Android 9 Development Cookbook - Third Edition

How to do it...

First, we need to add the appropriate permission to make the call. Then, we need to add a button to call our Dial method. Start by opening the Android Manifest and follow these steps:

1. Add the following permission:

<uses-permission android:name="android.permission.CALL_PHONE"/>

2. Open activity_main.xml and replace the existing TextView with the following button:

<Button    android:id="@+id/button"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Dial"    android:onClick="dialPhone"    app:layout_constraintBottom_toBottomOf="parent"    app:layout_constraintLeft_toLeftOf="parent"    app:layout_constraintRight_toRightOf="parent"    app:layout_constraintTop_toTopOf="parent" />

3. Add this method, which will ...