form your App Tutorial.png
Let's take a simple example for demonstration,
We create an Android App with a Layout.xml containing an EditText to type a message and Button. When the button is clicked we fetch the value of the EditText and send it to WhatsApp application using Intent.
activity_main.xml
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.code2care.example.whatsappintegrationexample.MainActivity"
tools:ignore="HardcodedText" >
android:id="@+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:onClick="sendMessae"
android:layout_marginBottom="21dp"
android:text="Send to WhatsApp" />
android:id="@+id/editText1"
android:layout_width="fill_parent"
android:hint="Type your WhatsApp message here ...."
android:layout_alignParentTop="true"
android:background="#FFFFFFEF"
android:padding="10dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="65dp"
android:layout_height="200dp"
android:ems="10" />
MainActivity.java
package com.code2care.example.whatsappintegrationexample;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
private EditText message;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
message = (EditText) findViewById(R.id.message);
}
public void sendMessage(View v) {
String whatsAppMessage = message.getText().toString();
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, whatsAppMessage);
sendIntent.setType("text/plain");
// Do not forget to add this to open whatsApp App specifically
sendIntent.setPackage("com.whatsapp");
startActivity(sendIntent);
}
}
More Posts related to WhatsApp,
- Officially Send WhatsApp message using webpage (html)
- Share Multiple Images in WhatsApp using Android Intent
- How to Install WhatsApp application on Mac
- How to resolve Certificate Expired WhatsApp Error
- How to send WhatsApp message from your Android App using Intent
- [Solution] Installing Whatsapp There's insufficient space on the device
- WhatsApp launches WhatsApp Web to Access Messages over web browser
- How to know if someone has read your WhatsApp message
- Share Image to WhatsApp with Caption from your Android App
- WhatsApp Web escanner
- Can we move apps like WhatsApp, Facebook to external MicroSD card
More Posts:
- How to remove Siri from Menu Bar [macOS Big Sur] - MacOS
- How to fix Microsoft Windows 10 update error 80070020 - Microsoft
- Bootstrap Nav Menu Dropdown on hover - Bootstrap
- Android Parsing Data for android-L failed Unsupported major.minor version 51.0 Error - Android
- How to open a new tab in Notepad++ - NotepadPlusPlus
- Notepad++ Editor alternatives for Mac OS X - NotepadPlusPlus
- Create SharePoint Site Collection with new Content database in existing web application - SharePoint
- Change Height of Android ActionBar - Android