For, ACTION_CALL<\/strong> you need to follow the below code.<\/p>\n For ACTION_DIAL,<\/strong> you need to follow the below code.<\/p>\n After you have created the intent, then you need to pass the recipient number as data. So, for this, you can make a URI object. After forming the URI object, just call the data method over the intent. Finally, start the intent to make a call.<\/p>\n There are some common scenarios that we all face while we handle a call. They are as follows:<\/p>\n 1. Receive a call While handling these scenarios, the system uses ConnectionService API<\/strong> and also classes from android.Telecom package.<\/strong> Let\u2019s see each of the scenarios in detail.<\/p>\n Whenever there is an incoming call, the system checks whether or not the device is attending other calls. We call further classify the scenarios below:<\/p>\n In this scenario, the app quickly receives the call, and the safe is then informed to the telecom subsystem. The addNewIncomingCall()<\/strong> takes the responsibility to inform the telecom about it.<\/p>\n The telecom subsystem is responsible for creating a connection by using the onCreateIncomingConnection()<\/strong> method.<\/p>\n For displaying the incoming call in the app\u2019s UI, the onShowIncomingCallUi()<\/strong> method is called. The process of receiving the call is much similar to the above. The only difference here is that the onShowIncomingCallUi()<\/strong> shows two more options to the user. The user gets an option to reject the previous call and accept or keep the previous call on hold and then accept.<\/p>\n Placing calls can be done quickly by the following the below method:<\/p>\n 1. By using the default call application.<\/strong><\/p>\n 2. By using intent actions like ACTION_DIAL and ACTION_CALL.<\/strong><\/p>\n While ending a call, the setDisconnected()<\/strong> method is called. After this, the destroy()<\/strong> method is called to release the running resources.<\/p>\n So, now we will explain how you can apply the above concepts to build your calling application using below steps:<\/p>\n 1:<\/strong> Launch your Android Studio.<\/p>\n 2:<\/strong> Select Create a New Project.<\/p>\n 3:<\/strong> Select Empty Activity and proceed.<\/p>\n 4:<\/strong> Enter your application name. In my case, it\u2019s \u201cTechVidvanCall\u201d Next, select Kotlin from the dropdown. For the API level, select API 22 for now.<\/p>\n 5:<\/strong> Now, you need first to add the permission, to make phone calls in your Manifest file.<\/p>\n Code:AndroidManifest.xml<\/strong><\/p>\n 6:<\/strong> Now go to res —> layout —-> and open activity_main.xml. Now here, you need to add one edit text and a button.<\/p>\n Code: activity_main.xml<\/strong><\/p>\n Step 7:<\/strong> Now go to your MainActivity.kt file and paste the below code.<\/p>\n Code: MainActivity.kt<\/strong><\/p>\n Now run your application. The application would look as follows:<\/p>\n Now just enter the number of the person whom you wish to call.<\/p>\nval intentObject = Intent(Intent.ACTION_CALL)\r\n<\/pre>\n
val intentObject = Intent(Intent.ACTION_DIAL)<\/pre>\n
\/\/now set the data for the intent as the phoneNumber\r\nintentObject.data = Uri.parse(\"tel:\" + phoneNumber)\r\nstartActivity(intentObject)\r\n<\/pre>\n
Calling Scenarios in Android<\/h3>\n
\n2. Place a call
\n3. Hang up a call<\/p>\nReceive a Call in Android<\/h4>\n
a. Your device is not on any other call.<\/h5>\n
\nAfter the user accepts the call the setActive() method is triggered else setDisconnected()<\/strong> method is triggered.<\/p>\nb. If already the device has, an ongoing call<\/h5>\n
Place a Call in Android<\/h4>\n
Hang up a Call in Android<\/h4>\n
Implementation of Android Event Handling<\/h3>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<manifest xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n package=\"com.techvidvan.techvidvancall\">\r\n\r\n <!-- Add permission to make a phone call-->\r\n <uses-permission android:name=\"android.permission.CALL_PHONE\"\/>\r\n\r\n <application\r\n android:allowBackup=\"true\"\r\n android:icon=\"@mipmap\/ic_launcher\"\r\n android:label=\"@string\/app_name\"\r\n android:roundIcon=\"@mipmap\/ic_launcher_round\"\r\n android:supportsRtl=\"true\"\r\n android:theme=\"@style\/Theme.TechVidvanCall\">\r\n <activity android:name=\".MainActivity\">\r\n <intent-filter>\r\n <action android:name=\"android.intent.action.MAIN\" \/>\r\n\r\n <category android:name=\"android.intent.category.LAUNCHER\" \/>\r\n <\/intent-filter>\r\n <\/activity>\r\n <\/application>\r\n\r\n<\/manifest>\r\n<\/pre>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<androidx.constraintlayout.widget.ConstraintLayout\r\n xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\r\n xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\r\n xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"match_parent\"\r\n android:background=\"@color\/black\"\r\n tools:context=\".MainActivity\">\r\n\r\n <TextView\r\n android:id=\"@+id\/title\"\r\n android:layout_width=\"wrap_content\"\r\n android:layout_height=\"wrap_content\"\r\n android:text=\"Tech Vidvan Calling App\"\r\n android:textStyle=\"bold\"\r\n app:layout_constraintVertical_bias=\".08\"\r\n android:textSize=\"30sp\"\r\n android:textColor=\"#FF9800\"\r\n app:layout_constraintBottom_toBottomOf=\"parent\"\r\n app:layout_constraintLeft_toLeftOf=\"parent\"\r\n app:layout_constraintRight_toRightOf=\"parent\"\r\n app:layout_constraintTop_toTopOf=\"parent\" \/>\r\n\r\n <EditText\r\n android:id=\"@+id\/edit_phone_number\"\r\n android:layout_width=\"match_parent\"\r\n android:layout_height=\"wrap_content\"\r\n android:layout_margin=\"30dp\"\r\n android:hint=\"Enter Phone Number\"\r\n android:inputType=\"phone\"\r\n android:background=\"@color\/white\"\r\n android:padding=\"10dp\"\r\n android:textSize=\"20sp\"\r\n app:layout_constraintVertical_bias=\".3\"\r\n app:layout_constraintBottom_toBottomOf=\"parent\"\r\n app:layout_constraintLeft_toLeftOf=\"parent\"\r\n app:layout_constraintRight_toRightOf=\"parent\"\r\n app:layout_constraintTop_toTopOf=\"parent\"\r\n \/>\r\n\r\n <Button\r\n android:layout_width=\"wrap_content\"\r\n android:layout_height=\"wrap_content\"\r\n android:id=\"@+id\/call_button\"\r\n android:onClick=\"makeCall\"\r\n android:text=\"Make a call\"\r\n android:backgroundTint=\"#FF9800\"\r\n android:textColor=\"@color\/black\"\r\n android:textStyle=\"bold\"\r\n app:layout_constraintVertical_bias=\".5\"\r\n app:layout_constraintHorizontal_bias=\".8\"\r\n app:layout_constraintBottom_toBottomOf=\"parent\"\r\n app:layout_constraintLeft_toLeftOf=\"parent\"\r\n app:layout_constraintRight_toRightOf=\"parent\"\r\n app:layout_constraintTop_toTopOf=\"parent\"\r\n \/>\r\n\r\n\r\n<\/androidx.constraintlayout.widget.ConstraintLayout>\r\n<\/pre>\n
package com.techvidvan.techvidvancall\r\n\r\nimport android.content.Intent\r\nimport android.net.Uri\r\nimport androidx.appcompat.app.AppCompatActivity\r\nimport android.os.Bundle\r\nimport android.view.View\r\nimport android.widget.EditText\r\n\r\nclass MainActivity : AppCompatActivity()\r\n{\r\n \/\/Declaring Edit Text variable\r\n lateinit var phone_edit_text:EditText\r\n\r\n override fun onCreate(savedInstanceState: Bundle?)\r\n {\r\n super.onCreate(savedInstanceState)\r\n setContentView(R.layout.activity_main)\r\n\r\n \/\/Binding edit text view to the variable\r\n phone_edit_text = findViewById(R.id.edit_phone_number)\r\n }\r\n\r\n fun makeCall(view: View)\r\n {\r\n \/\/when the user presses the\r\n \/\/call button\r\n var phoneNumber = phone_edit_text.text.toString()\r\n\r\n \/\/the we need to make an intent\r\n val intentObject = Intent(Intent.ACTION_DIAL)\r\n \/\/now set the data for the intent as the phoneNumber\r\n intentObject.data = Uri.parse(\"tel:\" + phoneNumber)\r\n startActivity(intentObject)\r\n }\r\n}\r\n<\/pre>\n![\"Android](\"https:\/\/techvidvan.com\/tutorials\/wp-content\/uploads\/sites\/2\/2021\/07\/App_output_1-3.jpg\")
<\/a><\/p>\n